【正文】
is difficult descending deposition of anic material occurs in the natural environment can be maintained indefinitely and disseminated, and thus a serious impact on the marine environment and ecological Third, medical sewage carrying pathogens, domestic sewage and industrial wastewater Pathogens, infectious agents, including pathogens, disease eggs, viruses. Pathogens can survive in the water can enter the body through the food chain, which make you sick fourth,Industrial wastewater containing anic matter and nutrients, sewage. Wastewater containing anic and nutrient substances that contain protein, fat, amino acids, carbohydrates and other ozonedepleting anic matter and nitrogen, phosphorus and other nutrients in wastewater Fifth, the heated waste Heated waste water emissions from therm