139results about How to "Reduce water pollution" patented technology

The invention relates to a lLitopenaeus vannamei compound feed and belongs to the field of shrimp feed and preparation methods thereof. According to weight percentage, the compound feed contains 10-15percent of fish meal, 18-22 percent of fermented soybean meal, 8-12 percent of peanut cake, 2-6 percent of corn protein powder, 8-10 percent of soya bean meal, 20-25 percent of high gluten flour, 2-6percent of shrimp shell powder, 1-3 percent of selenium-enriched yeast, 1-3 percent of bentonite, 2-4 percent of squid extract, 2-4 percent of kelp powder, 0.5-1.5 percent of monocalcium phosphate, 0.5-1.5 percent of fish oil and 2-4 percent of premix. The compound feed can substitute for the present prawn compound feed and be used for the artificial breeding of litopenaeus vannamei. The compoundfeed is good in palatability, easy to digest and absorb and nice in the stability in water, reduces feed coefficient and cost, nitrogen and phosphorus emission and pollution to the water body environment of culture zones, and can promote the growth of prawn, with balanced nutrition.

The present invention relates to a laboratory incubator, more particularly, a gassing incubator, comprising an outer housing incorporating a door and an inner housing surrounding an internal chamber, which comprises a floor, a ceiling, three side walls and a lateral surface that is capable of being closed by said door or by an additional, inner door, and in which a flow channel is present, which comprises at least one air inlet opening in an end region and at least one air outlet opening in a different end region, wherein said at least one air outlet opening is formed such that effluent air is guided along at least one of the side walls and/or the lateral surface in the peripheral region of the internal chamber, and wherein a water reservoir capable of being heated is disposed within the flow channel such that air flowing in the flow channel is passed across or through said water reservoir.

The invention discloses a pond poly-culture method for tilapia mossambica and litopenaeus vannamei. The pond poly-culture method comprises the following steps of: adding quick lime into a dry pond in spring every year, injecting water to carry out water sterilization, adding 50 kg-100 kg of fermented chicken manure into each mu of the pond when the water temperature is stabilized to over 20 DEG C, injecting water until water depth is 40cm-60cm, waiting for 1-2 weeks, adding 8000-12000 litopenaeus vannamei shrimp seeds into each mu of the pond, and feeding special poly-culture feed; injecting water after 15-20 days until water depth is 100cm-120cm, adding 1500-2500 tilapia mossambica fries into each mu of the pond, feeding the poly-culture feed, injecting water after 15-20 days until water depth is 200cm-250cm, oxygenating for 3-7 hours every day, and mixing 20kg-30kg of the quick lime with water to spray for each mu of the pond once to twice every month; catching the tilapia mossambica and litopenaeus vannamei after 120-150 days. According to the pond poly-culture method disclosed by the invention, the special poly-culture feed is fed, prawn quality is high, water pollution is less, management is easy, cost is low and benefits are high.

The invention relates to a factorized totally-closed circulating aquaculture system of sea cucumbers, belonging to the technical field of aquaculture. The factorized totally-closed circulating aquaculture system comprises a special culture pond and a water treatment system; the special culture pond is a circular bead pond of which the bottom is shaped as a pan bottom, a water outlet is formed in the lowest position of the center of the special culture pond, and three to five circles of porous bottom flushing pipes are horizontally paved at the bottom of the pond; the water treatment system comprises a slow flow settling pond, a pump pond, a water lifting pump, a protein foam separator, a first-stage pollution cut biopurification pond, a second-stage degassing biopurification pond, a steam water convection oxygenation pond and a pipeline type ultraviolet sterilizer. The culture system suitable for factorized totally-closed circulating aquaculture is designed according to the biological characteristics of sea cucumbers and an aquaculture water circulation utilization technology; the daily supplement of new water is less than 5 percent during culture by using the system disclosed by the invention. Compared with a traditional water change or running water culture method, the system disclosed by the invention has the advantages that the water saving amount reaches over 95 percent; more importantly, the temperature control energy consumption in the culture process is greatly reduced and the energy is saved by over 70 percent.

A microgranular bait for the fry of Epinephelus is prepared from crude protein, crude fat, phosphatide, ash, n-3HUFA, DHA/EPA, DHA, and EPA according to a certain proportion through enzymolyzing by proteinase, further adding antioxidizing agent, filtering, and spray drying. Its advantages are rich nutrients, and low settling speed.

