361results about How to "Prevent acidification" patented technology

The invention relates to a method for carrying out anaerobic digestion on kitchen waste after heat-moisture treatment, belonging to the technical fields of harmless resource treatment and disposal of solid waste. The method comprises the following steps of: pre-treatment, high-temperature heat-moisture treatment, de-oiling, anaerobic digestion, biogas residue dehydration treatment of the kitchen waste, and the like. The method disclosed by the invention has the following advantages that: (1) the kitchen waste ia sterilized before the anaerobic digestion; (2) the kitchen waste can be effectively de-oiled and the occurrence of oil acidification is prevented so that the follow-up anaerobic digestion process is more stable and the oil recovery is improved; and (3) salt content in the kitchen can be effectively desalinated so that the salt content in the biogas residue is decreased and the treated kitchen waste can be used as a good soil conditioner.

The invention discloses a method for recovering vegetation on a strong-acid tailing waste land without soil. The method is characterized by comprising the following steps: A. performing early-stage preparations, and draining off water; B. changing the pH value of the land; C. culturing the fertility of the tailing waste land; D. screening and culturing plant varieties; and F. managing transplanted seedlings. The method has the advantages that by adopting the method for recovering the vegetation without soil, disturbance to the tailing land is reduced, and the purposes that water can be drained off, the influence of acid water to the vegetation can be alleviated, the heavy metals can be stabilized, and the living environment of plants is improved are achieved. In addition, according to the method, the cost is low, the effect taking is rapid, the effect is good and the operability is high.

The invention relates to the technical field of irrigation, and discloses an intelligent sprinkling irrigation system with integration of water and fertilizer and a control method thereof. The systemcomprises a detection sub-system, a control sub-system, a fertilizer mixing sub-system and an irrigation sub-system, wherein the detection sub-system comprises a crop body sensor, a soil moisture content sensor and a soil fertility sensor; the control sub-system comprises a first receiving module, a calculation module and a comparison prewarning module; and the fertilizer mixing sub-system comprises a fertilizer mixing device. The method comprises the steps of system debugging preparation, information collection, actual demand calculation, water-fertilizer proportioning and irrigation. According to the system and method, the growing period of crops can be actively analyzed, fertilization and irrigation are provided by combining the regulation of water and fertilizer requirement of crops indifferent growing periods, abnormal growth of crops can be actively found, and administrative staff is informed; and after long time of use, pipelines of the irrigation sub-system are not easily blocked, the content of nitrogen, phosphorus and potassium of liquid remained after irrigation can be tracked, and reclaimed residual liquid does not need independent treatment during recycling, so that recycling can be convenient.

The invention discloses a method for improving heavy metal-polluted soil, which comprises the steps of: (1) modifying the heavy metal-polluted soil; (2) adding soil conditioner into soil; and (3) covering the soil, evenly mixing, and balancing for 0-6 months. The method restrains the oxidation of matrix by reactions such as absorption, chelation and complexation, and the like, fixes the heavy metal ion, reduces the biological toxicity of the soil, and reduces the diffusion and the leakage of the heavy metal ion to periphery soil or water. The method has low investment cost, can not break the structure of the soil, and is easily preformed.

The present invention relates generally to a device for manufacturing organic compost from human excrements in a toilet to automatically transform human excrements into organic compost. More particularly, the present invention comprises a transport belt installed under a seat disposed on a main body of a toilet, capable of transporting excrements; a stirring room mixing with a stirring blade the excrements transported by the transport belt; a microorganism hopper installed on the upper side of the stirring room, feeding microorganisms into the excrements stirred in the stirring room; a muck collector receiving and storing the excrements crushed in the stirring room; a liquid collector receiving and evaporating urine fallen from the transport belt; an air purifying room drying excrements and urine in the main body, purifying and discharging air through an exhaust pipe; and a controller installed at a side of the main body, controlling electrical operation of the above components. The device for manufacturing organic compost from human excrements in a toilet according to the present invention has advantages that water consumption in the toilet is reduced, contamination of water and environment is reduced since excrement treatment / purifying facility is not required, and organic compost for planting crops is also supplied.

