加载连续流电磁波对回流污泥脱氢酶活性的影响
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摘要
为了探究加载电磁波对回流污泥的影响,选取脱氢酶活性为代表,取污水处理厂回流污泥,采用连续流2 450 MHz电磁波进行加载,探究电磁波加载功率、加载时间和污泥流量对污泥生物活性的影响,考察将电磁波加载污水处理厂回流污泥实现污泥过程减量的可行性。当电磁波加载功率为100 W时,污泥脱氢酶活性提高了85. 38%;在加载功率为100～600 W、加载时间为25～150 s时,脱氢酶活性呈显著下降趋势,且与污泥温度和上清液SCOD呈此消彼长之势;当污泥流量为2 L/h时,污泥脱氢酶活性突然显著降低,之后随污泥流量增大则活性逐渐上升。相关性分析结果显示,污泥脱氢酶活性与加载功率、加载时间呈显著负相关,与污泥流量呈显著正相关,影响程度的大小顺序为:污泥流量>加载功率>加载时间;同时,污泥脱氢酶活性与温度、SCOD均呈显著的负相关。
To verify the feasibility for reduction of sludge through electromagnetic wave loading returned sludge,dehydrogenase activity was selected as the representative,and the effects of loading power,loading time and sludge flow on the dehydrogenase activity of returned sludge taken from sewage treatment plant were studied under the continuous flow electromagnetic wave with 2450 MHz. The results showed that the dehydrogenase activity of returned sludge increased by 85. 38% when the electromagnetic wave power was 100 W. However the dehydrogenase activity showed a significant downward trend and was negatively related to the sludge temperature and SCOD of supernatant when the loading power and loading time were 100-600 W and 25-150 s respectively. In addition,the dehydrogenase activity decreased rapidly when the sludge flow was 2 L/h,and then it gradually increased with the increase of sludge flow. The results of correlation analysis revealed that the dehydrogenase activity was negatively correlated with the loading power and loading time of electromagnetic wave,temperature and SCOD,while positively correlated with the sludge flow. The influence level of the factors was: sludge flow > loading power > loading time.
To verify the feasibility for reduction of sludge through electromagnetic wave loading returned sludge,dehydrogenase activity was selected as the representative,and the effects of loading power,loading time and sludge flow on the dehydrogenase activity of returned sludge taken from sewage treatment plant were studied under the continuous flow electromagnetic wave with 2450 MHz. The results showed that the dehydrogenase activity of returned sludge increased by 85. 38% when the electromagnetic wave power was 100 W. However the dehydrogenase activity showed a significant downward trend and was negatively related to the sludge temperature and SCOD of supernatant when the loading power and loading time were 100-600 W and 25-150 s respectively. In addition,the dehydrogenase activity decreased rapidly when the sludge flow was 2 L/h,and then it gradually increased with the increase of sludge flow. The results of correlation analysis revealed that the dehydrogenase activity was negatively correlated with the loading power and loading time of electromagnetic wave,temperature and SCOD,while positively correlated with the sludge flow. The influence level of the factors was: sludge flow > loading power > loading time.
引文
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[2]Eskicioglu C,Droste R L,Kennedy K J,et al.Performance of anaerobic waste activated sludge digesters after microwave pretreatment[J].Water Environ Res,2007,79(11):2265-2273.
[3]胡坚.寄生霉菌的微波效应研究[D].武汉:华中农业大学,2009.Hu Jian.Effect of Microwave on Aspergillus Parasiticus[D].Wuhan:Huazhong Agricultural University,2009(in Chinese).
[4]田禹,方琳,黄君礼,等.微波辐射预处理对污泥结构及脱水性能的影响[J].中国环境科学,2006,26(4):459-463.Tian Yu,Fang Lin,Huang Junli,et al.Influence of microwave pretreatment on activated sludge structure and dewaterability[J].China Environmental Science,2006,26(4):459-463(in Chinese).
[5]周翠红,常俊英,陈家庆,等.微波对污水污泥脱水特性及形态影响[J].土木建筑与环境工程,2013,35(1):135-139.Zhou Cuihong,Chang Junying,Chen Jiaqing,et al.Impacts of microwave on dewater ability and morphological feature of sewage sludge[J].Journal of Civil,Architectural&Environmental Engineering,2013,35(1):135-139(in Chinese).
[6]王亚炜,肖庆聪,阎鸿,等.基于微波预处理的源头污泥减量研究[J].中国给水排水,2013,29(15):19-23.Wang Yawei,Xiao Qingcong,Yan Hong,et al.Source sludge reduction by conventional activated sludge process combined with microwave pretreatment[J].China Water&Wastewater,2013,29(15):19-23(in Chinese).
