WANGYue,ZHANGYun-xia,CHANGBao-jun,et al.Design of Anaerobic Digestion Process for Kitchen Waste Utilizing a “Dry-Wet Coordination” Approach[J].China Water & Wastewater,2024,40(24):64-68.
基于“干湿协同”的厨余垃圾厌氧消化工艺设计
- Title:
- Design of Anaerobic Digestion Process for Kitchen Waste Utilizing a “Dry-Wet Coordination” Approach
- Keywords:
- kitchen waste; anaerobic digestion; synergistic effect; multivariate mixing; moderate temperature
- 摘要:
- 以安徽地区某大型厨余垃圾处理项目为例，介绍了餐厨垃圾与厨余垃圾协同厌氧消化工艺的应用情况。该工艺设计将餐厨垃圾的分选固渣与厨余垃圾滤液在湿式厌氧消化及干式厌氧消化中交叉协同处理，利用物料多元性所带来的强化效应提升总体厌氧消化效能与稳定性，其中湿式厌氧采用CSTR工艺，干式厌氧采用卧式多轴搅拌工艺。协同后湿式厌氧消化的平均单位产气率为85 m3/t，干式厌氧消化的平均单位产气率为140 m3/t，沼气中甲烷含量平均为60.50%，平均单位产气率均处于行业内较高水平。
- Abstract:
- Using the large-scale kitchen waste treatment project in Anhui Province as a case study, this paper introduces the application of a collaborative anaerobic digestion process for kitchen waste management. The process design adopts a cross-coordinated manner to treat the separation of solid residues from kitchen waste and kitchen filtrate within both wet and dry anaerobic digestion systems. This approach leverages the enhanced effects of material diversity to improve overall efficiency and stability of anaerobic digestion. The wet anaerobic digestion uses the continuous stirred tank reactor (CSTR) process, while the dry anaerobic digestion uses a horizontal multi-axis stirring process. Following collaborative efforts, the average unit gas production rate of wet anaerobic digestion is 85 m3/t, while the average unit gas production rate of dry anaerobic digestion is 140 m3/t. The average methane content in biogas is measured at 60.50%, and the average unit gas production rate remains high within industry standards.
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