摘要
污泥的无害化处置和资源化利用是目前社会关注的重点,对污泥泥质的综合性评估是污泥处置和利用的前提。采用8个地区的出厂污泥,基于元素分析结果,综合考虑其碳排放量和风险性,对污泥“焚烧+灰渣利用”处置方式进行综合性评估。污泥的工业分析发现地区1、7、8污泥中的干基低位发热量均值分别为11.60、10.39和12.04 MJ/kg,有机物含量均值为53.98%、51.23%和54.97%,发热量和有机成分含量较高,发热量和有机成分存在显著正相关关系(P<0.05)。而地区1、2、6污泥的重金属含量较高,8个地区的污泥浸出液中镍、铜、锌所占比例较大,3种元素之和约为总体的90%。从碳排放和风险性分析可得,地区1、7、8的碳补偿量分别为958.59、909.08和963.39 kgCO 2/t,碳补偿量较大,总碳排放量较小,但地区1污泥在采用制砖、水泥熟料处置时综合污染指数分别为0.72和0.71,在污染警戒范围(0.7~1.0)内。结果表明,地区1、7、8的出厂污泥宜采用“焚烧+灰渣利用”处置方式,但地区1污泥处置时需关注重金属污染风险。污泥的元素分析能为污泥的焚烧处置提供科学性指导。
The harmless disposal and resource utilization of sludge are currently concerned by social attention,and comprehensive evaluation of sludge quality is a prerequisite for sludge disposal and utilization.Based on the results of elemental analysis of sludge from 8 regions,the‘incineration+ash utilization’disposal method of sludge was evaluated comprehensively considering its carbon emission and risk.The industrial element analysis of sludge found that the calorific value in sludge from regions 1,7 and 8 were 11.60,10.39 and 12.04 MJ/kg,respectively,and organic contents were 53.98%,51.23%and 54.97%respectively,which were significantly higher than other regions,and there was a significant positive correlation between calorific value and organic components(P<0.05).In addition,the heavy metal contents of sludge in regions 1,2 and 6 were higher,and the proportion of Ni,Cu and Zn in the sludge leaching solution of 8 regions was about 90%.From the analysis of carbon emissions and risks,the carbon compensation of regions 1,7 and 8 were 958.59,909.08 and 963.39 kgCO 2/t,respectively,which had larger carbon compensation amounts and smaller carbon emissions.However,for sludge brick making and cement clinker disposal in region 1,the comprehensive pollution indexes were 0.72 and 0.71,which was within the pollution warning range(0.7-1.0).Based on comprehensive evaluation,it can be concluded that the‘incineration+ash utilization’disposal should be adopted for the sludge in regions 1,7 and 8.However,attention should be paid to the risk of heavy metal pollution when disposing of sludge in region 1.The elemental analysis of sludge can provide scientific guidance for the incineration disposal of sludge.
作者
范雪滢
卢嘉慧
林健辉
杨旭楠
梁嘉慧
曾国驱
FAN Xueying;LU Jiahui;LIN Jianhui;YANG Xu′nan;LIANG Jiahui;ZENG Guoqu(Institute of Microbiology,Guangdong Academy of Sciences,Guangzhou,Guangdong 510070,China;Guangdong Detection Center of Microbiology,Guangzhou,Guangdong 510070,China;State Key Laboratory of Applied Microbiology Southern China,Guangzhou,Guangdong 510070,China;Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application,Guangzhou,Guangdong 510070,China)
出处
《中国无机分析化学》
CAS
北大核心
2024年第4期418-428,共11页
Chinese Journal of Inorganic Analytical Chemistry
基金
国家重点研发计划项目(2022YFF1301203)
广东省科学院打造综合产业技术创新中心行动资金资助项目(2022GDASZH-2022010105)。
关键词
元素分析
污泥处置
焚烧
碳排放
风险性分析
elemental analysis
sludge disposal
incineration
carbon emissions
risk analysis
