Potential of anaerobic co-digestion in improving the environmental quality of agro-textile wastewater sludge

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dc.contributor.author Tapsoba, Jean G.
dc.contributor.author Komakech, Hans C.
dc.contributor.author Ouma, Johnson Odera
dc.date.accessioned 2021-02-15T15:03:10Z
dc.date.available 2021-02-15T15:03:10Z
dc.date.issued 2020-08-30
dc.identifier.uri https://doi.org/10.2166/wst.2020.360
dc.identifier.uri https://dspace.nm-aist.ac.tz/handle/20.500.12479/1121
dc.description This research article published by IWA publishing en_US
dc.description.abstract Sludge from textile effluent treatment plants (ETP) remains a challenge for many industries due to inefficient and limited waste management strategies. This study explores the potential of using anaerobic digestion (AD) to improve the environmental quality of textile ETP sludge. The AD of ETP sludge is affected by the low C/N ratio (3.7), heavy metal content, and toxicity. To improve the process, co-digestion of ETP sludge with different substrates (sewage sludge, cow dung, and sawdust) under mesophilic conditions (37 °C), followed by a thermochemical pretreatment was assessed. The results showed that anaerobic co-digestion of the textile sludge with the co-substrates is effective in reducing pollution load. It was found that organic matters degraded during the 30-day AD process. The chemical oxygen demand and biological oxygen demand reduction was in the range of 33.1–88.5% and 48.1–67.1%, respectively. Also, heavy metal (cadmium, lead, iron, and, mercury) concentration was slightly reduced after digestion. Maximal biogas yield was achieved from co-digestion of textile sludge and sewage sludge at a mixing ratio of 3:1, 1:1, and 1:3, and methane content was respectively 87.9%, 68.9%, and 69.5% of the gas composition. The results from this study show that co-digestion will not only reduce the environmental pollution and health risks from the textile industry but also recover useful energy. en_US
dc.language.iso en en_US
dc.publisher IWA Publishing en_US
dc.subject Anaerobic digestion en_US
dc.subject Sludge management en_US
dc.subject Textile sludge en_US
dc.subject Wastewater treatment plant en_US
dc.title Potential of anaerobic co-digestion in improving the environmental quality of agro-textile wastewater sludge en_US
dc.type Article en_US

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