TITLE

Efficient Recovery of Carbon, Nitrogen and Phosphorus from Chicken Manure by A Three-stage Countercurrent Anaerobic Digestion Process

AUTHOR(S)
Xuejing Hu; Xiaoling Liu; Zhengbo Yue; Jing Wang; Yonghui Song
PUB. DATE
August 2014
SOURCE
Advanced Materials Research;2014, Vol. 1010-1012, p1010
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Three-stage countercurrent anaerobic digestion as a novel anaerobic fermentation process was applied to improve the biogas production and nitrogen and phosphorus release ratio from chicken manure. The digestion performance of each stage (H1, H2 and H3) for producing biogas, biomethane, NH4+-N and PO43--P was investigated. Results showed that the maximum biogas production ratio and cumulative biogas were achieved by H1, and their values reached 714 mL/d and 8636 mL, respectively. Compared with H2 and H3, the cumulative biogas from H1 increased by 45.6% or more. CH4 content remained relatively stable in H1, and its average value was 68%, which was a little higher than that in H2 and H3. Moreover, NH4+ -N and PO43--P levels which were released during anaerobic digestion of chicken manure arrived at 6.4 g/L and 230.6 mg/L in H1, and they were approximately 27% and 7% more than the other two stages, respectively. The results indicated that the three-stage countercurrent anaerobic digestion process could reduce the inhibitory effect of ammonia and VFAs on anaerobic microorganisms.
ACCESSION #
99604857

 

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