Downstream Processing of Palm Oil Mill Effluent in a CBME Reactor

Damaraju, Madhuri; Bhattacharyya, Debraj; Panda, Tarun K.; Kurilla, Kiran Kumar

doi:10.1061/(asce)hz.2153-5515.0000484

Cited by 4 publications

(2 citation statements)

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“…It was seen that all the main effects, including pH, RT, and C, were positively associated, and the interaction terms including pH*pH, RT*RT, C*C, and RT*C were negatively associated with TN removal. The literature shows similar observations in the past (Damaraju et al, 2020a). The current was found to have a significant effect on main and quadratic terms.…”

Section: Resultssupporting

confidence: 83%

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Domestic wastewater treatment in a coupled sequential batch reactor‐electrochemical reactor process

Akula

Gaddam

Damaraju

et al. 2020

Water Environment Research

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The effectiveness of a sequenced biological–physicochemical reactor system for treating sewage was studied. The biological degradation was conducted in a Sequential Batch Reactor, which had innovative features for simplifying the operation and maintenance of the reactor. The reactor was operated at 4, 6, 8, and 12 hr cycle. Up to 82% removal of Chemical Oxygen Demand (COD), 50% removal of Dissolved Organic Carbon (DOC), 45% removal of Total Nitrogen (TN), and 45% removal of Total Phosphorus (TP) were achieved. The treated effluent was further polished in a continuous‐flow bipolar‐mode electrochemical reactor to remove additional recalcitrant organic matter from the wastewater. The process parameters were optimized using Response Surface Methodology. At the optimum condition (pH = 8.7; Current = 1.0; reaction time = 9.0), up to 90% removal of COD, 67% removal of DOC, 61% removal of TN, and 99.9% removal of TP were achieved in the coupled system. Micropollutants belonging to Pharmaceutically Active Compounds, pesticides, etc., were significantly removed. The coupled system completely removed Salmonella, Pseudomonas, and Staphylococcus. However, coliforms were detected at the outlet samples. A UV or ozone disinfection treatment is recommended for the safe reuse of the treated water for nonpotable purposes. Practioner points Sequential sequential batch reactor‐electrochemical reactor process (SBR‐ECR) technology is effective for micropollutant removal from sewage. The coupled SBR‐ECR system requires less footprint compared to conventional biological systems for wastewater treatment. Carbon material balance study revealed that more than 60% of carbon escapes from wastewater in the form of CO2

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Section: Resultssupporting

confidence: 83%

“…Flocs of Fe (OH) 3 are observed when the range of pH is more than 7. These flocs accelerate the process of adsorption by providing more surface area (Damaraju et al, 2020a). When pH is less than 6, indirect chemical oxidation may happen.…”

Section: Resultsmentioning

confidence: 99%