基于生命周期的污泥基活性炭制备工艺环境影响研究

施恩; 张帅; 张淼; 刘沙沙; 邹钰良; 张祥志

doi:10.13205/j.hjgc.202402005

基于生命周期的污泥基活性炭制备工艺环境影响研究

doi: 10.13205/j.hjgc.202402005

施恩^1, ,,
张帅¹,
张淼²,
刘沙沙¹,
邹钰良¹,
张祥志²

1. 沈阳建筑大学市政与环境工程学院, 沈阳 110168;
2. 沈阳建筑大学材料科学与工程学院, 沈阳 110168

基金项目:

辽宁省教育厅基本科研面上项目(JYTMS20231606)

详细信息

作者简介:
施恩(1985-),男,副教授,主要研究方向污水和污泥处理及资源化利用。shien@sjzu.edu.cn

通讯作者:
施恩(1985-),男,副教授,主要研究方向污水和污泥处理及资源化利用。shien@sjzu.edu.cn

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出版历程
- 收稿日期: 2023-10-14
- 网络出版日期: 2024-04-28

ENVIRONMENTAL IMPACT ASSESSMENT OF SLUDGE-BASED ACTIVATED CARBON PREPARATION PROCESS BASED ON LIFE CYCLE

1. School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang 110168, China;
2. School of Material Science and Engineering, Shenyang Jianzhu University, Shenyang 110168, China

摘要

摘要: 利用污泥制备活性炭是具有广泛应用前景的污泥资源化利用途径。但是目前对污泥基活性炭(SDAC)制备工艺进行评价的研究较少。以污水厂污泥制备活性炭为对象,建立了制备工艺流程图,运用生命周期评价(LCA),定量揭示制备工艺的环境影响及关键影响因素。结果表明,整个制备工艺中焙烧步骤对环境的影响占主导地位,其次是研磨或浸渍步骤,最后是洗涤和干燥步骤。水蒸气物理活化、CO₂物理活化、KOH浸渍法、ZnCl₂浸渍法、H₃PO₄浸渍法、ZnCl₂熔融盐法、物理化学法的能量消耗量分别为68.976,79.776,47.376,53.964,48.564,45.828,46.764 MJ/kg活性炭,而全球变暖潜力值分别为14.93,17.06,15.54,13.42,14.51,12.65,13.91 kg CO₂ eq/kg活性炭。LCA结果表明,利用CO₂物理活化方法制备活性炭对环境影响最大,而ZnCl₂熔融盐法对环境影响最小。对ZnCl₂熔融盐法敏感性分析结果表明,用电量和活化剂是进一步优化活性炭制备方法的两个关键因素。基于生命周期视角,ZnCl₂熔融盐法制备SDAC效果更优,同时应强化设备节能改造,可显著降低SDAC制备过程环境影响。
- 生命周期评价 /
- 活性炭 /
- 污水厂污泥 /
- 熔融盐法 /
- 浸渍法
Abstract: The preparation of activated carbon from sludge is a resourceful way to utilize sludge and with a wide range of applications. However, few studies have been conducted to evaluate the process of sludge-based activated carbon(SDAC) preparation. In this study, the activated carbon prepared from sewage plant sludge was used as an object, and a flow chart of the preparation process was established to quantitatively reveal the environmental impacts and key influencing factors of the preparation process by applying life cycle assessment(LCA). The results showed that the environmental impact of the roasting step dominated the whole preparation process, followed by the grinding or impregnation step, and then the washing and drying steps. The energy consumption of water vapor physical activation, CO₂ physical activation, KOH impregnation, ZnCl₂ impregnation, H₃PO₄ impregnation, ZnCl₂ molten salt method, and physicochemical method were 68.976, 79.776, 47.376, 53.964, 48.564, 45.828, and 46.764 MJ/kg of activated carbon, respectively, whereas the values of global warming potential were 14.93, 17.06, 15.54, 13.42, 14.51, 12.65 and 13.91 kg CO₂ eq/kg of activated carbon, respectively. The LCA results showed that the preparation of activated carbon using the CO₂ physical activation method had the highest environmental impact, while the ZnCl₂ molten salt method had the lowest environmental impact. The results of sensitivity analysis on the ZnCl₂ molten salt method showed that electricity consumption and activator are the two key factors for further optimization of the activated carbon preparation method. Based on the life cycle perspective, the ZnCl₂ molten salt method is more effective in preparing SDAC, and the energy-saving modification of the equipment should be strengthened, which can significantly reduce the environmental impact of the SDAC preparation process.
- life-cycle assessment /
- activated carbon /
- sewage sludge /
- molten salt method /
- impregnation method

