脱硫废水处理系统污泥资源化除磷技术研究
|
摘要
针对脱硫废水水质和"三联箱"处理工艺的特点,提出了将脱硫废水处理系统污泥(脱硫污泥)用于除磷的方案。以模拟含磷废水为处理对象,对脱硫污泥除磷技术进行了深入研究,考察了不同污泥浓度及污泥含钙量对除磷效果的影响,通过吸附热力学和吸附动力学的研究探索除磷机理。结果表明,含钙污泥除磷主要通过化学反应和吸附作用共同实现,化学反应产物为CaHPO_4·2H_2O;在一定污泥浓度和含钙量条件下,磷去除率可达99%以上;污泥含钙量越高,对磷的吸附容量越大,所需污泥量越少;适当升高温度可以促进污泥对磷的吸附。由X射线衍射(XRD)和扫描电子显微镜(SEM)表征分析可知,反应后的污泥表面有透钙磷石生成,进一步验证了实验结果。
This paper proposes a scheme for the utilization of sludge from the FGD wastewater treatment system(desulfurization sludge)according to the characteristics of flue gas desulphurization(FGD)wastewater and the"triple box"process,The phosphorus removal technology on desulphurization sludge is studied using the simulated wastewater as the processing object.Effects of the sludge dosage and its calcium content on phosphorus removal efficiency are discussed,and the mechanism is explored with the study on adsorption thermodynamics and kinetics.The results show that phosphorus removal using calcium-containing sludge is mainly realized through chemical reaction and adsorption,and the product is CaHPO_4·2H_2O.The phosphorus removal rate is over99%under a certain sludge concentration and calcium content.The higher the calcium content in the sludge,the greater the adsorption capacity for phosphorus and the less the sludge demand will be.In addition,the appropriate raising temperature can promote the adsorption of phosphorus to the sludge.The characterization analysis of X ray diffraction(XRD)and the scanning electron microscope(SEM)show that calcium phosphate rocks generate on the surface of the sludge,which further verifies the experimental results.
This paper proposes a scheme for the utilization of sludge from the FGD wastewater treatment system(desulfurization sludge)according to the characteristics of flue gas desulphurization(FGD)wastewater and the"triple box"process,The phosphorus removal technology on desulphurization sludge is studied using the simulated wastewater as the processing object.Effects of the sludge dosage and its calcium content on phosphorus removal efficiency are discussed,and the mechanism is explored with the study on adsorption thermodynamics and kinetics.The results show that phosphorus removal using calcium-containing sludge is mainly realized through chemical reaction and adsorption,and the product is CaHPO_4·2H_2O.The phosphorus removal rate is over99%under a certain sludge concentration and calcium content.The higher the calcium content in the sludge,the greater the adsorption capacity for phosphorus and the less the sludge demand will be.In addition,the appropriate raising temperature can promote the adsorption of phosphorus to the sludge.The characterization analysis of X ray diffraction(XRD)and the scanning electron microscope(SEM)show that calcium phosphate rocks generate on the surface of the sludge,which further verifies the experimental results.
引文
[1]马双忱,于伟静,贾绍广,等.燃煤电厂脱硫废水处理技术研究与应用进展[J].化工进展,2016,35(1):255-262.MA Shuangchen,YU Weijing,JIA Shaoguang,et al.Research and application progresses of flue gas desulfurization(FGD)wastewater treatment technologies in coal-fired plants[J].Chemical Industry and Engineering Progress,2016,35(1):255-262.
[2]刘海洋,夏怀祥,江澄宇,等.燃煤电厂湿法脱硫废水处理技术研究进展[J].环境工程,2016,34(1):31-35.LIU Haiyang,XIA Huaixiang,JIANG Chengyu,et al.Research advances in wet flue gas desulfurization wastewater treament technology in coal-fired power plant[J].Environmental Engineering,2016,34(1):31-35.
[3]连坤宙,陈景硕,刘朝霞,等.火电厂脱硫废水微滤、反渗透膜法深度处理试验研究[J].中国电力,2016,49(2):148-152.LIAN Kunzhou,CHEN Jingshuo,LIU Zhaoxia,et al.Experimental study on the reduction treatment of desulfurization wastewater in power plants by membran[J].Electric Power,2016,49(2):148-152.
[4]刘亚鹏,王金磊,陈景硕,等.火电厂脱硫废水预处理工艺优化及管式微滤膜实验研究[J].中国电力,2016,49(2):153-158.LIU Yapeng,WANG Jinlei,CHEN Jingshuo,et al.Optimization of FGD wastewater pretreatment technique for thermal power plant and test studies on tubular crossflow microfiltration process[J].Electric Power,2016,49(2):153-158.
