改性竹炭曝气生物滤池处理生活污水的试验研究

THE EXPERIMENTAL STUDY ON TREATMENT OF DOMESTIC SEWAGE BY BIOLOGICAL AERATED FILTER OF MODIFICATED BAMBOO CHARCOAL

通过与陶粒、未改性竹炭的对比,研究氢氧化钾改性竹炭作为曝气生物滤池填料处理污水的效果。结果表明,改性竹炭系统从第6天起,对COD表现出与陶粒相当的处理能力,出水COD在30 mg/L以下;第7天起,对NH3-N的处理能力较好,出水NH3-N的质量浓度稳定在3 mg/L以下,而陶粒对NH3-N的处理效果不稳定;未改性竹炭的处理效果不佳。改性后竹炭的比表面积提高了近8倍,平均孔径从3.817 nm缩小到1.719 nm,以微孔为主。

The treatment effect of biological aerated filter by using bamboo charcoal modified by KOH （MBC） as filler was investigated. The effect was compared with haydite and bamboo charcoal without modification （BC）. The results showed the COD treatment ability of MBC system was equal to that of ceramic system after 6 days, and the COD of effluent was below 30 mg/L. The MBC system had better NH^-N treatment ability atter 7 d, and NH3-N concentration of effluent was below 3 mg/L, while the haydite system has a poor treatment ability of NH3-N. The treatment effect of BC is poor. The specific surface of bamboo charcoal enlarged by 8 times after modification, and the average pore size reduced from 3.817 nm to 1.719 nm, mainly microporous.