摘要
为开发城市黑臭河道的有效治理方法，利用人工模拟河道就河道底泥对上覆水体的二次污染、底泥污染生物修复对其氮磷营养盐释放及河道水体污染生物修复的影响进行了研究，并对实验结果进行了工程现场应证。研究结果表明：河道污染底泥生物修复状况对上覆水体水质产生大的影响，在底泥不加修复时，底泥污染物释放使水体COD、TP、NH3-N浓度分别达到30～35mg／L、0．4～0．5mg／L和3．0mg／L，底泥修复后分别为15～20mg／L、0．1mg／L和2．5mg／L；底泥G值（Y）与底泥氮、磷污染物释放量（x）呈负相关关系，关系式分别为：y=0．5124x^-0.1394（R^2=0．9222），y=0．17772x^-0.4781（R^2=0．8701）；结合底泥的生物修复，采用曝气增氧．投加生物制剂措施对水体进行生物修复时COD、NH3-N和PO4^3-的去除率分别提高13．6％、25．0％和15．7％；对古廖涌的现场治理工程表明，在未对河道底泥进行生物修复的情况下，经过氧化塘预处理-河道水体增氧-水体原位强化生物修复等措施的治理，河道中、下游水体又逐渐恢复黑臭，在对河道底泥进行修复后，河道污染水体水质得到显著的改善和提高。
In order to find out the effectively treatment technologies of polluted urban river, the effects of polluted sediments on the quality of river water, and polluted sediments bioremediation on its release of nutrition and on the bioremediation of polluted urban.river water were studied by the use of the simulated river, and research results were proved in the pilot plants. The results showed that the polluted sediments could affect the quality of upper water significantly. The concentration of COD, NH3-N and TP in the river water would reach 30 -35 mg/L, 0.4 -0.5 mg/L and 3.0 mg/L when the polluted sediments were not treated, but only 15 - 20 mg/ L, 0. 1 mg/L and 2.5 mg/L when the polluted sediments were treated. There was a negative correlation between G index（y） and the quantity of nitrogen or phosphorus （x） released from sediments：y = 0. 5124x^-0.1394（ R^2= 0. 9222） and y = 0. 17772x^-0.4781 （R^2 = 0. 8701 ）. When the polluted sediments was treated effectively, the removal rates of COD, NH3-N and PO4^3- of river water bioremediation could be improved 13.6% , 25.0% and 15.7% , respectively. In the operation of Guliao River bioremediation project, the fiver water could be purified significantly when polluted sediments were treated together with the river water treatment technologies such as oxidation pond, oxygenation and in situ bioremediation, hut the downstream river water would maintain poor quality water when the polluted sediments were not treated.
出处
《环境工程学报》
CAS
CSCD
北大核心
2009年第8期1447-1453,共7页
Chinese Journal of Environmental Engineering
基金
广东省重大科技专项(2004A3040402)
关键词
城市河道
底泥
水体污染
修复
影响
urban river
sediments
water pollution
remediation
effect
作者简介
谢丹平（1980-），男，工程师，硕士，主要从事水污染控制技术研究。E-mail：xie_dp@scies．com．cn
