Carbon emissions of municipal sludge "deep dehydration-drying-incineration" processes under different sludge preconditioning methods
MA Jian-yun1, LI Zhi1, GU Jun1, WANG Fei2, HOU Bao-lian3, YU Ran1
1. School of Energy and Environment, Southeast University, Nanjing 210096, China; 2. Nanjing Water Group Co. LTD, Nanjing 210000, China; 3. Jiangsu Jinling Environment Co. LTD, Nanjing 210000, China
Abstract：This study developed pilot-scale "deep dehydration-drying-incineration" processes for sludge treatment and disposal with two different preconditioning approaches, i.e., novel sludge biolysis and the conventional chemical agent (iron salt + lime). Then, the carbon emission characteristics of these approaches were analysed and compared according to methods by Intergovernmental Panel on Climate Change (IPCC). The results showed that the moisture contents of dewatered sludge with the plate and frame filter press were both less than 60% no matter which preconditioning method was applied. However, the dry matter contents and the dry basis calorific values of the filter pressed sludges were significantly different. Specifically, the biolysed sludge showed 23.0 % lower dry matter content and 32.1% higher dry basis calorific value as compared with that treated with chemical preconditioning. Based on one cubic meter of raw sludge (RS) with 98% water content, and the total carbon emissions of the sludge "deep dehydration-drying-incineration" process for sludge treatment and disposal with biolysis as pretreatment was 15.8kg CO2eq/m3 RS, which was 41.7% lower than that with the chemical preconditioning process (27.1kg CO2eq/m3 RS).
中华人民共和国住房和城乡建设部.中国城市建设统计年鉴[Z]. 2020. Ministry of Housing and Urban-Rural Development of the People's Republic of China. China urban construction statistical yearbook[Z]. 2020.
[2]
李乔洋.基于碳减排分析的我国城镇污泥处置现状及发展趋势研究[D]. 哈尔滨:哈尔滨工业大学, 2020. Li Q Y, Current situation and development trend of urban sludge disposal in China based on carbon emission reduction analysis[D]. Harbin: Harbin Institute Of Technology, 2020.
[3]
郝晓地,陈奇,李季,等.污泥干化焚烧乃污泥处理/处置终极方式[J]. 中国给水排水, 2019,35(4):35-42. Hao X D, Chen Q, Li J, et al. Ultimate approach to handle excess sludge: Incineration and drying[J]. China Water & Wastewater. 2019, 35(4):35-42.
[4]
Cao B D, Zhang T, Zhang W J, et al. Enhanced technology based for sewage sludge deep dewatering: A critical review[J]. Water Research. 2021,189:116650.
[5]
Wu B, Dai X, Chai X. Critical review on dewatering of sewage sludge: Influential mechanism, conditioning technologies and implications to sludge re-utilizations[J]. Water Research, 2020,180:115912.
[6]
陈丹丹,窦昱昊,卢平,等.污泥深度脱水技术研究进展[J]. 化工进展, 2019,38(10):4722-4746. Chen D D, Dou Y H, Lu P, et al. A review on sludge deep dewatering technology. Chemical Industry and Engineering Progress[J]. 2019,38(10):4722-4746.
[7]
冯凯,黄鸥.石灰调质与石灰干化工艺在污泥脱水中的应用[J]. 给水排水, 2011,47(5):7-10. Feng K, Huang. O. Application of lime conditioning and lime drying process in sludge dewatering[J]. Water & Wastewater Engineering[J]. 2011,47(5):7-10.
[8]
梅至雅.化学和生物调理对市政污泥脱水性能的影响研究[D]. 杭州:浙江大学, 2020. Mei Z Y. Effects of chemical and biological conditioning on the dewatering performance of municipal sludge[D]. Hangzhou: Zhejiang University, 2020.
[9]
Yu R, Zhang S, Chen Z, et al. Isolation and application of predatory Bdellovibrio-and-like organisms for municipal waste sludge biolysis and dewaterability enhancement[J]. Frontiers of Environmental Science & Engineering, 2017,11(1):10.
[10]
Guo Y B, Pan Q, Yan S Q, et al. Bdellovibrio and like organisms promoted growth and survival of juvenile abalone Haliotis discus hannai Ino and modulated bacterial community structures in its gut[J]. Aquaculture International. 2017,25(4):1625-1643.
[11]
Bratanis E, Andersson T, Lood R, et al. Biotechnological potential of bdellovibrio and like organisms and their secreted enzymes[J]. Frontiers in Microbiology, 2020,11:662.
