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Volume 39 Issue 9
Jan.  2022
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WANG Hai-ping, LIU Feng, ZHENG Li-guo, WU Jin-shui, CHEN Xiang. MECHANISM OF PHOSPHORUS REMOVAL FROM BIOGAS SLURRY BY OEDOGONIUM SP.[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(9): 37-41. doi: 10.13205/j.hjgc.202109006
Citation: WANG Hai-ping, LIU Feng, ZHENG Li-guo, WU Jin-shui, CHEN Xiang. MECHANISM OF PHOSPHORUS REMOVAL FROM BIOGAS SLURRY BY OEDOGONIUM SP.[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(9): 37-41. doi: 10.13205/j.hjgc.202109006

MECHANISM OF PHOSPHORUS REMOVAL FROM BIOGAS SLURRY BY OEDOGONIUM SP.

doi: 10.13205/j.hjgc.202109006
  • Received Date: 2021-01-21
    Available Online: 2022-01-21
  • It is a kind of green economy wastewater treatment method to use the optimized microalgae for secondary treatment of swine wastewater, which has considerable application prospect. Combining isotope tracer method and path analysis, the phosphorus metabolic and mechanism analysis in biogas slurry by Oedogonium sp. were studied, in order to provide theoretical basis for practical application of Oedogonium sp. in digested wastewater treatment. During the experiment, Chl-a content in the biogas slurry reached 3.35 mg/L, 3.13 times of the initial content, and the TP removal rate was 91.22%. The analysis of TP removal mechanism showed that the microbial residues in the wastewater had little influence on TP removal. It was difficult to form gaseous phosphine from biogas slurry into the atmosphere under aerobic state. About 30% of TP was removed by phosphate precipitation under alkaline condition with the synergistic effect of cation such as Ca2+ and Mg2+. TP decrease was mainly caused by the algal incorporation and phosphate precipitation. About 60% of TP was removed by microalgae assimilation. The DO value should be reduced and the N/P ratio should be maintained for further improving TP removal rate.
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