Collecting matter in a medium, e.g. water in algae, is an expensive process which usually either damages the matter structurally or contaminates the matter so as to make the matter less usable for downstream commercial products, e.g. biofuels, pharmaceuticals, nutraceuticals, and cosmetics. Information relevant to attempts to address these problems can be found in the following: (1) U.S. Pat. No. 6,572,770; (2) US U.S. Pat. No. 5,715,774; (3) US 2010/0105125; (4) US 2010/0210003; (5) US 2011/0016773; (6) US 2009/0203115; (7) US 2010/0144017; (8) US 2010/0267122; (9) US 2011/0065165; (10) EP 942,646; (11) WO 2011038413; (12) WO 9851627; (13) US 20100105125; (14) WO 2010151887; (15) U.S. Pat. No. 3,917,528; (16) U.S. Pat. No. 4,172,039; (17) U.S. Pat. No. 5,259,958; (18) U.S. Pat. No. 6,732,499; (19) U.S. Pat. No. 6,572,770; (20) U.S. Pat. No. 6,393,812; and, (21) The Basics of Oil Spill Cleanup by Mery Fingas, ISBN 9781566705370, CRC Press, Sep. 28 2000. The listing of the preceding documents is in no way an admission of the documents as prior art against the present invention or even as analogous art. The citation of any publication is for its disclosure prior to the filing date and should not be construed as an admission that the present invention is not entitled to antedate such publication by virtue of prior disclosure and/or prior invention.
Each one of the listed documents, and the disclosed methods and apparatuses therein, suffers from one or more of the following disadvantages: (1) they require the use of expensive chemicals; (2) they require the use of chemicals which contaminate collected matter; (3) they require the use of high-energy machines; (4) they require the use of expensive machines; (5) they compromise the collected matter's structural and/or chemical integrity; (6) they require constant supervision by an operator; (7) they require continued replacement of collection and/or concentration parts; (8) they have a high initial capital cost barrier, and thus a disincentive, for market entry; and, (9) they raise the cost of downstream products and processes. Examples of methods and apparatuses which suffer from these disadvantages comprise centrifuges, hollow fiber filtration, cross flow filtration, tangential flow filtration, bubbling, flocculating and porous filters.
Extracting a suspended solid from a liquid medium using the known prior art methods and apparatuses is an expensive process that makes an entire industry of collection and concentration economically and environmentally unsound. Discovering a low cost and environmentally friendly solution to collecting and/or concentrating, e.g., algae in water could allow entire industries that derive, inter alia, biofuels, pharmaceuticals, nutraceuticals and cosmetics from harvested algae to become economically viable, and leaders of those industries can begin to fuel, feed and heal a twenty first century population. A device as described in the following detailed description provides advantages over the known attempts.
The present invention is directed to a system that satisfies this need of a low initial, operating and downstream cost while being a contaminant free and a non-damaging system for collecting matter suspended and/or dissolved in a liquid medium. This and other unmet advantages are provided by the device and method described and shown in more detail below.
A better understanding of the disclosed embodiments will be obtained from a reading of the following detailed description and the accompanying drawings wherein identical reference characters refer to identical parts:
a is a view of cut fibers;
b is a view of cut fibers;
c is a view of cut fibers and a first surface;
a is a view of material comprising cut fibers, looped fibers and a first surface;
b is a view of material comprising looped fibers, a second surface and a reinforcement fiber;
c is a zoom view of material comprising looped fibers, a second surface, a first surface and a reinforcement fiber;
d is a zoom view of material comprising looped fibers, a second surface, a first surface and a reinforcement fiber;
a is a view of cut fibers;
b is a view of cut fibers and a first surface;
c is a view of cut fibers and a first surface;
a is a view of a system for collecting matter comprising a third surface and material in a stack;
b is a view of a system for collecting matter comprising a third surface and material in a stack;
a is a view of material emerging from a medium with collected matter;
b is a view of material emerging from a medium with collected matter;
c is a view of material emerging from a medium with collected matter;
a is a view of algae attached to a fiber;
b is a view of oil among fibers;
a is a view of a system for collecting matter comprising a cell, a material and a container;
b is a view of a system for collecting matter comprising a cell, a material, an extractor and a container;
a is a view of a system for collecting matter comprising a container, a directional funnel and an extractor; and,
b is a view of a system for collecting matter comprising an extractor.