[5]叶治安,韩琳,郭鹏飞,等.脱硫废水污泥脱水方式的比较研究[J].中国电力,2017,50(1):164-167.YE Zhian,HAN Lin,GUO Pengfei,et al.Comparative study on desulfurization wastewater sludge dewatering[J].Electric Power,2017,50(1):164-167.
[6]吴慧芳,胡文华.聚合氯化铝污泥吸附除磷的改性研究[J].中国环境科学,2011,31(8):1289-1294.WU Huifang,HU Wenhua.Adsorption removal of phosphorus from aqueous solution using modified polyaluminium chloride sludge[J].China Environmental Science,2011,31(8):1289-1294.
[7]李昂.污泥吸附除磷脱氮工艺及其数学模型研究[D].北京:中国矿业大学,2010.
[8]高永坤,童延斌,鲁建江.响应面分析法优化造纸污泥吸附剂除磷工艺[J].环境工程学报,2012,6(5):1727-1733.GAO Yongkun,TONG Yanbin,LU Jianjiang.Optimization of paper mill sludge adsorbent in treatment of phosphorus containing wastewater using response surface method[J].Chinese Journal of Environmental Engineering,2012,6(5):1727-1733.
[9]任伟超,周振,黄星宇,等.磷酸钙沉淀法同步去除污泥水中磷和腐殖质的优化研究[J].环境科学学报,2015,35(11):3545-3551.REN Weichao,ZHOU Zhen,HUANG Xingyu,et al.Optimization of simultaneous removal of phosphorus and humic substances from reject water by calcium phosphate precipitation[J].Acta Scientiae Circumstantiae,2015,35(11):3545-3551.
[10]陈小光,张萌,厉帅,等.磷酸钙盐结晶除磷工艺性能研究[J].环境工程学报,2013,7(7):2552-2556.CHEN Xiaoguang,ZHANG Meng,LI Shuai,et al.Performance of calcium phosphates crystallization process for phosphorus remova[J].Chinese Journal of Environmental Engineering,2013,7(7):2552-2556.
[11]CAO X,HARRIS W.Carbonate and magnesium interactive effect on calcium phosphate precipitation[J].Environmental Science&Technology,2008,42(2):436-442.
[12]REN Weichao,ZHOU Zhen,JIANG Luman,et al.A cost-effective method for the treatment of reject water from sludge dewatering process using supernatant from sludge lime stabilization[J].Separation and Purification Technology,2015,142:123-128.
[13]LIU Xin,ZHANG Lingfan.Removal of phosphate anions using the modified chitosan beads:Adsorption kinetic,isotherm and mechanism studies[J].Powder Technology,2015,277:112-119.
[14]LALLEY J,HAN C,LI X,et al.Phosphate adsorption using modified iron oxide-based sorbents in lake water:Kinetics,equilibrium,and column tests[J].Chemical Engineering Journal,2016,284:1386-1396.
[15]YANG Shuang,LI Lingyun,PEI Zhiguo,et al.Adsorption kinetics,isotherms and thermodynamics of Cr(III)on graphene oxide[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2014,457:100-106.
[16]YANG Jinbei,YU Meiqiong,QIU Ting.Adsorption thermodynamics and kinetics of Cr(VI)on KIP210 resin[J].Journal of Industrial and Engineering Chemistry,2014,20(2):480-486.
[17]YOUSEF R I,EI-ESWED B,AL-MUHTASEB A H.Adsorption characteristics of natural zeolites as solid adsorbents for phenol removal from aqueous solutions:Kinetics,mechanism,and thermodynamics studies[J].Chemical Engineering Journal,2011,171(3):1143-1149.
[18]KATAL R,BAEI M S,RAHMATI H T,et al.Kinetic,isotherm and thermodynamic study of nitrate adsorption from aqueous solution using modified rice husk[J].Journal of Industrial and Engineering Chemistry,2012,18(1):295-302.
[19]?tulajterová R,Medvecky ?. Effect of calcium ions on transformation brushite to hydroxyapatite in aqueous solutions[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2008,316(1):104-109.
[20]CHEN Y,SHEN C,RASHID S,et al.Biopolymer-induced morphology control of brushite for enhanced defluorination of drinking water[J].Journal of Colloid&Interface Science,2017,491:207-215.
[2]刘海洋,夏怀祥,江澄宇,等.燃煤电厂湿法脱硫废水处理技术研究进展[J].环境工程,2016,34(1):31-35.LIU Haiyang,XIA Huaixiang,JIANG Chengyu,et al.Research advances in wet flue gas desulfurization wastewater treament technology in coal-fired power plant[J].Environmental Engineering,2016,34(1):31-35.
[3]连坤宙,陈景硕,刘朝霞,等.火电厂脱硫废水微滤、反渗透膜法深度处理试验研究[J].中国电力,2016,49(2):148-152.LIAN Kunzhou,CHEN Jingshuo,LIU Zhaoxia,et al.Experimental study on the reduction treatment of desulfurization wastewater in power plants by membran[J].Electric Power,2016,49(2):148-152.