A combination one or more species of lactobacillus bacteria and one or more types of fibrolytic enzymes can be used to replace animal protein in cattle feed. The combination results in a better amino acid balance in the digestive tract of cattle resulting in a better utilization of nitrogen. Less water-soluble nitrogen compounds pass through the digestive tract resulting in less pollution. More nitrogen in the feed is converted to water insoluble compounds resulting in better feed utilization and less water-soluble pollution in the manure. The diseases carried by some animal protein additives, such as “mad cow” are not present in the additives of the present invention.

The invention is a sinkable bulked granular river-crab feed and its making method, additionally arranging a variable-frequency speed regulator on the main electric machine of an ordinary screw squeezer to regulate the speed of the screw, combining with related control process conditions, making better waterproof sinkable bulked granular river-crab feed. According to the nutrition needs of the river crabs, it selects and compounds fish meal, soybean dregs, wheat and other raw materials, and makes it by the working procedures of micro-crushing, mixing, regulating quality, extruding, drying and cooling, etc and by the control of the conditions of crushed particle size, material water and temperature after quality-regulating, the screw speed of the squeezer, segment barrel temperature, etc. It has good waterproof property, high gelatination degree, very quickly absorbs water to turn soft after entering in water, suitable for the river crabs to ingest.

The invention provides a method for the production of electrical energy from an ammonium (NH₄⁺) containing aqueous liquid comprising (a) separating at least part of the ammonium as ammonium salt or concentrated ammonium salt comprising solution from the ammonium containing aqueous liquid, (b) decomposing at least part of the ammonium salt or salt solution into an ammonia (NH₃) comprising gas and one or more other decomposition products, and (c) feeding at least part of the ammonia comprising gas to an fuel cell.

The invention provides a green ecological highly-efficient grass carp and river snail mixed culture method comprising the steps of selecting a place and building a pond, disinfecting and fertilizing the pond, putting fries in the pond, feeding grass material to the fries, decontaminating the pond and preventing diseases, and catching products. In the method, only green grass is fed and no other fodder is fed, and excrement discharged by grass carps after the grass carps eat the green grass is best-quality fodder for river snails, so that water quality pollution is greatly reduced, fodder waste is reduced, the culture cost is reduced, the yield of grass carp and river snail breeding is increased, the quality of grass carps and river snails is improved, and the production benefit, the economic benefit and ecological benefit are increased.

The invention relates to a method for recycling carbon fiber wastewater, comprising the following steps: firstly, pretreating the carbon fiber wastewater, then carrying out biochemical treatment on the pretreated carbon fiber wastewater which enters into a biochemical system, then processing the wastewater subject to biochemical treatment by an integrated process formed by an ozonation reactor and a biological activated carbon (BAC) filter, and removing a majority of salt ions by an ultrafiltration and reverse osmosis desalting system. After the wastewater is processed by the method, the recycled water can be applied to industrial production, thus providing an open source for carbon fiber industrial water, reducing water body pollution and improving ecological environment.

The invention discloses an aquaculture net cage with double-layer nets. The aquaculture net cage comprises net cage bodies, a net line and float bowls and is characterized in that the corresponding double-layer net are respectively arranged on the periphery and the bottom surface of each net cage body; the inner layer of each double-layer net is a large-mesh net and the outer layer of each double-layer net is a small-mesh net; protective guards are also arranged above the net line and the float bowls and on the periphery of each net cage body; an isolating net between two or more connected net cage bodies is a large-mesh net. The aquaculture net cage disclosed by the invention is simple in structure and easy to manufacture and has the advantages that juvenile fish to big fish can be cultured in one net cage without replacing the net cage, so that feeds for fish are saved, the net cage culture cost is reduced, the water pollution outside the net cage is reduced, and the aquaculture net cage is convenient to manufacture.

