43 results about "Raceway pond" patented technology

The present invention relates to a method of manipulating the physiological state of algae cultured in raceway ponds by altering one or more environmental parameter to simulate algal bloom forming conditions and to raceway ponds suitable for culturing algae according to the present invention. The alteration of the one or more environmental parameters in a specifically timed manner can be used to induce and maintain synchronous cell division.

A raceway pond for circulating microalgae in a fluid medium includes a plurality of interconnected channels. Each channel is straight and has a structured gradient, due to tilt or terracing, that moves the fluid medium along the raceway. In operation, the concentration of microalgae in the fluid medium is maintained substantially constant, and the depth of the fluid medium in the raceway is maintained below a pre-determined level.

The invention provides a photobioreactor for a raceway pond. The photobioreactor comprises the raceway pond (1), a variable-speed stirring system, a carbon dioxide supply system (4) and a ground temperature control system. Compared with the prior art, the photobioreactor has the advantages that firstly, a variable hydraulic stirring system is introduced into the reactor, so as to be suitable for cultivation of microalgae with different mechanical resistance types; secondly, compared with the traditional motor, one hydraulic stirring system can drive multiple raceway ponds to realize large-scale application, so that the investment cost and the operating energy consumption can be greatly reduced; thirdly, the reactor is additionally provided with the carbon dioxide supply system and a gas refining device is arranged at the tail end of the carbon dioxide supply system, therefore, the detention time of carbon dioxide in water is prolonged and the utilization rate of the carbon dioxide by microalgae is improved; fourthly, a plastic film is arranged at the top of the raceway pond, so that the external pollution probability is reduced; and fifthly, the novel cyclic temperature control system is adopted, so that the cultivation time of the microalgae in winter and summer is prolonged and the energy consumption of the reactor is reduced.

The invention discloses an electric flocculation and air floatation combined continuous microalgae harvesting device and method. The device comprises an electric flocculation and air floatation zone, a harvesting zone, a water outlet zone and an air flocculation zone which are connected sequentially. A mixture of an algae solution and bittern water flows through a raceway pond to be sufficiently mixed and enters a deep groove in the tail end of the raceway pond; to-be-harvested algae is pumped from an algae solution inlet, lifted to a electrolysis plate and flocculated by hydroxide colloid, released by an electrode, of iron; flocculated and agglomerated microalgae cell clusters are adsorbed to float upwards by microbubbles released by a dissolved gas release port, are prompted to be further agglomerated, flow into the harvesting zone, are scraped into an algae storage tank by an algae scraping machine and are sent to a dehydration drying procedure; clear water at the bottom of the harvesting zone enters the water outlet zone through a gap below a baffle II. The harvesting efficiency of microalgae is greatly improved; the device needs few investments, occupies a small area, is simple to operate, has the advantages of low energy consumption, high efficiency and environmental protection and is suitable for large-scale production.

The invention provides a multilevel large capacity tank-type photobioreactor capable of inhibiting growth of microalgae on wall. The photobioreactor is in a shape of a right trapezoid, and comprises three levels in structure, according to different lighting. The top part is an open raceway pond model; and an air area between the top liquid surface and the reactor prevents growth of microalgae on wall. An inwardly penetrated part of an inclined plane of the trapezoidal structure is in a flat reactor structure pattern; bottom of the area is provided with a gas distribution plate; and during aeration, bubbles rise along the inclined plane to inhibit attachment of the microalgae on the wall. The top of the inclined plane is provided with surface wall cleaning device, which is used for cleaning inner wall of the reactor with a vertical surface. A cold light source is arranged on the position unreachable by incident natural light in the reactor, and the cold light source is provided a transparent lampshade with micropores on the wall thereof; an air inlet pipe is arranged on the external end of the lampshade, so as to introduce air into the lampshade for wall surface aeration, and prevent attachment of the microalgae on the wall. The reactor greatly increases cultivation scale, as well as inhibits growth of microalgae on wall, and realizes long-time microalgae cultivation with high efficiency.