The invention discloses a repairing method for a damaged casing pipe of an oil-water well and belongs to the field of oil production engineering of oil industry. The method comprises the following steps: preparing a well: taking a production tubular column out of the well; measuring the damaged position of the casing pipe; scraping the casing pipe: inserting a scraping instrument from the space under the well and scraping for a preset distance under a design repairing position; pigging; inserting into a repairing tubular column of an expansion pipe: connecting the repairing tubular column of the expansion pipe from well, wherein the repairing tubular column of the expansion pipe comprises an expanding repairing tubular column, an expander connecting rod, a dustproof component and a phi 73mm external thickening oil tube tubular column from bottom to top; pressing the repairing tubular column of the expansion pipe; testing pressure; salvaging bottom blockage, thereby realizing the repairing for the casing pipe with damaged length exceeding 20m. When the repairing method provided by the invention is used for repairing the casing pipe of the oil-water well with damaged length exceeding 20m, the success rate reaches 100% in more than 10 times of well applications.

The invention relates to a method for treating organic wastes by anaerobic fermentation, in particular to a method for producing biogas by performing union fermentation on livestock and poultry excrements, sludge from urban sewage treatment factories and organic garbage. The method comprises the following steps of: smashing the organic garbage; putting the smashed organic garbage into a comprehensive pretreatment pool and mixing the smashed organic garbage with the sludge from the urban sewage treatment factories and the livestock and poultry excrements; diluting the mixed materials to form suspension containing 8 to 12 percent of solids by using the sewage in a farm; and ensuring that the pretreated material meets the material feeding requirement of an anaerobic reactor and enters the anaerobic reactor through a material feeding pump and a pipeline to perform fermentation. The biogas produced by fermentation can be directly used as fuel gases for warming or cooking in treatment factories and surrounding farmers after being purified; the residual part is used for generating electricity for self-use or surfing the Internet by an biogas generator unit; biogas liquid and biogas residues are used as organic fertilizers and returned to farm land. By the technique, the scale of construction of the biogas engineering becomes larger, and unit investment and running maintenance cost are reduced by over 10 percent. Compared with the output of biogas produced by separate fermentation of the sludge or livestock and poultry excrements, the output of the biogas produced by the method is obviously enhanced.

The invention relates to a deep scarification high pressure blowing-in controllable fertilizer distributor, which comprises a traction apparatus, an air compression device, a deep scarification device and a material dispatching device; wherein the traction apparatus moves by power; the air compression device comprises a compressed air collecting vat fixed on the traction apparatus, a compressed air conduit fixedly connected with the compressed air collecting vat, an air compressor fixed on a ration axis and an air compressor cooling roller; the air compressor is connected with the compressed air collecting vat by the conduit; the deep scarification device is fixedly connected with the material dispatching device, comprises a deep scarification pillar and a pellet component fixedly connected with one end thereof; the material dispatching device comprises a material box fixedly connected on a raiser and a material pipe fixedly connected with the material box; the material pipe is arranged on the side of the deep scarification pillar and is fixedly connected with the compressed air conduit on the pipe wall thereof. The deep scarification high pressure blowing-in controllable fertilizer can realize the mechanization operation of the soil subsoil application, has high working performance, good quality, can control fertilizing amount, increases the effective rate of utilization of the fertilizer, does not pollute environment and has good environmental protection effect.

The invention relates to the technical field of household appliances, in particular to a method for realizing fast cooking in an electric conditioning device. The method of the invention is that: first vacuum-pumping is carried out before cooking through the electric conditioning device which is provided with a vacuum extractor, so the food and the water is combined fast; therefore, on the one hand the boiled time of food can be reduced, and on the other hand the air bacterium can be extracted effectively. The invention is applied in the preappointed cooking of the conditioning device for a long time, can slow down the breeding of bacterium in pot, and prevent food that is placed in the electric conditioning device for a long time from going bad and acidification caused by bad ventilation or high temperature; after food is boiled thoroughly, vacuuming can be carried out again so as to retard changing yellow or sour of food in heat preservation.

