Weifang Xiaoyu Environmental Protection Water Treatment Equipment Co., Ltd.
The Shanwei buried sewage treatment equipment is the main product of Xiaoyu Environmental Protection Co., Ltd. This product integrates a variety of sewage treatment processes. The equipment itself is built by professional masters . The exterior is coated with multi-layer anti-corrosion materials . The equipment can be effectively used. Remove the impurities in the sewage, whether it is hospital sewage, factory sewage, food sewage or domestic sewage , this equipment can give you a good solution to your problem, choose the right equipment , to Xiaoyu environmental protection is your best Choose, believe in us, let you worry free
Iris buried sewage treatment equipment
Basic installation and use of sewage treatment plants
1. Foundation: If the WSZ series equipment is placed above the floor, it is only necessary to prepare a concrete floor with the same shape as the equipment. The foundation pressure must be greater than 4T/m2, and it is also required to be level and level. If the equipment is buried below the floor, the basic elevation must be less than or equal to the elevation of the equipment and ensure that there is no water in the rain. The foundation is generally plain concrete (whether or not the reinforcement depends on the local geological conditions).
2. Installation: According to the installation diagram, each box is in place, the control box of the electric control box is connected with the water pump, the electric control box is connected with the power supply, and the steering of the fan and the motor must be paid when wiring. The same direction. The position and direction of the cabinet cannot be misplaced, the spacing between the cabinets must be accurate, and the pipes should be connected. Inject clean water into the equipment and check for leaks in each pipe. If not, cover the soil around the box until the equipment inspection hole and level the ground.
Sewage treatment technology description
1) Pollution prevention facilities
The solid impurities in the raw water of this project are relatively high. In order to ensure the normal operation of the lifting pump and other equipment and to ensure the normal operation of the subsequent processing structures, it is proposed to set up a sewage disposal facility in the front part of the main process.
2) Biological contact oxidation method
The biological contact oxidation method belongs to the biofilm method and has the following advantages and features:
Because the amount of biosolids in the biological contact oxidation pond is large, the water flow is completely mixed, so the biological contact oxidation pond has strong adaptability to sudden changes in water quality and quantity;
Due to the large amount of biosolids in the biological contact oxidation pond, when the volumetric load of organic matter is high, the ratio of F/M (F is organic base mass, M is microbial biomass) can be maintained at a certain level, so sludge production can be equivalent or low. In the activated sludge process;
The A/O biological treatment process is the main method used by environmental protection workers at home and abroad to solve the problem of denitrification of sewage in recent years. The method has the following characteristics: The use of nitrifying bacteria and denitrifying bacteria cultured in the system simultaneously achieves the removal of sewage The purpose of carbon organic matter and ammonia nitrogen is lower than that of the conventional activated sludge process and the addition of the nitrogen removal tertiary treatment system. The capital investment is low, the operating cost is low, the power consumption is low, and the floor space is small.
The A/O biological treatment system produces less sludge than the general biological treatment system, and the sludge has good sedimentation performance and is easy to dewater.
The biological contact oxidation method is provided with a filler in the biological pool. Because the specific surface area of ​​the filler is large, the oxygenation condition in the pool is good, and the biological volume per unit volume in the biological contact oxidation tank is higher than that of the activated sludge aeration tank and the biological filter, so the biological contact The oxidation pond has a high volumetric load;
Since a considerable part of microorganisms are fixedly grown on the surface of the filler, the biological contact oxidation method may not have a sludge reflux system, and there is no sludge expansion problem, and the operation and management are convenient;
The A/O biological method has higher impact load resistance and stable operation than the general biological treatment system.
The A/O biological treatment system converts NO2-N into N2, so there is no accumulation of NO2-N during nitrification, and 1mg/NO2-N causes 1.14mg COD value, so only nitrification, although ammonia nitrogen concentration may The standard is met, but the COD concentration often exceeds the standard. The A/O biological treatment system can not only solve the organic pollution, but also solve the nitrogen and phosphorus pollution, so that the ammonia nitrogen effluent index is less than 15mg/l. In short, after the process, all the indicators of the effluent can reach the "Sewage Integrated Emission Standard" GB8978-96.