[7]王一娜.微波诱导实现污泥减量的研究[D].大连:大连工业大学,2010.Wang Yina.Research on Sewage Sludge Reduction Technology by Microwave Induced Process[D].Dalian:Dalian Polytechnic University,2010(in Chinese).
[8]孙德栋,刘佳,马春,等.微波辐照与碱联合应用实现剩余污泥减量的实验研究[J].大连工业大学学报,2009,28(3):195-199.Sun Dedong,Liu Jia,Ma Chun,et al.Reduction of sludge by microwave irradiation and alkali treatment[J].Journal of Dalian Polytechnic University,2009,28(3):195-199(in Chinese).
[9]Wang Y W,Xiao Q C,Liu J B,et al.Pilot-scale study of sludge pretreatment by microwave and sludge reduction based on lysis-cryptic growth[J].Bioresour Technol,2015,190:140-147.
[10]Hong S M,Park J K,Lee Y O,et al.Mechanisms of microwave irradiation involved in the destruction of fecal coliforms from biosolids[J].Water Res,2004,38:1615-1625.
[11]Wang Y W,Wei Y S,Liu J X,et al.Effect of H2O2dosing strategy on sludge pretreatment by microwave-H2O2advanced oxidation process[J].J Hazard Mater,2009,169:680-684.
[12]桑稳姣,方笑笑,田中凯,等.污泥加载量对连续流电磁波污泥脱水的影响[J].中国给水排水,2014,30(1):26-29.Sang Wenjiao,Fang Xiaoxiao,Tian Zhongkai,et al.Effect of sludge loading on continuous flow dewatering with electromagnetic wave[J].China Water&Wastewater,2014,30(1):26-29(in Chinese).
[13]桑稳姣,方笑笑,龚雅君,等.连续流2 450 MHz电磁波剩余污泥脱水与溶出效果研究[J].中国环境科学,2014,34(8):2024-2029.Sang Wenjiao,Fang Xiaoxiao,Gong Yajun,et al.Study on dewater ability and solubilization of intracellular substances during sludge dewatered by continuous inflow with 2 450 MHz electromagnetic wave[J].China Environmental Science,2014,34(8):2024-2029(in Chinese).
[14]周恢,左永生,赵怀颖,等.MBR中污泥脱氢酶活性测定方法的改进[J].中国环保产业,2006,(12):31-33.Zhou Hui,Zuo Yongsheng,Zhao Huaiying,et al.Improvement of determination on sludge dehydrogenase activity in MBR[J].China Environmental Protection Industry,2006,(12):31-33(in Chinese).
[15]谢敏,李好,刘小波,等.微波调质对剩余污泥结构及其脱水性能的影响[J].环境工程学报,2016,10(8):4457-4461.Xie Min,Li Hao,Liu Xiaobo,et al.Effects of microwave conditioning on structure and dewaterability of sludge flocs[J].Chinese Journal of Environmental Engineering,2016,10(8):4457-4461(in Chinese).
[16]Qiang Y,Heng Y L,Zhong L,et al.Physical and chemical properties of waste-activated sludge after microwave treatment[J].Water Res,2010,44(9):2841-2849.
[17]任伯帜,侯保林,陈文文,等.微波辐射对污水处理厂动态流活性污泥性能的影响研究[J].环境科学学报,2013,33(6):1624-1628.Ren Bozhi,Hou Baolin,Chen Wenwen,et al.Impact on properties of the sewage treatment plant dynamic flow activated sludge by microwave radiation[J].Acta Scientiae Circumstantiae,2013,33(6):1624-1628(in Chinese).
[18]罗海健,付长亮,宁寻安,等.微波预处理对制革污泥絮凝脱水性能的影响[J].环境工程学报,2013,7(5):1933-1938.Luo Haijian,Fu Changliang,Ning Xunan,et al.Influence of microwave pretreatment on tannery sludge flocculating and dewatering performances[J].Chinese Journal of Environmental Engineering,2013,7(5):1933-1938(in Chinese).
[19]任伯帜,侯保林,陈文文,等.不同流态下微波辐射对污水污泥性质的影响研究[J].环境科学学报,2013,33(7):1907-1911.Ren Bozhi,Hou Baolin,Chen Wenwen,et al.Effect of microwave radiation treatment on sewage sludge under different flow patterns[J].Acta Scientiae Circumstantiae,2013,33(7):1907-1911(in Chinese).