Waste Water Treatment : the waste water reaches a drainage water or reused water quality requirements, and its purification process. Sewage treatment is widely used in construction, agriculture, transport, energy, petrochemical, environmental protection, urban landscape, medical, food and beverage and other fields, more and more into the daily life of ordinary people.
The classification of the sources of sewage, sewage treatment is generally divided into production and waste water treatment system and sewage treatment. Production of sewage, including industrial wastewater, agricultural runoff, and medical sewage, domestic sewage is sewage generated daily life is a complex mixture of various forms of inorganic and organic, including: (1) floating and suspended the size of the solid particles; (2) plastic shape and gel diffusion material; (3) pure solution.
Points, according to the quality of the water pollution water pollution are two types: one is natural pollution; the other is a man-made pollution. Of water against the larger man-made pollution. Water pollution can be divided into chemical pollution, physical pollution and biological contamination three categories, depending on the contaminants. Main pollutants: ⑴ without industrial wastewater treatment emissions; the ⑵ untreated sewage emissions; (3) extensive use of chemical fertilizers, pesticides, herbicides, irrigation and sewage; (4) stacked industrial waste water treatment process and household garbage in the river ; (5) soil erosion; ⑹ mine effluent.
Method of treating sewage, generally can be grouped into physical, chemical and biological methods.