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( Wang Yunlong ),( Shen Alin ),( An Wenhao ),( Yu Man ),( Luo Ancheng ),( Jeongryeol Jang ) 한국농공학회 2015 한국농공학회 학술대회초록집 Vol.2015 No.-
Lake Tai is one of the four famous lakes in China. With the development of economy, the environmental pollutions have been brought, resulting in the deterioration of water quality in Lake Tai. West Tiaoxi River is one of the important rivers into the lake in Anji county. Statistically, the discharge of rural domestic pollutants COD, TN, TP into Tiaoxi River annually area bout 3074t,329t and 57t respectively. Therefore many works have been carried out for the pollution problems. The treatment usually contains anaerobic hydrolysis pre-treatment and oxygen filtration process. In this project a low-cost bamboo bio-filter was developed to improve the anaerobic treatment efficiency. The composite medium filter technology for oxygen filtration process has been optimized in the same time. The results in lab showed that the nitrogen and phosphorus removal capacity of the treatment facilities were improved after the optimization. Finally, an enhanced nitrogen and phosphorus removal system was integrated and built into the equipment constructions with a capacity of 120 t/d, which has been applied in five towns and more than 30 happy farm-houses in Anji County. Most of the final effluent could meet the discharge standards, or even better. By 2017 the construction of all demonstration area in county will be completed. The work about surface water source pollution control technology will be promoted. The TN, TP and other pollutants must be decreased by 15% by the time. And more than 90% of the surface water in the county will meet the standard of surface water environment functional area. The quality of water in the county boundary will thus be more stable for Lake Tai.