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/m(3) 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 CH(4) production rate was complex, first positive during the start-up but later on negative.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Liu J,Hu J,Zhong J,Luo J,Zhao A,Liu F,Hong R,Qian G,Xu ZPdoi
10.1016/j.biortech.2010.11.056subject
Has Abstractpub_date
2011-05-01 00:00:00pages
5466-72issue
9eissn
0960-8524issn
1873-2976pii
S0960-8524(10)01859-6journal_volume
102pub_type
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