The invention discloses an organic fuel cell anti-freeze cooling liquid with low conductivity and ultra-long acting and a preparation method of the anti-freeze cooling liquid in the field of anti-freeze cooling fluids. The anti-freeze liquid is prepared from components in percentage by weight as follows: 10wt%-70wt% of ethylene glycol, 0.001wt%-0.01wt% of 8-hydroxyquinoline, 0.005wt%-0.02wt% of uracil, 0.01wt%-0.03wt% of 4-acetaminophen, 0.01wt%-0.05wt% of benzotriazole octadecylamine, 0.005wt%-0.05wt% of N-bromosuccinimide, 0.001wt%-0.01wt% of inosine and the balance of deionized water. The preparation method of the anti-freeze liquid comprises the steps as follows: all the components of the anti-freeze cooling fluid are put in a reaction kettle in percentage by mass; the components are stirred and mixed for 30-90 min, so that all components are fully dissolved and mixed uniformly, the mixed solution passes through anion and cation mixed exchange resin by the aid of a pressure pump, and the fuel cell anti-freeze cooling fluid is obtained. The organic fuel cell anti-freeze cooling liquid with low conductivity and ultra-long acting is weakly alkaline, is anti-freezing and anti-boiling and has performance of low conductivity, ultra-long acting and high corrosion inhibition.

The invention discloses a preparation method of mulberry dry red wine, which comprising the following steps: picking and washing fresh mulberries; crushing, juicing fresh mulberries; sterilizing, adjusting ingredients, fermenting, pouring into a vat, aging, settling, filtering, blending, cold-treating, and then filtering again; temperature-reversing and film-filtering. The dry red wine prepared by the invention belongs to high-grade consumption goods and has high product additional value, thereby completely representing the commercial value of mulberries; moreover, the mulberries are juiced by adopting a vacuum gasbag, thereby effectively avoiding the problem of the acidifying of the dry red wine caused by difficult dissipation of heat generated during the subsequent fermenting because of mulberry peels; in addition, the preparation method further ensures the maximum juice yield of the mulberries , takes good advantage of raw material, lowers the preparation cost, and improves the quality of the mulberry dry red wine.

The present invention relates to a process comprising A) providing a microbial fuel cell comprising i) an anode containing one or more electrically conductive materials which is arranged to provide flow paths for electrons through the electrically conductive material, ii) microbes in electrical contact with the anode iii) a cathode containing one or more electrically conductive materials iv) a catholyte, v) a conduit for electrons in contact with both the anode and the cathode which is a part of a circuit; B) introducing a mixture of one or more electrolytes or one or more electrolytes dissolved in a first fluid with a second fluid containing biodegradable material; C) contacting the mixture of B) with the anode in the presence of microbes; D) contacting the cathode with a catholyte; E) removing from the microbial fuel cell the fluid mixture.

The invention discloses an organic garbage liquid processing method and a device, which radically solves the problem of processing compost garbage by carrying out abandoning after the organic garbage is transformed into a harmless and inodorous liquid. The main technique of the invention includes: by using the organic garbage liquid processing device, organic garbages not exceeding a regulated amount are thrown into an upper part slot provided with a stirring component, a spray component and a temperature adjusting component through a feeding part of an organic garbage liquid processing device; the upper part slot is pre-provided with a fungi bed consists of chaffs containing microbes of a fixed quantity; then the stirring component carries out a stirring process for 2 to 4 minutes with a slow rotating speed of 4 turn / minute and then carries out a fermenting process for 30 to 50 minutes; and the two processes are carried out repeatedly. During the stirring process, the spray component sprays water to the organic garbage and the fungi bed in the upper part slot; the temperature in the upper part slot is adjusted to 35 to 38 DEG C by the temperature adjusting component; at the time, the organic garbage is transformed into a colloidal organic and flows into the lower part slot through the bottom surface with holes of the upper part slot, and then is washed and cleaned by a washing spray component to become a liquid organic and is finally discharged out from a discharge opening by a filtering component.

