新型释氧材料制备及对湿地堵塞解除研究
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摘要
针对人工湿地内部DO含量较低引起的生物性堵塞,污水处理效率下降的问题,采用投加释氧材料的方法来提高湿地内部DO含量,修复生物性堵塞。采用CaO_2为释氧剂制备释氧材料,进行释氧性能研究。结果表明:采用大孔弱酸性丙烯酸系阳离子交换树脂作为包埋剂制成的释氧材料释氧性能最佳。在模拟人工湿地污水系统中,释氧材料可使反应器中DO质量浓度在15d内保持在5.0mg/L以上,并且pH保持中性水平,相较未投加释氧材料的对照组,30d内COD的平均降解效率提高125%。投加释氧材料可以使发生生物性堵塞的人工湿地系统在连续运行条件下基质孔隙率在15d内恢复到初始水平的83%左右,并且相较机械曝气具有操作便捷、不受环境限制以及成本低廉的优点。
Aiming at the problem of biological clogging and the decline of sewage treatment efficiency caused by low DO content in the constructed wetland,DO in wetland was improved and biological clogging was repaired by adding oxygen releasing material.CaO_2 was used as oxygen releasing agent to prepare oxygen releasing material,and study the performance of oxygen release.The results showed that the oxygen release performance of the oxygen releasing material made from the macroporous weak acid acrylic acid cation exchange resin as the entrapment agent was the best.In simulated wetland sewage treatment system,oxygen releasing material could kept DO concentration above 5.0 mg/L in 15 days and maintain pH at neutral level.Compared with the control group with no oxygen releasing material,the average degradation efficiency of COD in 30 days could be increased by 125%.The matrix porosity of the constructed wetland system with biological clogging could be restored to 83% of the initial level in 15 days.Compared with mechanical aeration,it had the advantages of convenient operation,unrestricted environment and low cost.
Aiming at the problem of biological clogging and the decline of sewage treatment efficiency caused by low DO content in the constructed wetland,DO in wetland was improved and biological clogging was repaired by adding oxygen releasing material.CaO_2 was used as oxygen releasing agent to prepare oxygen releasing material,and study the performance of oxygen release.The results showed that the oxygen release performance of the oxygen releasing material made from the macroporous weak acid acrylic acid cation exchange resin as the entrapment agent was the best.In simulated wetland sewage treatment system,oxygen releasing material could kept DO concentration above 5.0 mg/L in 15 days and maintain pH at neutral level.Compared with the control group with no oxygen releasing material,the average degradation efficiency of COD in 30 days could be increased by 125%.The matrix porosity of the constructed wetland system with biological clogging could be restored to 83% of the initial level in 15 days.Compared with mechanical aeration,it had the advantages of convenient operation,unrestricted environment and low cost.
引文
[1]郭烨烨.间歇曝气垂直潜流人工湿地的污水净化效果及微生物机理研究[D].济南:山东大学,2014.
[2]WOOD T M.Sediment oxygen demand in upper Klamath and Agency Lakes[M].Portland:US Department of the Interior,1999:23-25.
[3]LI G L,FU Q,FENG Y,et al.Chaos analysis of the changing regularity of the dissolved oxygen of Nenjiang River water body[J].Journal of Safety and Environment,2007,7(6):65-68.
[4]KHODAVEISI J,BANEJAD H,AFKHAMI A,et al.Synthesis of calcium peroxide nanoparticles as an innovative reagent for in situchemical oxidation[J].Journal of Hazardous Materials,2011,192(3):1437-1440.
[5]LIN C W,CHEN L H,YET POLE I,et al.Microbial communitiesand biodegradation in lab-scale BTEX-contaminated groundwater remediation using an oxygen-releasing reactive barrier[J].Bioprocessand Biosystems Engineering,2010,33(3):383-391.
[6]张永祥,梁建奎,王然,等.地下水PRB原位生物修复中一种释氧材料的改进技术及效果分析[J].环境工程学报,2012,6(11):3910-3914.
[7]刘涉江,刘秀丽,王少博.CPC/CaO2氧缓释复合材料的制备及其释氧性能探讨[J].环境工程学报,2010,4(5):971-974.
[8]翟永清,丁士文,姚子华,等.CaO2对阳离子蓝染料脱色效果研究[J].化学世界,2004,40(10):507-510.
[9]李木金,刘涉江,姜斌,等.固体释氧化合物用于地下水生物修复[J].中国给水排水,2005,21(10):28-30.
[10]张亚雷,章明,李建华,等.过氧化钙不同投加方式对底泥磷的释放的抑制效果分析[J].环境科学,2006,27(11):2188-2193.
[11]张丹.CaO2对控制河道底泥磷释放效果的研究[J].环境工程,2012,30(增刊2):532-534.
