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Co-digestion of rice straw leachate and domestic wastewater for biogas production with addition of urea as nitrogen source


Citation

Idrus, Syazwani and Zhe, Sim Jian and Rosli, Nurul Shafiqah and Nik Daud, Nik Norsyahariati (2018) Co-digestion of rice straw leachate and domestic wastewater for biogas production with addition of urea as nitrogen source. International Journal of Engineering and Technology, 10 (1). pp. 76-81. ISSN 2319-8613

Abstract

This study investigates the methane production by anaerobic co-digestion of rice straw leachate (RSL) and domestic wastewater (WW). The experiment was conducted at a controlled mesophilic temperature of 38°C in Continuous Glass Reactor (CGR) for a period of approximately 12 weeks. The process performance was evaluated based on the efficiency of COD removal and methane production in relation to other parameters such as pH, (organic loading rate) OLR and alkalinity. This study confirmed that the rate of COD removal for co-digestion of WW and RSL achieved the stable condition at 89.33%, meanwhile the digestion of RSL with addition of urea was at 76.00%. The addition of urea into RSL, showed the synergistic effect in anaerobic digestion as the removal rate of COD increased from 61.33% to 76.00%. Meanwhile, methane production reached the highest value of 0.154 L/CH4 at day 32 with the COD conversion ratio of 81.33%. SEM analysis showed a change in surface structure of the granules and it was confirmed by EDX analysis that there was some light metal crystallisation and salt agglomeration on the sludge granule surface.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.7763/IJET.2018.V10.1038
Publisher: Engg Journals Publications
Keywords: Anaerobic co-digestion; Chemical oxygen demand; methane production; nitrogen and rice straw leachate
Depositing User: Ms. Ainur Aqidah Hamzah
Date Deposited: 14 Mar 2022 04:07
Last Modified: 14 Mar 2022 04:07
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.7763/IJET.2018.V10.1038
URI: http://psasir.upm.edu.my/id/eprint/44080
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