Department of Civil Engineering, Annamalai University, Annamalai Nagar, 608002, Tamil Nadu, India.
Environ Sci Pollut Res Int. 2011 May;18(4):649-54. doi: 10.1007/s11356-010-0409-9. Epub 2010 Nov 10.
Textile dyeing and sago industries are the most polluting industries in South India, especially in industrial cities like Salem, Tamil Nadu, where textile dyeing and sago industries are clumped together geographically. Conventional physicochemical treatment followed by biological processes for the effluent generated from these industries are ineffective, costlier and produce huge quantities of hazardous sludge and harmful by-products which requires further treatment and safe disposal. Hence, the development of an alternative treatment method will become important. The main objective of this investigation is to establish a sustainable biotreatment technology for the treatment of textile dyeing effluent using sago effluent as co-substrate in a two-phase upflow anaerobic sludge blanket (UASB) reactor.
In this study, influence of hydraulic retention time (HRT) in a two-phase UASB reactor treating textile dyeing effluent using sago effluent as co-substrate was investigated with different HRTs (36, 30, 24 and 18 h) with an optimum mixing ratio of 70:30 (sago to textile dye wastewaters).
The results revealed that the HRT had a high influence on the chemical oxygen demand (COD) and colour removal. The maximum COD removal efficiency of 39.4% and 88.5% and colour removal efficiency of 43.7% and 84.4% in the acidogenic and methanogenic reactors, respectively was achieved at 24 h of HRT. The biogas production was 312 L/day.
The biphasic UASB reactor could be a very feasible alternative, cost-effective, eco-friendly and sustainable treatment system for textile dyeing effluent with sago effluent as a co-substrate.
纺织印染和西米加工业是印度南部污染最严重的行业，特别是在泰米尔纳德邦的 Salem 等工业城市，这些地区的纺织印染和西米加工业集中在一起。这些行业产生的废水采用传统的物理化学处理方法结合生物处理工艺效果不佳，成本高昂，而且会产生大量危险污泥和有害副产物，需要进一步处理和安全处置。因此，开发替代处理方法将变得非常重要。本研究的主要目的是利用西米废水作为共基质，在两相上流式厌氧污泥床（UASB）反应器中建立一种可持续的生物处理技术，用于处理纺织印染废水。
在这项研究中，采用不同水力停留时间（HRT）（36、30、24 和 18 小时），并以最优混合比例 70:30（西米对纺织印染废水），研究了两相 UASB 反应器处理纺织印染废水时水力停留时间的影响。
结果表明，HRT 对化学需氧量（COD）和色度去除有很大影响。在 HRT 为 24 小时时，产酸相和产甲烷相中 COD 去除效率分别达到 39.4%和 88.5%，色度去除效率分别达到 43.7%和 84.4%。沼气产量为 312 L/天。
两相 UASB 反应器可以作为一种非常可行的替代方法，具有成本效益高、环保和可持续性的特点，可用于处理纺织印染废水，并将西米废水作为共基质。
