生活污水的危害
Hazards of domestic sewage
生活污水的危害有很多，这里列举出最主要的三种。1.病原物污染：主要来自城市生活污水、医院污水、餐厅废、机场、酒店、小区等。2.有机物污染：有机物的共同特点是这些物质直接进入水体后，通过微生物的生物化学作用而分解为简单的无机物质二氧化碳和水，
There are many hazards of domestic sewage. Here are the three main ones. 1. Pathogen pollution: mainly from urban domestic sewage, hospital sewage, restaurant waste, airport, hotel, community, etc. 2. Organic pollution: the common feature of organic matter is that after these substances directly enter the water body, they are decomposed into simple inorganic substances carbon dioxide and water through the biochemical action of microorganisms,
3.总磷及氨氮污染：是一种氮、磷等植物营养物质含量过多所引起的水质污染现象。水生生态系统的富营养化能通过化学污染物由两种途径发生：一种是通过正常情况下限定植物的无机营养物质的量的增加；另一种是通过作为分解者的有机物的增加。
3. Total phosphorus and ammonia nitrogen pollution: it is a water pollution phenomenon caused by excessive content of nitrogen, phosphorus and other plant nutrients. Eutrophication of aquatic ecosystems can occur in two ways through chemical pollutants: one is to limit the increase of inorganic nutrients of plants under normal conditions; The other is through the increase of organic matter as decomposer.