生物可渗透性反应墙修复受污染地下水

Remediation of Contaminated Groundwater by Biologically Permeable Reactive Barrier Filled with Waste Tire Rubber Particles

针对地下水污染严重的问题,基于可渗透性反应墙(PRB)技术,采用废旧轮胎胶粒作为载体,联合硫酸盐还原菌(SRBD)和二沉池污泥(AS),构建胶粒-SRBD和胶粒-AS可渗透性生物修复系统,并处理含COD、SO24-、NH4+-N、Fe2+、Mn2+的受污染地下水,对以胶粒为载体的PRB生物修复系统的可行性和有效性进行研究。结果表明,胶粒-SRBD柱和胶粒-AS柱由于所含生物活性材料的不同,对各污染物表现出不同的去除效果,平均去除率分别为69.5%、82.5%、25%、92.6%、70%和73.2%、63.1%、68%、95.2%、54.2%。综合考虑除污效果和胶粒与污泥的资源化利用,胶粒-AS系统适于该受污染地下水的修复。

To address the problem of serious groundwater contamination, two biologically permea- ble remediation systems filled with waste tire rubber particles coupled with sulfate reducing bacteria （RP- SRB） and activated sludge （RP-AS） were developed based on the permeable reactive barrier （PRB）. The feasibility and efficiency of RP-SRB and RP-AS biologically permeable remediation systems for trea- ting the contaminated ground water containing COD, SO4^2-, NH4＋ - N, Fe2＋ and Mn2＋ were studied. The results showed that the removal rates of the pollutants by RP-SRB and RP-AS columns were different due to their different biological active materials. The average removal rates were 69.5%, 82.5% , 25%, 92.6% and 70% by RP-SRB column and 73.2% , 63.1% , 68% , 95.2% and 54.2% by RP-AS col- umn, respectively. Considering pollutant removal efficiency and reclamation of rubber particle and sludge, the RP-AS system is feasible for remediation of contaminated groundwater.