The invention provides preserving fluid of hepatic cells for a biological artificial liver and a preparation method thereof. The preserving fluid is a solution compounded by ultrapure water. The solution contains the following components within the concentration range: 15-25mmol / L of disodium hydrogen phosphate, 1-10mmol / L of sodium hydrogen phosphate dehydrate, 4-6mmol / L of potassium citrate monohydrate, 10-30mmol / L of sodium chloride, 5-10mmol / L of magnesium chloride hexahydrate, 3-10mmol / L of disodium adenosine triphosphate, 1-5mmol / L of reducing glutathione, 0.1-0.5mmol / L of alpha-lipoic acid, 100-150mmol / L of trehalose (C6H12O5), 200 / 0.510-50g / L of hydroxyethyl starch and 2-10mg / L of matrine. The preparation method of the preserving fluid comprises the following steps of: accurately weighing all components according to the concentration requirements of the components, wherein the alpha-lipoic acid is weighed in a dark place; completely dissolving the other components except the alpha-lipoic acid by using the right amount of ultrapure water; sufficiently dissolving the alpha-lipoic acid in the dark place; and adding the ultrapure water to full dose. The preserving fluid can well protect the cell activity of the hepatic cells for the biological artificial liver and the special functions of the hepatic cells at low temperature so as to satisfy the short-term low temperature preservation of a large-scale hepatic cell bank for the biological artificial liver and / or the hepatic cell protection in the long-distance transportation process.

The invention discloses a repair method of arsenic-polluted soil. The repair method comprises the following steps: 1) activation: an activating agent is added in the arsenic-polluted soil, and is uniformly stirred for reaction; 2) oxidation: manganese dioxide is added in the arsenic-polluted soil activated in the step 1), and is uniformly stirred for oxidation; 3) stabilization: a stabilizing agent is added in the arsenic-polluted soil oxidized in the step 2), and is uniformly stirred for standing; and 4) acid and alkali adjustment: plant ash is added in the arsenic-polluted soil stabilized in the step 3), is uniformly stirred, and is naturally cultivated; and meanwhile, the water content of the soil is adjusted. The repair method combines a leaching technology with a stabilizing technology, and is simple in operation, wide in raw material source and excellent in stabilizing effect.

The invention relates to a compound passivator of heavy metal contaminated soil and a preparation method and application of the compound passivator of heavy metal contaminated soil. The compound passivator comprises 8.0 to 10.0% of slaked lime, 25.0 to 30.0% of modified diatomite, 35.0 to 40.0% of modified phosphogypsum and 25 to 30.0% of biomass carbon in percentage by weight. The use amount of the compound passivator varies according to the soil contamination degree, generally within 1.5% to 2.0%. The preparation of the compound passivator is prepared by mixing the slaked lime, the modifieddiatomite, the modified phosphogypsum and biomass carbon proportionally; the compound passivator disclosed by the invention has a good application effect in remediation of cadmium, lead, zinc and copper compound contaminated soil by a synergistic action of multiple different passivation mechanism components, further can improve the vegetable quality and reduce crop absorption of pesticide residues, and is suitable for remediation of the large-area heavy metal contaminated soil, including the remediation of heavy metal contaminated farmland soil near industrial and mining areas and contaminatedsites in heavy metal production enterprises. The compound passivator can passivate various heavy metal elements and has high passivation efficiency.

