48 results about "Swine wastewater" patented technology

The present invention provides an integrated system for treatment of biodegradable waste, including sewage sludge, forestry waste, food waste, agricultural waste, municipal waste, and the like. The integrated system comprises an anaerobic reactor, at least one aerobic reactor, a filtration device, and a desalinization device.

The invention discloses a method and device for fast cultivation of anaerobic granular sludge for treating swine wastewater. The method is characterized by comprising the steps of: firstly, completely soaking deactivated cation exchange resin by using a sodium hydroxide solution with the mass concentration of 3-5% for 5-6h, washing the soaked cation exchange resin to be neutral by using water, and then, completely soaking the neutral cation exchange resin for 5-6h by using hydrochloric acid with the mass concentration of 5% to complete the regeneration of the strong-acid type cation exchange resin. Before the diluted swine wastewater is added into an anaerobic cultivation device, the regenerated strong-acid type cation exchange resin is put in the anaerobic cultivation device, and by means of controlling the temperature, alkalinity, pH value and the like inside the anaerobic cultivation device to gradually increase influent concentration, reduce hydraulic retention time and the like, the anaerobic granular sludge with good settling property is obtained when the chemical oxygen demand (COD) removal rate of effluent of the anaerobic cultivation device is 80-90%. Cultivated strains are stable in property, and the anaerobic granular sludge is quick in maturity, high in activity and short in cultivation period. The device is reasonable in structure and convenient to operate.

The invention relates to a method for purifying pig-raising wastewater by using green water cress. The method comprises the following steps: (1), the pig-raising wastewater enters a marsh gas tank and stays for 4 days to 8 days; (2), effluent after being treated by the marsh gas tank enters a sedimentation tank and stays for 4 days to 6 days; (3), effluent after being treated by the sedimentation tank enters a green water cress surface current artificial marsh and stays for 3 days to 5 days; (4), effluent after being treated by the green water cress surface current artificial marsh enters a green water cress undercurrent artificial marsh and stays for 3 days to 5 days; and (5), effluent after being treated by the green water cress undercurrent artificial marsh enters an ecological pond, stays for 4 days to 6 days and then is discharged. The effluent after being treated by the ecological pond can pass by a secondary sedimentation tank and a sterilization pond and returns to be used as swinery-flushing water. The method uses a water economic plant-green water cress to purify the pig-raising wastewater, is simple and convenient to operate, has low investment and operation costs, produces byproducts with economic values, such as green water cress, fishes, and the like and can recycle the pig-raising wastewater so as to greatly decrease the purification cost for the swine wastewater and unify economic benefits, social benefits and environmental benefits.

The invention discloses a method for treating swine wastewater. The method includes the steps that the swine wastewater is injected into an electrolytic phosphorus recycling pond; when the pH is increased to 9 to 9.5, the electrolytic reaction is stopped; after standing is carried out, supernatant liquid enters an ammonia settling pond; recycled magnesium ammonium phosphate solid is added into a magnesium ammonium phosphate electrochemical decomposing pond with the proportion of the mole number of phosphorus in the magnesium ammonium phosphate solid to the mole number of ammonia nitrogen in the wastewater in the ammonia settling pond of 1:1, a magnesium ammonium phosphate electrochemical reaction is carried out, and all generated decomposition products are transferred to the ammonia settling pond; then reacting is carried out for 20 min to 30 min at the pH of 9 to 9.5, magnesium ammonium phosphate generated after solid-liquid separation returns to the magnesium ammonium phosphate electrochemical decomposing pond to be repeatedly used, and after repeated using is carried out 6 to 8 times in this way, fresh recycled magnesium ammonium phosphate is used for replacement. According to the method, operation is easy, the project investment cost is low, the treating cost is low, and the ammonia nitrogen in the wastewater can be efficiently removed under the condition that phosphate and magnesium salt do not need to be added; meanwhile, the magnesium ammonium phosphate solid can be recycled, and the high economic benefits and the high environment benefits are achieved.

