改良A^2/O工艺的运行及除磷实践

Experience in Modified A^2/O Process Operation

介绍了采用一种两点进水,一点进泥的改良A2/O工艺处理城市污水的方法,由多次实验室观测的数据来看,预缺氧段对硝酸盐氮的去除是有很大帮助的。同时还对该厂的除磷加药问题进行了深入的探讨。发现采用聚合铝铁对TP的去除率远远高于三氯化铁。旱季进水的碳源基本可以满足生物除磷的需要,只要投加少量除磷药剂就能达到出水水质要求,而雨季时则要加大除磷药剂的投加量。

This paper introduces a modified A2/O process used in a WWPT of Shenzhen City, investigating denitrification in the pre-anoxic tank and phosphorus removal by adding flocculant such as poly-iron-aluminum. It was found that carbon source in the influent is enough for biological TP removal in dry season, thus very small dosage of the flocculant is sufficient to maintain compliance with the emission standard.