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

Abstract

state-of-the-art paper packaging biorefinery utilizes cellulose fibrous material from paddy straw and papaya latex to produce packaging products. This in turn generate wastewater with high organic matter content that if disposed without treatment, will pollute water bodies, and affect aquatic life below water. Therefore, to comply with "clean water and sanitation" (SDG 6) and "life below water" (SDG 14), this study assesses the efficacy of an extended aeration activated sludge (EAAS) in the treatment of paper packaging biorefinery wastewater (PPBW) by employing paddy straw derived activated carbon as a biosorbent. Findings revealed that the system was able to achieve 95%-98.2% and 90.62%-94.96% biological oxygen demand (BOD5) and chemical oxygen demand (COD) reduction respectively. The maximum organic matter removals were achieved at 2-day hydraulic retention time (HRT) and 60% PPBW concentration. To evaluate substrate removal rates, the First order, Modified Stover-Kincannon and Grau second order models were used. In the Modified Stover-Kincannon model, high correlation coefficients values R 2 of 0.99986 and 0.99991 were obtained for COD and BOD5 respectively. 20 gCOD/L/d and 50 gBOD5/L/d were obtained as Umsr for COD and BOD5 respectively and 20.402 g/L/d and 56.295 g/L/d as KV constants for COD and BOD5 respectively. The COD and BOD5 biokinetic constant values for the Grau second order organic matter removal rate constant kS were 36 d -1 and 0.78 d -1 respectively. Here, 0.9989 and 0.99928 were the obtained R 2 values for COD and BOD5 respectively. The EAAS bioreactor system described by modified Stover-Kincannon model was proven to best suit the experimental data. Therefore, the model can be used in designing an EAAS system and consequently predict the bioreactor behavior. The result of this study provided a benchmark for the actual implementation of PSAC in PPBW treatment for COD and BOD5 removal. It has been proven that PSAC bio-sorbent sourced from a natural agro-waste material is essential and could be used as an efficient substance for organic matter removal. Operating expenses and associated savings were such that PASC was more attractive in an economic analysis of wastewater treatment demands. It is environmentally benign and offers a green treatment option to the PPBW. It could be an alternative to chemical materials because it is harmless to human health and proffer sustainable solution to potable water production.

Toxic Effects of Xenobiotic Compounds on the Microbial Community of Activated Sludge

“…The effects of PCP load on COD, NH 3 -N, and PCP removals were studied in a bioreactor treating recycled paper wastewater [142]. The bioreactor's stability and performance at various PCP loads suggest that joining biofilm and granular activated carbon (GAC) in the treatment under severe organic load variations could be beneficial.…”

C058 and Other Functional Microorganisms Promote the Synthesis of Extracellular Polymer Substances in Mycelium Biofloc

“…Catalysts 2022, 12, x FOR PEER REVIEW 2 of 14 [11]. Recent studies have shown that the bioaugmented biofloc efficiently purifies water, but the mechanism is not clearly described, in particular, the EPS synthesis [12][13][14].…”

“…They adhere to bacteria, fungi, algae, protozoa, and organic polymers, forming structurally diverse flocs using secreted extracellular polymer substances [9]. OBF removes ammonium nitrogen, total nitrogen, and total phosphorus from water through microbial assimilation and nitrification [10] and removes organic matter from water through biological adsorption [11]. Recent studies have shown that the bioaugmented biofloc efficiently purifies water, but the mechanism is not clearly described, in particular, the EPS synthesis [12][13][14].…”

Optimization by uniform design U8(83) approach for enhanced caffeine degradation in synthetic wastewater in bioreactor

“…2015; Jagaba et al . 2022). Accumulation of metal ions in wastewater can be effectively reduced by using nanomaterials as adsorbent (Jagaba et al .…”

“…Nanomaterial-mediated treatment methodologies are being studied to treat wastewater which targets significant contaminants like nitrate, phenols, total organic compounds (Azari et al 2014;Jalili Naghan et al 2015;Jagaba et al 2022). Accumulation of metal ions in wastewater can be effectively reduced by using nanomaterials as adsorbent (Jagaba et al 2020;Saeed et al 2021).…”