污泥低温驯化及其对农村生活污水处理效果的研究

我国北方地区农村生活污水处理受低温影响严重。为解决此问题，通过低温驯化得到在8℃下对污水有较好处理效果的活性污泥，并对其污水处理效果进行分析。结果表明，用干重浓度为3.4 g?L-1的已驯化污泥对农村生活污水进行处理时，COD去除率最高为84.97%，出水COD最低为89.51mg?L-1，达到农田灌溉水质标准（GB 5084-2005）的最短处理时间为8d。与非驯化的污泥相比，驯化后活性污泥对污水的COD去除率提高了23.14%，这为北方地区农村生活污水处理提供了良好的技术支持。

Study on Low Temperature Acclimation of Sludge and its Effect on Rural Domestic Sewage Treatment

Rural domestic sewage treatment in northern of China is seriously affected by low temperature. In order to solve this problem, the activated sludge with good treatment effect on sewage at 8℃ was obtained by low temperature domestication, and its sewage treatment effect was analyzed. The results showed that when the domesticated sludge with dry weight concentration of 3.4g?L-1 was used to treat rural domestic sewage, the highest COD removal rate of the rural domestic sewage was 84.97%, the lowest COD of the effluent was 89.51 mg?L-1, and the shortest treatment time of reaching irrigation water quality standard of farmland (GB 5084-2005) was 8 days. Compared with the non-domesticated sludge, the COD removal rate of sewage after the activated sludge acclimated increased by 23.14%, which provided good technical support for rural domestic sewage treatment in northern of China.