[12]
陈小红,林阿乞,蔡俊鹏.蛭弧菌对九孔鲍非特异性免疫力和抗病力的影响[J]. 现代食品科技, 2011,27(5):502-505. Chen X H, Lin A Q, Cai J P. Effects of bdellovibrio- and-like organism on non-specific immunity and disease resistance of haliotis diversicolor aquatilis[J]. Modern Food Science and Technology, 2011,27(5):502-505.
[13]
Pilli S, Yan S, Tyagi R D, et al. Anaerobic digestion of ultrasonicated sludge at different solids concentrations-Computation of mass-energy balance and greenhouse gas emissions[J]. Journal of Environmental Management, 2016,166:374-386.
[14]
Wei L, Zhu F, Li Q, et al. Development, current state and future trends of sludge management in China: Based on exploratory data and CO2- equivaient emissions analysis[J]. Environment International, 2020, 144(3):106093.
[15]
李哲坤,张立秋,杜子文,等.城市污泥不同处理处置工艺路线碳排放比较[J]. 环境科学, 2023,44(2):10. Li Z K, Zhang L Q, Du Z W, et al. Comparison of carbon emissions in different treatment and disposal process routes of municipal sludge[J]. Environmental Science, 2023,44(2):10.
[16]
林文聪,赵刚,刘伟,等.污水厂污泥典型处理处置工艺碳排放核算研究[J]. 环境工程, 2017,35(7):175-179. Lin W C, Zhao G, Liu W, et al. Study on carbon emission accounting of typical processes of sewage sludge treatment and disposal[J]. Environmental Engineering, 2017,35(7):175-179.
[17]
次瀚林,王先恺,董滨.不同污泥干化焚烧技术路线全链条碳足迹分析[J]. 净水技术, 2021,40(6):77-82. Ci H L, Wang X K, Dong B. Carbon footprint analysis of different sludge drying and incineration processes[J]. 2021,40(6):77-82.
[18]
高旭,马蜀,郭劲松,等.城市污水厂污水污泥的热值测定分析方法研究[J]. 环境工程学报, 2009,3(11):1938-1942. Gao X, Ma S, Guo J S, et al. Determination of the calorific value of wastewater and sludge from a municipal wastewater treatment plant[J]. Chinese Journal of Environmental Engineering, 2009,3(11):1938-1942.
[19]
中华人民共和国发展和改革委员会.省级温室气体清单编制指南(试行)[Z]. 2011. National Development and Reform Commission. Guidelines for the preparation of provincial GHG inventories(on Trial)[Z]. 2011.
[20]
Ipcc. 2006IPCC Guidelines for national greenhouse gas inventories[M]. JAPAN: IGES, 2006.
[21]
Hao X, Chen Q, van Loosdrecht M C M, et al. Sustainable disposal of excess sludge: Incineration without anaerobic digestion[J]. Water Research. 2020,170:115298.
[22]
张岳,葛铜岗,孙永利,等.基于城镇污水处理全流程环节的碳排放模型研究[J]. 中国给水排水, 2021,37(9):65-74. Zhang Yue, Ge T G, Sun Y L, et al. Research on carbon emission model based on the whole process of urban sewage treatment[J]. China Water & Wastewater, 2021,37(9):65-74.
[23]
中华人民共和国生态环境部.企业温室气体排放核算方法与报告指南发电设施(2022年修订版)[Z]. 2022. Ministry of Ecology and Environment of the People's Republic of China. Corporate greenhouse gas emissions accounting and reporting guide, power generation facilities (2022revision)[Z]. 2022.
[24]
中国标准化研究院,方圆标志认证集团有限公司,广州能源检测研究院,等.综合能耗计算通则[Z]. 2021. China National Institute of Standardization, China Quality Mark Certification Group, Guangzhou Institute of Energy Testing, et al. General rules for calculation of the comprehensive energy consumption[Z]. 2021.
[25]
中华人民共和国环境保护部.城镇污水处理厂污泥处理处置污染防治最佳可行技术指南(试行)[Z]. 2010. Ministry of Ecology and Environment of the People's Republic of China. Guideline on best available technologies of pollution prevention and control for treatment and disposal of sludge from municipal wastewater treatment plant(on Trial)[Z]. 2010.
[26]
中华人民共和国住房和城乡建设部.城镇污水处理厂污泥处理处置技术指南[Z]. 2011. Ministry of Housing and Urban-Rural Development of the People's Republic of China. Technical guide for sludge treatment and disposal of urban sewage treatment plants[Z]. 2011.
[27]
Yan C, Zhan M, Xv K, et al. Sludge dewaterability enhancement under low temperature condition with cold-tolerant Bdellovibrio sp. CLL13[J]. Science of the Total Environment. 2022,820:153269.