The fully enclosed floor heating microalgae breeding system for a track pool relates to a fully enclosed floor heating microalgae breeding system which uses groundwater, solar energy, etc. to adjust the temperature and temperature of the water environment of the track pool. A fully enclosed floor heating runway pool (13) is adopted, and heat exchange pipes (12) are laid under the pool to connect a hot water device and a cold water device respectively. The hot water device is formed by series connection of the heat preservation water tank (4), the water heater, the first water pump (17), and the underground return pool (3) through water pipes. Cold water device is made of second water pump (7) and underground water well (8) and water pipe. Use solar collectors to provide hot water, and provide heat source for the circulating water in the runway pool in low temperature weather; use groundwater to cool down the circulating water in the runway pool in high temperature weather, and has the characteristics of underground and closed, can obtain constant ground temperature, and effectively prevent Heat dissipation and water evaporation can achieve all-weather factory production throughout the year, and has the positive effects of simple structure and low cost.

A system for growing an algal culture to create a biomass includes a plurality of linearly interconnected, sloped-gradient, gravity-driven, raceway ponds. Surface areas of the ponds are sequentially increased in accordance with a multiplier, with the pond surface area of the last raceway pond in the sequence being as large as fifty acres. For the present invention, a fluid transfer system connects each raceway pond with every other raceway pond in the system. Control over each individual raceway pond is provided to monitor and evaluate algal culture in the pond. Based on this evaluation, the fluid transfer system is activated to provide water, nutrients and other additives to maintain predetermined growth parameters for algae in each of the raceway ponds.

The invention discloses a green healthy controllable industrial prawn culture method. The method includes the steps of establishing an indoor circulating water treatment culture system, culturing beneficial microbial communities to enable the same in a raceway pond to reach the density enough to inhibit harmful vibrios, releasing young prawns, feeding different kinds of bait correspondingly according to the prawn sizes in different periods during culture, strictly detecting data change of water quality indexes every day, making a water transfer scheme, randomly detecting prawn bodies and the vibrio number in a water body once every three days, and making a microbial liquid concentration adjusting scheme according to the change so as to inhibit microbes by microbes. The green healthy controllable industrial prawn culture method has the advantages that a circulating water system is used for filtering large-particle organic matter and controlling nitrite in culture water, excrement and residual bait are decomposed and treated by the beneficial microbial communities, forbidden drugs such as antibiotics are not added in the whole process, zero water change and drainage is achieved, and accordingly the method is lower in environmental pollution, saving in water resource, short in culture cycle, high in profit level and capable of obtaining healthy pollution-free prawns.

The invention discloses a photosynthetic organism culture apparatus. A culture zone (1) arranged toward an illumination direction (D) is formed in the culture apparatus, the culture zone is used for accommodating a culture solution containing photosynthetic organisms, the culture apparatus comprises a flow disturbing mechanism and a driving mechanism (2) thereof, and the flow disturbing mechanism can be driven by the driving mechanism to move in the culture zone in order to guide the culture solution to flow along the illumination direction. In the prior art, a culture mode is characterized in that an alga liquid is completely driven through a paddle wheel (raceway pond) or a cycle water pump (closed photobioreactor) to flow; and in the invention, the movement of the flow disturbing mechanism positioned in the culture zone is adopted to drive the culture solution to move back and forth in the culture apparatus along the illumination direction in order to make cells of photosynthetic organisms intermittently move to the surface of the culture solution and be exposed to light, so a very ideal culture effect is reached, and the energy consumption is greatly reduced.

The invention discloses an intensive cultivation method of shrimps in a raceway pond, which comprises that a tubular hydraulic drive device of a raceway shrimp pond is used for cultivation, wherein the raceway shrimp tubular hydraulic drive device comprises an annular raceway pond; ()is disposed along the cross section direction of raceway pond inside the annular raceway pond; jet flow holes with the same facing direction are disposed horizontally in a pipe network; the pipe network is connected to a water pump; when oxygen is insufficient, air supply and oxygen addition are directly realized to the jet flow holes of the pipe network through an external air source; and when the oxygen is sufficient, water flows containing the oxygen are provided to the pipe network by the water pump. Water is pumped into the pipe network by the water pump and jet flows are formed by the jet flow holes, so that water bodies are driven to move in the raceway pond. Switchable control of air flows and the water flows containing the oxygen make production very convenient. In this way, the intensive cultivation method of the shrimps in the raceway pond provided by the invention is advantageous in convenient management, quick operations, low cost, the oxygen addition, motivation in directional flowing of the water flows, small energy consumption, good oxygen addition effect, energy saving, emission reduction, a self-cleaning function, and applicability to seedling growing and adult formation.