[4]刘亚鹏,王金磊,陈景硕,等.火电厂脱硫废水预处理工艺优化及管式微滤膜实验研究[J].中国电力,2016,49(2):153-158.LIU Yapeng,WANG Jinlei,CHEN Jingshuo,et al.Optimization of FGD wastewater pretreatment technique for thermal power plant and test studies on tubular crossflow microfiltration process[J].Electric Power,2016,49(2):153-158.
[5]叶治安,韩琳,郭鹏飞,等.脱硫废水污泥脱水方式的比较研究[J].中国电力,2017,50(1):164-167.YE Zhian,HAN Lin,GUO Pengfei,et al.Comparative study on desulfurization wastewater sludge dewatering[J].Electric Power,2017,50(1):164-167.
[6]吴慧芳,胡文华.聚合氯化铝污泥吸附除磷的改性研究[J].中国环境科学,2011,31(8):1289-1294.WU Huifang,HU Wenhua.Adsorption removal of phosphorus from aqueous solution using modified polyaluminium chloride sludge[J].China Environmental Science,2011,31(8):1289-1294.
[7]李昂.污泥吸附除磷脱氮工艺及其数学模型研究[D].北京:中国矿业大学,2010.
[8]高永坤,童延斌,鲁建江.响应面分析法优化造纸污泥吸附剂除磷工艺[J].环境工程学报,2012,6(5):1727-1733.GAO Yongkun,TONG Yanbin,LU Jianjiang.Optimization of paper mill sludge adsorbent in treatment of phosphorus containing wastewater using response surface method[J].Chinese Journal of Environmental Engineering,2012,6(5):1727-1733.
[9]任伟超,周振,黄星宇,等.磷酸钙沉淀法同步去除污泥水中磷和腐殖质的优化研究[J].环境科学学报,2015,35(11):3545-3551.REN Weichao,ZHOU Zhen,HUANG Xingyu,et al.Optimization of simultaneous removal of phosphorus and humic substances from reject water by calcium phosphate precipitation[J].Acta Scientiae Circumstantiae,2015,35(11):3545-3551.
[10]陈小光,张萌,厉帅,等.磷酸钙盐结晶除磷工艺性能研究[J].环境工程学报,2013,7(7):2552-2556.CHEN Xiaoguang,ZHANG Meng,LI Shuai,et al.Performance of calcium phosphates crystallization process for phosphorus remova[J].Chinese Journal of Environmental Engineering,2013,7(7):2552-2556.
[11]CAO X,HARRIS W.Carbonate and magnesium interactive effect on calcium phosphate precipitation[J].Environmental Science&Technology,2008,42(2):436-442.
[12]REN Weichao,ZHOU Zhen,JIANG Luman,et al.A cost-effective method for the treatment of reject water from sludge dewatering process using supernatant from sludge lime stabilization[J].Separation and Purification Technology,2015,142:123-128.
[13]LIU Xin,ZHANG Lingfan.Removal of phosphate anions using the modified chitosan beads:Adsorption kinetic,isotherm and mechanism studies[J].Powder Technology,2015,277:112-119.
[14]LALLEY J,HAN C,LI X,et al.Phosphate adsorption using modified iron oxide-based sorbents in lake water:Kinetics,equilibrium,and column tests[J].Chemical Engineering Journal,2016,284:1386-1396.
[15]YANG Shuang,LI Lingyun,PEI Zhiguo,et al.Adsorption kinetics,isotherms and thermodynamics of Cr(III)on graphene oxide[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2014,457:100-106.
[16]YANG Jinbei,YU Meiqiong,QIU Ting.Adsorption thermodynamics and kinetics of Cr(VI)on KIP210 resin[J].Journal of Industrial and Engineering Chemistry,2014,20(2):480-486.
[17]YOUSEF R I,EI-ESWED B,AL-MUHTASEB A H.Adsorption characteristics of natural zeolites as solid adsorbents for phenol removal from aqueous solutions:Kinetics,mechanism,and thermodynamics studies[J].Chemical Engineering Journal,2011,171(3):1143-1149.
[18]KATAL R,BAEI M S,RAHMATI H T,et al.Kinetic,isotherm and thermodynamic study of nitrate adsorption from aqueous solution using modified rice husk[J].Journal of Industrial and Engineering Chemistry,2012,18(1):295-302.
[19]?tulajterová R,Medvecky ?. Effect of calcium ions on transformation brushite to hydroxyapatite in aqueous solutions[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2008,316(1):104-109.
[20]CHEN Y,SHEN C,RASHID S,et al.Biopolymer-induced morphology control of brushite for enhanced defluorination of drinking water[J].Journal of Colloid&Interface Science,2017,491:207-215.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |