Department of Chemistry, CEG Campus, Anna University, Chennai, India.
Department of Chemistry, CEG Campus, Anna University, Chennai, India.
J Environ Manage. 2019 Sep 15;246:768-775. doi: 10.1016/j.jenvman.2019.06.039. Epub 2019 Jun 19.
A novel submerged membrane bioreactor integrated with ozonation and photocatalysis has been developed to treat the real textile wastewater and study the fouling behaviour. This study evaluates the performance efficiency in pilot-scale for the three reactors such as membrane bioreactor, ozonised membrane bioreactor and further clubbed with photocatalysis. The membrane filtration consists of polyvinilidine difluoride hollow fibre membrane module having pore size 0.1 μm. Tungsten oxide, a visible photocatalyst was made into spongy alginate beads and used in photocatalytic reactor. The photocatalyst dose has been optimised as 500 mg/L. About 10% membrane filterability ratio has been achieved by integrating ozone with MBR with the maximal ozone dosage of 5 g/h. It showed better removal efficiency in colour and chemical oxygen demand of 94% and 93% respectively. The biodegradability efficiency also was enhanced from 0.2 to 0.4 with optimised ozone dosage (5 g/h). The study on reversible and irreversible fouling has been done to understand the fouling nature. The important analysis such as microbial community and scanning electron microscopy analysis were done to study the biofouling and extent of fouling after filtration. The treatability studies implemented for textile wastewater showed that integrated MBR systems are suitable in meeting the discharge norms prescribed by the Indian statutory body in terms of chemical oxygen demand, colour and total suspended solids.
一种新型浸没式膜生物反应器与臭氧氧化和光催化相结合，用于处理实际的纺织废水并研究其污染行为。本研究在中试规模下评估了三种反应器的性能效率，即膜生物反应器、臭氧化膜生物反应器以及进一步与光催化相结合的反应器。膜过滤采用孔径为 0.1μm 的聚偏二氟乙烯中空纤维膜组件。氧化钨作为一种可见光催化剂，被制成海绵状海藻酸钠珠，并用于光催化反应器中。光催化剂剂量已优化至 500mg/L。通过将臭氧与 MBR 集成，最大臭氧剂量为 5g/h，可实现约 10%的膜过滤率。它在去除颜色和化学需氧量方面的去除效率分别达到了 94%和 93%。在优化的臭氧剂量（5g/h）下，生物降解效率也从 0.2 提高到了 0.4。为了了解污染性质，进行了可逆和不可逆污染的研究。进行了微生物群落和扫描电子显微镜分析等重要分析，以研究生物污染和过滤后的污染程度。对纺织废水的处理研究表明，集成的 MBR 系统适用于满足印度法定机构规定的化学需氧量、颜色和总悬浮固体的排放标准。
