Analysis of samples and anaerobic biodegradability of sludges from Jurong and Ulu Pandan water reclamation plants (Report 1)

Ng, Wun Jern and Trzcinski, Antoine P. and Ganda, Lily (2013) Analysis of samples and anaerobic biodegradability of sludges from Jurong and Ulu Pandan water reclamation plants (Report 1). Project Report. Unpublished . [Report]


Methane yields from waste activated sludge is reported to be in the range 0.116 – 0.318 L CH4/g VS degraded (Kim et al., 2003, Sosnowski et al., 2008). Methane potential from Ulu Pandan has been reported to be 0.292 L CH4/g VS fed (Trzcinski et al., 2013), but there is no data about the anaerobic biodegradability of the enhanced primary sludge that will be produced in PUB plants (Ulu Pandan and Jurong) in Singapore. The enhanced primary treatment or biosorption is expected to produce a new type of sludge with cells accumulating carbon as storage materials and also carbon entrapped in the extra-cellular matrix. Because of this biosorption it is expected to reduce considerably the production of conventional activated sludge in the subsequent step. In order to validate this process it is necessary to determine how much methane can be produce from this new type of sludge. Because of the carbon storage of the cell or biosorption it is expected that the methane yield will be higher than a conventional activated sludge.
PUB is planning the construction a new water reclamation plant located in Tuas. The completion is due in 2022. This plant will be designed to receive and treat both domestic and industrial used water.
To evaluate the suitability of potential technologies for domestic used water treatment in the mentioned plant, PUB is constructing a 1,000 m3/day validation plant at Ulu Pandan WRP. The validation plant is targeted for commissioning in October 2013. Following the validation of various technologies and treatment processes in Ulu Pandan WRP, PUB intends to demonstrate the selected treatment processes on a larger scale in Jurong WRP. A demonstration plant is slated to be commissioned in 3rd Quarter, 2015, focusing on domestic used water treatment. Both WRP (Ulu Pandan and Jurong) will be producing sludges as a mixture of enhanced primary and waste activated sludges. It is desirable to investigate the best combination of sludge in order to optimize the biogas production. The number of samples from each is expected to be as follows:
1. 120 samples over 18 months (from November 2013) from Ulu Pandan WRP. Two samples per week on average.
2. 50 samples over 6 months (from July/August 2013) from Jurong WRP. Two samples per week on average.

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Item Type: Report (Project Report)
Item Status: Live Archive
Additional Information: Unpublished report.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 30 Jul 2018 05:02
Last Modified: 11 Mar 2019 01:08
Uncontrolled Keywords: wastewater treatment plants
Fields of Research (2008): 09 Engineering > 0904 Chemical Engineering > 090409 Wastewater Treatment Processes
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Fields of Research (2020): 40 ENGINEERING > 4004 Chemical engineering > 400410 Wastewater treatment processes
40 ENGINEERING > 4011 Environmental engineering > 401102 Environmentally sustainable engineering
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering

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