IMPROVEMENT OF BIOLOGICAL FERTILIZER EFFICIENCY OF SLUDGE COMPOST PRODUCTS BY ADDING AUXILIARY MATERIALS

HUANG Jun-xi; YAN Xing; LEI Fang; CEN Yu-ming; HUO Ying-yi; XIAO Yue-qi; ZHONG Shi-cong

doi:10.13205/j.hjgc.202103020

Volume 39 Issue 3

Jul. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(3): 142-147

HUANG Jun-xi, YAN Xing, LEI Fang, CEN Yu-ming, HUO Ying-yi, XIAO Yue-qi, ZHONG Shi-cong. IMPROVEMENT OF BIOLOGICAL FERTILIZER EFFICIENCY OF SLUDGE COMPOST PRODUCTS BY ADDING AUXILIARY MATERIALS[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 142-147. doi: 10.13205/j.hjgc.202103020

Citation:

HUANG Jun-xi, YAN Xing, LEI Fang, CEN Yu-ming, HUO Ying-yi, XIAO Yue-qi, ZHONG Shi-cong. IMPROVEMENT OF BIOLOGICAL FERTILIZER EFFICIENCY OF SLUDGE COMPOST PRODUCTS BY ADDING AUXILIARY MATERIALS[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 142-147. doi: 10.13205/j.hjgc.202103020

Citation:

HUANG Jun-xi, YAN Xing, LEI Fang, CEN Yu-ming, HUO Ying-yi, XIAO Yue-qi, ZHONG Shi-cong. IMPROVEMENT OF BIOLOGICAL FERTILIZER EFFICIENCY OF SLUDGE COMPOST PRODUCTS BY ADDING AUXILIARY MATERIALS[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 142-147. doi: 10.13205/j.hjgc.202103020

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IMPROVEMENT OF BIOLOGICAL FERTILIZER EFFICIENCY OF SLUDGE COMPOST PRODUCTS BY ADDING AUXILIARY MATERIALS

doi: 10.13205/j.hjgc.202103020

Guangzhou Sewage Purification Co., Ltd, Guangzhou 510163, China

Received Date: 2020-03-11
Available Online: 2021-07-19

Abstract

Abstract

In order to explore the effect of adding auxiliary materials on aerobic composting, the experiment was set up to add auxiliary materials including sawdust, mushroom residue, microbial fermentation bacteria and acidified biochar for aerobic co-composting. Based on the highest temperature and days with temperature higher than 50℃, the optimal composting ratio was as follows:sludge proportion of 66.9%, microbial fermentation bacteria of 0.1%, sawdust of 20%, mushroom residue of 8% and biochar of 5%. Under this ratio, the highest temperature of compost reached 69℃ on the fourth day, and high temperature duration of 50℃ above were 15 days, which met the requirements of harmless composting index. The contents of TKN, TP and TK were higher, which were 3.76 g/kg, 0.65 g/kg and 1.08 respectively; the germination index GI increased gradually with the extension of composting time, and the highest GI value was 156%; then the composting products were used for soil improvement, and through the cultivation of konjac, it was found that the survival rate of konjac was higher in the wasteland after soil improvement. The concentration of heavy metals in the leaching solution of compost products and improved soil samples was low, so it's not easily to enter the natural environment or cause secondary pollution.
- sludge composting,
- orthogonal experiment,
- microbial fermentation,
- soil improvement,
- konjac

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References(23)

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