Prior to describing the various embodiments, the following definitions are provided and should be used unless otherwise indicated.
Definitions
In describing the disclosed subject matter, the following terminology will be used in accordance with the definitions set forth below.
“Comprising” is an open ended transition word that when preceding a list or description the word connotes that the following list or description does not fully list or describe all possibilities; therefore, the list or description can contain additional elements not listed or described.
“Consisting” is a close ended transition word that when preceding a list or description the word connotes that the following list or description is complete.
A “medium” is any environment which is predominantly liquid wherein solids and/or chemicals may exist in the medium in suspension, dispersion or solution. Medium refers to aqueous and non-aqueous mediums equally.
An “aqueous medium” is a medium which is predominantly comprised of liquid water, and the water is at least one selected from the group comprised of fresh water, brackish water, salt water, marine water, briny water, commercial waste water, residential waste water and agricultural waste water. Examples of bodies of aqueous mediums, which can be natural or engineered, include rivers, streams, ponds, lakes, oceans, bays, fjords, retaining ponds, settling ponds, raceways, holding tanks, settling tank, photo bio reactors. A “non-aqueous medium” is predominantly comprised of a non-water liquid, such as oil. A medium can be a combination of aqueous and non-aqueous mediums, i.e. it is difficult to tell what is predominant or localized variations in concentration would lead to differing conclusions.
“Deploying” is the action of introducing a material into a medium. A material that is deployed can be fully or partially submerged in a medium, floating on a surface of a medium, at a boundary of a medium, or combinations thereof.
“Resides” is a point in space where at least a substantial portion of material exists in a medium; therefore, a description of where the material resides is not intended to mean where 100% of the material resides, rather that is the general location where a substantial portion of the material is deployed.
“Matter” is a solid and/or chemical suspended, dispersed or dissolved in a medium. Matter is at least one selected from the group comprised of algae, oil, bacteria, silt, sand, ethane, hexanol, nitrates, phosphates, benzene, lead, mercury, cadmium, iron, aluminum and arsenic.
“Collection” is a capture of matter on a material, as described below. Collection also includes any matter which is captured by, between or proximate to matter already captured by the material. Matter can form multiple layers on the material surface, and any subsequent matter layers are considered to be collected though it may not be touching or interlocked with, or in physical or bonded contact with the material. The process of collection is at least one selected from the group of active collection, passive collection and growth collection. Similar words which are intended to invoke variations of this definition comprise collects, collecting, collected and to collect.
“Collected matter” is any matter that is collected by, between or proximate to a material.
“Active collection” is a process of how a material collects matter, and active collection occurs in two common scenarios: (1) when the material is predominantly collecting matter while in motion relative to the medium and/or matter; (2) when the material is predominantly collecting matter while the medium is forced to pass through, over and/or around the material. An example of (1) is when the material is passed through the medium by active dragging behind a boat or rotating like a conveyor belt. An example of (2) is when the material is fixed in a housing such as inside a medium conduit and the medium is forced by gravity and/or pressure to flow through, over and/or around the material.
“Passive collection” is a process of how a material collects matter, and passive collection occurs when the material is suspended in, placed on a surface or at a boundary of a medium and the matter collects on the material. Passive collection still occurs when there is relative motion between the material and/or the medium and/or the matter; however, that relative motion occurs, e.g., due to wind, currents and/or waves.
