EFFECT OF EXOGENOUS ADDITIVES ON PHOSPHORUS MOBILIZATION IN PHOSPHORUS-RICH COMPOSTING OF KITCHEN WASTE

CHANG Yuan; ZHAN Yabin; TAO Xingling; LIU Yongdi; ZHANG Kui; YU Bo; WEI Yuquan; LI Ji

doi:10.13205/j.hjgc.202210015

Volume 40 Issue 10

Oct. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(10): 112-119

CHANG Yuan, ZHAN Yabin, TAO Xingling, LIU Yongdi, ZHANG Kui, YU Bo, WEI Yuquan, LI Ji. EFFECT OF EXOGENOUS ADDITIVES ON PHOSPHORUS MOBILIZATION IN PHOSPHORUS-RICH COMPOSTING OF KITCHEN WASTE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 112-119. doi: 10.13205/j.hjgc.202210015

Citation:

CHANG Yuan, ZHAN Yabin, TAO Xingling, LIU Yongdi, ZHANG Kui, YU Bo, WEI Yuquan, LI Ji. EFFECT OF EXOGENOUS ADDITIVES ON PHOSPHORUS MOBILIZATION IN PHOSPHORUS-RICH COMPOSTING OF KITCHEN WASTE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 112-119. doi: 10.13205/j.hjgc.202210015

Citation:

CHANG Yuan, ZHAN Yabin, TAO Xingling, LIU Yongdi, ZHANG Kui, YU Bo, WEI Yuquan, LI Ji. EFFECT OF EXOGENOUS ADDITIVES ON PHOSPHORUS MOBILIZATION IN PHOSPHORUS-RICH COMPOSTING OF KITCHEN WASTE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 112-119. doi: 10.13205/j.hjgc.202210015

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EFFECT OF EXOGENOUS ADDITIVES ON PHOSPHORUS MOBILIZATION IN PHOSPHORUS-RICH COMPOSTING OF KITCHEN WASTE

doi: 10.13205/j.hjgc.202210015

CHANG Yuan^1,2,
ZHAN Yabin^1,2,
TAO Xingling²,
LIU Yongdi^1,2,
ZHANG Kui^1,2,
YU Bo³,
WEI Yuquan^{1,2
,
,},
LI Ji^1,2

1. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China;
2. Organic Recycling Research Institute (Suzhou) of China Agricultural University, Suzhou 215100, China;
3. Shandong Yinxiangweiye Group Co., Ltd, Heze 274328, China

Received Date: 2021-12-27

Abstract

Abstract

Aiming at the problems of low available phosphorus content of kitchen waste compost and the limited mobilization efficiency of adding low-grade rock phosphate, this study explored the effect of different exogenous additives on phosphorus transformation in phosphorus-rich kitchen waste composting, by adding successively surfactants (CSP), phosphate-solubilizing bacteria (CMSP) and biochar (CBMSP) based on adding rock phosphate (CP). The results showed that:1) compared to CP, the increment of available phosphorus after 35 days of aerobic composting increased by 2.00%, 9.00% and 39.00% in CSP, CMSP and CBMSP treatments, respectively. The addition of phosphate-solubilizing bacteria, biochar and surfactants significantly promoted the mobilization efficiency of insoluble phosphorus to 16.00% (P<0.05); 2) the number of bacteria in compost products treated by CMSP was significantly higher than that of CP(P<0.05), which increased to 1.85 times that of CP. The addition of biochar further improved the abundance of actinobacteria and fungi in kitchen waste compost products, up to 1.56 times and 10.66 times of CP respectively. These indicated that adding surfactants, biochar and phosphate-solubilizing bacteria together could improve the microbial growth environment in compost and promote microbial growth; 3) correlation analysis showed that microbial biomass phosphorus (MBP) was significantly correlated with available phosphorus and fungi abundance in CMSP and CBMSP (P<0.01). The synergistic addition of surfactants, phosphate-solubilizing bacteria inoculation and biochar could promote the mobilization of insoluble rock phosphate by enhancing the accumulation of microbial biomass phosphorus. This study could effectively improve the utilization efficiency of compost nutrient resources and insoluble phosphorus.
- kitchen waste,
- phosphorus-rich compost,
- phosphate-solubilizing bacteria,
- surfactants,
- biochar,
- insoluble phosphorus,
- mobilization

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References(27)

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