1040 results about "Anaerobic sludge" patented technology

The invention discloses an advanced treatment system and method for high-concentration percolate in a comprehensive garbage disposal plant, belonging to the field of industrial waste water treatment. The system is formed by connecting a regulating tank, a coagulative precipitation tank, an upflow anaerobic sludge bed reaction tank, a primary anoxic and aerobic membrane bioreactor, advanced oxidation treatment equipment, a secondary anoxic and aerobic membrane bioreactor, nanofiltration membrane treatment equipment, an ozone contact tank and an active carbon filtering tower in sequence. According to the system, garbage percolate can be treated comprehensively, different pollutants in garbage percolate are treated in a classified way by combining physical, chemical and biological treatment,advanced treatment of garbage percolate is realized, and classified treatment for removing pollutants such as organic matters, heavy metals, ammonia, nitrogen and the like is performed, so that treated effluent strictly reaches the requirement of water pollution discharge degree limit in the Household Garbage Landfill Pollution Control Standard, the system runs stably for a long time, and treatment cost is lower than that of a secondary disc pipe reverse osmosis membrane process.

The present invention discloses an Up-flow Multi-stage Anaerobic Reactor (UMAR) used for treatment of medium / high concentration organic wastewater. The stated UMAR with forced internal circulation, improved phase separator and added sludge inlet overcomes the disadvantages of a lower load, a longer hydraulic retention time and a larger dimension in traditional anaerobic reactors. The forced internal circulation increases capacity and cycles of internal circulation thus increased efficiency of contaminant removal. The fast jetting is avoided and efficiency of gas / liquid separation is increased by an improved bending outlet of up flow pipe. The simplified sludge addition and usage are obtained by a sludge inlet. The load of UMAR in this invention can reach about 30 kgCOD / (m3d) for treatment of medium / high concentration of organic wastewater from pulp and paper process and similar wastewater, being about four times of load and capacity of traditional Up-flow Anaerobic Sludge Bed (UASB) reactors.

The present invention discloses an anaerobic biological wastewater treatment system for treating wastewater containing organic contaminants, which includes an anaerobic sludge bed reactor and a dissolved-air flotation tank. The anaerobic sludge bed reactor is used to decompose organic contaminants by way of an anaerobic biological treatment. The dissolved-air flotation tank is used to carry out liquid-solid separation on effluent from the anaerobic sludge bed reactor, so that anaerobic microorganisms entrained in the effluent can be recovered and recycled to the anaerobic sludge bed reactor, thereby enhancing the hydraulic loading of the anaerobic sludge bed reactor.

An integrated bioreactor and its applications as well as a method for treatment of highly-concentrated organic wastewater using the same. The integrated bioreactor with a concentric columnar structure includes an inner layer and an outer layer, in which the inner layer is an upflow anaerobic sludge blanket (UASB) and the outer layer is a moving bed biofilm reactor (MBBR). The effluent of the MBBR is recycled into UASB via a reflux pump mounted between a water tank and the integrated bioreactor. A water outlet of the UASB is arranged with an on-line pH monitor and a mechanical agitation device is arranged on the top of a bottom water distributor. The bioreactor is low in cost, features friendly maintenance, stable operation, and high degree of automation, and can be applied under low temperature.

This invention discloses a method for treating the leachate of garbage. The method comprises: (1) adding flocculant to the leachate of garbage under a basic condition, and performing flocculation and preprecipitation; (2) performing partial denitrification in a circulatory aeration tank and an aeration column; (3) performing anaerobic treatment in an upflow anaerobic sludge bed reactor; (4) performing aerobic treatment by two-step contact oxidation; (5) treating the leachate in a membrane bioreactor; (6) performing nanofiltration. Water after treatment has a COD value not higher than 10 mg / L, and electrical conductivity not higher than 1000 mus cm, and can satisfy the standard for domestic water.

