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48results about How to "High reduction rate" patented technology

Method for recovering carbon source and nitrogen and phosphorus elements from surplus sludge

The invention discloses a method for recovering carbon source and nitrogen and phosphorus elements from surplus sludge and belongs to the field of sludge and sewage treatment, aiming at deficiencies that when the surplus sludge is fermented under alkaline environment in which sodium hydroxide is only used for providing alkalinity, the mole ratio of orthophosphate to ammonia nitrogen in fermentation liquor is low, which is disadvantageous to recovery of ammonia nitrogen and phosphorus in the fermentation liquor. In the invention, the pH value of the surplus sewage is controlled at alkaline condition by utilizing the characteristic that sodium phosphate can provide both alkalinity and orthophosphate combined with a sodium hydroxide solution, and organic matters in the surplus sewage are converted into organic acid to a maximum degree by enhancing the hydrolysis of the surplus sewage and restraining the methane production process. Furthermore, the dosage of sodium phosphate is controlled to adjust the mole ratio of orthophosphate and ammonia nitrogen in the surplus sewage fermentation liquor to be (0.9-1.4):1, thus being convenient for recovery of orthophosphate and ammonia nitrogen in the surplus sewage fermentation liquor in a struvite precipitate form. According to the invention, the acid production quantity of the surplus sewage by adopting the method is equal to that under alkaline environment in which sodium hydroxide is only used for providing alkalinity, and the cost is saved.
Owner:BEIJING UNIV OF TECH

Method for processing industrial wastes of edible vinegar through anaerobic digestion coupling pyrolysis technology

The invention discloses a method for processing industrial wastes of edible vinegar through an anaerobic digestion coupling pyrolysis technology, and belongs to the field of the high-efficiency recycle of organic solid wastes. The method comprises the following steps: mixing vinegar residues with water and an inoculum, adding the obtained mixture to a CSTR anaerobic digestion reactor, and carrying out an anaerobic digestion biogas generation reaction; and carrying out solid-liquid separation of an anaerobic digestion reaction discharge material, mixing the obtained separated biogas slurry with new vinegar residues to a constant volume, allowing the obtained new mixture to the CSTR reactor, continuously carrying out the anaerobic digestion biogas generation reaction, drying the obtained biogas residues, allowing the dried biogas residues to enter a single-stage tubular pyrolysis furnace, and carrying out a pyrolysis reaction. Compared with the prior art, the method disclosed in the invention has the advantages of enhancement of the stability and the load change buffer capability of an anaerobic digestion system, improvement of the biogas generation rate and the recycle rate of the vinegar residues, and simultaneous reaction of the liquid phase product proportion of the pyrolysis process.
Owner:BEIJING UNIV OF CHEM TECH

Kitchen waste recycling aerobic treatment system device

The invention discloses a kitchen waste recycling aerobic treatment system device, and particularly relates to the field of kitchen waste recycling. The kitchen waste recycling aerobic treatment system device comprises a waste treatment site and a treatment system device, the treatment system device is provided with a kitchen waste transport vehicle and a storage bin, and one side of the storage bin is provided with a manual sorting platform; and a first spiral conveyor is arranged between the storage bin and the manual sorting platform. Through transmission of a spiral reducing dehydration extruder, kitchen waste is subjected to crushing, spirally-reduced extrusion and dehydration, discharged oily water enters a full-automatic oil separator to be subjected to oil-water separation, solid residues are conveyed to a biochemical treatment machine through a second spiral conveying device to be subjected to high-temperature aerobic fermentation treatment, and before treatment, the salinity,grease and pH value of the kitchen waste do not need to be adjusted. The harmless requirement of kitchen waste treatment can be met, a treated degradation product can be directly changed into nutrient soil or deeply processed into organic fertilizer, and waste oil can be separated from the discharged wastewater or reprocessed into biodiesel.
Owner:OULANG ENVIRONMENTAL PROTECTION TECH CO LTD

Spiral type low elevation greenbelt capable of efficiently reducing runoff pollutants

ActiveCN106381914AMany types of pollution absorptionReasonable water adjustmentWater contaminantsTreatment involving filtrationPollutantAgricultural engineering
The invention discloses a spiral type low elevation greenbelt capable of efficiently reducing runoff pollutants,belonging to the field of rainwater pollution control. The spiral type low elevation greenbelt capable of efficiently reducing runoff pollutants mainly comprises the spiral type low elevation greenbelt and a reverse cone-shaped water retaining filtering wall, wherein the spiral type low elevation greenbelt is composed of a spiral type plant zone and a low elevation greenbelt bottom plant zone; the water retaining filtering wall is composed of 2-3 layers of stone grains made from different materials from outside to inside. The reverse cone-shaped water retaining filtering wall in the spiral type low elevation greenbelt can preliminarily intercept and filter the runoff pollutants seeped from the periphery; in combination of the design for the shape and slope of the spiral type plant zone, under the effect of gravity, the rainwater and the upstream direct surface runoff water entering the low elevation greenbelt all spirally flow and infiltrate, so that the seepage time and the seepage path of the incoming water can be greatly prolonged and the capability of the low elevation greenbelt to reduce the upstream runoff pollutants can be promoted. According to the spiral type low elevation greenbelt, the hydraulic load caused by initial rainwater runoff pollution can be effectively relieved, the downstream water-draining pressure can be reduced, and the spiral type low elevation greenbelt has obvious social, environmental and economic benefits.
Owner:NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA