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参考文献(37)

[1]	王志朴,朱赫男,邢文龙,等.污泥与秸秆共热解制备生物炭工艺优化及其对Cr(Ⅵ)的吸附[J].环境工程,2019,37(2):138-143.
[2]	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.
[3]	郭朝强,尚双,兰奎,等.不同含水率污泥和小麦秸秆混合热解制备富氢合成气[J].环境工程,2020,38(5):160-164 ,214.
[4]	MURAKAMI T,SUZUKI Y,NAGASAWA H,et al.Combustion characteristics of sewage sludge in an incineration plant for energy recovery[J].Fuel Processing Technology,2009,90(6):778-783.
[5]	LIEW C S,YUNUS N M,CHIDI B S,et al.A review on recent disposal of hazardous sewage sludge via anaerobic digestion and novel composting[J].Journal of Hazardous Materials,2022,423:126995.
[6]	戴亮,赵伟繁,张洪伟,等.污泥生物炭去除水中重金属的研究进展[J].环境工程,2020,38(12):70-77.
[7]	刘宇程,刘骞,陈菊,等.基于响应曲面法优化生物质污泥活性炭的制备方法[J].环境工程学报,2017,11(11):6041-6049.
[8]	范晓丹,康婷婷,尹乐,等.污泥活性炭对复合染料的脱色及其重金属浸出毒性[J].环境工程学报,2012,6(10):3623-3628.
[9]	KACAN E.Optimum BET surface areas for activated carbon produced from textile sewage sludges and its application as dye removal[J].Journal of Environmental Management,2016,166:116-123.
[10]	ZHANG M,GAO J,SHI E,et al.Mesoporous carbon derived from anaerobic granular sludge through molten salt method and its application for dye adsorption:an experimental and molecular dynamics simulation study[J].Biomass Conversion and Biorefinery,2022:1-10.
[11]	张俊杰,邵敬爱,黄河洵,等.利用污泥制备活性炭及其吸附特性的研究进展[J].化工进展,2017,36(10):3876-3886.
[12]	矫旭东,吴佳,王韬,等.基于全生命周期管理的固体废物分类资源化利用研究[J].环境工程,2021,39(10):201-206 ,170.
[13]	叶宁,卢皓,史晨,等.基于生命周期的白酒丢糟资源化新工艺技术环境影响研究[J/OL].环境工程,1-13[2023-12-08 ]http://kns.cnki.net/kcms/detail/11.2097.X.20230902.0028.002.html.
[14]	刘航驿,颜蓓蓓,林法伟,等.生命周期视角下2种餐厨垃圾资源化处理方案的对比分析[J].环境工程,2021,39(9):169-175.
[15]	NOWROUZI M,ABYAR H,YOUNESI H,et al.Life cycle environmental and economic assessment of highly efficient carbon-based CO₂ adsorbents:a comparative study[J].Journal of CO₂ Utilization,2021,47:101491.
[16]	HJAILA K,BACCAR R,SARRA M,et al.Environmental impact associated with activated carbon preparation from olive-waste cake via life cycle assessment[J].Journal of Environmental Management,2013,130:242-247.
[17]	MAITI P,SIDDIPI H,KUMARI U,et al.Adsorptive remediation of azo dye contaminated wastewater by ZnCl₂ modified bio-adsorbent:batch study and life cycle assessment[J].Powder Technology,2023,415:118153.
[18]	霍丽丽,赵立欣,孟海波,等.秸秆类生物质气炭联产全生命周期评价[J].农业工程学报,2016,32(增刊1):261-266.
[19]	窦鑫,曾淦宁,艾宁,等.铜藻基活性炭全生命周期温室气体排放分析[J].环境科学与技术,2015,38(12):262-266.
