492 results about "Biotreatment" patented technology

The invention relates to the technical field of sewage treatment, in particular to an aerobic aeration treatment system for plateau domestic sewage treatment, which comprises a pretreatment unit, a biological treatment unit, an advanced treatment unit and a recycling unit which are connected in sequence, the system further comprises a data acquisition module, an aerobic aeration intelligent regulation and control module, a biochemical environment constant-temperature maintenance module, a carbon-nitrogen proportion and backflow dynamic regulation and control module, a digital twinning and sludge characteristic simulation module and an energy collaborative scheduling module. Compared with the prior art which adopts a standard aeration strategy and cannot adapt to the special environment of low air pressure and low oxygen partial pressure of the plateau, the system can accurately adapt to the plateau environment by integrating real-time atmospheric pressure and water temperature monitoring, dynamically calculating the oxygen saturation solubility and correcting the aeration control target according to the oxygen saturation solubility, so that the aeration control target is optimized. Stable supply of dissolved oxygen required by biochemical reaction is ensured, and the technical bottleneck of low efficiency of traditional sewage treatment in plateau regions is fundamentally overcome.

The invention discloses a system and a method for classified sewage treatment, and belongs to the technical field of environmental engineering and water treatment. The system comprises the following components: an intelligent water quality detection module, which is used for real-time and accurate monitoring of COD, BOD, ammonia nitrogen, total phosphorus, suspended matter concentration and heavy metal content; the sectional bioreactor realizes deep removal of nitrogen and phosphorus and efficient biological treatment by flexibly adjusting reaction conditions of each section; the intelligent flocculation control module is used for automatically and accurately adjusting the adding amount of a flocculating agent, and is combined with integrated operation of efficient inclined tube precipitation and sludge concentration, so that the water quality of discharged water is stable, and the medicament consumption is reduced; the ultrafiltration membrane bioreactor effectively removes residual suspended matters and colloids, and ensures that the effluent stably reaches the standard for a long time through the synergistic effect of catalytic ozonation; and the sludge treatment module is used for realizing collaborative optimization management of sludge reduction, recycling and energy recycling.

The invention relates to the technical field of sewage treatment, in particular to low-dissolved-oxygen sewage microbiological treatment equipment which comprises a water storage barrel, a conveying mechanism is mounted on the water storage barrel, a treatment mechanism is mounted on the conveying mechanism, a cleaning mechanism is mounted at the bottom of the water storage barrel, and a discharging mechanism is mounted on the cleaning mechanism; through installation of the conveying mechanism and the treatment mechanism, sewage needing to be treated can be conveyed into the water storage barrel to be treated, purification treatment is conducted through the treatment mechanism, the treatment mechanism drives the filtering mechanism to rotate continuously, sewage entering the water storage barrel can be treated and filtered, and under driving of the treatment mechanism, sewage treatment is facilitated. The cleaning mechanism scrapes and compresses sediments at the bottom of the water storage barrel, the compressed sediments can be pushed out and cleaned through the discharging mechanism, cleaning after sewage of the water storage barrel is completely discharged is not needed, and operation is convenient, fast and efficient.

A rotor assembly (10, 150, 270, 310) and method of using the rotor assembly (10, 150, 270, 310). The rotor assembly (10, 150, 270, 310) includes a bio-process bag (48), a drum (46) that receives a lower portion of the bag (48), and a pressure ring (50). A holder (54, 182) couples an upper portion of the bag (48) to the pressure ring (50). The pressure ring (50) is coupled to the drum (46) to define an interior space that contains the bag (48). A liquid transport assembly (35, 178, 272) passes through an opening in the holder (54, 182) so that liquids can be added to, and removed from, the bag (48) without removing the rotor (16, 154) from the centrifuge. A bearing assembly (190) in the holder (54, 182) couples the liquid transport assembly (35, 178, 272) to the rotor (16, 154), and enables the liquid transport assembly (35, 178, 272) to remain stationary while the rotor (16, 154) rotates around it. One or more seal assemblies (276, 312) provide a fluid-tight seal against the outer portion of the liquid transport assembly (35, 178, 272), and prevent fluids from leaking from the bag (48) during centrifugation.

