Evaluation of Submerged Anaerobic Fertilizer Driven Osmotic Membrane Bioreactor (AnFDOMBR) for Textile Wastewater Treatment

Abstract

An innovative anaerobic fertilizer driven osmotic membrane bioreactor (AnFDOMBR) was designed to evaluate its feasibility for treating textile wastewater. The results showed that, flux through membrane drops severely with time for mono ammonium phosphate (MAP) under the combined effect of salts accumulation and viscous nature of sludge. Average flux for each cycle was around 1.5 LMH. Salinity in bioreactor was amplified due to accumulation of influent salts and reverse solute flux (RSF) which led to inhibition of microbial activity, more production of soluble microbial products (SMP) and extra cellular polymeric substance (EPS) degradation with time. In FO permeate, COD removal was about 91 ± 4% and dye removal was 91 ± 2% due to high retention of FO membrane. On the contrary, supernatant of anaerobic bioreactor exhibited COD removal was 57 ± 5% and dye removal was 43.7 ± 6% due to deterioration of microbes inside bioreactor. AnFDOMBR has a potential to produce biogas due to biodegradation of organic waste retained by FO membrane.