3) Buried sewage treatment equipment process
The main process design of the sewage is as follows: the sewage after the sewage is polluted by the mechanical grille directly enters the regulating tank, and the purpose of setting the regulating tank is to adjust the water quantity and water quality of the sewage, in order to prevent sedimentation of the suspended matter in the regulating tank, the bottom of the regulating pool is provided Perforated aeration tube with gap aeration. The sewage has high organic content, BOD5/CODcr=0.5, and good biodegradability. Therefore, it is economical to use biological treatment methods to greatly reduce the organic matter content in the sewage. Due to the high content of ammonia nitrogen and organic matter in the sewage, especially organic nitrogen, organic nitrogen will be expressed in the form of ammonia nitrogen when biodegrading organic matter. Ammonia nitrogen is also an important pollution control indicator. Therefore, the treatment of oxygen is aerobic aerobic A/O. The biological contact oxidation process, that is, the biochemical pool needs to be divided into two parts: a pool and an O-class pool. The sewage in the regulating tank is lifted to the biochemical pool by the sewage lifting pump for biochemical treatment. In the pool, due to the high concentration of organic matter in the sewage, the microorganisms are in anoxic state. At this time, the microorganisms are facultative microorganisms, which convert organic nitrogen in the sewage into ammonia nitrogen, and the effluent water flows into the O-class pool, and the treatment of the O-class biochemical pool depends on The autotrophic bacteria (nitrifying bacteria) are completed, and they use the inorganic carbon source generated by decomposition of organic matter or carbon dioxide in the air as a nutrient source to convert ammonia nitrogen in the sewage into NO2--N and NO3--N. Part of the O-stage effluent water enters the sedimentation tank for precipitation, and another part is returned to the tank for internal circulation to achieve denitrification. At the same time, the organic carbon source is used as an electron donor to convert NO2--N and NO3--N into N2, and a new organic carbon source and ammonia nitrogen are also used to synthesize new cellular substances. Therefore, the pool not only has a certain organic matter removal function, but also reduces the organic load of the subsequent O-stage biochemical pool to facilitate the nitrification, and relies on the high concentration of organic matter in the sewage to complete the denitrification, and the zui end eliminates the eutrophication of nitrogen. Through the biochemical action of the pool, there is still a certain amount of organic matter and high nitrogen ammonia in the sewage. In order to further oxidize and decompose the organic matter, and at the same time the carbonization tends to be complete, the nitrification can proceed smoothly, and the O-level biochemistry is specially set. Pool. Fillers are installed in the O-class biochemical pool, and the entire biochemical treatment process is completed by a variety of microorganisms attached to the filler. The dissolved oxygen in the pool is controlled at about 0.5 mg/l; in the O-class biochemical pool, the dissolved oxygen is controlled at 3 mg/l or more, and the gas-water ratio is 15:1.
A part of the O-stage biochemical pool returns to the pool, and a part flows into the vertical flow sedimentation tank for solid-liquid separation.
The effluent after solid-liquid separation in the sedimentation tank flows into the disinfection tank and is discharged directly after being disinfected with solid chlorine tablets.
The sludge settled in the sedimentation tank is lifted to the pool by a gas stripping device, and is internally recycled; part of it is lifted to the sludge tank; the sludge in the sludge tank is regularly treated with manure treatment.
4) Sludge treatment process
Generally, there are two methods for sludge treatment in a small sewage treatment station: one is sludge dewatering mechanical dewatering; the other is sludge drying treatment. Considering the sludge decentralized mechanical dewatering treatment, the owner has a large investment, and the sludge concentration and drying treatment has an impact on the surrounding sanitation. Since the sludge digestion system is provided in the process, the amount of sludge generated is extremely small. For this reason, the sludge generated in the project is simply concentrated and treated, and the agricultural fertilizer is externally cleaned annually.
Sewage treatment equipment features
(1) The sewage treatment equipment has a simple structure, a small footprint, and is convenient for installation, operation and maintenance.
(2) The safety performance is strong and the equipment is unlikely to have an accident. The equipment has good airtightness, no irritating odor leakage, and no odor in the operating environment.
(3) High equipment grade: It can realize automatic detection of flow detection, dosing and residual chlorine detection, automatic control and dosing, and remote computer control, which can be used in different dosing sites, such as clearing water tanks, high water towers, and pressure Pipe network dosing, equipment running costs are low, saving costs!
Analysis of sewage water quantity and water quality
1) The uneven water in the project has a high degree of uneven water quality, and the water quality and water quantity vary greatly (KZ=2.0). Since the water quantity and water quality have large unevenness, it is necessary to consider setting a homogeneous and uniform quantity adjustment tank.
2) The BOD/COD value of this type of wastewater is about 0.5, which is biodegradable.
3) There are requirements for virus indicators in the emission requirements.