The invention discloses a method for improving livestock and poultry breeding wastewater treatment by a phycomycete system through starch wastewater and application, and belongs to the technical field of environmental engineering and biological recycling. The method comprises the following steps: (1) pretreating livestock and poultry breeding wastewater and starch wastewater to remove impurities; livestock and poultry breeding wastewater and starch wastewater are mixed according to a certain volume ratio to prepare mixed wastewater; (2) mixing chlorella sorojin and aspergillus oryzae in a logarithmic phase according to a certain quantity ratio, and inoculating to construct a microalgae-fungus co-culture system; and (3) putting the microalgae-fungus co-culture system into the mixed wastewater, treating under an illumination oscillation condition, and purifying the mixed wastewater. According to the method, the starch wastewater is adopted as a novel carbon source for replacing a traditional commercial carbon source, and a biological treatment mode of microalgae-fungus co-culture is combined, so that efficient purification of the livestock and poultry breeding wastewater is realized, meanwhile, biomass accumulation is promoted, resource utilization of wastes is realized, and dual targets of wastewater treatment and resource recovery are achieved.

The invention discloses a bacterial strain for broad-spectrum degradation of organic pollutants and application of the bacterial strain, the bacterial strain is classified and named as Acinetobacter venetianus, the bacterial strain number is GXGD-YZ-2508, the bacterial strain is preserved in Guangdong Microbial Culture Collection Center on August 27, 2025, the preservation number is GDMCC No: 66869, and the preservation address is the fifth floor, No. 59 building, No. 100 Courtyard, Xianlie Middle Road, Guangzhou City, Guangdong Province. The strain can grow under the condition that the salinity is 3wt%, can efficiently degrade 4-ethylphenol (4-EP), 2, 4-di-tert-butylphenol (2, 4-DTBP) and terephthalic acid (PTA), is suitable for biological treatment of aromatic pollutant-containing wastewater such as refining wastewater and PTA production wastewater, and has the advantages of high treatment efficiency, strong environmental adaptability and the like. The invention provides a novel microbial resource and an effective technical support for biological treatment of refractory aromatic pollutants, and has a wide application prospect.

The invention relates to a method for treating printing and dyeing wastewater. The method comprises the following steps: neutralization regulation, primary filtration for removing scum, decoloration and flocculation, secondary filtration, pH regulation, catalytic degradation under visible light, MBR membrane treatment and discharge. The printing and dyeing wastewater treatment process provided by the invention is compact in link, the first-stage filtration, decoloration flocculation and second-stage filtration in the treatment process all adopt conventional technical means in the field, the operation is simple and convenient, the cost is low, and a special bismuth-based aerogel composite material is used as a catalyst for photocatalytic degradation at the rear end; the aerogel is prepared by cross-linking a modified graphene oxide / BiOCOOH composite photocatalyst with an acrylic polymer matrix and then carrying out supercritical drying, so that macroscopic immobilization of a nano catalyst is realized. According to the method, the technological process is compact, the cationic dye which is difficult to biologically treat can be efficiently degraded, the industrial problems that a powder catalyst is easy to lose and difficult to recycle are solved, key indexes such as COD and chromaticity of the treated wastewater are remarkably reduced, and the treated wastewater can be discharged after reaching the standard.

