CLC number: X52
On-line Access: 2015-04-03
Received: 2014-04-17
Revision Accepted: 2014-12-10
Crosschecked: 2015-03-10
Cited: 4
Clicked: 5115
Fan Bu, Xiang Hu, Li Xie, Qi Zhou. Cassava stillage and its anaerobic fermentation liquid as external carbon sources in biological nutrient removal[J]. Journal of Zhejiang University Science B, 2015, 16(4): 304-316.
@article{title="Cassava stillage and its anaerobic fermentation liquid as external carbon sources in biological nutrient removal",
author="Fan Bu, Xiang Hu, Li Xie, Qi Zhou",
journal="Journal of Zhejiang University Science B",
volume="16",
number="4",
pages="304-316",
year="2015",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B1400106"
}
%0 Journal Article
%T Cassava stillage and its anaerobic fermentation liquid as external carbon sources in biological nutrient removal
%A Fan Bu
%A Xiang Hu
%A Li Xie
%A Qi Zhou
%J Journal of Zhejiang University SCIENCE B
%V 16
%N 4
%P 304-316
%@ 1673-1581
%D 2015
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1400106
TY - JOUR
T1 - Cassava stillage and its anaerobic fermentation liquid as external carbon sources in biological nutrient removal
A1 - Fan Bu
A1 - Xiang Hu
A1 - Li Xie
A1 - Qi Zhou
J0 - Journal of Zhejiang University Science B
VL - 16
IS - 4
SP - 304
EP - 316
%@ 1673-1581
Y1 - 2015
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B1400106
Abstract: The aim of this study was to investigate the effects of one kind of food industry effluent, cassava stillage and its anaerobic fermentation liquid, on biological nutrient removal (BNR) from municipal wastewater in anaerobic-anoxic-aerobic sequencing batch reactors (SBRs). Experiments were carried out with cassava stillage supernatant and its anaerobic fermentation liquid, and one pure compound (sodium acetate) served as an external carbon source. Cyclic studies indicated that the cassava by-products not only affected the transformation of nitrogen, phosphorus, poly-β-hydroxyalkanoates (PHAs), and glycogen in the BNR process, but also resulted in higher removal efficiencies for phosphorus and nitrogen compared with sodium acetate. Furthermore, assays for phosphorus accumulating organisms (PAOs) and denitrifying phosphorus accumulating organisms (DPAOs) demonstrated that the proportion of DPAOs to PAOs reached 62.6% (Day 86) and 61.8% (Day 65) when using cassava stillage and its anaerobic fermentation liquid, respectively, as the external carbon source. In addition, the nitrate utilization rates (NURs) of the cassava by-products were in the range of 5.49–5.99 g N/(kg MLVSS⋅h) (MLVSS is mixed liquor volatile suspended solids) and 6.63–6.81 g N/(kg MLVSS⋅h), respectively. The improvement in BNR performance and the reduction in the amount of cassava stillage to be treated in-situ make cassava stillage and its anaerobic fermentation liquid attractive alternatives to sodium acetate as external carbon sources for BNR processes.
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