Ecological test system for treating farmland drainage water quality

The invention discloses an ecological test system for treating farmland drainage water quality. The ecological test system comprises an artificial ecological channel, a piece of artificial wet land and a drainage channel for draining water, wherein the artificial wet land comprises multiple levels of water collection areas and water distribution channels, a concrete pipeline with a second control valve is arranged between the bottom of each level of water collection area and the water distribution channel in front of the water collection area, each level of water collection area is isolated from the adjacent water distribution channels at two sides by virtue of a concrete wall, and the concrete wall between each level of water collection area and the water distribution channel in front of the water collection area is higher than the subsequent concrete wall; the water distribution channel in front of the primary level of water collection area is a water inlet channel, and the water distribution channel behind the last level of water collection area is a water returning channel; the water inlet channel is connected with the artificial ecological channel in an end-to-end manner; the water returning channel is connected with the drainage channel; the artificial ecological channel comprises a channel top, a channel wall, a channel bottom and bamboo-caged stones, and the cross section of the artificial ecological channel is in a trapezoid shape. The ecological test system is economical, reliable, capable of saving the land, and capable of reducing the emission of N and P by virtue of the synergism of the ecological channel and a artificial wet land system, and increasing the farmland drainage water quality treatment efficiency.
Owner:WUHAN UNIV

Perishable waste degrading microbial agent and application thereof

The invention relates to the technical field of perishable waste treatment, and particularly relates to a perishable waste degrading microbial agent and application thereof. The perishable waste degrading microbial agent comprises basic microbes, synergistic microbes, cross-linked slurry and gypsum powder, wherein the cross-linked slurry comprises a water solution of sodium alginate and high-substitution-degree sulfobutyl ether-beta-cyclodextrin in a weight ratio of (0.5-5): 1, and the gypsum powder contains 25-40% of phosphogypsum whiskers modified by silane coupling agents. The composition of basic microbes and synergistic microbes is adjusted and optimized, and the perishable waste degrading microbial agent is obtained by compounding the composition with the cross-linked slurry, adding modified gypsum powder and carrying out granulation; the obtained immobilized microorganisms are viable bacteria, so that there is no need to activate the immobilized microorganisms when in use, and the immobilized microorganisms can be stored for 12 months or above at normal temperature; and the perishable waste degrading microbial agent can finally degrade perishable waste into carbon dioxide and water in combination with an immobilized enzyme preparation, so that the reduction rate of perishable waste is up to 99% or above.
Owner:HANGZHOU NAXI ECOLOGICAL TECH CO LTD

Sludge side-stream treatment device based on nitrite reinforced sludge fermentation and method thereof

ActiveCN110002681AStable deamination effectIntensified fermentationWater contaminantsMultistage water/sewage treatmentVolatile fatty acidsWater quality
A sludge side-stream treatment device based on nitrite reinforced sludge fermentation and a method thereof are applied to a municipal sewage treatment system to reinforce nitrogen removal and sludge in-situ decrement of the system. Part of concentrated sludge in a secondary sedimentation tank enters an anaerobic zone through a return-flow system, and other part of the concentrated sludge is treated by a sludge side treatment system and then flows back to an appropriate zone of the sewage treatment system. Meanwhile, a programmable logic controller (PLC control system) is equipped. By monitoring COD and ammonia nitrogen concentration of influent water, sludge fermentation time and sludge return position of a sludge side return-flow system are controlled, excess sludge return mode is precisely controlled, the influence of influent water quality change fluctuation on the sewage treatment system is reduced, and the nitrogen and phosphorus removal efficiency of sewage is improved. The toxiceffect of nitrite can help reinforce microbial cell lysis to make excess sludge further undergo hydrolytic acidification to produce volatile fatty acids and return an anoxic zone to reinforce nitrogen removal. The device and the method can help save carbon sources, have considerable economic benefits and help reduce subsequent sludge treatment costs.
Owner:BEIJING UNIV OF TECH

Application of hermetia illucens in transformation of microcystis mud and degradation of algal toxins

