A PRACTICAL PROJECT ON TREATMENT OF FOOD WASTEWATER ANAEROBIC DIGESTATE USING A FULL-SCALE HIGHLY EFFICIENT SINGLE-STAGE NITROGEN REMOVAL PROCESS

LIAN Jinshi; WANG Ru; DENG Liangwei; WANG Lan

doi:10.13205/j.hjgc.202410003

Volume 42 Issue 10

Oct. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(10): 17-25

ZHA Wengui, WANG Xueye, WANG Zhiwei. PILOT-SCALE STUDY ON MEMBRANE-CATHODE ELECTRO-FENTON PROCESS FOR PRETREATMENT OF SEMICONDUCTOR WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(4): 153-158,208. doi: 10.13205/j.hjgc.202204022

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LIAN Jinshi, WANG Ru, DENG Liangwei, WANG Lan. A PRACTICAL PROJECT ON TREATMENT OF FOOD WASTEWATER ANAEROBIC DIGESTATE USING A FULL-SCALE HIGHLY EFFICIENT SINGLE-STAGE NITROGEN REMOVAL PROCESS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(10): 17-25. doi: 10.13205/j.hjgc.202410003

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A PRACTICAL PROJECT ON TREATMENT OF FOOD WASTEWATER ANAEROBIC DIGESTATE USING A FULL-SCALE HIGHLY EFFICIENT SINGLE-STAGE NITROGEN REMOVAL PROCESS

doi: 10.13205/j.hjgc.202410003

LIAN Jinshi^1,2,3,
WANG Ru^1
,,
DENG Liangwei^2,3,
WANG Lan^{2,3
,}

1. School of Environment and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China;
3. Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China

Received Date: 2023-05-03
Available Online: 2024-11-30

Abstract

Abstract

In this study, a novel type of highly efficient single-stage nitrogen removal process (Hesin) was developed based on the principle of partial nitrification-denitrification. The total volume of the Hesin reactor was 300 m³. After 185 days of start-up and operation, the Hesin process was successfully achieved for the efficient treatment of food wastewater anaerobic digestate. During the stable operation period, the hydraulic retention time (HRT) was 100 h, the wastewater volume was 60 m³/d, and the dissolved oxygen (DO) was limited to about 0.5 mg/L. The results showed that the average total nitrogen removal rate could reach 0.31 kg/(m³·d), the average total nitrogen removal efficiency could reach 95.55%, the concentration of total nitrogen in the effluent was less than 100 mg/L, and the average COD removal efficiency was 87.26%, 3 times that of the traditional process in the treatment of kitchen wastewater. The sludge concentration could reach 8.85 g/L after acclimation by the Hesin process, and the sludge particle size increased obviously. Through the analysis of microbial community structure by high-throughput sequencing, it was found that obvious community succession occurred during the domestication process, and the nitrite-oxidizing bacteria Nitrospirales were successfully inhibited and washed out. The results were consistent with the accumulation of nitrite during the operation of the Hesin process, indicating that the partial nitrification-denitrification process was successfully realized. This study can provide new solutions and technical support for the removal of total nitrogen in food wastewater anaerobic digestate.
- food wastewater anaerobic digestate,
- partial nitrification-denitrification,
- single-stage nitrogen removal,
- community structure,
- practical project

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References(41)

References

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