液氨丝光废水控制技改工程实例

Control Example of Liquid Ammonia Light Wastewater

液氨丝光废水是印染行业中采用液氨对布面进行丝光整理产生的废水,其具有NH_3-N含量高,有机物含量少及水量少等特点。采用曝气生物滤池(BAF)对液氨丝光废水先行硝化,然后再进入水解酸化池中进行反硝化的方法进行处理。当处理150 kg/d的NH_3-N时,曝气生物滤池(BAF)的填料负荷平均为0.6 kg/(m^3·d)(以NH_3-N计),去除率为64.9%,硝化后的液氨废水回流到水解酸化池反硝化后,TN去除率为89%,总运行成本为504元/d,其NH_3-N的去除成本为3.78元/kg。

In dyeing and finishing of textile industry, ammonia containing wastewater is produced from liquid ammonia mercerizing treatment process which use liquid ammonia to swell cotton fabrics. It has the characteristics of high ammonia- nitrogen content and little organic content with small amount of volume. In this paper, the liquid ammonia mercerization wastewater is nitrified first and denitrified in hydrolysis-acidification tank. When the inlet amount of ammonia-nitrogen for the system reaches 150 kg/d, the packing load of BAF is 0.6 kg/（m3＂d） in average, and the removal rate is 64.9%. The nitrified liquid ammonia mercerization wastewater is sent to the hydrolysis acidification tank. The total nitrogen removal rate is 89%. The total operating cost is 504 RMB/d, and the unit ammonia nitrogen removal cost is 3.78 RMB/kg.