APPLICATION AND PROSPECTS OF PYROLYSIS CARBONIZATION TECHNOLOGY IN SLUDGE TREATMENT
As urbanization in China continues to advance,the volume of sewage sludge produced by wastewater treatment plants ranks among the highest globally.As an emerging treatment technology,sludge thermal pyrolysis carbonization offers characteristics of low pollution,low emissions,and high resource recovery potential,thus aiding in the achievement of energy efficiency,carbon reduction,and sustainable development goals for urban water supply and drainage systems.This paper summarizes the policy development trajectory and standardization efforts pertaining to thermal pyrolysis technology in China.It systematically reviews the key factors and response mechanisms influencing the process of sludge thermal pyrolysis carbonization and explores the migration and transformation patterns of pollutants during this process.It is elucidated that thermal pyrolysis carbonization can effectively passivate heavy metals and reduce emerging pollutants,such as antibiotic-resistant genes and microplastics.Appropriate pretreatment methods prior to thermal pyrolysis carbonization can mitigate the generation of precursor pollutants,such as NOx and SOx during sludge carbonization.Research on microwave-assisted pyrolysis and co-pyrolysis of sludge with other biomasses provides innovative approaches for sludge carbonization.Modified sludge subjected to thermal pyrolysis carbonization can serve as high-value resource products,including adsorbents,catalysts,and soil amendments.China has already established numerous exemplary engineering projects involving sludge thermal pyrolysis carbonization,which hold significant guidance for further advancement of sludge carbonization practices.However,the existing sludge thermal pyrolysis equipment still faces challenges such as low mass transfer efficiency,necessitating further innovation and development.Moreover,in terms of standardization,there is a need for further refinement of related operational and environmental assessment guidelines,pollutant control measures,product quality standards and pricing mechanisms.
万方数据
维普
