Anaerobic digester feed stream conditioning for increasing biogas production (Technical report 1)

Ng, Wun Jern and Trzcinski, Antoine and Wang, Chong and Tian, Xinbo (2012) Anaerobic digester feed stream conditioning for increasing biogas production (Technical report 1). Project Report. Nanyang Technological University , Singpaore. [Report]

Abstract

This first report provides information and the preliminary results from a two year study in progress at the Advanced Environmental Biotechnology Centre (AEBC-NEWRI) in Nanyang Technological University (NTU), investigating the feasibility of enhancing biogas production using advanced pre-treatment techniques. Various technologies have been developed for enhancement of anaerobic digestion (AD), increment in biogas yield, and reduction in residual sludge production. To reduce infrastructure and energy costs, there is a need to study methods to pre-treat sludge prior to AD to enhance the digestion process. Enhanced AD has the potential to both reduce the solids retention time and the hydraulic retention time in the digesters, while increasing biogas production, making the process more effective in terms of energy sustainability.

The use of pretreatment technologies (physical, chemical, thermal) for enhancing digestibility of thickened waste activated sludge (TWAS) has received considerable attention recently. In general, these technologies increase the rate of digestion and in some cases may enhance the ultimate digestibility as a result of decomposition of the sludge materials. A previous study conducted by PUB on sludge disintegration using ultrasound was found to be effective both in increasing biogas production and in reducing the amount of residual sludge solids for disposal. The project being conducted at NEWRI will seek to build on these results by evaluating combinations of ozone with ultrasound treatment to improve sludge disintegration and hydrolysis and therefore enhance anaerobic digestion.

This first progress report contains data and information on the raw WAS, the effect of ultrasonication as pre-treatment of WAS prior to anaerobic digestion, and some preliminary results on methane production potential obtained after ultrasonication.


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Item Type: Report (Project Report)
Item Status: Live Archive
Additional Information: Unpublished report.
Faculty / Department / School: No Faculty
Date Deposited: 19 Jul 2018 05:40
Last Modified: 06 Aug 2018 05:41
Uncontrolled Keywords: biogas production
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090409 Wastewater Treatment Processes
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
URI: http://eprints.usq.edu.au/id/eprint/34517

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