The invention provides a treatment method of wood cooking wastewater. Comprising the following steps: providing wood cooking wastewater to be treated; the pH value of the wood cooking wastewater is 3-5; an alkaline emulsion is added into the wood cooking wastewater for pretreatment, so that the pH value of the wood cooking wastewater is 8 or above, and at least part of suspended solids in the wood cooking wastewater are removed; carrying out anaerobic biological treatment on the wood cooking wastewater treated by the alkaline emulsion; carrying out aerobic biological treatment on the anaerobic biological treatment effluent; adding a coagulant into the aerobic biological treatment effluent, adjusting the pH value to 4.0-5.5, and carrying out coagulation treatment; and carrying out oxidation adsorption treatment on the wood cooking wastewater subjected to coagulation treatment. And the effluent can reach the first-grade A emission standard, and the cost is relatively low.

A high-gram-weight raw paper white water advanced treatment system relates to the technical field of white water treatment and comprises a disc filter, and the outlet end of the disc filter is respectively connected with an ultra-clear filtrate tank and a clear filtrate tank; the outlet end of the ultra-clear filtrate tank is connected with a tubular filter, and the outlet end of the tubular filter is connected with a net pressure part high-pressure sprayer; and the outlet end of the clear filtrate tank is connected with the ultra-clear filtrate tank through a circulating fine filtration structure. The utility model solves the problem that in the prior art, the treatment depth of clear filtrate and ultra-clear filtrate after white water is treated by a physicochemical treatment method or a biological treatment method does not reach the degree that the clear filtrate and the ultra-clear filtrate can be used for high-pressure spray water of a net part.

The invention discloses a control method of a wine brewing wastewater anaerobic reactor, belongs to the technical field of wastewater biological treatment, and mainly solves the problems of inaccurate judgment of an operation stage and single control strategy in the prior art. According to the method, parameters such as a pH value, COD (Chemical Oxygen Demand), VFA (Volatile Fatty Acid) concentration, biogas yield and ATP (Adenosine Triphosphate) content are monitored in real time, and an operation process is divided into three stages, namely a starting stage, a steady-state stage and an abnormal recovery stage. The load increasing rate and the pH range are controlled in the starting period; in the steady-state period, the water inlet flow is adjusted through a PID algorithm to maintain stable operation; and measures of reducing flow, increasing stirring, adding an alkaline agent and the like are taken in an abnormal recovery period. Through multi-parameter collaborative judgment and differential control strategies, accurate recognition and dynamic adjustment of the operation stage are achieved, the stability and the treatment efficiency of the treatment system are remarkably improved, and the method is suitable for anaerobic biological treatment of various kinds of wine brewing wastewater.

The utility model discloses a three-phase circulation bioreactor. The three-phase circulation bioreactor comprises a shell, a communicated exhaust pipe is fixedly connected to the center of the top of the shell; a communicated overflow pipe is fixedly connected to the side wall of the top of the shell; a blow-off pipe and a water inlet pipe which are communicated with each other are fixedly connected to the periphery of the bottom of the shell; a net plate is fixedly connected to the middle of the interior of the shell; a biofilm carrier filler is arranged at a position, corresponding to the upper part of the screen plate, in the shell; the gas escapes upwards, so that the gas returns to the upper part of the water body after reaching the bottom of the sewage, the circulation effect is achieved, and the mixing effect of the gas and the sewage is further improved; besides, the spray heads can rotate along with the hollow shaft, and the spray heads on the different vortex-shaped pipes are arranged in a staggered manner, so that the distribution density of the gas in the sewage water body can be improved, the mixing effect between the sewage and the gas is further improved, the biological treatment reaction speed of the sewage is prevented from being influenced, and the purification efficiency of the reactor is improved.

The application discloses a kind of aquaculture tail water solubility organic matter characteristic analysis method and system, specifically related to water quality monitoring and analysis technical field, for solving the problem that existing solubility organic matter characterization method is difficult to effectively associate and predict its actual degradation behavior in biological treatment process.Synchronously obtain the three-dimensional fluorescence spectrum data of the water sample to be measured and the liquid chromatography-organic carbon detection combined analysis data, obtain the hydrophilic-hydrophobic component ratio and the proportion of tyrosine-like and humus-like fluorescence components from the analysis, and then judge whether there is significant humus-like component.According to the judgment result, selectively start the deep analysis of the molecular aggregation state of humus-like component, and comprehensively consider the related proportion parameters and aggregation state information, finally realize the evaluation of the biological degradation potential trend of solubility organic matter, and provide key basis for the stability warning of biological treatment system.