The invention discloses a raceway pond microalgae reactor for realizing frequency-division uniform distribution of sunlight by utilizing nano light guide plates. The reactor comprises a raceway pond middle baffle wall arranged in the reactor. The reactor is characterized in that a plurality of light channels are formed in a flow channel around the raceway pond middle baffle wall in the reactor; each light channel is formed by stacking a sunlight condenser, a band-pass filter and a nano light guide plate, wherein the band-pass filter is arranged between the sunlight condenser and the nano light guide plate; the nano light guide plate is longitudinally inserted in the raceway pond microalgae reactor, and the front surface of the nano light guide plate corresponds to the raceway pond middle baffle wall; a reflective film is arranged at each of the bottom of the nano light guide plate and the upper parts of the front and back surfaces of the nano light guide plate; and a plurality of aerator pipes are dispersedly arranged between every two adjacent channels in the bottom of the reactor. According to the raceway pond microalgae reactor, light energy is provided for the growth of microalgae by utilizing emergent light of the nano light guide plates; and the reactor can be widely applied to the fields of biology, environmental protection, energy and the like.

The invention provides a method for promoting rapid accumulation of astaxanthin in haematococcus pluvialis. The method comprises the following steps: collecting haematococcus pluvialis cells in a post-log phase and/or a platform stage; keeping humidity of the haematococcus pluvialis cells at 70-97%; and accumulating the astaxanthin under the condition of illumination. By the method, rapid accumulation of the astaxanthin is promoted, and the shortcomings that a traditional raceway pond production mode is restricted by solar radiation and weather conditions, the accumulation period of the astaxanthin is long and the like can be overcome. By the technical method, the astaxanthin in the haematococcus pluvialis not only can be accumulated in the open air, but also can be accumulated under an artificial light source, and restriction of the weather conditions is solved.

The invention provides a coal-to-methane produced carbon dioxide immobilizing method. The coal-to-methane produced carbon dioxide immobilizing method comprises the following steps of S1, preprocessingcoal-to-methane produced carbon dioxide gas to obtain liquid carbon dioxide; S2, supplying the liquid carbon dioxide to microalgae; S3, absorbing the carbon dioxide through the microalgae. The invention meanwhile provides a coal-to-methane produced carbon dioxide immobilizing system. The coal-to-methane produced carbon dioxide immobilizing system comprises a carbon dioxide preprocessing system, acarbon dioxide supply system connected with the carbon dioxide preprocessing system, and a carbon dioxide absorbing system connected with the carbon dioxide supply system. The coal-to-methane produced carbon dioxide immobilizing method and system is particularly applicable to immobilizing carbon dioxide in gas with a concentration of carbon dioxide higher than 60%, and is low in energy consumption, high in carbon immobilization rate and free from in situ carbon immobilization; on the basis of ensuring no reduction of growth amount of the microalgae, the coal-to-methane produced carbon dioxideimmobilizing method and system achieves a carbon immobilization rate of 95-100% of closed type raceway pond microalgae and 65-70% of open type raceway pond microalgae.

The invention provides a microalgae large-scale culture device suitable for improving carbon fixation efficiency. The microalgae large-scale culture device comprises a raceway pond provided with at least one raceway and a stirring paddle mounted in the raceway pond, wherein the stirring paddle is mounted at one end of the raceway, and algae liquid in the raceway flows through the rotation of the stirring paddle; the microalgae large-scale culture device is characterized by further comprising a plurality of transparent cover plates; the transparent cover plates are discontinuously distributed above the raceway; the bottoms of the transparent cover plates are in contact with the upper surface of the algae liquid. Gas-liquid-cover contact is realized, the gas-liquid contact time is prolonged, and the CO2 dissolving efficiency is improved. An aeration unit in the raceway pond can generate small air bubbles, and the generated air bubbles are not aggregated, so that the CO2 dissolving efficiency is improved; meanwhile, the aeration unit also has the characteristics of smoothness and uneasiness of being blocked, crushing resistance and uneasiness of being crushed; the aeration unit is low in manufacturing cost and easy to mount and maintain, and multi-point discontinuous arrangement can be realized in the raceway pond for large-scale culture.