The invention discloses a process of recycling terephthalic acid to produce DOTP (dioctyl terephthalate) by using polyester alkaline to reduce wastewater. The process comprises the following process steps: adding terephthalic acid reclaimed materials and isooctyl alcohol into a reaction kettle in a certain proportion, stirring and heating, adding a catalyst and activated carbon when water yield is obviously reduced, continuously stirring and heating the mixture, controlling the temperature of the mixture to 190-230 DEG C, carrying out dealcoholization in vacuum after reaction is ended, heating to 265-285 DEG C and distilling under reduced pressure under -0.09MPa to -0.1MPa to obtain raw ester, adding H2O2 in a certain proportion to discolor; and finally, absorbing impurities by use of activated carbon and kaolin and carrying out filter-pressing to obtain a nearly colorless DOTP finished product. According to the process, the raw materials can adopt untreated alkaline which is low in purity and chromaticity to reduce wastewater to recycle the terephthalic acid, so that a complex pretreatment process is avoided, the terephthalic acid reclaimed materials are utilized to the greatest extent, and the high ester content and the low colour and luster of the DOTP product are guaranteed while the efficiency is high and the energy consumption is low.

The invention discloses fertilizer for Cr (VI) polluted soil remediation and improvement and a preparation method of the fertilizer. The preparation method of the fertilizer comprises the following steps: spraying an EM microbial agent to the surfaces of bagasse and pig manures, then uniformly mixing the bagasse with the pig manures, and composting the mixture to obtain a cured material; adding anOneida silva microbial agent, the EM microbial agent and a desulfovibrio microbial agent into the cured material, uniformly mixing the microbial agents with the cured material, and composting the mixture to obtain a microbial compound; and mixing ferrous sulfate, modified coal ash, ground calcium carbonate and the microbial compound, and granulating the mixture to obtain the fertilizer. The fertilizer can improve the soil structure, improve the soil fertility and remediate and improve a microecological structure of the soil when effectively remediating chromium pollution, finally remetiates and improves the chromium-contaminated soil, and restores the ecological functions.

The invention relates to a production method of a bioorganic fertilizer capable of improving the soil environment. According to the production method, an organic molecular material, a microbial inoculant, a soil loosening and water retaining agent, and a chelating agent are metered and delivered to a material chamber through a belt, the raw materials are extruded and granulated in the material chamber, and after the granulation, the products are screened so as to obtain the bioorganic fertilizer capable of improving the soil environment. By adding the organic molecular material, microbial inoculant, soil loosening and water retaining agent, and chelating agent, the soil colloidal environment is improved, the water, soil, and fertilizer are retained, the soil acidification and soil salinization are prevented, and the heavy metals are fixed.

An antirust polyaniline metal cutting fluid consists of water polyaniline antiseptic 25í½30 proportion, triethanolamine 15í½20 proportion, polyethylene emulsion 45í½55 proportion, polyether polyhydric alcohol 2í½3 proportion and water 15í½40 proportion. It has better antirust and anticorrosion performances.

Disclosed is a compressor. A motor is contained in a closed shell. A compression mechanism for compressing refrigerant is connected with the motor through a rotary shaft. The compressor is provided with refrigerating machine oil. The refrigerant is hydrocarbon refrigerant. Base oil of the refrigerating machine oil is made of polyalkane propylene and meets the requirements of a general formula a as followed. More than one of antioxidant, acid catcher, defoamer and squeeze antiwear agent is added into the refrigerating machine oil. The refrigerating machine oil and the hydrocarbon refrigerant are low in solubility. System performance and compressor reliability are both stable when coolant sealing amount is low.

The invention discloses an integrated methane biological desulphurization device which comprises a tower body composed of an upper desulphurization tower (3) and a lower desulphurization tower (16) which are isolated from each other, a spray system and a reflux system, wherein, the top of the upper desulphurization tower (3) is equipped with a methane outlet (1); the spray system comprises a spray header (2) arranged at the top half of an inner chamber of the upper desulphurization tower (3) and a delivery pipe (23) arranged outside the tower body; two ends of the delivery pipe (23) are respectively communicated with the spray header (2) in the upper desulphurization tower (3) and an inner chamber of the lower desulphurization tower (16); the delivery pipe (23) is equipped with a circulating pump (17); and the reflux system comprises a reflux pipe (19) arranged outside the tower body, and two ends of the reflux pipe (19) are respectively communicated with the bottom of the inner chamber of the upper desulphurization tower (3) and the inner chamber of the lower desulphurization tower (16). The integrated methane biological desulphurization device has the characteristics of being safe and efficient and being capable of monitoring technological parameters in real time and the like.

