城市中每天都有大量的生活污水和工业污水排出,污水中,含有丰富的有机物质和营养盐类,只要污水中不含有毒物质,都可以用来养鱼。城郊鱼塘,利用污水来养鱼,可以大大地降低成本,改良环境。 1.池塘条件和设施。利用污水养鱼的池塘,面积一般不宜过小,这样,池塘对污水的分解,净化能力大,水质控制容易,池水深度一般为2～3米为宜,污水养鱼池必 Every day in the city, there is a large amount of domestic wastewater and industrial wastewater discharged. Sewage water is rich in organic substances and nutrients. As long as the wastewater contains no toxic substances, it can be used for fish farming. Suburban fish ponds, the use of sewage to fish, can greatly reduce costs and improve the environment. 1. Pond conditions and facilities. The use of sewage ponds, the general size of the area should not be too small, so that the decomposition of sewage ponds, purification capacity, easy to control water quality, water depth is generally 2 to 3 meters is appropriate, sewage fish ponds will