The practical difference between active and passive collection is that active collection occurs generally when humans directly or indirectly act to cause the relative motion whereas passive collection occurs generally when natural forces act to cause the relative motion. Additionally, the material can be actively collecting for a period of time and then transition to passive collection for another period of time. Furthermore, the boundary between what is active and passive collection may blur, e.g. when material is placed at an apex of a human made spill way and the medium flows through, over and/or around the material under force of gravity. That could be categorized as partially active and partially passive collection; however, if either passive or active collection is occurring, then the material is being used in accordance with this invention. In conclusion as to this point, active and passive are relative terms which are not intended to be mutually exclusive or absolute; they are only intended to roughly categorize different methods of deploying the material in a medium at any given time.
“Growth collection” is a process by which matter grows on a material, and growth collection occurs when a suspended and/or dissolved solid increases its mass while attached to the material due to metabolic processes. A suspended solid which is capable of growing on the material is algae and other microorganism to form a biofilm. Growth collection can be any proportion or no proportion, in relation to passive and active collection, of the method by which the matter is collected on the material.
“Material” is any three dimensional object, consistent with its description below, that is capable of collecting matter in a medium. “Material” is short for “material for collecting matter”; therefore, a reference to a material is understood to be a material for collecting matter, unless indicated otherwise.
“Deployed material” is material that was introduced into a medium irrespective of whether the material resides at a surface of the medium, a boundary of the medium or is fully or partially submerged in the medium.
An “extractor” is any device, consistent with its description below, that removes collected matter from a material. Examples of an extractor is at least one selected from the group comprising an orifice, a belt roller, a nested roller, a funnel, a vacuum, a scraper, an electric charge, a spinner, a vibrator, a human hand, a heater, a steamer and a low-volume high pressure sprayer. Similar words which are intended to invoke variations of this definition comprise extraction, extracting, to extract and extracts.
“Extracted matter” is any matter that is formerly collected matter due to an extractor or extraction process. The extracted matter will be a combination of formerly suspended and/or dissolved matter and the medium in which the matter was suspended and/or dissolved.
A “container” is any device which is capable retaining or storing, for any amount of time, collected matter while segregating the collected matter from a medium. Examples of containers are barrels, boxes, troughs, hoppers, tubes, pipes, trays, buckets and bladders. The collected matter can flow to the container in any number of ways, including by gravity, by pump, by conveyor, or by another container such as a pipe or bucket.
A “dwell time” or a “dwell period” is a duration that a material spends in a medium, and the material may be motionless or in motion. Collection occurs during the dwell period; however, the material is not necessarily collecting continuously or at a same rate during the dwell period.
A “boat” is any vessel for transport by water, constructed to provide buoyancy by excluding water and shaped to give stability and permit propulsion. A boat also includes any apparatus connected, attached or affixed, permanently or temporarily, to the boat and also including anything towed or transported by the boat such as a raft, dock, platform or flotation.
“Algae” is plural for any organism with chlorophyll and, in multicellular algae, a thallus not differentiated into roots, stems and leaves, and encompasses prokaryotic and eukaryotic organisms that are photoautotrophic or facultative heterotrophs. The term “algae” includes macroalgae (such as seaweed) and microalgae. For certain embodiments of the disclosure, algae that are not macroalgae are preferred. The term algae used interchangeably herein, refers to any microscopic algae, phytoplankton, photoautotrophic or facultative heterotroph protozoa, photoautotrophic or facultative heterotrophic prokaryotes, and cyanobacteria (commonly referred to as blue-green algae and formerly classified as Cyanophyceae). The use of the term “algal” also relates to microalgae and thus encompasses the meaning of “microalgal.” The term “algal composition” refers to any composition that comprises algae, and is not limited to the body of water or the culture in which the algae are cultivated. An algal composition can be an algal culture, a concentrated algal culture, or a dewatered mass of algae, and can be in a liquid, semi-solid, or solid form. A non-liquid algal composition can be described in terms of moisture level or percentage weight of the solids. An “algal culture” is an algal composition that comprises live algae.