The invention discloses a desert biodiesel producing microalgae large-scale semi-continuous culturing method. According to the desert biodiesel producing microalgae large-scale semi-continuous culturing method, culturing in small raceway ponds and large raceway ponds is realized, semi-continuous culturing in 200m<2> raceway ponds is realized via grade-by-grade (1 to 3 grades) amplified cultivation, and one batch of biodiesel producing microalgae can be harvested in 2 to 3 days. The desert biodiesel producing microalgae large-scale semi-continuous culturing method is capable of shortening culturing period obviously, and increasing efficiency; semi-continuous culturing grease yield in 200m<2> raceway ponds is as high as 5.43g/m<2>d; and grease yield is increased greatly. The desert biodiesel producing microalgae large-scale semi-continuous culturing method is especially suitable for desert areas, full utilization of desert idle lands can be realized; cost is reduced; and full utilization of resources is realized.

The invention belongs to the field of photobioreactors, and particularly relates to a simple raceway pond used for microalgae cultivation and a use method thereof. The simple raceway pond comprises araceway pond lining and a raceway pond frame, wherein the raceway pond frame comprises a straight runner wall, a bent runner wall, a flow separating wall, stirring paddles, a variable speed motor, a support rod and a liquid propeller, wherein the straight runner wall, the bent runner wall and the flow separating wall form a circular water pond frame of the raceway pond. The raceway pond frame is easy to construct and is firm, is convenient to disassemble, and can be enlarged easily, and the corresponding size can be determined according to actual site. The raceway pond lining is of a completesleeve structure, cannot wrinkle during use, does not need to be splice, can effectively avoid liquid leakage, and is made of food-grade materials, so that the risk of heavy metal pollution caused byadopting cement or a geomembrane can be avoided. The liquid propeller can be matched with the stirring paddles to be used, has the characteristics of obviously reducing the liquid mixing energy consumption, and meanwhile can avoid algae cell settlement, so that the area yield can be increased.

The present disclosure relates to a photobioreactor system. Algae for using producing alternative energy is typically grown using circular raceway ponds, tubular photobioreactors, and/or ultracompact waveguide photobioreactors. These methods require a supply of conventional energy for mixing, pumping fluids, distributing light, and/or other operations. The conventional energy required for these algae growth methods is high compared to the alternative energy eventually harvested from a particular system. Thus, the energy return on investment for these systems is low. The present photobioreactor system facilitates passive fluid flow through growth chambers. The passive fluid flow may be caused by gravity. Advantageously, the present system may decrease the energy costs of cultivating algae and/or other biomasses using photobioreactors because the present system requires little to no power for operation. In some embodiments, the present system may comprise growth chambers, an influent device, an effluent device, a support structure, and/or other components.

The invention discloses a tribonema culture device and method. The culture device comprises a raceway pond, circulating water wheels, a carbon supplement device and hairbrush strips; the raceway pondis of a long circular shape, one circulating water wheels is arranged at each of the two ends of the raceway pond, the hairbrush strips are liftably arranged in the raceway pond, so that tribonema adheres to the hairbrush strips to grow, the rotation speed of the circulating water wheels is 7-8r/min during cultivation, tribonema on the hairbrush strips is harvested by adopting a mode of scissor cutting after growing to the required length, and the length of remaining tribonema extending from the hairbrush strips is kept at 10mm or above after tribonema is harvested, thereby achieving the low-cost and high-density cultivation of tribonema, the produced tribonema is easy to separate and collect, the manpower is saved, the tribonema can be repeatedly cultured, the industrial amplification isfacilitated, and the method is suitable for lager-scale industrial production.