Performance evaluation of upflow anaerobic sludge blanket reactor using immobilized ZnO nanoparticle enhanced continuous biogas production

Anwar Ahmad and Sajjala Sreedhar Reddy

Energy & Environment, 2020, vol. 31, issue 2, 330-347

Abstract: In this study, zinc oxide nanoparticles immobilized by methylenebisacrylamide were used for anaerobic consortium application and were examined for biomass retention capacity characterized in terms of volatile solids and specific methanogenic activity. The upflow anaerobic sludge blanket reactor was operated at various hydraulic retention times and was fed with palm oil mill effluent as a carbon source. The highest methane production rate of 510 mL CH 4 ·L −1 ·h −1 with a methane yield of 68.3 L CH 4 g −1 ·COD added was obtained at palm oil mill effluent concentration of 20 g COD·L -1 and 24 h of hydraulic retention time. The average biogas (4.5 L) showed methane content and chemical oxygen demand reduction of 84.5 and 95.7%, respectively. R max was 570 mL L −1 ·POME·h −1 at 15% of zinc oxide nanoparticles, with butyrate and acetic acid in an effluent contained when operated at a hydraulic retention time of 24 h and a palm oil mill effluent concentration of 20 g COD L −1 . A CO 2 reduction of 93.6% was obtained at 15% w/v loading of zinc oxide nanoparticle. Experiments demonstrated that with the granule bead size of immobilized zinc oxide nanoparticle of 3.99 mm, production of CH 4 and sequester of CO 2 were 650 m 3 ·d −1 and 456 m 3 ·d −1 , respectively. At 15% zinc oxide nanoparticle, granule leakage was found to be 0.065 mg·L −1 . It is significant that this is the first report on immobilized zinc oxide nanoparticle granule biomass for biogas production from wastewater.

Keywords: Immobilized zinc oxide nanoparticle; upflow anaerobic sludge blanket reactor; hydraulic retention time; biogas; CO2; granules (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://journals.sagepub.com/doi/10.1177/0958305X19865967 (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:sae:engenv:v:31:y:2020:i:2:p:330-347

DOI: 10.1177/0958305X19865967

Access Statistics for this article

More articles in Energy & Environment
Bibliographic data for series maintained by SAGE Publications ().