EFFECT OF BIOCHAR ON COMPOSITION OF SMP AND EPS IN ACTIVATED SLUDGE AND NITROGEN AND PHOSPHORUS REMOVAL

CHEN Jin-yuan; LIU Xue-wen; LV Ju-feng; LV Bo-sheng; WEI Xiu-zhen

doi:10.13205/j.hjgc.202009022

Volume 38 Issue 9

Nov. 2020

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(9): 133-138,207

CHEN Jin-yuan, LIU Xue-wen, LV Ju-feng, LV Bo-sheng, WEI Xiu-zhen. EFFECT OF BIOCHAR ON COMPOSITION OF SMP AND EPS IN ACTIVATED SLUDGE AND NITROGEN AND PHOSPHORUS REMOVAL[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(9): 133-138,207. doi: 10.13205/j.hjgc.202009022

Citation:

CHEN Jin-yuan, LIU Xue-wen, LV Ju-feng, LV Bo-sheng, WEI Xiu-zhen. EFFECT OF BIOCHAR ON COMPOSITION OF SMP AND EPS IN ACTIVATED SLUDGE AND NITROGEN AND PHOSPHORUS REMOVAL[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(9): 133-138,207. doi: 10.13205/j.hjgc.202009022

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EFFECT OF BIOCHAR ON COMPOSITION OF SMP AND EPS IN ACTIVATED SLUDGE AND NITROGEN AND PHOSPHORUS REMOVAL

doi: 10.13205/j.hjgc.202009022

College of Environment, Zhejiang University of Technology, Hangzhou 310014, China

Received Date: 2019-09-05

Abstract

Abstract

Effect of biochar powders prepared from different biomass materials on the composition (content of protein (PN) and polysaccharide (PS)) of soluble microbial products (SMP) and extracellular polymers (EPS) in activated sludge were studied using SBR process. MLVSS/MLSS changes of activated sludge and the nitrogen and phosphorus content of wastewater were analyzed. The results showed that the content of protein in activated sludge SMP decreased by 62.26%~76.58% after adding biochar, and the content of protein in activated sludge EPS increased by 17.83%~32.84%. However, the effect of biochar on the content of PS in activated sludge was not obvious. Activated sludge added with biochar contained more amino acids or tryptophan, tyrosine and phenylalanine in the protein. Pig manure biochar (PMB) showed the most obviously effect on activated sludge, and there were more aromatics and nucleic acids in the freeze-dried EPS. The added biochar acted as the connecting bridge which increased the size of sludge flocs, changed the growth and metabolism environment of the microorganisms. Then, the amount of microorganisms in the sludge increased significantly, and the conversion efficiency of nitrogen was improved obviously. Ammonia nitrogen was converted to nitrite nitrogen rapidly and reached a relative high concentration. At the same time, the activated sludge showed better phosphorus removal effect after adding biochar.
- activated sludge,
- biochar,
- soluble microbial products,
- extracellular polymeric substances

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