Combined treatment of domestic and pulp and paper industry wastewater in a rice straw embedded activated sludge bioreactor to achieve sustainable development goals

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Jagaba, Ahmad Hussaini and Kutty, Shamsul Rahman Mohamed and Baloo, Lavania and Birniwa, Abdullahi Haruna and Lawal, Ibrahim Mohammed and Aliyu, Mohammed Kabir and Yaro, Nura Shehu Aliyu and Usman, Abdullahi Kilaco (2022) Combined treatment of domestic and pulp and paper industry wastewater in a rice straw embedded activated sludge bioreactor to achieve sustainable development goals. Case Studies in Chemical and Environmental Engineering, 6. 100261. ISSN 2666-0164 (https://doi.org/10.1016/j.cscee.2022.100261)

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Abstract

The pulp and paper industry has been recognized as one of the largest users of water worldwide. Water is used in nearly every step of the manufacturing process. It generates significant amounts of wastewater and leftover sludge, creating several problems for wastewater treatment, discharge, and sludge disposal. Adopting the most effective and economical treatment techniques before discharging wastewater is therefore crucial. Thus, this study aims to evaluate the performance of the activated sludge bioreactor system (ASBS) for the treatment of pulp and paper industry wastewater (PPIW). The PPIW was characterized. During the experiment, the domestic and PPIW wastewater were run at a fixed HRT of 1 day. Subsequently, the ASBS was evaluated by varying the HRT and OLR. The HRT was varied in the range of 3, 2, and 1 day. At a fixed HRT of 2 days, the maximum and minimum COD removal were 88.4 and 63.2%. Throughout the study, the ASBS demonstrated higher treatment efficiency in terms of COD removal. First order, Grau second order, and modified Stover Kincannon biokinetic models were applied for the study. The biokinetic investigation shows that the modified stover kinetic model was more appropriate for the description of the experimental data in terms of microbial growth parameters. Thus, the kinetic coefficients obtained in this study could be used for the bioreactor scale-up. The study has also proven that the biosorbent made from biomass waste can potentially help preserve non-renewable resources and promote zero-waste attainment and principles of a circular bioeconomy.

ORCID iDs

Jagaba, Ahmad Hussaini, Kutty, Shamsul Rahman Mohamed, Baloo, Lavania, Birniwa, Abdullahi Haruna, Lawal, Ibrahim Mohammed ORCID logoORCID: https://orcid.org/0000-0002-4130-9739, Aliyu, Mohammed Kabir, Yaro, Nura Shehu Aliyu and Usman, Abdullahi Kilaco;
CORE (COnnecting REpositories)