4) According to the requirements of the environmental protection department for sewage discharge, the sewage treatment process should be able to remove ammonia nitrogen in addition to removing organic matter, so that the effluent can meet the discharge requirements.
Operating cost estimate
1. Power consumption After the sewage treatment equipment is put into operation, the daily power consumption is 47.2 kw, and the electricity consumption per meter is 0.60 yuan/kw•h.
47.2×0.6=28.32 yuan/day
2, labor costs
After the sewage treatment equipment is running stably, no special person management is required.
3. Pharmacy fees
The drug consumption meter is 0.08 yuan / ton / hour. Disinfectant 3-5PPM, flocculant 10-15PPM
The cost of treating 1m3 of sewage is 0.316 yuan (depreciation of equipment is not calculated)
Sewage treatment process selection
(I) Application of different treatment processes Taking into account the above principles, the wastewater treatment process designed by this scheme is compared: With the continuous development of sewage treatment technology, the processes commonly developed in recent years at home and abroad are:
1. One-stage treatment process to enhance the treatment effect
For the comprehensive treatment of the effluent Zui into the secondary treatment urban sewage treatment plant, the treatment effect should be strengthened, the removal rate of ss should be increased, and the amount of disinfectant should be reduced. Strengthening the primary treatment effect should be achieved in two ways: to transform the existing primary treatment process to enhance the removal effect and to adopt the first-level strengthening treatment technology.
(1) Process flow
For the comprehensive (without infectious wards) sewage treatment, the process of “pretreatment→first-stage strengthening treatment→disinfection†can be adopted. The coagulation sedimentation (filtration) removes particles carrying viruses and germs, improves the disinfection effect and reduces the amount of disinfectant, thereby avoiding the adverse effects of excessive disinfectant dosage on the environment. First-level intensive treatment process (omitted)
The sewage enters the regulating tank through the septic tank, and the automatic grille is arranged at the front of the regulating tank, and the lifting pump is arranged in the regulating tank. After the sewage is lifted, it enters the coagulation sedimentation tank for coagulation and sedimentation. The effluent from the sedimentation tank enters the contact pool for disinfection, and the effluent from the contact pool reaches the standard discharge.
The garbage generated in the sewage treatment station such as the adjustment tank, the coagulation sedimentation tank, the sludge in the contact pool and the grid residue is concentrated and disinfected. Disinfection can be carried out by pasteurization or adding lime.
(2) Process characteristics
The first-stage strengthening treatment to enhance the treatment effect can improve the treatment effect, remove the particles carrying viruses and germs, improve the effect of subsequent deep disinfection and reduce the amount of disinfectant. The transformation of the existing primary treatment process can make full use of existing facilities and reduce investment costs.
(3) Scope of application
The first-stage strengthening treatment to enhance the treatment effect is suitable for the treatment of the effluent Zui into the secondary treatment of urban sewage treatment plants.
2, secondary treatment process
(1) Process description
The secondary treatment process is “regulation tank→biooxidation→contact disinfectionâ€. The sewage enters the conditioning tank through the septic tank. Adjust the front of the pool to set the automatic grille. The lifting water pump is arranged in the regulating tank. After the sewage is lifted, it enters the aerobic tank for biological treatment, and the effluent from the aerobic tank enters the contact pool for disinfection, and the effluent reaches the standard discharge.
The garbage generated in the sewage treatment stations such as the regulating tank, the biochemical treatment tank, the sludge in the contact pool and the grid residue are concentrated and disinfected and transported. Disinfection can be carried out by pasteurization or adding lime.
Secondary treatment process (non-infectious diseases and infectious disease sewage) (omitted)
The sewage and feces of infectious diseases are collected separately. The domestic sewage directly enters the pre-sterilization tank for disinfection treatment and then enters the regulation tank. The patient's feces should be disinfected independently, then enter the septic tank through the sewer or be treated separately (as indicated by the dotted line). Each structure shall be operated in a closed environment, and the air shall be ventilated through a unified ventilation system. The exhaust gas shall be discharged after disinfection, and the ultraviolet disinfection system may be used for disinfection.
(2) Process characteristics
The aerobic biochemical treatment unit removes organic pollutants such as codcr and bod5, and the aerobic biochemical treatment can select contact oxidation, activated sludge and high-efficiency aerobic treatment processes, such as membrane bioreactor and biological aerated filter. The high-efficiency aerobic treatment process with filtration function can reduce the concentration of suspended solids and facilitate subsequent disinfection.
(3) Scope of application
Applicable to infectious diseases (including integrated with infectious wards) and integrated sewage treatment discharged into natural waters.
