投加生物激活剂和电子受体修复黑臭底泥的研究

Study on Remediation of Black-odor Sediment by Dosing Biostimulant and Electronic Acceptor

研究了单独投加生物激活剂(CVE)、联合投加CVE和电子受体对南京市南湖北河黑臭河道底泥修复效果的影响。结果表明:单独投加CVE、联合投加CVE和电子受体对底泥和上覆水体均有很好的修复效果,并且联合投加CVE和电子受体对底泥反硫化细菌的抑制和上覆水体TP去除的效果略优于单独投加CVE。试验80 d后联合投加CVE和电子受体组底泥TN和NH3-N分别降低了50.9%和62.1%,有机质削减率达到17.8%,底泥反硫化细菌数由开始时的31.3×103cfu/g(以干土计)减少到2.1×103cfu/g(以干土计);上覆水体COD,NH3-N,TP分别降低了74.8%,85.1%,83.9%,水质指标由劣Ⅴ类变为Ⅴ类。

The study aimed to discuss the remediation effects of separate dosing of biostimulant CVE and combined CVEand electronic acceptor in the black-odor river sediment of the north river of Nanhu Lake in Nanjing. Results showed thatthe remediation effects of urban rivers sediment and water could be improved by separate dosing CVE and combined dosingwith CVE and electronic acceptor. The remediation effects on inhibition of anti-sulfuration bacteria number in sediments andthe rapid removal of overlying water TP by combined dosing CVE and electronic acceptor was better than separate dosingCVE. After 80 days of experiment, the removal efficiency of TN, NH3-N and organic matters in sediments were 50.9%,62.1% and 17.8%, respectively. The quantity of anti-sulfuration bacteria reduced from 31300g-1dry sludge to 2100 g-1drysludge and the removal of the overlying water COD, NH3-N and TP were 74.8%, 85.1% and 83.9%, respectively. Thequality of water could reach grade 吁from inferior 吁according to the national standard for surface water.