The algae of the disclosure can be naturally occurring species, a selected strain, a genetically manipulated strain, a transgenic strain, or a synthetic alga. Algae from tropical, subtropical, temperate, polar or other climatic regions can be used in the disclosure. Endemic or indigenous algal species are generally preferred over introduced species where an open culturing system is used. Algae, including microalgae, inhabit all types of aquatic environments, including but not limited to freshwater (less than about 0.5 parts per thousand (ppt) salts), brackish (about 0.5 to about 31 ppt salts), marine (about 31 to about 38 ppt salts), and briny (greater than about 38 ppt salts). Any of such aquatic environments, freshwater species, marine species, and/or species that thrive in varying and/or intermediate salinities or nutrient levels, can be used in the embodiments of the disclosure.
In certain embodiments, the algal composition of the disclosure comprises green algae from one or more of the following taxonomic classes: Micromonadophyceae, Charophyceae, Ulvophyceae and Chlorophyceae. Non-limiting examples include species of Borodinella, Chlorella (e.g., C. ellipsoidea), Chlamydomonas, Dunaliella (e.g., D. salina, D. bardawil), Franceia, Haematococcus, Oocystis (e.g., O. parva, O. pustilla), Scenedesmus, Stichococcus, Ankistrodesmus (e.g., A. falcatus), Chlorococcum, Monoraphidium, Nannochloris and Botryococcus (e.g., B. braunii). In certain embodiments, the algal composition of the disclosure comprises golden-brown algae from one or more of the following taxonomic classes: Chrysophyceae and Synurophyceae. Non-limiting examples include Boekelovia species (e.g. B. hooglandii) and Ochromonas species. In certain embodiments, the algal composition in the disclosure comprises freshwater, brackish, or marine diatoms from one or more of the following taxonomic classes: Bacillariophyceae, Coscinodiscophyceae, and Fragilariophyceae. The diatoms can be photoautotrophic or auxotrophic. Non-limiting examples include Achnanthes (e.g., .4. orientalis), Amphora (e.g., Acoffeiformis strains, A. delicatissima), Amphiprora (e.g., A. hyaline), Amphipleura, Chaetoceros (e.g., C. muelleri, C. gracilis), Caloneis, Camphylodiscus, Cyclotella (e.g., C. cryptica, C. meneghiniana), Cricosphaera, Cymbella, Diploneis, Entomoneis, Fragilaria, Hantschia, Gyrosigma, Melosira, Navicula (e.g., N. acceptata, N. biskanterae, N. pseudotenelloides, N. saprophila), Nitzschia (e.g., N. dissipata, N. communis, N. inconspicua, N. pusilla strains, N. microcephala, N. intermedia, N. hantzschiana, N. alexandrina, N. quadrangula), Phaeodactylum (e.g., P. tricornutum), Pleurosigma, Pleurochrysis (e.g., P. carterae, P. dentata), Selenastrum, Surirella and Thalassiosira (e.g., T. weissflogii). In certain embodiments, the algal composition of the disclosure comprises one or more algae from the following groups: Coelastrum, Chlorosarcina, Micractinium, Porphyridium, Nostoc, Closterium, Elakatothrix, Cyanosarcina, Trachelamonas, Kirchneriella, Carteria, Crytomonas, Chlamydamonas, Planktothrix, Anabaena, Hymenomonas, lsochrysis, Pavlova, Monodus, Monallanthus, Platymonas, Pyramimonas, Stephanodiscus, Chroococcus, Staurastrum, Netrium, and Tetraselmis, Galdieria and Cyanidium, and any unknown algae having similar genus, family, or orders. In certain embodiments, the algal composition of the disclosure comprises one or more from the following groups: Porphyridium cruentum, Spirulina platensis, Cyclotella nana, Dunaliella salina, Dunaliella bardawil, Muriellopsis spp., Chlorella fusca, Chlorella zofingiensis, Chlorella spp., Haematococcus pluvialis, Chlorococcum citriforme, Neospongiococcum gelatinosum, lsochrysis galbana, Chlorella stigmataphora, Chlorella vulgaris, Chlorella pyrenoidosa, Chlamydomonas mexicana, Scenedesmus obliquus, Scenedesmus braziliensis, Scenedesmus dimorphus, Stichococcus bacillaris, Anabaena flos-aquae, Porphyridium aerugineum, Fragilaria sublinearis, Skeletonema costatum, Pavlova gyrens, Monochrysis lutheri, Coccolithus huxleyi, Nitzschia palea, Dunaliella tertiolecta, Prymnesium paruum, and the like. In certain embodiments, the algal composition of the disclosure comprises one or more from the following groups: N. gaditana, N. granulate, N. limnetica, N. oceanica, N. oculata, N. salina.
