污泥低温水热处理过程中影响因素的研究
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摘要
对市政污泥进行低温水热处理,针对不同反应温度130、160、190、220、250℃和不同反应停留时间15 min、30 min、1 h、1.5 h、2 h水热处理后污泥的脱水性能进行探究,通过测定污泥比阻、泥饼含水率和污泥体积指数来表征污泥的脱水性能,并确定了水热反应的最佳工艺参数。结果表明,反应停留时间与反应温度相比较,反应温度对水热污泥的脱水性能有着更大的影响,随着反应温度的上升,污泥脱水性能呈现先变差后逐渐变好的趋势。
The research was conducted by analyzing the sludge produced at 130℃, 160℃, 190℃, 220℃ and 250℃ for 15min, 30min, 1h, 1.5h and 2h by hydrothermal to investigate the effects of hydrothermal reaction temperature and duration on dewatering performance. The specific resistance to filtration(SRF), the sludge volume index and the moisture content of sludge cake were measured to examine the dewatering performance of sludge, and the optimum technological parameters was determined by the result. The research showed that the reaction temperatures had a larger effect on the dewatering performance of sludge than the duration. The dewatering performance was becoming worse first and then becoming better with the increase of the reaction temperature.
The research was conducted by analyzing the sludge produced at 130℃, 160℃, 190℃, 220℃ and 250℃ for 15min, 30min, 1h, 1.5h and 2h by hydrothermal to investigate the effects of hydrothermal reaction temperature and duration on dewatering performance. The specific resistance to filtration(SRF), the sludge volume index and the moisture content of sludge cake were measured to examine the dewatering performance of sludge, and the optimum technological parameters was determined by the result. The research showed that the reaction temperatures had a larger effect on the dewatering performance of sludge than the duration. The dewatering performance was becoming worse first and then becoming better with the increase of the reaction temperature.
引文
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[11]CHEN Zhan,ZHANG Weijun,WANG Dongsheng,et al.Enhancement of activated sludge dewatering performance by combined composite enzymatic lysis andchemical re-flocculation with inorganic coagulants:Kinetics of enzymaticreaction and re-flocculation morphology[J].Water Research,2015,83:367-376.
[2]EYSER C V,PALMU K,SCHMIDT T C,et al.Pharmaceutical load in sewage sludge and biochar produced byhydrothermal carbonization[J].Science of the Total Environment,2015,537(15):180-186.
[3]薛香玉,陈德珍,戴晓虎,等.基于重金属安全性的污泥水热处理温度选择[J].同济大学学报(自然科学版),2014,42(12):1880-1885.
[4]高毛.制革污泥低温热解碳化方法研究[J].中国皮革,2014,43(23):36-44.
[5]王定美.水热炭化终温对污泥生物炭产量及特性的影响[J].生态环境学报,2012,21(10):1775-1780.
[6]DANSO-BOATENG E,HOLDICH R G,SHAMA G,et al.Kinetics of faecal biomass hydrothermal carbonisation for hydrocharproduction[J].Applied Energy,2013,111(1):351-357.
[7]李海英,铃木荣二.城市污水污泥热解实验及产物特性[J].天津大学学报,2006,39(6):739-744.
[8]邵立明,何品晶,李国建.污水厂污泥低温热解过程能量平衡分析[J].上海环境科学,1996,15(6):19-21.
[9]沈巧炼.城市污泥低温热解技术影响因素的分析[J].能源与环境,2012(6):57-60.
[10]YOU Guoxiang,WANG Peifang,HOU Jun,et al.Insights into the short-term effects of Ce O2 nanoparticles on sludge dewatering and related mechanism[J].Water Research,2017,118:93-103.
[11]CHEN Zhan,ZHANG Weijun,WANG Dongsheng,et al.Enhancement of activated sludge dewatering performance by combined composite enzymatic lysis andchemical re-flocculation with inorganic coagulants:Kinetics of enzymaticreaction and re-flocculation morphology[J].Water Research,2015,83:367-376.