The invention relates to the field of composite fertilizers, and in particular to a whole-element composite fertilizer and a preparation method thereof. The whole-element composite fertilizer consists of the following raw materials in parts by weight: urea, triple superphosphate, potassium sulfate, monoammonium phosphate, potassium chloride, ammonium molybdate, boric acid, polypeptide alkali chelate zinc, citrate chelate copper, long-lasting additives, illite powder, attapulgite powder and humic acid ammonium. The preparation method comprises the following steps: preparing pretreated raw materials, mixing and stirring, crushing cakes, pelletizing by using a pelletizer, drying granules, cooling the granules, screening, coating finished granules so as to obtain a finished product, and the like. The invention provides the whole-element composite fertilizer which is capable of effectively replenishing organic matters and various medium-trace elements which are urgently required by soil, improving soil structures, improving permeability, and promoting nutrient absorption of crops, and the invention further provides the reasonable preparation method for the whole-element composite fertilizer.

The invention discloses a petroleum hydrocarbon contaminated soil remedying agent and a using method thereof, and belongs to the field of the soil contamination remediation. Aiming at solving the technical problem, the invention provides the petroleum hydrocarbon contaminated soil remedying agent and a remedying method capable of effectively degrading petroleum hydrocarbon in soil, and avoiding soil acidification. The petroleum hydrocarbon contaminated soil remedying agent is prepared from a surfactant, sodium persulfate, citric acid, ferrite and alkaline peroxide. The method is capable of using the surfactant to release the adsorbed-state petroleum hydrocarbon which has a strong binding force with soil colloid, using the citric acid to complex Fe<2+>, continuously activating the sodium persulfate to generate SO4<->.degraded petroleum hydrocarbon, and using the alkaline peroxide to adjust a soil pH, thereby improving the remediation effect of a petroleum hydrocarbon pollutant in the soil, and avoiding a soil acidification problem caused by the sodium persulfate at the same time.

The invention discloses a biological fermentation fertilizer and a preparation method of the biological fermentation fertilizer. The biological fermentation fertilizer consists of mountain soil, soil modifying agents, rice bran, starch and enzyme microorganism according to a certain proportion. The preparation method comprises the following steps of A, starch or brown sugar, rice bran, enzyme microorganism and mountain soil preparation; B, material mixing: a, the starch or the brown sugar is dissolved by water and is uniformly spread on mixed raw materials of the rice bran and the enzyme microorganism, and the stirring is carried out while spreading; b, the mountain soil is added, and in addition, water is added to regulate the water content to be 45 percent; and c, a clean mat is used for covering; C, pile turning: the pile turning is carried out each day; D, fermentation: the fermentation is completed; E, drying: the materials are spread into thin layers on the cement ground for natural drying; F, inspection; and G, package. The biological fermentation fertilizer and the preparation method have the advantages that the product recipe is reasonable, the method is easy to implement, the operation is simple and convenient, beneficial microorganism floras are conveyed to soil cultivation layers, the ecological environment of the soil is improved, the physical and chemical properties of the soil are improved, the crop growth is promoted, the crop quality is improved, the fertilizer consumption is reduced, and the cost is saved.