The invention discloses a slow-released carbon source biochemical-denitrifying treatment device for swine wastewater with high ammonia nitrogen and a low carbon nitrogen ratio as well as a method for treating swine wastewater and relates to the technical field of breeding wastewater treatment. The method disclosed by the invention solves the problem in the prior art that for swine wastewater in which the C/N value is only about 1, the process is complicated, the denitrifying effect is poor, the carbon source and the alkalinity need to be supplemented, the energy consumption is high and the operating cost is high. The device consists of a water inlet box, a water inlet pump, a water outlet overflow pool, a water outlet tank, a mud disposal opening, a rotten wood filler layer, a dissolved oxygen detection probe, a nitrification liquor return pump, a dissolved oxygen online detection display screen, an air aerating pump, a flowmeter, an aerating head and a slow-released carbon source bio-denitrifying treatment pool for swine wastewater with high ammonia nitrogen and the low carbon nitrogen ratio. The method comprises the following steps: feeding the wastewater to a first anoxic reaction region guide channel; and controlling a nitrifying liquor reflux ratio, a hydraulic retention time, temperature and dissolved oxygen. The invention relates to the slow-released carbon source bio-denitrifying treatment device for swine wastewater with high ammonia nitrogen and the low carbon nitrogen ratio as well as the method for treating swine wastewater.

The invention discloses a method for purifying pig-breeding wastewater by using manganese metal self-loaded biochar. The method comprises the following steps: preparing manganese metal self-loaded biochar; carrying out pretreatment and solid-liquid separation of pig manure; blending pig-breeding wastewater; and purifying. The preparation of the manganese metal self-loaded biochar comprises the following steps: crushing corn straws harvested from manganese-rich soil, drying, carrying out high-temperature pyrolysis, cooling and grinding to obtain the manganese metal self-loaded biochar. In the step of blending pig-breeding wastewater, manganese metal self-loaded biochar is added into the pig-breeding wastewater from which solid substances are separated according to the weight ratio of (1: 500)-(1: 300); and in the purifying step, the water depth of the blended pig-breeding wastewater is maintained to be not more than 1.2 m, the water temperature is kept to be 10-55 DEG C, the speed is kept to be 100 r/min and the treatment time is kept to be 6-10 h. According to the method, the antibiotics and Cu<2+> in the pig-breeding wastewater can be efficiently, cheaply and synergistically removed, and the removal rates of the antibiotics and Cu<2+> are both greater than or equal to 90%.

The invention discloses a method for efficiently removing nitrogen and carbon from anaerobic effluent of swine wastewater. The method comprises the following steps: firstly, removing suspended solids contained in incoming water in a coagulating sedimentation system by utilizing polyacrylamide and polyaluminum chloride; through the anaerobic hydrolysis tank, intensifying and converting organic matters in the incoming water into organic acid again to serve as an effective carbon source for subsequent heterotrophic denitrification, and meanwhile, reducing COD to ensure a proper C/N ratio of subsequent nitrosation, anaerobic ammonia oxidation and denitrification reaction; removing most ammonia nitrogen, total nitrogen and COD (Chemical Oxygen Demand) in the incoming water by utilizing an SNAD system, and limiting the aeration rate of the reactor to ensure that a certain concentration of free ammonia exists in a reactor to maintain the inhibition effect on nitrite oxidizing bacteria, so that more ammonia nitrogen is converted into nitrite and finally converted into nitrogen; and finally, maintaining an anaerobic environment in the short-range sulfur autotrophic denitrification-anaerobic ammonia oxidation reactor to ensure that ammonia nitrogen is not oxidized, and controlling the addition amount of sulfur to achieve the purposes of reducing the addition amount of sulfur and saving medicament consumption.

The invention relates to an energy recovery device, in particular to a pig-raising wastewater energy recovery device, which comprises a device support, a swing mechanism, a mounting support, extrusion cylinders, pushing mechanisms, extrusion mechanisms and a cleaning mechanism, the two extrusion mechanisms can be pushed by the two pushing mechanisms to slide in the two extrusion cylinders correspondingly, the two extrusion mechanisms extrude and separate solids and liquid in the pig raising wastewater, the swing mechanism swings at the same time, it is guaranteed that all the separated liquid in the pig raising wastewater flows out of the extrusion cylinders, then the two extrusion cylinders get away from each other, the cleaning mechanism cleans the two extrusion mechanisms, and it is guaranteed that no residual solids exist on the two extrusion mechanisms; and the swing mechanism swings during cleaning of the cleaning mechanism, so that the cleaning effect is further guaranteed.

