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- 저자 : Sethupathi Sumathi (검색결과 2 건)
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Areeb Shehzad,Mohammed J. K. Bashir,Sumathi Sethupathi,Jun-Wei Lim,Muhammad Younas 한국자원공학회 2016 Geosystem engineering Vol.19 No.6
Increasing awareness of the energy–environment centers leads to the development of new technologies that have a direct impact on energy production and consumption during environmental remediation. Bioelectrochemical system (BES) is anticipated to be the emerging technology for the simultaneous removal/recovery of resources such as energy, nutrients, water, and heavy metals. Organic compounds inside the leachate are oxidized by micro-organisms which in turn lead to the production of energy and other value-added resources. Through the integration of membrane process such as forward osmosis in BES will help to recover the high-quality water for applications like agricultural. Recovery of metals is largely affected by uncertainty in concentration but still recovery of metal is achievable in leachate. Phosphorous and ammonia can be recovered through cathode reduction reactions driven by electricity generation. Low bioavailability of landfill leachate is one of the major challenges for BES which can be improved through proper pretreatment of landfill leachate. Another challenge of achieving the metal recovery from leachate is the low concentration of heavy metals. System scaling up remains as a great confront, especially for BES as energy production and consumption balance needs to be well understood. This review paper identified the key challenges, opportunities, and future recommendations for the recovery of resources from leachate using BES.
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Meghdad Pirsaheb,Mitra Mohamadi,Amir Mohammad Mansouri,Ali Akbar Lorestani Zinatizadeh,Sethupathi Sumathi,Kiomars Sharafi 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.7
We evaluated the feasibility and treatment performance of a continuous feeding and intermittent discharge (CFID) bioreactor treating real hospital wastewater with the emphasis on simultaneous carbon, nitrogen and phosphorus (CNP) removal. The experiments were based on a central composite design (CCD) and analyzed by response surface methodology (RSM). To analyze the process, three significant variables, aeration time (2-4 h), mixing time without aeration (30-90 min) and MLSS concentration (2,000-6,000mg/l), were studied. Results show that an increase in aeration time increased the nitrogen and phosphorous removal efficiency. However, when the aeration time was more than 3 h, the efficiency of phosphorous removal was decreased due to insufficient acidification. A similar scenario was observed when mixing time was increased for phosphorus and nitrogen removal efficiency. MLSS had a positive effect on all the responses. Under optimal conditions, the concentrations of quality parameter in the influent in average were recorded as 586 mg COD/l, 296mg BOD5/l, 97mgTN/l and 16.47mg TP/l, which yields the following removal efficiencies, 95.6%, 98.3%, 88.0% and 92.0%, respectively.
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