Abstract
Wastewater treatment systems contribute significantly to anthropogenic greenhouse gas emissions. The main greenhouse gases emitted during the wastewater treatment processes are methane (CH4), nitrous oxide (N2O) and carbon dioxide (CO2). Sequential batch reactor (SBR) is a type of an activated sludge process, and due to its high efficiency, currently, this is the preferred technology for the construction of new wastewater treatment plants (WWTPs). This study presents the estimation of greenhouse gas (GHG) emissions from SBR domestic wastewater treatment plants in Navi Mumbai, Maharashtra. We estimated direct emissions from wastewater treatment processes as well as indirect emissions due to energy usage during the treatment process. A total emission of ~35 kt CO2-eq/year was estimated for six SBR-based WWTPs having combined treatment capacity of 474 MLD. All except one of these plants were well managed. In the case of not so well-managed SBR plants, significant methane production occurs during the treatment process. In the long run, if these plants are not well managed, the emission could increase by three to fourfolds for the same treatment capacity. In either case, major GHG emissions are due to CH4 emission during the treatment process. The contribution of N2O is negligible towards total GHG emissions.
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Abbreviations
- MLD:
-
Million litre per day
- GHG:
-
Greenhouse gas
- CO2 :
-
Carbon dioxide
- CO2-eq:
-
Carbon dioxide equivalent
- WWTP:
-
Wastewater Treatment Plant
- N2O:
-
Nitrous oxide
- CH4 :
-
Methane
- GWP:
-
Global warming potential
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Singh, V., Phuleria, H.C., Chandel, M.K. (2018). Greenhouse Gas Emissions from Sewage Treatment Plants Based on Sequential Batch Reactor in Maharashtra. In: Singh, V., Yadav, S., Yadava, R. (eds) Climate Change Impacts. Water Science and Technology Library, vol 82. Springer, Singapore. https://doi.org/10.1007/978-981-10-5714-4_13
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DOI: https://doi.org/10.1007/978-981-10-5714-4_13
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