The present application relates to a kind of open channel water distribution equalization control method and system, method includes: according to the maximum water inflow, the total water inflow of total water inflow range is pre-set;All biological treatment units are divided into the fixed water amount group of control water inflow and the free water amount group of not control water inflow;When the water inflow of free water amount group and the water inflow of fixed water amount group reach preset condition, judge the total water inflow range of current needs adjustment and adjust the total water inflow range of current, then adjust the water inflow of fixed water amount group.The setting of group, make part of filter's water inflow be controlled according to total water inflow, then by adjusting the total water inflow range, get the most suitable water distribution mode, when not set total water inflow flow metering equipment in the biological treatment unit in sewage treatment facility, can be realized by the control logic through open channel water distribution mode to each biological treatment unit for more balanced water distribution purpose, finally guarantee the load balance of each biological treatment unit when running.

The invention discloses a hydrolytic acidification microbiological treatment pond, and relates to the field of hydrolytic acidification pond application, the hydrolytic acidification microbiological treatment pond comprises a pond body, the inner side of the pond body is provided with a water inlet header pipe, the water inlet header pipe is connected with a plurality of groups of water distributors, each water distributor comprises an annular water distribution pipe, the pond body is internally provided with a grating frame, and the grating frame comprises a plurality of groups of grating spaces; and a bearing plate is arranged at the top of each group of grating space. By arranging the grating frame, laying the bearing plate and the stirring structure, local sedimentation of a sludge layer can be reduced, the sludge layer can be supported and borne, sludge sedimentation can be reduced, when waste water is sprayed out through a water spraying opening of an annular water distribution pipe of the water distributor, the waste water impacts a paddle outside a movable rod to drive the paddle to rotate slowly, and the waste water can be stirred gently; suspended solids in the wastewater are distributed more uniformly, and the turbulence phenomenon caused by non-uniform distribution of the suspended solids in the wastewater is reduced.

The invention relates to the technical field of solid waste biological treatment, and discloses La and Ce toxicity resistant thiobacillus thiooxidans and application thereof, and the collection number of the thiobacillus thiooxidans is GDMCC No: 63522. The invention provides a novel thiobacillus thiooxidans, and the preservation number of the novel thiobacillus thiooxidans is GDMCC No: 63522. The strain can highly tolerate La and Ce, and can realize biological leaching of solid wastes rich in La or (and) Ce under high ore pulp density, so that more solid wastes can be treated in a single batch, the biological leaching rate is improved, and the strain has a good application prospect.

The invention belongs to the field of comprehensive treatment of oily sludge, and relates to a reduction treatment method of oily sludge. Comprising the following steps: step 1, mixing a first part of oily sludge to be treated with an organic loose material, inoculating a thermophilic compound bacteria solution into the mixture, feeding the mixture into a high-temperature microbiological treatment unit, introducing air, stirring and heating to a target fermentation temperature, and maintaining the target fermentation temperature; step 2, gradually adding a second part of to-be-treated oily sludge into the high-temperature microbiological treatment unit under heating and stirring conditions, and carrying out a first high-temperature aerobic fermentation reaction to obtain a high-temperature aerobic fermentation material; step 3, outputting a part of the material subjected to high-temperature aerobic fermentation, continuously adding a third part of oily sludge to be treated into the high-temperature microbiological treatment unit, and carrying out high-temperature aerobic fermentation reaction again; and step 4, repeating the step 3 until the reduction treatment of the oily sludge is completed. Compared with the prior art, the biological treatment method is lower in cost and higher in decrement rate.