The invention relates to a method for regulating the ratio of carbon to nitrogen to phosphorus in petroleum contaminated soil. The method is characterized in that charcoal and a mixture of bio-composites and swine wastewater are added into the petroleum contaminated soil, meanwhile the water content of the soil is regulated, the soil is scarified moderately, the content of N and P in the petroleum contaminated soil is improved, and the purpose of regulating the ratio of C to N to P in the petroleum contaminated soil is achieved; specifically, 10 kg of air-dried petroleum contaminated soil is taken as the reference, 5-8 percentage by weight of a uniformly stirred mixed material of charcoal and rice straw floccules after immersion is added, the water content is regulated to 50%-60%, water complement is carried out and the soil is scarified at regular times. According to the method for regulating the ratio of carbon to nitrogen to phosphorus in the petroleum contaminated soil, through determination and calculation of the ratio of C to N to P in the petroleum contaminated soil, the ratio of C to N to P in the petroleum contaminated soil is effectively regulated; besides, the resource utilization of agricultural wastes and swine wastewater is realized, and therefore the method is simple, easy to implement and free from secondary contamination.

The invention discloses a two-stage microbiological treatment method for swine wastewater containing antibiotics, which is characterized by comprising the following steps: 1, filling anaerobic sludge in an anaerobic fermentation tank, settling the antibiotic-containing pig raising wastewater in a settling tank, and introducing the settled antibiotic-containing pig raising wastewater into the anaerobic fermentation tank; 2, domesticating the anaerobic sludge in the anaerobic fermentation tank; 3, entering a stable anaerobic fermentation stage after the domestication stage is completed, and removing nitrogen, phosphorus, COD and antibiotic pollutants in the wastewater; combusting biogas generated in the anaerobic fermentation process for heat supply or purified for grid connection; using CO2-containing gas obtained by biogas purification and combustion as a microalgae growth carbon source; 4, after stable anaerobic fermentation is completed, discharging fermented biogas slurry in the anaerobic fermentation tank into a buffer pool and then introducing into the microalgae photobioreactor to be subjected to microalgae culture treatment; and 5, after microalgae culture treatment is completed, microalgae are collected, and dischaging treated wastewater. The method can be widely applied to the fields of cultivation, environmental protection and the like.

The invention discloses a pig breeding wastewater treatment method. The method specifically comprises the following steps: S1, manually cleaning manures, manually delivering pig manures in a pig houseto a treatment field, then washing the pig house with clean water, flushing pig urine and solids in the pig house into a blow-off pipe together, removing hair and excrement residues in sewage by a grid sieve, then centrifuging the sewage by a horizontal centrifuge, finally, filtering, introducing the sewage into a primary sedimentation tank, precipitating fine suspended matters, adding a certainamount of a flocculating agent again, and directly transporting excrement residues and excrement residues, which are manually cleared and transported in the pig house to an excrement stacking tank. The invention relates to the technical field of wastewater treatment. According to the pig breeding wastewater treatment method, odor generated in the pig breeding wastewater treatment process can be treated to a certain extent in the modes such as microbial metabolic degradation, and the like, the overall deodorization effect is greatly improved, harm of the odor to the surrounding environment andresidents is avoided, and the deodorization procedure is easy to operate.

The invention discloses a method for increasing the flux of swine wastewater treated through an ultrafiltration membrane method, and belongs to the technical field of treatment of livestock and poultry breeding waste. The method comprises the following steps that 1, the swine wastewater is subjected to coagulation pretreatment; 2, residual molysite is subjected to stabilizing treatment; 3, effluent obtained after coagulation is subjected to ultrafiltration treatment. The method has the advantages that after a ferric coagulant is added into the swine wastewater, the floc forming speed is high, the settling property is good, the winter low-temperature treatment effect is good, the adaptability to the water quality of input water is high, and a good coagulating sedimentation effect can be achieved without adding polyacrylamide (PAM) or other coagulant aids; due to the fact that a complexing stabilizing agent is added, residual molysite in the effluent obtained after coagulation can be completely complexed, and it is avoided that ferric iron in the effluent is hydrolyzed to generate colloid to be separated out, and consequently subsequent ultrafiltration film operation is influenced. Compared with the mode that ultrafiltration treatment is carried out without adding the complexing stabilizing agent, the ultrafiltration film flux obtained after complexing and stabilizing treatment is higher.