The invention provides a method for producing traditional liquor by a solid and liquid process. The method comprises the following steps of a, coarsely crushing sorghums, barley, wheat, corns, rice, millets, glutinous rice, sweet potatoes or peas as raw materials, adding water in an amount which is 40 to 70 percent based on the weight of the raw materials to wet the grains, adding rice husks in an amount of 4 to 12 percent based on the weight of the raw materials for material steaming at the same time of grain wetting, and performing mixing and cooling to prepare fermented grains according to the ratio of the wetted materials steamed with the rice husks to liquor vinasse of 1:1 to 1:3 in parts by weight; b, after the temperature of the fermented grains in step a is reduced to 30 to 40 DEG C, adding traditional yeasts in an amount of 20 to 40 percent based on the weight of the raw materials and yeast mouldy bran in an amount of 2 to 8 percent based on the weight of the raw materials, and feeding the fermented grains into a vat for fermentation after uniform mixing; c, loading the fermented grains which are fermented and taken out of the vat in step b in liquid fermentation equipment, adding water in an amount which is 1 to 5 times that of the fermented grains, performing uniform stirring and intermittent ventilation stirring, and performing fermentation for 30 to 40 days; d, after fermentation in step c, performing demixing and distillation to obtain raw liquor, and storing the raw liquor; e, filtering liquid fermented broth after distillation, delivering the 50 to 75 percent of solid vinasse to step a to prepare fermented grains as liquor vinasse, and delivering filtrate to step c as process water.

The invention discloses a preparation method of plastic-biomass active carbon and prepared active carbon thereof. The method comprises the steps of crushing and mixing raw materials, forming particles, activating, washing with acid and drying. Through the preparation method, waste recycled plastics, biomass materials and solid activating agents are prepared into plastic-biomass active carbon. Compared with the prior art, the preparation method of plastic-biomass active carbon has the advantages that a novel path of recycling and reusing urban and rural garbage, the water pollution caused by chemical reagents is greatly reduced, and the resources are saved; the prepared formed active carbon has a larger BET specific surface area and a high iodine sorption value, shows abundant pore structure and has a great market application prospect.

The present invention is directed to a device for drying waste in a continuous cyclic process. The invention is further directed to a method for drying waste in a continuous cyclic process in the device of the invention, wherein the raw waste entering the system is at a vast range of moisture contents between 99% and 75%.

The invention relates to an automatic identification and locating method for leakage of a water supply network, and belongs to the technical field of leak monitoring of the water supply network. The method comprises the following steps of acquiring the physical states of limited pipe sections which are independently metered in the water supply network by using sensors; recording the leakage statesand positions of the pipe sections; establishing, training and testing a deep neural network; identifying the leakage state of a complex water supply network by analyzing data of a few sensors; and specifically locating water pipe sections with leakage. The method provided by the invention is implemented by specific steps, and the result is stable and reliable by means of an accuracy test method,so that the method has high feasibility. When the method is used for monitoring the water supply network, the identification and locating of the leakage of the entire water supply network can be realized with a limited number of sensors, so that the monitoring cost is low, and the monitoring accuracy is high. Moreover, the repair for the leakage of the water supply network can be accelerated greatly, and the water resource loss, resource waste and water quality pollution caused by leakage are lowered.

The four-in-one appliance combining water heater, drinking water machine, air conditioner and refrigerator has a total power of 330 W. In the four corners of refrigerator, there are four water storing and condensating exchangers, and in the condensator, water absorbs the heat to raise refrigerating efficiency. Warm water of 40-50 deg.c may be used in washing dishes, washing clothing and bathing; and hot water of 70-80 deg.c may be filtered before being used in cooking rice and making tea and coffee, serving as water heater and drinking water machine. The evaporator and heat conducting board are fixed together for absorbing heat, serving as refrigerator. There is cold air passage opposite to the cold storage chamber to cool air and the cold air is exhausted, serving as cooling air conditioner. The present invention makes it possible to eliminate air pollution, heat island effect, water pollution and water deficiency.

The invention discloses a pore shaft water supply filter assembly and a filter system. A filter layer of the pore shaft water supply filter assembly is a filter material which surrounds outside an inner cylinder body to be folded into a wave shape, a pore shaft is arranged outside each folding point of the filter material, which is adjacent to the inner cylinder body, the axial line of each pore shaft is parallel to the axial line of the inner cylinder body, each pore shaft is a pipe body, and all hinges of the filter material are tightly wound on a combination body of the inner cylinder body and all pore shafts along the same direction. According to the filter system, a plurality of filter assemblies are adopted. The filter material is supported by the pore shafts to form an arc surface, clear water of concentrated water, which is filtered from the arc surface, enters the inner cylinder body, and the filter material has no bevels in the arc surface without forming dead angles or causing impurity accumulation or blocking a filter layer; and during backwashing after filtering, a cleaning solution enters the pore shafts from the inner cylinder body through the arc surface of the filter material, so that impurities on the filter layer can be easily washed out and can be discharged out together with the cleaning solution.

