ANYe,ZHOUYan-ling,PANXiao-yue,et al.Exploration on Optimizing the Technical Route of Low-carbon Sludge Treatment and Disposal under the Background of “Carbon Peak and Carbon Neutralization”[J].China Water & Wastewater,2024,40(20):23-32.
Exploration on Optimizing the Technical Route of Low-carbon Sludge Treatment and Disposal under the Background of “Carbon Peak and Carbon Neutralization”
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第20期
Page:
23-32
Column:
Date of publication:
2024-10-17
- Keywords:
- pretreatment technology; thermal hydrolysis; deep dehydration; pre-sludge modified separation; carbon emission reduction
- Abstract:
- In order to explore the low-carbon development path of sludge disposal, the article compared carbon emissions of the anaerobic digestion (route 1), aerobic fermentation (route 2), and dry incineration (route 3), the mainstream sludge treatment and disposal technology routes with their optimization and improvement schemes. The results show that the main carbon emission types of route 1A/1B (anaerobic digestion + dehydration + land use, thermal hydrolsis + anaerobic digestion+dehydration+land use) are heating heat consumption, route 2A/2B (dehydration + aerobic fermentation + land use, deep dehydration + aerobic fermentation + land use) are CH4 fugitive, pharmaceutical dosing, route 3A/3B(dehydration + semi-drying + incineration + building materials utilization, pre-sludge modified separation +dehydration + semi?drying+incineration + building materials utilization) are agent/excipient consumption. And targeted optimization countermeasures can reduce the carbon emissions of the corresponding units. In addition, by setting a thermal hydrolysis solution unit before anaerobic digestion and the pre?sludge modified separation unit before drying and incineration, the advantages of carbon emission reduction are obvious, reaching about 58% and 63% respectively. The carbon emission of the aerobic fermentation pre-deep dehydration unit is greatly influenced by the dehydration agent, and the carbon reduction advantage is not obvious.
Last Update:
2024-10-17