The invention discloses a coffee fresh fruit primary processing wastewater treatment process and a wastewater treatment system, and belongs to the technical field of wastewater treatment. The method comprises the following steps: preliminarily filtering coffee processing wastewater; feeding the preliminarily filtered wastewater into a polysaccharide reactor, adjusting the pH value to 7-9, stirring, and flocculating and precipitating to complete pretreatment; s3, carrying out regulation-hydrolytic acidification on the pretreated coffee wastewater, carrying out hydrolytic acidification on macromolecular organic substances in the wastewater, and standing for solid-liquid separation; s4, carrying out oxidation-reduction reaction on the coffee wastewater subjected to hydrolytic acidification treatment; then carrying out anaerobic reaction on the coffee wastewater subjected to the micro-electrolysis reaction to degrade organic matters, and carrying out three-phase separation on solid, liquid and gas; then carrying out an anoxic / aerobic reaction on the coffee wastewater subjected to the anaerobic reaction treatment; and then carrying out ozone / UV catalytic oxidation on the coffee wastewater after the nitrification anoxic / aerobic reaction. According to the method, microelectrolysis and biological treatment processes are combined, the acidic polysaccharide and pectin comprehensive wastewater belongs to high-difficulty wastewater, and pollutants in high-concentration coffee fresh fruit primary processing wastewater are effectively degraded.

The application discloses a method for removing impurities from cow urine and application thereof in preparation of algal culture solution, and relates to the technical field of biological treatment. The method for removing impurities from cow urine adopts a multistage treatment system of chelating agent removal, activated carbon adsorption, physical filtration, composite microbial fermentation and precision filtration; the physical filtration adopts a stainless steel filter screen; the microbial fermentation adopts a composite microbial agent containing bacillus pasteurii, bacillus subtilis and lactobacillus plantarum; and the precision filtration adopts a microporous filter membrane. The application develops an efficient, environment-friendly and low-cost method for removing impurities from cow urine, removes macromolecular contaminant substances and harmful microorganisms and the like impurities in the cow urine, and meanwhile retains beneficial nutrient components in the cow urine; high-quality algal culture solution is prepared through the impurity-removed cow urine, the cost of the algal culture solution is reduced, and the nutrient components in the cow urine are fully utilized, so that abundant nutrient substances are provided for the growth of algae.

This invention relates to the field of harmless treatment technology for oily sludge generated during crude oil extraction, specifically to a method for rapid harmless treatment of oily sludge through photo-coupled biodegradation. Conventional methods for harmless treatment of oily sludge are inefficient and energy-intensive. To address these problems, this invention provides a method for rapid harmless treatment of oily sludge through photo-coupled biodegradation. This method fully utilizes the sunny summer conditions in Northwest China, creating a "greenhouse effect" by covering and stacking the sludge with plastic film. This significantly raises the temperature of the stack without an external heat source, providing a suitable high-temperature environment for thermophilic petroleum hydrocarbon-degrading bacteria, greatly increasing the biodegradation rate of petroleum hydrocarbons, and shortening the traditional biological treatment cycle from several months to several weeks, thus achieving rapid harmless treatment of oily sludge.

A wastewater treatment apparatus included: a reaction tank which performs biological treatment of raw water, which is organic wastewater; an adding device that adds a nutrient substance to the raw water; a meter that measures the concentration of at least a volatile organic compound in gas released from water in the reaction tank; and a control device for controlling an additive amount of the nutrient substance by the adding device based on a measured value of the concentration obtained by the meter.

