Journal
DESALINATION AND WATER TREATMENT
Volume 54, Issue 4-5, Pages 1061-1069Publisher
DESALINATION PUBL
DOI: 10.1080/19443994.2014.903526
Keywords
Anaerobic fermentation; Bacterial community; Waste activated sludge; Nutrient removal; Carbon source
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Funding
- National High-tech Research and Development Projects (863) of China [2012AA063603-02]
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To analyze the effect of sludge fermentation liquid on succession of bacterial community as carbon source, a three-month-long experiment was conducted in anaerobic-anoxic-aerobic process at room temperature. Experimental results showed that the removal efficiencies of total nitrogen and total phosphorus were improved to 84.7 and 94.3% from 64.5 and 54.2% at flow ratio of fermentation liquid and municipal wastewater, 1:35. Meanwhile, the principal component analysis demonstrated that significant shifts of bacterial community were observed with fermentation liquid addition. In particular, fermentation liquid appeared to be selective for the phosphorus-removal bacteria Gammaproteobacteria, denitrifying bacteria Comamonas sp., nitrogen-removal bacteria Betaproteobacteria, and denitrifying phosphate accumulating organisms Sphingobacterium, indicating simultaneous nitrification and denitrification, and denitrifying dephosphatation might be present after fermentation liquid addition.
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