高效藻类塘系统处理太湖地区农村生活污水的中试研究

Pilot-scale research on high rate algal pond for rural domestic sewage treatment at area around Taihu Lake

采用二级串联高效藻类塘系统处理太湖地区农村生活污水的试验结果表明,水力停留时间为8 d条件下,该系统对CODCr、TN、TP的平均去除率分别为69．4％、41．7％、45．6％,该工艺对 NH3-N的处理效果很好,平均去除率达到了90．8％。高效藻类塘系统对CODCr、TN、TP的削减量分别为16．182 g／(m2·d)、1．904 g／(m2·d)、0．154 g／(m2·d)。与传统氧化塘相比,高效藻类塘具有占地面积小、停留时间短、对污染物处理效率高等特点,而且高效藻类塘系统设备简单,建设成本低,运行能耗低,系统启动快,基本无需专人管理,因此该工艺适合在气候温暖、阳光充沛的农村地区推广应用。

High rate algal pond （HRAP） has been developed from conventional stabilized pond. Pilot scale experiment was conducted on a HRAP system treating rural domestic sewage in Taihu Lake area, Jiangsu Province. The experimental results showed that in case when HRT= 8 d the average removals for COD, TN, and TP were 69.4%, 41.7% and 45.6% respectively. Specially, this system has good performance to remove ammonia nitrogen, average removal of 90. 8% has been obtained. The decrements of COD, TN and TP of this system are 16. 182 g/（m^2 · d）, 1. 904 g/（m^2·d） and 0. 154 g/（m^2 · d） respectively. Compared with conventional stabilized pond, HRAP has advantages such as smaller area occupation, shorter HRT and better removal efficiency. Besides, the investment and operation expenses are low. Therefore, this technology is suitable to apply in rural region, where the weather is warm and sunshine is unstinted.