INVESTIGATION ON CHARACTERIZATION AND CROP EFFECT OF MICROBIAL NUTRIENT STIMULANTS

HAO Jiahou; TAN Jiayi; ZHANG Yue; SONG Lian; WANG Shuo; CHEN Sisi; LI Ji

doi:10.13205/j.hjgc.202309010

Volume 41 Issue 9

Sep. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(9): 80-88

HAO Jiahou, TAN Jiayi, ZHANG Yue, SONG Lian, WANG Shuo, CHEN Sisi, LI Ji. INVESTIGATION ON CHARACTERIZATION AND CROP EFFECT OF MICROBIAL NUTRIENT STIMULANTS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(9): 80-88. doi: 10.13205/j.hjgc.202309010

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HAO Jiahou, TAN Jiayi, ZHANG Yue, SONG Lian, WANG Shuo, CHEN Sisi, LI Ji. INVESTIGATION ON CHARACTERIZATION AND CROP EFFECT OF MICROBIAL NUTRIENT STIMULANTS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(9): 80-88. doi: 10.13205/j.hjgc.202309010

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INVESTIGATION ON CHARACTERIZATION AND CROP EFFECT OF MICROBIAL NUTRIENT STIMULANTS

doi: 10.13205/j.hjgc.202309010

HAO Jiahou¹,
TAN Jiayi¹,
ZHANG Yue²,
SONG Lian³,
WANG Shuo^1,4,
CHEN Sisi¹,
LI Ji^{1,4
,
,}

1. Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;
2. Water Industry Association, China Civil Engineering Society, Beijing 100082, China;
3. Wuxi Guolian Environmental Protection Technology Co., Ltd., Wuxi 214000, China;
4. Jiangsu College Water Treatment Technology and Material Collaborative Innovation Center, Suzhou 215009, China

Received Date: 2023-08-08
Available Online: 2023-11-15

Abstract

Abstract

Microbial nutrient stimulant, produced after alkaline thermal hydrolysis of activated sludge, are rich in nitrogenous nutrients and stimulant substances that promote plant growth, and have received rising attention in the field of sludge resource utilization and sustainable agricultural development. This study focused on analyzing the basic nutrient characteristics, stimulant composition characteristics, and pollutant content characteristics of microbial nutrient stimulants, and analyzing their potential in land application. Microbial nutrient stimulant was rich in nutrients such as nitrogen, phosphorus, potassium, organic carbon, and minerals that promoted plant growth, with nitrogen and calcium as the main elements. At the same time, the microbial nutrient stimulants also contained stimulant components such as humic acid, fulvic acid, tryptophan, as well as phytohormone substances (indole-3-acetic acid) and chemosensory substances (indole derivatives), a total of 9445 kinds of organic molecules were detected. The heavy metal content of microbial nutrient stimulants was reduced by 47.39% to 100% compared to sludge, and the ecological risk of PAHs and antibiotics was much lower than that of sludge. A summary of the land application effect showed that microbial nutrient stimulants could promote the yield of pakchoi cabbage, reduce the accumulation of heavy metals in pakchoi cabbage, and reduce fertilization costs, by partially replacing chemical fertilizers. By analyzing the dual properties of nutrient and stimulant components of microbial nutrient stimulant, it was suggested that microbial nutrient stimulant had good potential for application in enhancing photosynthesis, antioxidant properties, nutritional quality, and reducing heavy metal accumulation in pakchoi cabbage.
- microbial nutrient stimulants,
- sludge resource utilization,
- land use,
- fertilizer substitution,
- crop quality improvement

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References(44)

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