Parametric optimization and kinetic modelling for organic matter removal from agro-waste derived paper packaging biorefinery wastewater

The state-of-the-art paper packaging biorefinery utilizes cellulose fibrous material from paddy straw and papaya latex to produce products. This in turn generate wastewater with high organic matter content that if disposed without treatment will pollute water bodies affect aquatic life below water. Therefore, comply “clean sanitation” (SDG 6) “life water” 14), this study assesses the efficacy of an extended aeration activated sludge (EAAS) (PPBW) by employing straw-derived carbon as a biosorbent. Findings revealed system was able achieve 95–98.2% 90.62–94.96% biological oxygen demand (BOD5) chemical (COD) reduction, respectively. maximum removals were achieved at 2-day hydraulic retention time (HRT) 60% PPBW concentration. To evaluate substrate removal rates, first-order, modified Stover–Kincannon Grau second-order models used. In model, correlation coefficients values R2 0.99986 0.99991 obtained for COD BOD5, Twenty grams COD/L/day 50 gBOD5/L/day Umsr respectively, 20.402 g/L/day 56.295 KV constants BOD5 biokinetic constant rate kS 36 day?1 0.78 day?1, Here, 0.9989 0.99928 EAAS bioreactor described model proven best suit experimental data. can be used designing consequently predict behaviour. result provided benchmark actual implementation PSAC removal. It has been biosorbent sourced natural agro-waste is essential could efficient substance Operating expenses associated savings such PASC more attractive economic analysis demands. environmentally benign offers green option PPBW. alternative materials because it harmless human health proffer sustainable solution potable production.