The effect of calcium on the treatment of fresh leachate in an expanded granular sludge bed bioreactor

Liu, Jianyong, Hu, Jun, Zhong, Jiangping, Luo, Jinghuan, Zhao, Aihua, Liu, Feng, Hong, Ruijing, Qian, Guangren and Xu, Zhi Ping (2011) The effect of calcium on the treatment of fresh leachate in an expanded granular sludge bed bioreactor. Bioresource Technology, 102 9: 5466-5472. doi:10.1016/j.biortech.2010.11.056


Author Liu, Jianyong
Hu, Jun
Zhong, Jiangping
Luo, Jinghuan
Zhao, Aihua
Liu, Feng
Hong, Ruijing
Qian, Guangren
Xu, Zhi Ping
Title The effect of calcium on the treatment of fresh leachate in an expanded granular sludge bed bioreactor
Journal name Bioresource Technology   Check publisher's open access policy
ISSN 0960-8524
1873-2976
Publication date 2011-05
Sub-type Article (original research)
DOI 10.1016/j.biortech.2010.11.056
Volume 102
Issue 9
Start page 5466
End page 5472
Total pages 7
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Collection year 2012
Language eng
Formatted abstract
This research investigated the calcium effect on the anaerobic treatment of fresh leachate in an expanded granular sludge bed (EGSB) bioreactor under mesophilic conditions. The observations show that the bioreactor, inoculated with anaerobic granular sludge, can be started up only in about 40 days for the treatment of calcium-containing fresh leachate with chemical oxygen demand (COD) removal efficiency above 90% and organic loading rate up to 72.84 kg COD/m3 day. The calcium accumulation onto the granules was monotonically related to the calcium concentration, accounting for 17–18 wt.% of Ca in the suspended solid in the form of calcium carbonate, phosphates/phosphonates and carboxylates. The mineral
formation significantly increased the granule settling velocity (by -50%) and the suspended solid concentration
(by 100%). However, the effect of calcium precipitation on the specific methanogenic activity
and the CH4 production rate was complex, first positive during the start-up but later on negative.
Keyword Fresh leachate
EGSB bioreactor
Granule settling
Calcium accumulation
Specific methanogenic activity
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Received 10 August 2010.Received in revised form 11 November 2010. Accepted 14 November 2010. Available online 19 November 2010

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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