A biological treatment of sewage device and method for realizing advanced nitrogen removal of domestic sewage by half partical nitrification-anammox coupled with sulfur autotrophic denitrification. The device includes a raw water tank, a half partical nitrification reactor, a regulating water tank and an anammox coupled denitrification reactor. The domestic sewage enters the half partical nitrification reactor, a mass concentration ratio of NO2−—N to NH4+—N in effluent water is 1-1.32 through real-time control, and then the effluent water enters the intermediate water tank. After it enters the upflow anammox coupled with autotrophic denitrification granular sludge reactor, the synergistic reaction of anammox and sulfur autotrophic denitrification in the reactor achieves the nitrogen removal. The device and the method improve denitrification efficiency by making full use of the synergistic effect between microorganisms, thereby realizing high-efficiency and energy-saving advanced nitrogen removal of municipal sewage.

This invention discloses an environmentally friendly and harmless treatment process for recyclable electrophoresis solution, comprising a storage tank, the outlet of which is connected to a coarse screen tank, the outlet of a plate and frame ultrafiltration tank is connected to a bioreactor, and the outlet of the bioreactor is connected to a filter press. This invention achieves the recycling of the electrophoresis solution through graded treatment in the coarse and fine screen tanks, deep filtration in the plate and frame ultrafiltration tank, mixing and stirring in the bioreactor, and solid-liquid separation in the filter press. This reduces wastewater discharge and environmental pollution. By organically combining physical and biological treatment, harmful substances in the electrophoresis solution can be effectively removed while retaining its recyclable components. This not only helps reduce environmental pollution but also lowers production costs and improves the economic benefits for enterprises. Furthermore, the neutralizing agent used is an organic acid or organic amine, which has better biodegradability and a smaller potential environmental impact.

The utility model relates to the related technical field of reclaimed water treatment, in particular to a zero-discharge reclaimed water recycling device which comprises a base and a pretreatment mechanism, the pretreatment mechanism is arranged on one side of the surface of the base, a biological treatment mechanism is arranged on one side of the surface of the base, and a disinfection mechanism is arranged at one end of the base. According to the reclaimed water recycling device based on zero emission, through the arrangement of the pretreatment mechanism, firstly, reclaimed water is introduced into the water inlet, then a control valve on the water inlet is opened, the reclaimed water enters the first box body through the water inlet, and at the moment, a grating in the water inlet filters particles in the reclaimed water for the first time; when water in the first box body rises to the first filter screen, the first filter screen arranged in the two layers can enter the reclaimed water in the first box body for secondary filtration, when the water level completely overflows the first filter screen, the water pump on the first connecting pipe is opened, the reclaimed water above the first filter screen can be pumped away, and pretreatment of the reclaimed water is completed.

The application discloses a glass fiber reinforced plastic biological deodorization device and relates to the technical field of biological deodorization. The device comprises a glass fiber reinforced plastic box body and a working assembly. The first electromagnetic valve of the working assembly controls the circulation passage. The exhaust gas after single treatment is taken into the second cover from the bottom of the first cover by the first fan, mixed with untreated exhaust gas, and then enters the biological area after being mixed with part of the treated low-concentration exhaust gas, so as to reduce the instantaneous concentration peak, reduce the impact on microorganisms, prolong the contact time through multiple circulation, increase the contact probability of pollutants and microorganisms, gradually reduce the pollutant concentration in the exhaust gas, improve the treatment efficiency, and drive the rotating shaft to rotate by the first motor, so that the multiple groups of stirring blades rotate to uniformly stir the mixed gas in the interior and avoid local concentration difference. The second electromagnetic valve provides interconnection control, and the second fan guides the mixed gas to the bottom of the third cover for biological treatment.

Provided is a biological fluidic system that provides a high degree of sterilization by performing the biological processing in a closed system in which the fluid is contained in chambers that are isolated from the environment in a manner that does not permit ingress of contaminants.