The invention belongs to the field of biological science and technology, and specifically discloses an application of hermetia illucens in transformation of microcystis mud and degradation of algal toxins. Applicants transform the microcystis mud containing the algae toxins by using the hermetia illucens and find that the hermetia illucens has a certain degradation effect on the algal toxins in the microcystis mud, wherein the degradation rate is 40.98%, after the microcystis mud is transferred by the hermetia illucens, only 0.81% of the algal toxins are transferred into hermetia illucens bodies, and the transfer amount is small; bran, corn bran and the microcystis mud are mixed according to a certain ratio to feed larvae of the hermetia illucens to transform the microcystis mud, and a better transformation effect can be obtained; and a transformation method provided by the invention can effectively transform the microcystis mud to obtain hermetia illucens larvae protein, the transformation cycle takes only 12-13 days, and the method can also degrade the algae toxins in the microcystis mud, and solve pollution of the microcystis mud to the environment and influence of the microcystis mud on health of animals and humans.
Owner:HUAZHONG AGRI UNIV +1

Method for reduction and detoxification of hazardous waste sludge

The invention discloses a method for reduction and detoxification of hazardous waste sludge. The method comprises the steps: adding a microbial bacterial agent to the sludge, adding an auxiliary material for conditioning, providing an external heating source, performing continuous stirring, and performing aeration, wherein the sludge is chemical hazardous waste sludge with a water content of 80% or above, the water content is 70% after the auxiliary material is added, and the microbial bacterial agent is complex bacteria. According to the method, bio-thermal energy generated through degradation of organic matter in the microorganism high-temperature process and the complex bacteria are utilized to decompose the organic matter, destroy the aggregate structure and disperse the sludge particles, the interstitial moisture and surface moisture are turned into free water, the binding force is weakened, and the removal difficulty is reduced; and in addition to the auxiliary heat, the temperature inside a box body is kept at 60-80 DEG C. According to the method, the optimal control conditions in the process of reduction and detoxification are determined, the method has the advantages of ahigh degree of reduction, high detoxification efficiency, low treatment cost, a high comprehensive utilization rate, no secondary pollution, simple operation and the like, and the economy benefits, environmental benefits and social benefits are good.
Owner:NANJING NORMAL UNIVERSITY

Data replication method and device and computer storage medium

The invention discloses a data replication method and device and a computer storage medium, and belongs to the field of data storage. A first storage device obtains a modified data block of a first snapshot of a logical volume of the first storage device for a second snapshot of the logical volume, and determines a target data segment in the second snapshot according to a target storage address of the modified data block in the logical volume, then, similar data blocks corresponding to the modified data blocks are searched in the target data segments, and when the target data segments contain the similar data blocks corresponding to the modified data blocks, the modified data blocks are sent to the target data segments; and the first storage device sends storage address description information containing the similar data blocks and copy information of difference information of the modified data blocks relative to the similar data blocks to the second storage device. The data volume of the copy information sent by the first storage device to the second storage device is smaller than the data volume of the modified data block, so that the network bandwidth occupied by the modified data in the transmission incremental data is reduced, and the network overhead is reduced.
Owner:HUAWEI TECH CO LTD

Sludge reduction and resourceful treatment system for waterworks

The invention discloses a sludge reduction and resourceful treatment system for a waterworks, and belongs to the technical field of general solid waste treatment. The system comprises a sludge primary dehydration module, a sludge conveying module, a sludge deep dehydration module and a sludge resource utilization module, the sludge primary dehydration module adopts a stacked screw machine or a centrifugal machine for dehydration; the sludge conveying module adopts a belt conveyor or a spiral conveyor for conveying; the sludge deep dehydration module comprises a sludge conditioning reactor, a conditioner adding system, an integrated sludge deep high-dryness intelligent decrement machine, a precision filter, a flushing water tank, a flushing water pump and an air compressor; the sludge resource utilization module comprises a scraper conveyor, a semi-dry sludge bin, a sludge dump truck and a firing-free brick making system. The system can effectively dehydrate high-water-content sludge of an existing waterworks, the size of the sludge is reduced, and pollution of the sludge to the environment is reduced; a firing-free brick making system is adopted for resourceful treatment, and the system saves energy consumption and is high in waste utilization rate.
Owner:SHANGHAI SHENYAO ENVIRONMENTAL PROTECTION ENG

Perishable garbage microbial degradation technology

The invention discloses a perishable garbage microbial degradation technology. The technology comprises the following steps of: 1, crushing perishable garbage, 2, preparing a microbial base material,3, activating microorganisms, 4, adding the mixed microbial base material into a microbial biochemical cabin, enabling the temperature in the microbial biochemical cabin to be kept between 25 DEG C and 35 DEG C, and completely activating the microbial activity, and 5, conducting normal operation of the microbial biochemical cabin: feeding the microbial biochemical cabin according to the rated treatment capacity every day, calculating and discharging degradation residues according to 5% of the rated treatment capacity before entering every day, and leaving other materials in the microbial biochemical cabin to serve as a microorganism bacterium bed. No secondary pollution is generated in the degradation process. The technology can work at normal temperature, and is energy-saving, environment-friendly and high in decrement rate. The moisture content of the produced solid organic matter is 50-75%, and the organic matter is rich, is rich in humic acid, is a good organic matrix, and can be used as an organic fertilizer composting auxiliary material to realize resource utilization.
Owner:ZHEJIANG HUAQINGYUAN BIOTECH CO LTD
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