Urban sewage is collected through sewer drain all, is discharged into the sewer system, a variety of domestic sewage, industrial wastewater and urban runoff of rain water mix, which several types of sewage each have their own characteristics. Sewage is discharged daily life water quality characteristics such wastewater containing high organic matter, such as starch, protein, fat, etc., also contain pathogenic microorganisms and more suspended solids, and industrial waste, as a result of industrial production technology, raw materials, water conditions are not the same equipment, the nature of industrial wastewater is vastly different, it's the big difference between water quality and quantity, with a high concentration of toxic characteristics, should be treated before it is discharged to a certain extent in the factory. Urban sewage treatment according to its characteristics, most of which is water, solids only about 0.03% to 0.06%, urban sewage BOD is generally 75 ~ 300mg / L. According to different requirements of the purification of sewage, waste water treatment step can be processed. A treatment by sieving, gravity sedimentation and flotation methods in series, to remove most of the wastewater in the 100μm diameter or larger particulate matter. Sieve can remove large substances; gravity settling to remove coarse particles and inorganic particles have a specific gravity slightly greater than organic flocculation property 1; flotation can remove particles smaller than a specific gravity of (oils, etc.). Wastewater after treatment, usually reach the emission standards. To adopt biological secondary treatment and flocculation method. Biological mainly after primary treatment to remove organic matter in wastewater; flocculation method is mainly after primary treatment to remove suspended solids in wastewater and inorganic colloidal particles or low concentrations of organic matter. Flocculation method to use PAC, PAC high removal efficiency, with less convenient and easy to get, cheap, fast settling floc, small. Easily separated from the water and the like. Biological waste water treatment method is the use of microbial methods. By structures in the role of microorganisms in the wastewater biodegradability of organic matter decomposition of inorganic substances in order to achieve the purpose of purification. After secondary treatment of wastewater, usually can reach the standard of agricultural irrigation and wastewater discharge standards. But some of the water and remain suspended solids, biological decomposition of dissolved organic matter can not, and the solubility of inorganic nitrogen, phosphorus and other nutrients, and contain viruses and bacteria, under certain conditions, may still cause pollution of natural water bodies. National toll-free: 400-770-3343 For more information about please visit our website: PAM: www.lebangshui.com www.gylbjs.com PAC: www.lb0371.com Tel: Manager Wu Mobile: 13783609559 Tel: 0371-66488833 Wang Mobile: 13838568817 Tel: 0371-66488876