The invention discloses a method for treating coking wastewater, which relates to the method for treating wastewater and aims to solve the problems that an activated sludge method for treating the coking wastewater has the disadvantage of relatively poorer effect on the removal of organic substances and the treated water is difficult to reach the secondary discharge standard of the Integrated Wastewater Discharge Standard (GB8978-96). The method comprises that: the coking wastewater is discharged after passing through an oil separation tank, an adjusting tank, an iron carbon-Fenton oxidation pond, an up-flow anaerobic sludge bed reactor, a multifunctional hydrolyzing pond, an anaerobic tank, a composite active sludge tank and a secondary sedimentation tank, wherein the coking wastewater can also pass through a floatation tank. The coking wastewater treated by the method of the invention has a pH value of 5 to 8 and the rate of removal of Cu2+ from the coking wastewater of 69 to 85 percent, contains 300 to 450mg / L phenol and less than 15mg / L cyanide and therefore reaches the secondary discharge standard of the Integrated Wastewater Discharge Standard (GB8978-96).

The invention relates to a kitchen waste disposal method which is characterized by comprising the following steps of: (1) sorting and removing impurities; (2) crushing a mixture the particle diameter of which is not greater than 8mm; (3) centrifugally separating to obtain a light phase and a heavy phase; (4) centrifugally separating the light phase into grease and a high-concentration solution; (5) hydrating for pulping and acidifying: carrying out water mill on the heavy phase and the high-concentration solution to prepare dense slurry and carrying out hydrolysis acidification on the dense slurry to obtain ground masses; and (6) carrying out anaerobic fermentation in an upflow anaerobic sludge bed to obtain methane. Compared with the prior art, the invention mainly improves the content of organic matter in the materials and greatly reduces the biogas residue yield through sorting, impurity removal and crushing; the grease which is not easy to acidified is removed through the centrifugal separation process and the oil and water separation process, which is beneficial to carrying out anaerobic fermentation; the insoluble organic matter is gradually converted into solvable organic matter through the hydration pulping process and the hydrolysis acidification process, and thereby, the anaerobic fermentation gas yield is improved, the sludge load factor is high and the biogas residue yield is very low.

The invention relates to a method for promoting sludge to be reduced by ozone, in particular to a technology used for pretreating the sludge and accelerating anaerobic sludge digestion speed by utilizing ozone oxidation technique, which is widely applied to the sludge treatment technique of a sewage plant. The method comprises: the residual sludge of the sewage plant is concentrated and then treated by a sludge pretreatment reactor; due to the strong oxidizing property of ozone, the cell wall and the cell membrane of microorganism inside the sludge are broken, and a great deal of organic matter is released out of cells; after being treated by the ozone, the sludge enters into an anaerobic digestion reactor, and anaerobic digestion can be carried out in a closed anaerobic state; gas generated by digestion is treated by a gas purifying device, and methane can be obtained; after anaerobic digestion, the sludge is treated by flocculation and dehydration, and dewatering sludge can be obtained; then, final treatment can be carried out, for example, the sludge can be used for manufacturing agricultural fertilizer, bricks, porcelain granules or auxiliary fuel of fire coal; and anaerobic supernate is treated by biological filtering bed technique, so that the organic matter, ammonia and nitrogen in the solution can be removed.

The invention discloses a breeding sewage treatment method which comprises the following steps of: firstly deslagging sewage, then hydrolyzing, acidifying and regulating, then treating the sewage through a UASB (Upflow Anaerobic Sludge Blanket) reactor, and then carrying out corresponding biochemical treatment through a first-stage A / O treatment system, an intermediate sedimentation tank and a second-stage A / O treatment system sequentially; then sequentially carrying out dephosphorization treatment and flocculation treatment on the sewage subjected to the biochemical treatment to remove sediments, wherein supernatant liquid flows into a final sedimentation tank for further sedimentation, and then the supernatant liquid flows into a pH regulating tank so that the pH value of the supernatant liquid is regulated to be 6-9; then carrying out sterilizing treatment so as to achieve emission on standard. The breeding sewage treatment method disclosed by the invention realizes high-efficiency low-consumption synchronous treatment on carbon, nitrogen and phosphorous to remove total nitrogen, ammonia nitrogen and total phosphorus, thereby ensuring the water quality, improving the production efficiency and greatly reducing the production cost; the breeding sewage treatment method disclosed by the invention has the advantages of simple process, stability in system, small occupied area, low operating cost and the like.

The invention discloses a refuse incineration plant percolate treatment system, which comprises a coagulating sedimentation device, a biochemical device, a settling pond and a sludge concentration pond which are connected in series in turn, wherein the coagulating sedimentation device comprises a grid / grit chamber, a regulation pond and a reaction sedimentation pond, which are connected in turn in series; the biochemical device comprises an intermediate water pool, an upflow anaerobic sludge blanket (UASB) reactor, a secondary anacrobic / oxic (A / O) pond, a membrane bioreactor (MBR), a Fenton-electrochemical reactor and an aeration biological fluidized tank (ABFT), which are connected in series in turn; and the sludge in the reaction sedimentation pond, the UASB reactor, the MBR, the Fenton-electrochemical reactor and the settling pond is conveyed to the concentration pond. In the invention, the combined operation of the coagulating sedimentation pond, the UASB reactor, the secondary A / O pond, the MBR, the Fenton-electrochemical reactor and the ABFT is adopted, the ammonia nitrogen and organic matters in the percolate can be removed effectively, the amount of the concentrated liquidis reduced, the service life of the system is prolonged and the operation cost of the system is reduced.

The invention provides a process and method for denitrification and phosphorus removal of municipal sewage by half shortcut nitrification and anaerobic ammonium oxidation, which belongs to the technical field of sewage biological treatment. The process comprises an untreated water tank, a sequencing batch reactor (SBR) for removing organic matters, a first regulating water tank, a half shortcut nitrification SBR, a second regulating water tank and an autotrophic denitrification upflow anaerobic sludge blanket (UASB) reactor sequentially connected in series. Sludge is separated according to sludge age, which avoids an influence of rapid propagation of heterotrophic bacteria to autotrophic denitrification flora; and a nitrification system adopts half shortcut nitrification, which stably maintains shortcut more easily, ensures the nitrosification rate of the nitrification system, and provides guarantee for denitrification stability of the system. The anaerobic ammonium oxidation technique is applied to deep denitrification treatment of domestic sewage, which reduces the oxygen consumption by 60% compared with the conventional denitrification method, is free of additional carbon sources and neutralizers, and realizes high-efficiency low-energy consumption municipal sewage treatment.

Disclosed is a comprehensive treatment method of livestock and poultry breeding wastewater, which adopts the following three steps that: firstly, an upflow anaerobic sludge blanket treater (3) is used for anaerobic biological treatment and killing bacteria and viruses. Secondly, an improved moving bed biomembrane treater (6) is used for aerobic biological treatment, a longitudinal clapboard (12) is added into the treater (6) to partition the treater into an aerobic zone (13) and a solid-liquid separation zone (10), an air pump (7) is used for increasing oxygen while guiding the sewage, and a simultaneous nitrification and denitrification method is used to remove total nitrogen (TN) and decompose organics under the action of microorganisms. Thirdly, a chemical reaction method is adopted to remove P and N in the sewage, after the former two steps of treatment, mass P and N with a certain amount still exist in the sewage, liquid magnesium oxide is again added for generating magnesium ammonium phosphate precipitates, and the supernatant is discharged when reaching the standards. The method has advantages of speediness, land saving, energy saving, complete material transfer, small influence under external conditions and good purification effects when treating wastewater.

The invention provides a technology and a method for treating urban sewage by three-section short-cut nitrification / anaerobic ammonia oxidation, and belongs to the technical field of biological treatment of sewage. A raw water tank, an organic substance removal sequencing batch reactor (SBR), a first regulating water tank, a short-cut nitrification SBR (provided with an on-line monitoring and feedback control system), a second regulating water tank and an autotrophic nitrogen removal up-flow anaerobic sludge bed / blanket (UASB) reactor are sequentially connected in series in the technology; and the sludge is separated according to the sludge age, so that the contradiction between denitrification and phosphorus removal sludge age is solved. By applying the real-time control technology of the short-cut nitrification SBR to the autotrophic nitrogen removal technology, the problems that the half short-cut of low ammonia nitrogen short-cut nitrification in continuous flow is difficult to maintain, the concentration ratio of ammonia nitrogen to nitrous in the effluent is difficult to control and the like are solved. By successfully applying the anaerobic ammonia oxidation technology todeep denitrification treatment of the domestic sewage, urban sewage treatment with high efficiency and low energy consumption is realized.

The present invention is the anaerobic treatment, aerobic treatment and membrane treatment process of domestic garbage percolate, and belongs to the field of sewage treating technology. The combined treating process is completed in four units including a two-stage upwards flowing anaerobic sludge bed, an immobilized microbial biological aeration filter, a coagulating and settling pond and a nanometer filtering membrane. The present invention has the advantages of simultaneous elimination of carbon, nitrogen and other pollutants, high treating effect, high load impact resistance and high stability. The present invention may be also applied in treating other waste water with high ammonia nitrogen content, high organic pollutant concentration and great water quality fluctuation.

The invention belongs to the technical field of environment protection and particularly relates to a treatment process of organic wastewater containing high-concentration ammonia nitrogen, which is characterized by comprising the following steps: 1, carrying out pretreatment; 2, carrying out anaerobic treatment, and leading effluent from a coagulation / air floatation pool to an upflow anaerobic sludge blanket (UASB) reactor, wherein the hydraulic power stays for 40 to 120 hours; and 3, treating in a membrane bioreactor system. Through microanaerobic / aerobic environments on a surface layer, as well as the absorption by a microporous structure and biological oxidation action, various pollutants such as organic matters, nitrogen and phosphorus in the wastewater can be removed from wastewater of an ecological base flow, and when the ecological base flow is introduced to a membrane biological reactor (MBR) system, the impact resistance and treatment efficiency of the biological treatment unit can be improved.

The invention relates to a landfill method for rapid stabilization of chromium-containing soil and household garbage. The chromium-containing soil, mineralized waste, anaerobic sludge and kitchen garbage are mixed and filled in the land by a certain way, and then the leachate is subjected to continuous reflux; and 1-2 years after filling, the leachate wastewater can reach discharge standards, so as to achieve stabilization of chromium slag and household garbage.

A deeply sewage treating method and apparatus without sludge discharging is disclosed by means of the physical, chemical and biological methods. Proper sewage treating agent with powerful adsorbing capacity, organic matter decomposing and oxidizing capacity and settling capacity is selected based on the quantity of sewage and pollutant characteristic of the sewage to be treated. Sewage is treated through an integrative function tank that comprises a grille primary tank (1), a settling tank (2), high concentration aeration tank (3), aerobic biological tank (4), anaerobic sludge returning tank (5), a sludge and cleaning water separating tank (6), separating tank (7), and pouring tank (8). Sewage is subjected to physical filtering, chemical regulation of pH value, aerating, biological treatment, settling and filtering, so that organic pollutant is converted into microbe that is oxidized and decomposed into CO2, H2O, NH3 and small amount of excess sludge for inside circulating treatment. The treated water reaches the draining standard.

The invention discloses a method by using an up-flow anaerobic sludge blanket - biomemebrane reactor to quickly cultivate anaerobic ammonium oxidation bacteria, comprising the following steps: enriched microorganisms are preserved in an internal membrane of a UASB reactor; garbage landfill is selected for treating activated sludge during the leachate SBR process as seed sludge, and seeded sludge quantity is 45 to 65 percent of effective volume of the reactor; a constant temperature circulating water bath is adopted to maintain temperature of a reaction zone to be 1 DEG C higher or lower than 32 DEG C; waste water is synthesized by adoption of manpower, and waste water components comprise NH4Cl, NaNO2, MgSO4, KH2PO4, CaCl2, NaHCO3, a microelement I and a microelement II; mass ratio of NH4<+>-N and NO2<->-N during the process of water distribution is controlled to be ranged from 1 to 1.0 to 1 to 1.6; PH value of influent is adjusted to be 7.4 to 7.8. The invention has the advantages of simple technology, stable system operation, high nitrogen removal rate, short acclimation concentration time and so on.

The invention relates to a method for processing antibiotic wastewater, belonging to the technical field of water processing of environmental engineering. The invention uses an up anaerobic sludge blanket-aerobic membrane bioreactor (UASB-MBR) integrated device to perform biological process on the antibiotic wastewater. Firstly, aluminum polychlorid is put in antibiotic wastewater for coagulationpreprocess; COD concentration of the wastewater is lowered by 30.8%, and turbidity is smaller than 10 NTU; then the UASB-MBR integrated device is used to further deep process to control the hydraulicretention time of the system to be 20.5 hours, COD average removal ratio can reach 86.56%, and mixed liquor suspended solid (MLSS) is 3000-4000mg / l; the effective removal ratio of the integrated device is 80-85%. Water yielding COD can reach the National Bio-pharmaceutical Industrial Wastewater Discharge Standard (GB8978-1996) after being processed by the integrated device, and the discharge standard is 300mg / l.

The invention discloses a low-carbon urban sewage biological phosphorus removal and autotrophic biological nitrogen removal device and a low-carbon urban sewage biological phosphorus removal and autotrophic biological nitrogen removal method. The device comprises a raw water tank, a biological phosphorus removal and half shortcut nitrification reactor, a secondary sedimentation tank, an intermediate water tank and an anammox reactor, wherein the biological phosphorus removal and half shortcut nitrification reactor is a university of cape town (UCT) reactor without internal returning of digestive fluid; the secondary secondary sedimentation tank is a radial-flow sedimentation tank; and the anammox reactor is an upflow anaerobic sludge blanket (UASB) reactor. The method comprises: introducing urban sewage first to the anaerobic zone of the biological phosphorus removal and half shortcut nitrification reactor for phosphorus release, then to an anoxic zone of the biological phosphorus removal and half shortcut nitrification reactor for denitrification and phosphorus absorption and finally to an aerobic zone for aerobic phosphorus absorption and half shortcut nitrification; subjecting mixed liquid containing ammonia nitrogen and nitrite nitrogen to sludge and water separation in the secondary sedimentation tank; and introducing the water to the anammox UASB reactor for autotrophic biological nitrogen removal under anammox action. When the method is used, process aeration can be reduced, energy consumption can be reduced, and carbon source is saved. The method is suitable for treating low-carbon sewage.

The invention discloses a temperature-control UASB anaerobic ammoxygen denitrifying method and equipment, which comprises the following parts: cylinder (1) of UASB biological reactor, anaerobic sludge bed (2) on the lower part of cylinder (1), three-phased separator (3) on the top, temperature-control system (4) on the exterior of anaerobic sludge bed (2), wherein the anaerobic sludge bed (2) is active sludge after aerobic and anaerobic disposal in the SBR reactor, which cultures anaerobic ammoxygen strain tamed by microbe rapidly.

The invention relates to an anaerobic fermentation technique for combinely processing feces and straws. The method comprises doing pile treatment to feces, and then mixing with disintegrated straws, adjusting water-content coefficient to 60%-70% to be used as bait of earthworms cultivation, through wormcast which is produced after earthworms eat bait into a methane tank to do methane tank to produce marsh gas. The invention solves the technical difficult problems of layered raw material, incrusted floating upward, difficult discharging, bad gas production effect and the like which are caused by directly utilizing straws to be marsh gas fermentation material and restricts straws to be household methane tank fermentation material for a long term, and meanwhile, wormcast which is used as marsh gas fermentation material has the functions of improving raw material gas production rate, improving anaerobic sludge activity and strengthening the stability of anaerobic fermentation process, and earthworm production improves economic output of handling process.

The invention discloses a rapid culture method of simultaneous desulfidation and denitrogenation granular sludge. The method is characterized in that an upflow anaerobic sludge bed reactor is adopted, anaerobic ammoxidation granular sludge and methanogenesis granular sludge are adopted as inoculation sludge, model wastewater containing ammonia nitrogen and nitrite nitrogen is adopted as inlet water, and the method comprises the following steps: adding sulfide into the model wastewater, adding inorganic salts and trace elements for maintaining the growth of microbes, gradually improving the concentrations of matrixes in the inlet water and / or shortening the hydraulic retention time in order to adjust the running of the reactor, and culturing under anaerobic and shady conditions at 30-37DEG C under the pH value of the inlet water of 7.5-8.0. The sludge obtained in the invention has the advantages of obvious granularity, strong impact resistance, high processing efficiency, saving of the occupied are through cooperating with a UASB reactor, simplification of the desulfidation and denitrogenation process, and low investment and running cost, and is suitable for treating wastewater containing ammonia nitrogen, nitrite nitrogen and sulfides of the light industry, the pharmacy industry, the oil refining industry and the leather making industry.

The invention discloses a process for reusing waste leachate and a device thereof. Which comprises a homogenization process stage, an anaerobic process stage, an aerobic process stage 1, an advance oxidization stage, an aerobic process stage 2 and a reverse osmosis desalination stage.The device comprises the following equipments connected in series by pipes in turn: a water regulating tank, a collecting well, an up-flow anaerobic sludge bed reactor, a reaction tank for continuous and interval aerating, an ozonation system, a membrane biological reactor, a middle tank in which a water pump is arranged, a reverse osmosis system in which a pump, a precise filter and reverse osmosis component are arranged as well as a clean water tank.The beneficial effects of the invention lie in that: a plurality of organic matters which are difficult to degrade can be effectively resolved; a whole set of processes such as the anaerobic process, the aerobic process, the advance oxidization process and the microfiltration are used as pretreatments of the reverse osmosis(RO) system and the water quality index fully meets the water quality requirements of the reverse osmosis system. The last desalination is carried out by using reverse osmosis system to ensure the water quality index reused by the leachate.

The invention discloses garbage leachate treatment process, which comprises the following process steps of: (1) filtering garbage leachate with a fine grid and allowing obtained liquid part to enter a coagulating sedimentation tank; (2) adding a coagulant into the coagulating sedimentation tank, separating precipitate with stirring, and allowing obtained supernate to enter an adjusting tank; (3) adjusting the supernate obtained by step (2) in the adjusting tank until the pH value is neutral; (4) pumping the obtained neutral supernate obtained by step (3) into an upflow anaerobic sludge blanket for treatment by using an anaerobic recycle pump, and allowing effluent obtained after the anaerobic treatment to enter a denitrification tank and a nitrification tank for denitrification and nitrification treatment and then enter an ultrafiltration device for ultrafiltration; (5) bio-chemically modifying the ultrafiltrated effluent by ozone; and (6) performing secondary biochemical treatment on the modified water and then directly draining the processed water after the secondary biochemical treatment. The garbage leachate treatment process has the advantages of high efficiency, low energy consumption and easy operation and management.

The invention discloses a coking wastewater treatment system, including an upflow anaerobic sludge blanket reactor, an anoxic denitrification biofilter, an aerobic nitration biofilter, a multistage iron carbon micro-electrolysis coupling Fenton oxidation bed reactor, an aerobic nitration biofilter and an anoxic denitrification biofilter. A coking wastewater treatment method comprises the following steps of coking wastewater enters the upflow anaerobic sludge blanket reactor, the anoxic denitrification biofilter, the aerobic nitration biofilter, the multistage iron carbon micro-electrolysis coupling Fenton oxidation bed reactor, the aerobic nitration biofilter and the anoxic denitrification biofilter from a raw coking wastewater inlet pipe from bottom up, and is discharged. The coking wastewater treatment system disclosed by the invention has the advantages of being small in occupation area and low in energy consumption, having efficient wastewater treatment efficiency, reducing the operation cost of wastewater treatment, and being high in treatment load, low in energy consumption and small in sludge production yield.

The invention relates to a harmless dimethylacetamide wastewater treatment method which comprises the following steps of: (1) regulating the pH of wastewater in a regulating reservoir; (2) performing pretreatment in an iron carbon-Fenton oxidation pond; (3) performing flocculating sedimentation treatment; (4) adding a carbon source to perform hydrolytic acidification treatment; (5) performing anaerobic biochemical treatment in a primary upflow anaerobic sludge blanket (UASB) reactor; (6) performing anaerobic treatment in a secondary UASB (Upflow Anaerobic Sludge) reactor; (7) treating in an aerobic pond; (8) performing mud-water treatment in a secondary sedimentation tank to drain water. An aerated micro electrolysis method, a Fenton oxidation method and a biological method are combined; moreover, a good wastewater treatment effect is kept, the treatment cost is reduced, and the harmless dimethylacetamide wastewater treatment method has the obvious characteristics of high organic matter removal efficiency, stable effluent quality, low engineering investment, low energy consumption and the like, and is easy to popularize and apply.

The invention relates to a method for treating leachate, which is mainly used for treating town refuse landfill leachate and high-concentration industrial wastewater, and belongs to the technical field of environmental protection. A device for realizing the method comprises a regulating reservoir, a flocculation settling pond, an anaerobic reactor, a membrane bioreactor, a nanofiltration membrane and a reverse osmosis membrane, wherein the anaerobic reactor is an up-flow anaerobic sludge blanket (UASB) or an up-flow sludge blanket filter (UBF); and the membrane bioreactor comprises an anoxic zone and an aerobic zone. The method has high removing rate of CODcr, BOD5, suspended matters (SS) and ammonia nitrogen in the leachate; the device has the advantages of compact structure to reduce occupied land, convenient assembly, quick startup and reduction in debugging time; various membrane modules adopt a modular mode so as to contribute to maintenance and replacement; effluent meets the index requirements of 'Standard for Pollution Control on the Landfill Site of Municipal Solid Waste' (GB 16889-2008); and the effluent can be collected for recycling on occasions having low requirements on water quality.

The invention discloses a magnetite-enhanced biological electrode coupled UASB (upflow anaerobic sludge bed / blanket) apparatus and an operation method.The apparatus comprises an upflow anaerobic biological reactor barrel and a biological electrode system, wherein a circular electrode is disposed in a upflow anaerobic biological reactor sludge layer, a graphite fiber brush anode is disposed in the center, and a graphite felt cathode is arranged around; a biological electrode is connected with a direct-current power supply outside a reactor body through a conductive copper wire; circuit current is monitored in real time through a universal meter connected outside the reactor bod.Direct electron transmission between microbes and the electrode is enhanced by adding the magnetite nanoparticles, and finally an anaerobic biological reactor is quickly started, sludge is granulated and productivity is improved.

The invention discloses a microbial fuel cell based method for treatment and detection of chromium-containing electroplating wastewater. The steps include: 1) injecting anaerobic sludge and a sodium acetate solution into an anode chamber of a two-chambered microbial fuel cell to inoculate microorganisms, injecting a cathode liquid into a cathode chamber, and connecting resistance at the cathode and the anode to form a closed loop, reacting the cell in a thermotank, injecting sodium acetate into the anode chamber each day till the output voltage is stable; 2) changing the anode chamber solution to an oxygen removed anode liquid, and changing the cathode solution to chromium-containing wastewater; and 3) after starting, adjusting the pH value of wastewater, injecting the wastewater into the cathode chamber, connecting the external resistance and starting the treatment process. The method provided by the invention realizes no direct contact of microorganisms and hexavalent chromium, avoids poisoning of hexavalent chromium on microorganisms, and makes microbiological treatment of high concentration hexavalent chromium wastewater become possible. The standard redox potential of hexavalent chromium is 1.33V, the microbial fuel cell is utilized to treat hexavalent chromium wastewater, and the purposes of synchronous wastewater treatment and electric energy recovery are realized.