(2) According to the scale, nature and treatment of sewage discharge, process selection. According to the classification, it is divided into infectious diseases and comprehensive. After the sewage treatment, the discharge is divided into two categories: discharge into natural water bodies and discharge into municipal sewage treatment plants through municipal sewers. The process used in sewage treatment must ensure that the treated water reaches the standard. The three main processes used are: primary treatment, secondary treatment and simple biochemical treatment to enhance the treatment effect. The principle of process selection is:
1. For small-scale integration in economically underdeveloped areas, simple biochemical treatment can be used as a transitional treatment when conditions are not available, and then secondary treatment or step-by-step treatment of enhanced treatment effects can be gradually realized.
2. Infectious diseases must be treated in two stages and pre-sterilized.
3. The comprehensive recommendation for treating the discharge of effluent into the urban sewer (the secondary sewage treatment plant is located downstream) adopts secondary treatment, and the treatment effect must be strengthened for the use of the primary treatment process.
4. Two-stage treatment must be adopted for counties and counties that discharge effluent into natural water bodies.
The nature of wastewater
1) Wastewater is contaminated by pathogenic microorganisms such as feces, infectious bacteria and viruses, which are infectious and can cause disease or cause injury;
2) Waste water contains toxic and harmful substances such as acid, alkali, suspended solids, BOD, COD and animal and vegetable oils;
3) Dental treatment, printing and laboratory processes produce heavy metals, disinfectants, organic solvents, etc., some of which are carcinogenic, teratogenic or mutagenic, endangering human health and have long-term effects on the environment;
4) Isotope treatment and diagnosis produce radioactive sewage. Radioisotopes produce a-, β-, and γ-radiation during the decay process, accumulating in the human body and endangering human health.
Sewage treatment equipment application range
1. Hotels, restaurants, nursing homes,
2. Residential quarters, villages, market towns;
3. Stations, airports, harbor terminals, ships;
4. Factory, mine, *, tourist spots, scenic spots;
5. Various industrial organic wastewater similar to domestic sewage.
Approach
The treatment method of sewage can be divided into: chlorine dioxide disinfection method, 1CASS biochemical method, MBR membrane bioreactor method
1. Chlorine Dioxide Disinfection Chlorine Dioxide is an efficient, broad-spectrum, safe, fast, multi-functional, long-lasting, convenient and convenient disinfectant for storage and use. The World Health Organization (WHO) lists it as safe. Disinfectant (A1) grade, approved by the US Environmental Protection Agency (EPA) and the US Food and Drug Administration (FDA) for use in, food processing and other sectors.
2. The ICASS biochemical CASS pool has a smaller volume and better effect through technological innovation and optimized design. This method continuously feeds water, but does not aerate. The concentration of organic matter is high, showing anoxic and anaerobic conditions, inhibiting the growth of good bacteria and controlling the sludge from expanding. The main reaction zone is divided into two parts, anoxic and aerobic, with aeration, sedimentation and drowning.
3. MBR membrane bioreactor membrane bioreactor method is a combination of ICASS and chlorine dioxide disinfection method, through the combination of physicochemical and biochemical methods to treat sewage, is currently using zui as a wide range of processes
Equipment inspection and equipment startup
1. Check the circuit when starting the equipment, whether the wiring control cabinet circuit is correct, and whether the voltage and current meet the requirements. The device control is controlled by microcomputer, controlled by imported programmable controller, and the output adopts AC contactor. The control cabinet can simultaneously control two sludge pumps and two fans, and combine real-time monitoring with working conditions, with automatic protection alarm function. There is also a manual, automatic control system. Check the pump line for leaks and water absorption when starting the pump, and if there is any blockage.
2. The pump of this equipment adopts the submersible sewage pump. When starting the fan, check whether the rotation direction is correct and avoid reverse rotation.
3. When the anaerobic pool has less sewage and the liquid level is lower than the pump starting liquid level, the two pumps stop working. At this time, in order to make the biofilm in the sewage equipment grow normally, the fan is intermittently started and started for 10 minutes. Stop running for half an hour.
4. The sludge in the sedimentation tank is controlled. The sludge pump is used to lift the mud. The sludge discharge period is 8 hours and the mud discharge time is 8 minutes. When the air is lifted, the two fans are started at the same time to ensure the supply of gas.
5. The equipment control center completes the work program in the micro-cabinet according to the design. (The manual control mode must not be used in special cases). The manual control is turned on and off by manually controlling the submersible sewage pump and fan through the button switch on the panel.
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