[20]	LI W H,YUE Q Y,GAO B Y,et al.Preparation of sludge-based activated carbon made from paper mill sewage sludge by steam activation for dye wastewater treatment[J].Desalination,2011,278(1/2/3):179-185.
[21]	RIO S,FAUR-BRASQUET C,LE Coq L,et al.Production and characterization of adsorbent materials from an industrial waste[J].Adsorption,2005,11:793-798.
[22]	LI Z,DENG H,YANG L,et al.Influence of potassium hydroxide activation on characteristics and environmental risk of heavy metals in chars derived from municipal sewage sludge[J].Bioresource Technology,2018,256:216-223.
[23]	LI L Y,GONG X D,ABIDA O.Waste-to-resources:exploratory surface modification of sludge-based activated carbon by nitric acid for heavy metal adsorption[J].Waste Management,2019,87:375-386.
[24]	ZHANG F S,NRIAGU J O,ITOH H.Mercury removal from water using activated carbons derived from organic sewage sludge[J].Water Research,2005,39(2/3):389-395.
[25]	尹炳奎,朱石清,朱南文,等.生物质活性炭的制备及其染料废水中的应用[J].环境污染与防治,2006(8):608-611.
[26]	ALTHAUS H J,CHUDACOFF M,HISCHIER R,et al.Life cycle inventories of chemicals[J].Ecoinvent Report,2007,2.
[27]	DONES R,BAUER C,BOLLIGER R,et al.Life cycle inventories of energy systems:results for current systems in Switzerland and other UCTE countries[J].Final Report Ecoinvent,2007,2:5.
[28]	WANG S,PERSSON H,YANG W,et al.Pyrolysis study of hydrothermal carbonization-treated digested sewage sludge using a Py-GC/MS and a bench-scale pyrolyzer[J].Fuel,2020,262:116335.
[29]	蔡旭,黄群星,王飞,等.污泥在CO₂气氛下热解CO与CH₄的生成特性[J].环境工程学报,2016,10(7):3779-3786.
[30]	GABARRELL X,FONT M,VICENT T,et al.A comparative life cycle assessment of two treatment technologies for the Grey Lanaset G textile dye:biodegradation by Trametes versicolor and granular activated carbon adsorption[J].The International Journal of Life Cycle Assessment,2012,17:613-624.
[31]	HUANG C,MOHAMED B A,LI L Y.Comparative life-cycle assessment of pyrolysis processes for producing bio-oil,biochar,and activated carbon from sewage sludge[J].Resources,Conservation and Recycling,2022,181:106273.
[32]	冯博博.氢氧化钾生产中的三废综合治理[J].氯碱工业,2011,47(6):32-33.
[33]	卢芳仪,卢爰军.无污染的氯化锌生产工艺[J].化学世界,2006(2):125-126.
[34]	李伟,赵连文,多春玲.盐酸生产中尾气吸收工艺改进[J].氯碱工业,2022,58(7):24-25.
[35]	潘宇婷,李霞,李金枝,等.工业用氢氧化钠中氯酸钠含量测定方法的探讨[J].中国氯碱,2017(3):30-33.
[36]	唐松标,周卫红,杨改秀.不同温度场下生物质热解特性及物质流和能量流分析[J].太阳能学报,2023,44(7):511-519.
[37]	BAYER P,HEUER E,KARL U,et al.Economical and ecological comparison of granular activated carbon (GAC) adsorber refill strategies[J].Water Research,2005,39(9):1719-1728.