污泥基吸附剂强化MBR工艺污水处理效能

Study on Sludge-Based Adsorbent Strengthening Membrane Bioreactor for Wastewater Treatment

利用ZnCl_2作为活化剂对化学污泥进行活化,制备成吸附剂材料应用于膜生物反应器(MBR)工艺。在平行运行条件下对单独MBR工艺(MBR1)、污泥基吸附剂(SA)-MBR工艺(MBR2)与粉末活性炭-MBR工艺(MBR3)处理城市污水效能进行比较研究。结果表明,在反应器内形成的生物SA的吸附与生物降解的综合作用下,MBR2对有机物的去除效能与MBR3相近,并且优于MBR1。MBR2较MBR1与MBR3能在较低的跨膜压差下维持着可持续的通量(12.5 L/(m2·h)),这说明在SA含有的铁、铝化合物的影响下,MBR工艺的膜污染情况得到改善。MBR2的膜后出水重金属含量达到水质标准。

The chemical sludge was activated with ZnCl_2 as activator to prepare adsorbent which applied in membrane bioreactor（MBR）. In a comparative study of parallel operating conditions, individual MBR（MBR1）, sludge-based adsorbent（SA）-MBR（MBR2） and powdered activated carbon-MBR（MBR3）were investigated in wastewater treatment efficiencies. The results showed that, under combined adsorption and biodegradation effects of biological SA formed in the reactor, MBR2 removal efficiency of organic matter was similar with MBR3, and better than MBR1. Experiment of critical flux showed that compared with MBR1 and MBR3, MBR2 could maintain a sustainable flux（12.5 L/（m^2·h）） at low transmembrane pressure, indicating that under the influence of SA containing iron, aluminum compound, membrane fouling improved in MBR. Furthermore, the contents of heavy metals in the effluent of MBR2 achieved water quality standards.