The utility model discloses a chemical waste gas treatment device, belongs to the technical field of chemical waste gas treatment, and solves the problems of low efficiency and incomplete treatment of an existing waste gas treatment method. The input end of the alkaline waste gas collecting induced draft fan is communicated with the alkaline waste gas collecting pipe, and the output end is communicated with the input end of the pickling tower. The output end of the pickling tower and the output end of the alkaline washing tower are both communicated with the input end of the biological treatment unit, the output end of the biological treatment unit is communicated with the input end of the activated carbon adsorption tower, the output end of the activated carbon adsorption tower is communicated with the input end of the air exhaust induced draft fan, and the output end of the air exhaust induced draft fan is communicated with the input end of the coal-fired boiler. The output end of the coal-fired boiler is communicated with the input end of the denitration unit, the output end of the denitration unit is communicated with the input end of the bag-type dust removal unit, the output end of the bag-type dust removal unit is communicated with the input end of the desulfurization unit, and the output end of the desulfurization unit is communicated with the input end of the cyclone. The chemical waste gas treatment device can efficiently and thoroughly treat chemical waste gas.

The utility model discloses water quality aeration purification equipment suitable for high ammonia nitrogen fishpond culture wastewater, which comprises a device body, a protection box is arranged in the device body, a base is arranged below the protection box, a suction pump is arranged in the protection box, a mounting rack is connected below the base, and the mounting rack is provided with a water inlet. A first water tank, a second water tank and a third water tank are sequentially connected to the lower portion of the mounting frame, the front end of the suction pump is connected with a water pumping pipe, the rear end of the suction pump is connected with a water inlet pipe, a first placing table and a second placing table are connected to the outer wall of the protection box, a first pesticide box is arranged above the second placing table, and a second pesticide box is arranged above the first placing table. According to the device, the content of dissolved oxygen in wastewater can be increased, a proper aerobic environment is provided for subsequent biological treatment, the concentration of ammonia nitrogen in the wastewater is reduced, the water quality of a fishpond is improved, precipitation of sludge and formation of an anaerobic environment are avoided, and subsequent stable operation of the device is ensured.

The application provides an oil and gas field waste liquid classification gradient treatment method. The method comprises the following steps: performing electro-oxidation treatment on produced water to obtain electro-oxidation treated produced water; performing adsorption treatment on part of the electro-oxidation treated produced water by using an adsorption material to capture active chlorine, so as to obtain the adsorption material for capturing active chlorine and the adsorption treated produced water; performing biological treatment on the adsorption treated produced water to obtain treated produced water; mixing the other part of the electro-oxidation treated produced water with operation waste liquid, adding the adsorption material for capturing active chlorine, and obtaining gel breaking and de-stabilizing treated operation waste liquid; and performing coagulation and flocculation separation and ion control on the gel breaking and de-stabilizing treated operation waste liquid to obtain treated operation waste liquid. The method is suitable for large platform production mode of oil and gas field development, and can perform classification gradient treatment on produced water and operation waste liquid produced and discharged from platforms in the same region or adjacent regions, so that the treatment cost is reduced.

The application provides a biochemical excrement collecting system and a rail vehicle, and belongs to the technical field of rail vehicles. The biochemical excrement collecting system comprises an excrement collecting cylinder, a sewage discharge pipeline and a biological treatment box. The upper end of the excrement collecting cylinder is connected with a toilet in a vehicle body, and one end of the sewage discharge pipeline is fixedly connected with the lower end of the excrement collecting cylinder. The biological treatment box is used for being installed below the vehicle body and is fixedly connected with the vehicle body. The biological treatment box comprises a box body, a filtering device and a primary filtering chamber. The filtering device is installed in the box body, and the box body is divided into an upper cavity and a lower cavity. An inlet and an exhaust port which are in communication with the upper cavity, and a discharge port which is in communication with the lower cavity are arranged on the box body. The primary filtering chamber is installed on one side of the box body and is in communication with the lower cavity. A sterilization block is arranged in the primary filtering chamber and is in contact with water in the lower cavity. The biochemical excrement collecting system can avoid environmental pollution and does not need to be cleaned frequently, thereby reducing workload and cost.