The invention provides a genetically engineered bacterium for rapidly degrading methyltestosterone and an application thereof. The process comprises the steps of knocking a PhaR gene of testosterone comamonas to obtain a high-expression engineering strain PK-4 capable of generating 3,17 beta-hydroxysteroid dehydrogenase by a gene homologous recombination technology; preparing bacterial suspension from the engineering strain PK-4, inoculating into waste water generated by livestock and poultry and aquatic product cultivation containing testosterone pollutant; cultivating for 48 hours when the temperature is 25 DEG C and the rotating speed is 150rpm, wherein the degradation rate of the methyltestosterone is 78.36-90.23%; the pH value is 6-8 in the waste water of which the methyltestosterone concentration is 1mg/L; the temperature is 15-25 DEG C; and cultivating for 48 hours at 150rpm in an oscillating manner, so that the degradation rate of the methyltestosterone can achieve 60.15%-90.23%. The genetically engineered bacterium has the beneficial effects that the engineering strain PK-4 of removed testosterone comamonas of the PhaR gene is obtained for the first time; and the genetically engineered bacterium is strong in adaptive capacity in swine wastewater, and fast in removal speed of the methyltestosterone, and has a great application value in the aspects of treatment and disposal of breeding waste and bioremediation of environmental pollution.

The invention relates to the technical field of sewage treatment, in particular to a dead pig chemical wastewater treatment method, which uses a water collecting tank, a regulating tank, an anaerobictank, a facultative tank, an aerobic tank, an MBR membrane tank, a DTRO reverse osmosis membrane group and a multi-effect evaporator, and comprises the following specific steps: S1, wastewater collection: firstly, physically filtering wastewater generated in the whole treatment process of pigs died of illness, then injecting the filtered wastewater into an oil-water separator for oil-water separation, and injecting the wastewater subjected to oil-water separation into a water collecting tank through a sewage pump for collection; and S2, preliminary treatment: collecting the wastewater in S1 inthe water collecting tank; pumping the wastewater in the interior of the water collecting tank into the regulating tank through the sewage pump to obtain neutral wastewater. Through the design, the difficult problem that a traditional biochemical method and A2O-MBR equipment are difficult to treat wastewater of pigs died of illness due to the characteristics of high ammonia nitrogen and high saltis overcome, under the assistance of a DTRO reverse osmosis process, the process is relatively simple, and the processed wastewater can reach the standards.

The invention discloses a method for improving denitrification efficiency of pig raising wastewater, and mainly solves the problem of high denitrification cost of pig raising wastewater at present. The method is characterized by comprising the following steps: 1, crushing mushroom bran, naturally air-drying, and adding the crushed mushroom bran and water into an anaerobic reactor according to a solid-to-liquid ratio of 10-30% (v/v); adjusting the pH value to 6-8 after inoculation, and fermenting at room temperature for 20-40 days; 2, after the fermentation is finished, performing vacuum filtration to remove solid residues, standing the obtained liquid organic matter at room temperature for 30-60 minutes, performing vacuum filtration again, and sealing at room temperature for later use; andstep 3, adding the liquid organic matter into an SBR reactor for treating pig raising wastewater. According to the method for rapidly improving the denitrification efficiency of the pig raising wastewater by utilizing the fungus chaff, waste is completely used for treating waste, effluent can well meet related standard requirements, and considerable social and economic benefits are achieved.

The invention provides a technology suitable for anaerobic treatment of swine wastewater and belongs to the field of environmental protection. Traditional swine wastewater treatment technologies mostly adopt an up-flow type anaerobic fluidized bed, have a good treatment effect and are mature, but can only be suitable for small-scale swine wastewater treatment; for large-scale swine wastewater treatment, hydraulic retention time is short and the treatment effect is heavily affected to the limitation of height. A cross-flow type anaerobic fluidized bed is adopted to replace the traditional up-flow type anaerobic fluidized bed for swine wastewater treatment, the length-width ratio of the cross-flow type anaerobic fluidized bed is 2-10 times, a partition wall is arranged in the middle, guide walls are arranged at the two ends, and a thruster is arranged. The swine wastewater moves in the horizontal direction, so that the hydraulic retention time can be designed as required and is generally5-45 days, the swine wastewater treatment effect is guaranteed, meanwhile, project investment and construction difficulty can be reduced, and operational management is convenient. The technology is suitable for the anaerobic treatment of the swine wastewater with various water volumes and concentrations, and is also suitable for the anaerobic treatment of other organic wastewater, especially, theanaerobic treatment of the organic wastewater with high and medium concentration.

