Remediation of black-odorous urban rivers by using biostimulants combined with low intensity aeration

摘要

Biostimulant and low intensity aeration were used to restore black-odorous water body in Zhupai Creek, Nanning. After 60 days' experiment, results showed that the removal rate of COD_(cr), NH_3-N and TP were 46.8%, 98.7%and 73.3% respectively. The pH value of overlying water changed from 7.61 to 7.92 which would be beneficial to the release of P in the sediment. And the reduction of sediment reached to 5.49 cm. Hence, the remediation effects and speed of biostimulants to the black-odorous urban rivers can be improved greatly by using low intensity aeration.