[12]ARIENZO M.Degradation of 2,4,6-trinitrotoluene in water and soil slurry utilizing a calcium peroxide compound[J].Chemosphere,2000,40(4):331-337.
[13]QIAN Y,ZHOU X,ZHANG Y,et al.Performance and properties of nanoscale calcium peroxide for toluene removal[J].Chemosphere,2013,91(5):717-723.
[14]李明,朱晓明,阮晓红,等.包裹缓释外壳的缓释氧材料的性能影响分析[J].地下水,2012,34(6):173-175.
[15]MATZINGER A,MULLER B,NIEDERHAUSER P,et al.Hypolimnetic oxygen consumption by sediment-based reduced substances in former eutrophic lakes[J].Limnology and Oceanography,2010,55(5):2073-2084.
[16]ZHANG L,SHEN Q,HU H,et al.Impacts of Corbicula fluminea on oxygen uptake and nutrient fluxes across the sediment-water interface[J].Water,Air,&Soil Pollution,2011,220(1/2/3/4):399-411.
[17]李磊,王云龙,蒋玫,等.春、夏季长江口邻近海域COD分布特征、影响因素及对富营养化的贡献[J].海洋通报,2012,44(3):329-335.
[18]朱卓毅,张经,吴璧,等.长江口外颗粒有机碳及光合色素在不同溶氧水平下早期降解速率研究[J].海洋与湖沼,2013,44(1):1-8.
[2]WOOD T M.Sediment oxygen demand in upper Klamath and Agency Lakes[M].Portland:US Department of the Interior,1999:23-25.
[3]LI G L,FU Q,FENG Y,et al.Chaos analysis of the changing regularity of the dissolved oxygen of Nenjiang River water body[J].Journal of Safety and Environment,2007,7(6):65-68.
[4]KHODAVEISI J,BANEJAD H,AFKHAMI A,et al.Synthesis of calcium peroxide nanoparticles as an innovative reagent for in situchemical oxidation[J].Journal of Hazardous Materials,2011,192(3):1437-1440.
[5]LIN C W,CHEN L H,YET POLE I,et al.Microbial communitiesand biodegradation in lab-scale BTEX-contaminated groundwater remediation using an oxygen-releasing reactive barrier[J].Bioprocessand Biosystems Engineering,2010,33(3):383-391.
[6]张永祥,梁建奎,王然,等.地下水PRB原位生物修复中一种释氧材料的改进技术及效果分析[J].环境工程学报,2012,6(11):3910-3914.
[7]刘涉江,刘秀丽,王少博.CPC/CaO2氧缓释复合材料的制备及其释氧性能探讨[J].环境工程学报,2010,4(5):971-974.
[8]翟永清,丁士文,姚子华,等.CaO2对阳离子蓝染料脱色效果研究[J].化学世界,2004,40(10):507-510.
[9]李木金,刘涉江,姜斌,等.固体释氧化合物用于地下水生物修复[J].中国给水排水,2005,21(10):28-30.
[10]张亚雷,章明,李建华,等.过氧化钙不同投加方式对底泥磷的释放的抑制效果分析[J].环境科学,2006,27(11):2188-2193.
[11]张丹.CaO2对控制河道底泥磷释放效果的研究[J].环境工程,2012,30(增刊2):532-534.
[12]ARIENZO M.Degradation of 2,4,6-trinitrotoluene in water and soil slurry utilizing a calcium peroxide compound[J].Chemosphere,2000,40(4):331-337.
[13]QIAN Y,ZHOU X,ZHANG Y,et al.Performance and properties of nanoscale calcium peroxide for toluene removal[J].Chemosphere,2013,91(5):717-723.
[14]李明,朱晓明,阮晓红,等.包裹缓释外壳的缓释氧材料的性能影响分析[J].地下水,2012,34(6):173-175.
[15]MATZINGER A,MULLER B,NIEDERHAUSER P,et al.Hypolimnetic oxygen consumption by sediment-based reduced substances in former eutrophic lakes[J].Limnology and Oceanography,2010,55(5):2073-2084.
[16]ZHANG L,SHEN Q,HU H,et al.Impacts of Corbicula fluminea on oxygen uptake and nutrient fluxes across the sediment-water interface[J].Water,Air,&Soil Pollution,2011,220(1/2/3/4):399-411.
[17]李磊,王云龙,蒋玫,等.春、夏季长江口邻近海域COD分布特征、影响因素及对富营养化的贡献[J].海洋通报,2012,44(3):329-335.
[18]朱卓毅,张经,吴璧,等.长江口外颗粒有机碳及光合色素在不同溶氧水平下早期降解速率研究[J].海洋与湖沼,2013,44(1):1-8.
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