Preferred species of algae comprise Scenedesmus dimorphus, Nanochloropsis, Chlorella and diatoms.
A system for collecting matter, as described below, provides a low energy, low cost and nearly zero pollutant process for extracting suspended and/or dissolved matter in a medium. The system collects the matter on a material which is deployed into the medium, and the matter is extracted off the material. If the extracted matter is algae, then it can be processed into end user commercial products such as pharmaceuticals, nutraceuticals, cosmetics, biofuels, food products, crop fertilizer, animal feed and polymers. If the extracted matter is oil or bitumen, then it can be recovered at oil spills or in tar sands. If the medium is infected with a harmful algae bloom of cyanobacteria, then the system could not only harvest the algae for processing but also cut off a food source of the algae by additionally extracting suspended silt. This invention collects matter in an economically and environmentally viable manner.
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Cut fiber 304 or looped fiber 405 ranges in length from 0.25″ to 12″ and more. More preferably, cut fiber 304 or looped fiber 405 is between 0.5″ and 3″, and an example preferred length of cut fiber 304 or looped fiber 405 is 1″. Spacing between a base of any two cut fibers 304 can range from 0.01″ to 7″ and more. More preferably, the spacing is 0.025″ to 1″, and an example preferred spacing distance of cut fiber 304 or looped fiber 405 is 0.05″. If cut fiber 304 or looped fiber 405 is a single filament, then the diameter of cut fiber 304 or looped fiber 405 can range from 0.0001 to 0.10″ and more, and an example of a preferred filament diameter of cut fiber 304 or looped fiber 405 is 0.0004″. If cut fiber 304 or looped fiber 405 is multifilament, then the diameter of that cut fiber 304 or looped fiber 405 is 0.005″ to 2″ and more, and an example of a preferred multifilament diameter of cut fiber 304 or looped fiber 405 is 0.15″. It should be noted that even if a multifilament cut fiber 304 or looped fiber 405 is composed of the same number and size individual filaments, cut fiber 304 or looped fiber 405 can have different diameters due to its method of processing, e.g., spinning, twisting or bunching. A bunched multifilament cut fiber 304 or looped fiber 405 would, everything else being equal, likely have more interstitial voids between fibers than twisted and maybe even more than spun and maybe even more than braided.
Cut fiber 304 or looped fiber 405 is constructed from at least one substance selected from the group comprising polystyrene, polyester, polyamide, polypropylene, polyethylene, vinyl, rayon, cotton, hemp, wool, silk, polyolefins, acrylic, nylon, flax, jute, glass, pina, coir, straw, bamboo, velvet, felt, lyocell, spandex, Kevlar, polyurethane, olefin, polyactide and carbon fibre, any blend of these and/or any recycled products of these, and cut fiber 304 or looped fiber 405, if multifilament, can be constructed from a blend of any of those listed substances. An example of preferable substances is nylon and polyester. If cut fiber 304 or looped fiber 405 is a natural fiber, then it can be manufactured in any process known in the art, such as by opening, carding, drawing, roving, spinning and/or twisting. If cut fiber 304 or looped fiber 405 is made from synthetic fibers, then it can be manufactured in any process known in the art, such as by extruding or spinning.
Cut fiber 304 or looped fiber 405 can be treated or processed to make it more or less oleophilic, oleophobic, hydrophilic and hydrophobic such as by adding or removing polymers known in the art which have the named properties. Examples of materials which are oleophilic comprise polypropylene, polyester, polyvinycholoride, steel or aluminum. Furthermore, materials with a combination of the listed properties is particularly advantageous if the material is preferential such as if a material is both oleophilic and hydrophilic but more oleophilic than hydrophilic. For example, integrating polyester may increase the oleophilic and hydrophilic nature of cut fiber 304 or looped fiber 405, but the cut fiber 304 or looped fiber 405 will be preferentially oleophilic. Although not intended to be limiting, if polyester material is deployed in an oil and water medium, then oil will dominate as collected matter over water; therefore, oil can be removed from the water and stored without removing the water its environment. This advantage increases recovery rate of, e.g., an oil spill in aqueous medium. Furthermore, this permits the use of the material for tar sand or bitumen recovery after, e.g., water or steam is used to bring oil to the earth's surface. An oleophobic material, such as nylon or cotton, can be used to collect matter in a non-aqueous medium, such as oil, to lower levels of matter in the oil.
Cut fiber 304 or looped fiber 405 can be treated or processed to make it more or less conductive, such as by adding carbon or a polymer. Individual filaments of cut fiber can be processed to have any cross sectional shape from a circle, to a W or S shape, to a triangle, to a square, to a pentagon, to a hexagon, to an octagon, to star shaped. An example preferred embodiment is polyester in a circle or nylon in a W shape. Furthermore, individual filaments of cut fiber can be processed to have any longitudinal shape from a hair, to a W or S shape.
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First surface 302 or 402 can be constructed from any process known in the art which would make a planar surface from at least one substance selected from the group comprising polystyrene, polyester, polyamide, polypropylene, polyethylene, vinyl, rayon, cotton, hemp, wool, silk, polyolefins, acrylic, nylon, flax, jute, glass, pina, coir, straw, bamboo, velvet, felt, lyocell, spandex, polyurethane, olefin, polyactide, rubber, Kevlar, metallic mesh, carbon fibre, any blend of these and/or recycled products of these. An example of preferable substances is nylon and polyester. First surface 302 or 402 can be manufactured in any process known in the art, such as by weaving, knitting, tufting, spread tow, felting, thermal or mechanical bonding, extrusion, injection molding, compression molding or stamping.
Although the cut fiber 304 and looped fiber 405 are bound to their respective first surfaces, repeated extraction cycles could cause the fibers to disconnect from the first surface 302 or 402, and such disconnection could be detrimental to a material's collection rate. Therefore, the fibers, such as cut fiber 304 and looped fiber 405, can be further secured to the first surface by way of fiber reinforcement 306 or 406. Fiber reinforcement 306 or 406 are represented as dashed lines, because the fiber reinforcement can be integrated into the first surface 302 or 402, respectively, or on a portion of first surface 302 or 402 which is not visible given the particular view. Alternatively, fiber reinforcement 306 or 406 can be attached to the first surface such that cut fiber 304 or looped fiber 405, respectively, not only intersects the first surface and but also is reinforced by fiber reinforcement 306 or 406, respectively, at substantially the same point in space. Said attachment can occur with bonding by welding, adhering, stitching, laminating or any other process known by a person of skill in the art which can bond two or more surfaces together. Fiber reinforcement 306 and 406 can be manufactured from any synthetic or natural fiber which would increase the number of extraction cycles a fiber can endure without disconnecting from the first surface 302 or 402. An example of a preferred embodiment of a fiber reinforcement is a high twist multifilament nylon strand.
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The example embodiments of a material for collecting matter discussed above have all represented the material as substantially planar; however and as shown in
If the combination of surfaces 10a and 10b form a closed geometric shape, then the internal void defined by the surfaces 10a and 10b can be filled with an object. That object can increase or decrease the buoyancy of the material. For example, a stainless steel cables will decrease the material's buoyancy where as a closed cell polyethylene foam will increase the material's buoyancy. Furthermore, the object can be absorbent such that it will collect matter through absorption in addition to matter collected on material. In an example embodiment, the object is a polypropylene fiber and/or foam and the matter is oil. The closed geometric shape can be formed, e.g., by first taking a planar sheet of material, then folding it over and then joining the edges together. The exact geometric shape of such stitched material takes can be determined by, e.g., the shape of the inserted object. Alternatively, a first or second layer can be processed directly into any geometric shape, open or closed, by any known method in the art, such as stamping, crimping, extruding, injection molding, compression molding. In an example preferred embodiment, surface 10a is a first surface, surface 10b is a second surface. In another example preferred embodiment, a material for collecting matter has a cross sectional geometric shape that is substantially oval.
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Although not intended to be a limiting statement, the matter may collect on the material by at least one process selected from the group of mechanically, chemically and electrically. A mechanical attraction could be, e.g., that a particle of matter becomes entangled by a fiber. A chemical attraction could be, e.g., that a chemical bond forms between a particle of matter and a fiber. An electrical attraction could be, e.g., that a particle carries an electrical charge which is substantially opposite to a charge present on a fiber's surface. Matter may collect on a material in any combination of the aforementioned processes. Large quantities of matter can collect on material in the same manner as small quantities, but collection rate of matter may increase due to agglomeration of matter which may increase the surface area of the material which allows for more points of collection along the material's surface. Agglomeration could overtake other process of collection as a dominate process.
The process of collecting of matter is aided through material selection when considering to the matter, the medium and the material. In an example embodiment, if a material is constructed of an oleophilic substance and matter to be collected is oil or a lipid containing organism, then the matter will be attracted to and collect on the material. In an example embodiment, if a material is constructed of an oleophilic substance with hydrophobic properties and a material to be collected is oil or a lipid containing organism in an aqueous medium, then the matter will be attracted to and collect on the material preferentially over the aqueous medium. Preferred embodiments of oleophilic and hydrophobic substances include polyester, polyethylene and polypropylene. In another example embodiment, if a material is constructed of a light conducting material and the matter to be collected is attracted to light, then the matter might collect on the material at an increased initial collection rate over non-light conducting material. The increased initial rate could quicken the point at which collection is dominated by agglomeration which will increase overall collection rate. An example embodiment of a light conducting material is an extruded polyester fiber which may conduct a light source's rays/beams which may then attract a photosynthetic organism, such as algae.
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Although the following is not limiting to the invention, a difference can occur in collection between different particles of matter. As seen in
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Although not limiting to the invention, an interesting advantage to the current system is what happens to extracted matter as it sits in a container. If a matter is algae and a medium is water, then the algae would be suspended in the water column due to a slight electric charge. After collection and extraction, the material appears to strip the algae of the charge which induces settling inside the container. In one example, algae can settle to the bottom of the container in ten minutes at a quantity which could take several days to achieve by trying have algae settle that is suspended in a water column. If extracted matter, while in a container, settles to the container's bottom, then the remaining water can be used to rinse a portion of material to further aid in extraction. This rinsing, or any other rinsing, can include a high pressure low volume sprayer. This effect is another advantage which permits the current system to reduce costs associated with creating an end user commercial product from algae.
Although not limiting to the invention, it is believed that a majority of collected matter collects on material by mechanical processes; therefore, mechanical extraction—by using a roller or an orifice, or by spinning or vibrating the material, or by using compressed air or water jet to blow or a vacuum to suck off matter—appears to extract a large proportion of collected matter. (A high pressure, low volume water sprayer could also be used to remove the algae. Other means, however, can be used to extract collected matter, such as inducing a charge in the material to cause the material and the matter to repel each other. That charge can, e.g., be applied directly such as by creating a voltage potential, or the charge can occur at the molecular level using substances which create their own charges under specific situations such as exposure to oxygen, chemicals or UV light. Another possible method is through agitation of the material to induce extraction which does not necessarily require contact between the material and a physical device, such as a roller or orifice. Another possible method is through sonication which directs high energy sound waves to extract collected matter. Another possible methods is through extraction using a human hand by forming an orifice with curled fingers.
Systems for collecting matter not previously discussed are detailed in this section.
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A swatch of material 9.84″×39.37″ was cut from cut fiber material made from polyester. The material had a first surface with a thickness of 0.010″. The cut fibers were multifilament bunches having an individual filament diameter of approximately 0.0005″ and a bunch diameter of approximately 0.03″. Spacing between the bunches ranged from 0.05″ to 0.12″. The swatch was folded over into a double sided material and stitched along an edge. Algae were suspended in fresh water medium in a concentration average of 0.056 g/L. Three such swatches were deployed into the medium to passively collect algae for 24 hours. The algae were then extracted from the swatches to form a high concentration extracted algae water mix. The average concentration of the extracted algae water mix was 8.55 g/L which is a concentration increase of 15,267% over the medium's concentration of algae.
A swatch of material 3.93″×15.74″ was cut from looped fiber material made from nylon. The material had a first surface with a thickness of 0.014″. The looped fibers were multifilament winds having an individual filament diameter of approximately 0.003″ and a bunch diameter ranging from 0.25″ to 0.70″. Spacing between the bunches ranged from 0.4″ to 0.65″. Algae were suspended in fresh water medium in a concentration average of 0.1 g/L. Two such swatches were deployed into the medium to passively collect algae for 3 hours. The algae were then extracted from the swatches to form a high concentration extracted algae water mix. The average concentration of the extracted algae water mix was 1.92 g/L which is a concentration increase of 1920% over the medium's concentration of algae.
If a medium has a concentration of matter at 0.5 g/L, then the medium-matter composition is 99.95% medium and 0.05% matter or 1999:1. Obtaining one ton of matter from the medium requires processing nearly 2000 tons of water which is approximately 64,000 cubic feet of water. If extracted matter is 16 g/L, then the medium-matter composition is 98.4% medium and 1.6% matter or only 61.5:1. Obtaining one ton of matter from the extracted matter only requires processing 61.5 tons of water or only 1968 cubic feet of water.
The previously described embodiments of the present invention have many advantages, including systems that satisfy the need for a low initial, operating and downstream cost while being a contaminant free and a non-damaging system for collecting matter suspended and/or dissolved in a liquid medium. Embodiments of the invention do not need to incorporate all advantages that the invention achieves over prior art.
Having shown and described embodiments of the invention, those skilled in the art will realize that many variations and modifications may be made to affect the described invention and still be within the scope of the claimed invention. Thus, many of the elements indicated above may be altered or replaced by different elements which will provide the same result and fall within the spirit of the claimed invention. It is the intention, therefore, to limit the invention only as indicated by the scope of the claims.
This application claims the benefit of and priority to U.S. Provisional Patent Applications (1) 61/355,990 filed on Jun. 17, 2010 and naming inventors Youngs and Cook, and (2) 61/355,969 filed on Jun. 17, 2010 and naming inventors Youngs and Cook; the contents of both Applications are incorporated by reference as if fully reproduced below.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/US2011/040804 | 6/17/2011 | WO | 00 | 12/17/2012 |
Number | Date | Country | |
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61355969 | Jun 2010 | US | |
61355990 | Jun 2010 | US |