TY - JOUR
T1 - Effect of fermentation liquid from food waste as a carbon source for enhancing denitrification in wastewater treatment
AU - Zhang, Yongmei
AU - Wang, Xiaochang C.
AU - Cheng, Zhe
AU - Li, Yuyou
AU - Tang, Jialing
N1 - Funding Information:
This work was supported by the Natural Science Foundation of China (No. 50838005 ), the Program for Innovative Research Teamin Shanxi Province (Grant no. 2013KCT-13 ).
Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - Food wastes were used for anaerobic fermentation to prepare carbon sources for enhancing nitrogen removal in wastewater treatment. Under anaerobic conditions without pH adjustment, the fermentation liquid from food wastes (FLFW) with a high organic acid content was produced at room temperature (25 °C) and initial solid concentration of 13%. Using FLFW as the sole carbon source of artificial wastewater for biological treatment by sequence batch operation, maximized denitrification (with a denitrification rate of VDN = 12.89mg/gVSS h and a denitrification potential of PDN = 0.174 gN/gCOD) could be achieved at a COD/TN ratio of 6. The readily biodegradable fraction in the FLFW was evaluated as 58.35%. By comparing FLFW with glucose and sodium acetate, two commonly used chemical carbon sources, FLFW showed a denitrification result similar to sodium acetate but much better than glucose in terms of total nitrogen removal, VDN, PDN, organic matter consumption rate (VCOD) and heterotrophy anoxic yield coefficient (YH).
AB - Food wastes were used for anaerobic fermentation to prepare carbon sources for enhancing nitrogen removal in wastewater treatment. Under anaerobic conditions without pH adjustment, the fermentation liquid from food wastes (FLFW) with a high organic acid content was produced at room temperature (25 °C) and initial solid concentration of 13%. Using FLFW as the sole carbon source of artificial wastewater for biological treatment by sequence batch operation, maximized denitrification (with a denitrification rate of VDN = 12.89mg/gVSS h and a denitrification potential of PDN = 0.174 gN/gCOD) could be achieved at a COD/TN ratio of 6. The readily biodegradable fraction in the FLFW was evaluated as 58.35%. By comparing FLFW with glucose and sodium acetate, two commonly used chemical carbon sources, FLFW showed a denitrification result similar to sodium acetate but much better than glucose in terms of total nitrogen removal, VDN, PDN, organic matter consumption rate (VCOD) and heterotrophy anoxic yield coefficient (YH).
KW - Anaerobic fermentation
KW - Carbon source
KW - Denitrification potential
KW - Denitrification rate
KW - Food waste
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U2 - 10.1016/j.chemosphere.2015.09.036
DO - 10.1016/j.chemosphere.2015.09.036
M3 - Article
C2 - 26408975
AN - SCOPUS:84953739699
SN - 0045-6535
VL - 144
SP - 689
EP - 696
JO - Chemosphere
JF - Chemosphere
ER -