Xuzhou hospital sewage treatment equipment \ Changzhou medical wastewater treatment plant Demacian

Xuzhou hospital sewage treatment equipment \ Changzhou medical hospital sewage wastewater treatment plant origin and complex composition, containing pathogenic microorganisms, toxic, harmful physical and chemical pollutants and radioactive pollution, etc., with space pollution, acute infection and latent infection and other features, not After effective treatment will become an important way for the spread of disease and serious environmental pollution. Hospital sewage contamination by fecal pathogenic microorganisms, such as bacteria and viruses infectious, contagious, can cause disease or injury. Hospital wastewater containing acid, alkali, suspended solids, BOD, COD and plant and animal oils toxic and hazardous substances. Dental treatment, photofinishing and testing process produces waste water containing heavy metals such as disinfectants, organic solvents, and some have carcinogenic, teratogenic or mutagenic, have harmful long-term effects on human health and the environment. Produce radioactive isotopes sewage treatment and diagnosis. Radioisotopes produced a-, β- and γ- radioactive decay process, accumulate in the body and endanger human health. Xuzhou hospital sewage treatment equipment \ Changzhou hospital medical waste water treatment plant sewage treatment equipment in principle the entire process control principles. Hospital sewage produced, processed, the whole process of emission control. Minimization principle. Strict hospital within the health and safety management system, occurs in sewage and dirt at the source of strict control and separation of sewage and hospital wards were collected sewage that source control, decontamination triage. Do the hospital freely dispose of sewage and dirt into the sewer. Situ treatment principles. To prevent hospital sewage contamination during transport and hazards in hospitals must situ treatment. Classification guidelines. According to hospital nature, scale, sewage discharge destination and regional differences in hospital sewage processing guidance. Compliance with the principle of combining risk control. Full account of the basic requirements of general hospitals and infectious disease hospital wastewater discharge standards, while strengthening risk control awareness, improve the ability to deal with unexpected events from technology, engineering, construction and supervision of management. Ecological security principles. Effective removal of toxic and hazardous substances in wastewater, reducing process disinfection byproducts to produce and control the excessive chlorine in water, protect the environment safe. The main means of disposing buried integration equipment is currently used more mature biological contact oxidation. Quality of design parameters according to the general design of sewage water quality, according to the influent COD: 200-300mg / l meter, water COD≤50mg / l meter, consisting of a total of six parts: (1) the primary settling tank (2) contact oxidation pond (3 ) secondary settling tank (4) pool disinfection, sterilization equipment (5) sludge tank (6) Fan Room, wind turbines. (1) buried at the beginning of the integration of sewage treatment equipment sedimentation tank: general primary settling tank for vertical flow sedimentation pool. Sewage upflow velocity sedimentation tank of 0.2-0.3 mm / sec, sludge settling down with air to raise the sludge tank. (Note: DSW0.5-5m3 / h with no primary sedimentation tank) contact oxidation pond (2) buried integrated sewage treatment equipment: artesian water to contact the primary settling tank after biochemical treatment, contact tank is divided into three level, the total residence time of 4-6 hours, the filler is combined filler, easy conjunctiva, is not blocked, the specific surface area of ??the filler 160m2 / m3, the gas-water ratio in the contact tank 12: 1 or so. (Note: DSW0.5-5m3 / h contact pool for two) (3) water treatment equipment of the secondary settling tank: biological wastewater gravity after the secondary settling tank, secondary sedimentation tank for vertical flow sedimentation tank, the flow rate was increased 0.1-0.15 mm / sec, raised to a septic tank sludge or sludge tank. Disinfection tank (4) buried integrated sewage treatment equipment: according to specifications (TJ14-74) standard for 30 minutes, if the hospital sewage, disinfection tank to increase the residence time of 1.5 hours. Contact disinfection using chlorine tablets dissolved solids disinfection, can changing the size of water dosage to achieve more water pay more drugs, less water and less dosing purposes according to the disinfection unit. Require additional disinfection device can be formulated separately. (Note: If used for industrial wastewater or direct drainage, pool disinfection and sterilization devices can not) sludge tank (5) buried integrated sewage treatment equipment: the beginning of all sludge sedimentation tank, secondary sedimentation tank are air upgrade to septic tanks or aerobic sludge digestion, sludge is returned to the pool of supernatant re-contact oxidation pond treatment sludge digestion rarely, usually 1-2 years to clean up once the suction cleaning method available Sinotrans to post suction truck from a septic tank or tank bottom sludge inspection hole extends into the pool. Fan room (6) buried integrated sewage treatment equipment, fans: fan room located at the top of the pool disinfection, fan room on imports of double glazed, air inlet muffler, fan filter, so running the noise is small, fan with two sets of Roots blower, can automatically run alternately, a single wind turbine operating life of over 30,000 hours. "Integrated Wastewater Discharge Standard" now performed (GB18466-2005), the hospital sewage receiving water their different functions, such as the provisions of the corresponding number of fecal coliform and chlorine standards, COD, SS and other physical and chemical indicators None special requirements, just to meet the requirements of other sewage units are relatively low standards, and give only the lower chlorine without limit. According to current standards, the existing low level of hospital wastewater treatment process, mainly (1) high suspended solids concentration and disinfection; (2) water quality fluctuations, disinfectant dosage is difficult to control; (3) the amount of disinfection byproducts generated large, affect the safety of the ecological environment; (4) the standard chlorine-free limit, excessive chlorine harm ecological security and other issues. Xuzhou hospital sewage treatment equipment \ Changzhou medical hospital wastewater treatment plant wastewater treatment equipment and technology selection process based on the size of the hospital principle, the nature and treatment of sewage discharge destination, for process selection. Classified according to hospital, divided into infectious diseases hospitals and general hospitals. Sewage discharge destination after hospital discharged into natural water bodies and municipal sewage discharged by municipal sewage treatment plant categories. Hospital wastewater treatment process must be used to ensure that the effluent standards, there are mainly three processes: the effect of enhanced primary treatment treatment, secondary treatment and simple biochemical treatment. Process selection principles are: the use of two infectious disease hospitals must deal with, and the need for a pre-disinfection. Treated effluent discharged into natural water bodies and above the county hospital must adopt secondary treatment. Treated effluent discharged into the city sewer (downstream has two sewage treatment plants) recommended two general hospital treatment, the use of a treatment process must strengthen the treatment effect.