The technical field of carbon-based fertilizer, and relates to special biological carbon-based fertilizer for a bamboo forest, a preparation method and an application of the special biological carbon-based fertilizer. The biological carbon-based fertilizer comprises the following ingredients: biological carbon, inorganic fertilizer, organic waste aerobic fermentation fertilizer and an adhesive agent. The preparation method comprises the following steps of: A, collecting organic crop biomass, after drying, putting the organic crop biomass in a biological carburization furnace for high temperature calcination, obtaining biological carbon after carbonization, B, grinding, extruding and dehydrating organic waste, putting in a fermentation bin for fermentation for above 24h, removing a fermented material from the fermentation bin, performing second composting, obtaining the organic waste aerobic fermentation fertilizer after drying, and C, uniformly mixing and stirring the biological carbon, the organic waste aerobic fermentation fertilizer, the inorganic fertilizer and the adhesive agent for granulating to form the special biological carbon-based fertilizer for the bamboo forest. According to the fertilizer, the method and the application, the compatibility is reasonable; since the organic waste aerobic fermentation fertilizer is added, the cost of the fertilizer can be effectively lowered; and both bamboo nutrient requirements and slow release of the organic fertilizer are considered.

The sugar-free biscuit and its production process belong to the field of food producing technology. The sugar-free biscuit is produced with wheat flour, starch, sweetener, whey powder, ammonium bicarbonate, baking soda, water, palm oil and other materials, and through mixing, shaping and roasting. It has algal polyose, liquid xylitol or liquid xylose added to replace cane sugar, has mild taste and no influence on blood sugar and is suitable for diabetics too. It is roasted at relatively low temperature, and has the nutritious components well maintained and no toxic matter produced. The materials are strictly screened and the product is health green food.

The invention discloses an effective prawn breeding pond with a dirt cleaning and discharging function. The effective prawn breeding pond with the dirt cleaning and discharging function comprises a breeding pond body, wherein an oxygenation pump is arranged in the breeding pond body; the bottom of the breeding pond body communicates with a blow-off pipe; grooves which are crossed are formed in thebottom surface of the breeding pond body; anti-escape nets are arranged at the upper ends of the grooves; high-pressure jet pipes are arranged at the edges of the insides of the grooves; and jet holes are uniformly distributed in the surfaces of the high-pressure jet pipes. The oxygenation pump is arranged in the breeding pond body, thus, oxygen can be provided for the breeding pond body at any time, the grooves which are crossed are formed in the bottom surface of the breeding pond body, thus, dirt can be intercepted on the way, the sewage discharge efficiency is improved, by the jet holes which are uniformly distributed in the surfaces of the high-pressure jet pipes, dirt can be effectively cleaned and discharged, a large amount of dirt which are cleaned and discharged from the groovescan be cleaned without dead corners, the dirt nearby the center of the pond is cleaned and discharged by a dirt collecting cover arranged in the center of the pond, the anti-escape nets are arranged at the upper ends of the grooves, and prawns can be prevented from escaping into the blow-off pipe arranged at the bottom of the center of the pond. The device is simple in structure, convenient to operate, high in breeding survival rate and suitable for being popularized on a large scale.

The invention belongs to the technical field of fertilizers, and concretely discloses an environmentally-friendly fertilizer and a making method thereof. The making method of the environmentally-friendly fertilizer comprises the following steps: mixing an organic fertilizer, a charcoal fertilizer, a composite fertilizer, modified starch, a phosphate compound and a composite biological inoculant according to a certain mass fraction ratio, standing the obtained mixture, drying the mixture, granulating the dried mixture, and drying obtained granules, wherein the charcoal fertilizer is prepared from hickory shells, rice straws, rice husks, corn stalks and corncobs according to a certain weight ratio; and the composite bacterial inoculant is prepared by mixing ferment bacteria, Arthrobacter globiformils, Bacillus megaterium, Pseudomonas pseudoacaligenes, polysorbate and sodium dodecyl sulfate according to a certain weight ratio. The environmentally-friendly fertilizer prepared in the invention has the characteristics of comprehensive and balanced nutrition, high utilization rate, no pollution, effective increase of the output of crops, and effective absorption and degradation of heavy metals and organic pollutants from soil, so the absorption of pollutants by crops is reduced, thereby guaranteeing the health of human bodies.