QUYang,ZUO Wu,XULi-li,et al.Design of Cooperative Total Anaerobic Digestion Engineering for Classified Wet Waste Treatment[J].China Water & Wastewater,2024,40(2):75-81.
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Design of Cooperative Total Anaerobic Digestion Engineering for Classified Wet Waste Treatment

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第2期 Page: 75-81 Column: Date of publication: 2024-01-17
Author(s):
QU　Yang1;  ZUO Wu1;  XU　Li-li2;  SHAN　Jun3;  HANG　Jian-qiang3;  YAN　Hao-lun4
（1. Jiangsu Environmental Engineering Technology Co. Ltd.， Nanjing 210019， China； 2. Shanghai Environment Sanitation Engineering Design Institute， Shanghai 200232， China； 3. Welle Environmental Group Co. Ltd.， Changzhou 213125， China； 4. Shanghai Huanyun Renewable Energy Co. Ltd.， Shanghai 201603， China）
Keywords:
wet waste;  collaborative treatment;  anaerobic digestion;  sewage treatment;  carbon source
Abstract:
The terminal treatment of wet waste is facing great challenges after the implementation of Shanghai Municipal Solid Waste Management Regulations. The wet waste recycling project in Shanghai has a treatment capacity of 500 t/d for wet waste (including 150 t/d food waste and 350 t/d kitchen waste) and 30 t/d for waste edible oil. The combined process consists of collaborative pretreatment, combined wet anaerobic digestion, comprehensive utilization of biogas and collaborative sewage treatment. The products generate from the pretreated food waste and kitchen waste are hydrolyzed and acidified synergistically to form a medium-low temperature liquid, and the kitchen waste leachate, food waste sewage and waste oil are extracted synergistically to form a high temperature liquid. The two kinds of liquids are digested synergistically to produce biogas and generate electricity, and the extracted oil is sold. The treatment capacity of the sewage treatment system is 1 200 m3/d, using a two-stage AO, external ultrafiltration, nanofiltration and reverse osmosis combined process. Through the reasonable allocation of food waste sewage, wet waste centrifugal biogas slurry, incineration plant leachate and leachate anaerobic biogas slurry, the influent C/N ratio is no less than 9.9 ∶1, and there is no need to supplement additional carbon source. The total investment of the project is about 873 million yuan, and the unit investment is approximately 1.647 million yuan/t. The wet waste pretreatment and wastewater treatment are highly cooperative, and the effluent quality stably meets the limit specified in the discharge standard.
Last Update: 2024-01-17