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Environmental Engineering Research 2025;30(1): 240130 DOI: https://doi.org/10.4491/eer.2024.130
Simultaneous biomethane optimization and wastewater treatment using isolated acclimatized bacterial strains in baker yeast effluent
Mueed Akhtar1,2, Murid Hussain1  , Nadeem Tariq3, Farrukh Naeem3, Parveen Akhter4, Aqeel Ahmed Bazmi1, Iqra Saqib3, Amna Sadiq3, and Yong Jun Choi5 
1Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore, Pakistan
2BECS Analytics, Site # 469, Sundar Industrial Estate, Raiwind Road, Lahore, Pakistan
3Microbial BioTechnologies (Pvt) Ltd., Plot # 41, Tariq Ismail Road Link Raiwind Road, Lahore, Pakistan
4Department of Chemistry, The University of Lahore, 1-km Defence Road, Off Raiwing Road, Lahore, Pakistan
5School of Environmental Engineering, University of Seoul, Seoul, 02504, South Korea
Corresponding Author: Murid Hussain ,Tel: +92-42-111 001 007, Email: drmhussain@cuilahore.edu.pk
Yong Jun Choi ,Tel: +82-2-6490-2873, Email: yongjun2165@uos.ac.kr
Received: March 2, 2024;  Accepted: May 27, 2024.
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ABSTRACT
The Baker yeast industry wastewater is a substantial environmental concern because of industrial contamination, representing a large reservoir of untapped resources. Anaerobic digestion (AD), a multi-stage biological process, can promote sustainability by producing methane (CH4) from baker’s yeast effluent. This manuscript presents a novel method for isolating bacterial strains from animal remnants and effluent produced during baker's yeast manufacturing. The method is intended to preferentially discover bacterial strains that not only can survive but also show increased growth and metabolic activity in particular environmental circumstances. The bacterial consortia, which was kept separate, not only reduced the incubation duration by five days but also decreased BOD and COD levels by 45% and 51.3%, respectively. Additionally, it increased the purity of methane to 73%. This technique proposes a hopeful method for treating industrial effluents with high levels of COD and BOD, which is in line with the objective of achieving zero discharge and promoting water recycling. AD as compared to membrane filtration, coagulation, electrocoagulation, ozonation, aerobic digestion is feasible and economical process. Sustainability is ensured by production of methane and wastewater treatment.
Keywords: Anaerobic digestion | Acclimatized bacteria | Baker yeast effluent | Chemical oxygen Demand | Enzymes
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