【摘要】 对微氧颗粒污泥降解五氯酚(PCP)过程中,主要影响因素溶解氧浓度(DO)、pH值、PCP负荷以及外加碳源浓度的作用规律进行了研究。实验结果表明,DO浓度较高时,不仅不利于PCP脱氯,而且吹脱作用会导致周围空气污染;而在微氧浓度范围,适当增加DO浓度,有利于PCP彻底脱氯;pH值在6.7～7.5范围内,对PCP及中间氯酚产物、CODCr的去除率效果最好;PCP负荷增加引起PCP和CODCr去除率以及产气量的下降。更多还原

【Abstract】 In this paper, effects of restrictive ecological factors such as dissolved oxygen (DO) concentration, pH, PCP loading rate and concentration of glucose on the system were studied. Experimental results showed that increasing of DO concentration in microaerobic range was in favor of PCP dechlorination, however, disadvantage effects might occur when DO concentration was beyond this range. PCP and COD_ Cr removal rates decreased when pH was lower than 6.7 or higher than 7.5. There was no obvious effect on PCP and COD_ Cr removal when PCP loading rate was less than 1.5×10 -2 kg/(m 3·d). Appropriate increase of glucose concentration was favored the degradation of PCP and COD_ Cr, but excessive high concentration caused negative effect.更多还原