Effect of hydraulic retention time and sludge recirculation on greenhouse gas emission and related microbial communities in two-stage membrane bioreactor treating solid waste leachate

2016 ◽  
Vol 210 ◽  
pp. 35-42 ◽  
Author(s):  
Nararatchporn Nuansawan ◽  
Jarungwit Boonnorat ◽  
Wilai Chiemchaisri ◽  
Chart Chiemchaisri
Keyword(s):  
Microbial Communities ◽  
Greenhouse Gas ◽  
Solid Waste ◽  
Retention Time ◽  
Membrane Bioreactor ◽  
Hydraulic Retention Time ◽  
Greenhouse Gas Emission ◽  
Gas Emission ◽  
Two Stage ◽  
Waste Leachate

Evaluation of Greenhouse Gas Emission from Municipal Solid Waste Leachate by two-stage Sequencing Batch Reactor

2019 ◽  
Vol 4 (2) ◽  
pp. 35-42
Author(s):  
Nararatchporn Nuansawan ◽  
Kwannate Sombatsompop ◽  
Chayanid Witthayaphirom
Keyword(s):  
Municipal Solid Waste ◽  
Greenhouse Gas ◽  
Solid Waste ◽  
Sequencing Batch Reactor ◽  
Greenhouse Gas Emission ◽  
Batch Reactor ◽  
Gas Emission ◽  
Anaerobic Reactor ◽  
Aerobic Reactor ◽  
Waste Leachate

This work investigated greenhouse gas emission during the treatment of municipal solid waste leachate by two-stage Sequencing Batch Reactor (SBR). The SBR was carried out by anaerobic reactor followed by aerobic reactor. The system was operated at hydraulic retention times (HRT) of 4 and 2 days during 130 operating days. At steady state, the organic removal efficiencies were found to be 67.0% and 62.7% for 4 and 2 days of HRT. The organic carbon and nitrogen were mainly removed in aerobic reactor. The surface emission rates of methane in anaerobic reactor were 0.181 and 0.292 g/m2.d under HRT of 4 and 2 days, respectively. The emission factors of CH4 at HRT 4 and 2 days were 0.297 and 0.238 gCH4/gCOD, respectively while those of N2O were 0.25 and 0.19 gN2O/gN for HRT of 4 and 2 days, respectively. The PCR technique confirmed that the microbial group was methonogenic bacteria which corresponded to the emission of greenhouse gas. Type of Paper: Empirical Keywords: Greenhouse gas; leachate; methane emission; microbial communities; sequencing batch reactor

Greenhouse Gas Emission of Organic Waste Composting: A Case Study of Universiti Teknologi Malaysia Green Campus Flagship Project

2015 ◽  
Vol 74 (4) ◽  
Author(s):  
Hesam Kamyab ◽  
Jeng Shiun Lim ◽  
Tayebeh Khademi ◽  
Wai Shin Hod ◽  
Rahmalan Ahmad ◽  
...  
Keyword(s):  
Greenhouse Gas ◽  
Solid Waste ◽  
Agricultural Sector ◽  
Solid Waste Management ◽  
Greenhouse Gas Emission ◽  
Organic Fertilizer ◽  
Pilot Project ◽  
Gas Emission ◽  
The World ◽  
Green Campus

Waste generation nowadays is rising in the world and it seems hard to prevent it. Solid Waste Management (SWM) has been a major problem worldwide in most of the fast growing towns and cities among the developing countries all around the world. Food waste and green waste constitute high volumes of municipal solid waste (MSW). The application of compost in the agricultural sector can contribute to sustainable soil health and other co-benefits. The compost produced from biological waste does not contain any chemicals unfavorable to living soil. The objective of this research was to calculate the greenhouse gas emission from the compost processed from the food and green wastes generated on-campus in Universiti Teknologi Malaysia (UTM) as a pilot project. The result indicated that the composting process promotes the university as a green campus by converting organic wastes into valuable products such as organic fertilizer.

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