The invention discloses a sludge fermentation process for pig raising wastewater. A precipitation tank and a fermentation tank are sequentially included from left to right, a feeding pipe is arranged on one side wall of the upper end of the precipitation tank, the lower end of the precipitation tank is communicated with the lower end of the fermentation tank through a material guiding pipe, and a wastewater collecting device is arranged in the precipitation tank. The wastewater collecting device can discharge and collect upper-layer wastewater in the settling tank; and a material passing pipe is arranged on one side wall of the upper end in the fermentation tank, anaerobic sludge particles can be introduced into the material passing pipe, a stirring device is arranged on the fermentation tank, a carbon rod layer is arranged on the stirring device, and the carbon rod layer is electrically connected with an external power supply through a wire. The carbon rod layer is used as a conductor material and intervenes in electron transfer between anaerobic oxidation bacteria and methane bacteria, so that electrons generated by decomposing organic matters by geobacterium are directly utilized by methanogens, carbon dioxide is reduced into methane, the methane yield and the sludge decomposition speed are increased, the sludge treatment efficiency is improved, and the investment is saved.

The invention discloses a pig farm waste recycling treatment method. The method comprises the following steps: step 1, drying dehydrated pig manure produced in a pig farm, and performing pyrolysis treatment at 300 DEG C to prepare dehydrated pig manure biochar; step 2, applying the dehydrated pig manure biochar to an anaerobic fermentation system of swine wastewater for anaerobic fermentation treatment; 3, evaluating the promotion effect of the addition of the dehydrated pig manure biochar on the fermentation efficiency of the pig manure wastewater by monitoring the soluble COD, the volatile fatty acid concentration and the biogas yield in the anaerobic fermentation process; the abundance of the resistance genes contained in the dehydrated pig manure before and after pyrolysis treatment is measured, and the reduction effect of the charcoal prepared through pyrolysis on the resistance genes in the dehydrated pig manure is evaluated; by comparing the abundance of the resistance genes in the swine wastewater fermentation liquor before and after the addition of the dehydrated pig manure biochar, the reduction effect of the addition of the dehydrated pig manure biochar on the swine wastewater fermentation resistance genes is evaluated. The method realizes green treatment of two kinds of pig farm wastes.

The invention relates to application of an algae-bacterium symbiotic system in removing pollutants in swine wastewater. The algae-bacterium symbiotic system disclosed by the invention can reduce pollutant discharge, promote algae growth, purify wastewater and improve algae utilization rate simultaneously. The scenedesmus subspicatus-nitrobacteria symbiotic system is suitable for purifying pig farmwastewater.

The invention relates to the technical field of wastewater treatment, in particular to an intensive anaerobic treatment device for swine wastewater. The device comprises a shell. A water inlet pipe is mounted on one side of the shell, and a water outlet pipe is mounted on the other side of the shell. A water flow mechanism is mounted in the shell. The water inlet pipe corresponds to one side of the water flow mechanism. A mounting cover mechanism is mounted on the shell. The mounting cover mechanism comprises a cover plate, a chemical feeding part, a separation assembly and a separation plate, wherein the cover plate is mounted on the shell, the separation plate is mounted in the cover plate, a pre-collection area is defined by the separation plate on the upper part of the cover plate, an exhaust pipe is mounted on the cover plate, the separation assembly is mounted in the cover plate, the chemical feeding part is fixedly mounted on the cover plate, and one end of the chemical feeding part penetrates out of the separation plate. According to the invention, when swine wastewater is subjected to anaerobic treatment, organic matters can be degraded at the maximum efficiency, the yield of methane is increased, cleaner methane gas is obtained, and anaerobic sludge can be conveniently replaced.