钟落潭种猪场污水的活性污泥法处理

Aerobic activated sludge-stabilization pond process for piggery wastewater treatment at Zhongluotan Lean Swine Breeding Farm

钟落潭种猪场日排放COD值为15000mg·L^(-1) 以上的有机污水约150m^3·d^(-1),污水处理设计采用水解酸化—传统活性污泥—兼性塘组合方法,原污水经过粗格网筛、调解池、细格阿筛、水解酸化池、一级沉淀池、二级沉淀池、集水池、曝气池、二沉池和缓冲池,最后流入兼性塘,活性污泥通过污泥于化场得到干化。整个污水处理部分占地约150m×50m,兼性塘占地约6000m^2,系统正常运行后处理水可以达到“污水综合排放标准(GB8978-1996)”中规定的二级标准。

150 tons of sewage of which the COD was usually above 15 000mg*·L-1 was discharged from Lean Swine Breeding Center of Guangdong Academy of Agricultural Sciences for one day. Aerobic activated sludge - stabilization pond method was used to treat the sewage from the piggery. The raw sewage flowed through the coarse sieve screen, fine sieve screen, hydrolytic acidulation tank, primary settling tank, aeration tank, final settling tank and stabilization pond. The sludge was transported to the dewatering tank for desiccation. The total area of aerobic activated sludge treatment is about 150mx50m, and the stabilization pond sized 6 000 m2. The treated sewage from stabilization pond achieves the Second Class Drainage Standard according to 'The National Standard of Wastewater Overall Drainage (GB8978-88)' and can be used to irrigate for rice and other vegetable field directly.