The present invention relates to one kind of modified methyl cellulose flocculant for underwater grouting mortar, cement slurry and concrete. The modified methyl cellulose flocculant is methyl cellulose-acrylamide copolymer prepared through polymerizing methyl cellulose and acrylamide while introducing nitrogen and adding potassium persulfate, ferrous chloride or ammonium persulfate. The modified methyl cellulose flocculant may have amido sulfate-formaldehyde condensate, polycarboxyl acid sulfidizer and melamine-formaldehyde condensate added. The modified methyl cellulose flocculant makes the underwater grouted mixture possess excellent antidispersivity and result in less water pollution and less strength loss.

The invention discloses a premix for laying ducks. The premix comprises the following components: 5-17.5 percent by weight of lysine, 2.5-10 percent by weight of methionine, 1-5 percent by weight of threonine, phytase with the enzyme activity of 15-25U in each gram of the premix, xylanase with the enzyme activity of 50-100U in each gram of the premix, bacillus subtilis with the bacterial colony forming number of 0.5*10<8>cfu-1.5*10<8>cfu in each gram of the premix, and the balance of carriers. The formula of the premix is designed by a low-protein amino acid balancing technology and a proper amount of the phytase, the xylanase and the bacillus subtilis are simultaneously added, the nitrogen and phosphorus utilization rate is improved, the nitrogen and phosphorus emission is reduced, and the pollution of the premix to the surrounding water areas of a culturing farm is obviously reduced. By feeding the laying ducks with feed added with the premix, the nitrogen and phosphorus utilization rate of the laying ducks is improved and the nitrogen and phosphorus emission of the laying ducks is reduced under the condition of guaranteeing the healthy and normal production of the layering ducks, wherein the nitrogen emission is reduced by 30-35 percent, the phosphorus emission is reduced by 25-35 percent; and the invention has obvious economical and environmental benefits.

The invention relates to a method for safely removing algae and settling algae based on sepiolite, wherein united algae removal is carried out by taking potassium permanganate, 30-60-mesh sepiolite and chitosan as algicide. The implementation method comprises the following steps: inputting a certain amount of potassium permanganate into an algae polluting water body for pre-oxidizing for 15-300 minutes; dissolving chitosan by hydrochloric acid or acetic acid, then, adding the chitosan liquor and sepiolite into the oxidized algae polluting water body, wherein algae flocculate and agglomerate within 360 minutes and submerged to water bottom, and the water quality is clear. The inputting amounts of potassium permanganate, sepiolite and chitosan are as follows: 0.01mg/L-0.5mg/L of potassium permanganate, 10mg/L-50mg/L of sepiolite and 1mg/L-5mg/L of chitosan. The method is not only less in water quality pollution, safe and reliable, fast in algae removal, thorough in algae removal and small in use level of the algicide, but also enablessubmerges the flocculated algae to be submerged to the water bottom to maintain a clean a water surface without affecting normal operation and attraction of the water surface, so that the method is applicable to algae removal on the water surfaces of lakes, reservoirs and park landscapes.

A shield for protecting a plant having; a stem having an upper end and a lower end; a first plurality of sticks having a proximal end and a distal end; and a pad associated with the upper end of the stem, the pad having a second plurality of holes distributed all around the pad and oriented at various angles in relation to a horizontal plane, the holes being configured for removably receiving the proximal ends of the entire first plurality of sticks or a portion thereof and securing the same therein through friction-based insertion; the second plurality of holes distribution and orientation allowing the formation of a support structure for a protective cover in which the entire first plurality of sticks or a portion thereof extends in a circular arrangement above the plant at an angle conforming to the shape or size of the plant.

Retaining supporting is provided to reduce water pollution caused by coffering work and to increase economical effects, by achieving a coffering effect by a closed space. In retaining supporting, a steel pipe sheet-pile(1) is used as a supporting unit member. In the steel pipe sheet-pile, steel pipes(2) arranged parallel are integrally interconnected by an H-steel connection member(4) the edges of which are combined to the peripheral surface of each steel pipe and a connection part(3) is arranged to the steel pipe. The supporting unit members are horizontally connected by mutually combining the connection parts, to form a retaining wall. Supporting unit members vertically arranged are interposed at suitable intervals to make the connection members and steel pipes arranged in the rear of the retaining wall.