不同填料对地下渗滤系统脱氮效果的影响
|
摘要
为改善地下渗滤系统(SWIS)脱氮效果,以煤渣和生物基质为填料,构建了1~#、2~#、3~#3套装置,研究水力负荷对地下渗滤系统脱氮效果的影响。结果表明,当水力负荷为10 cm/d时,1~#装置对NH_4~+-N、TN平均去除率分别为92.78%、54.77%,但当水力负荷为20 cm/d时装置因渗透性较差无法正常运行。2~#、3~#装置分别在水力负荷为10、20cm/d下运行时,对NH_4~+-N平均去除率分别下降了24.26个和14.57个百分点,对TN平均去除率分别下降了13.37个和8.13个百分点;TN的去除率变化较大,但其脱氮能力有所提高。2~#装置脱氮效果最好。适当添加生物基质可有利于TN的去除,并保持着良好的渗透性能。因此,为保证改良的SWIS在水力负荷为20 cm/d下正常长期运行,则与渗透性能较好的煤渣配比时生物基质的量应保持适当的比例。
In order to improve the nitrogen removal effect of surface wastewater infiltration system,three sets of improved units of 1~#,2~#and 3~#were constructed with cinder and biological matrix to study on the effect of fillers on nitrogen removal of subsurface wastewater infiltration system under different hydraulic loads.The results showed that the average removal rates of NH_4~+-N,TN in the 1~#device were 92.78%,54.77%respectively,when the hydraulic load was 10 cm/d.But permeability of the set was poor when the hydraulic load was 20 cm/d,led to it could not work normally.While two devices of 2~#and 3~#were operated at hydraulic loads of 10 and 20 cm/d,the average removal rate of NH_4~+-N were decreased by 24.26 and 14.57 percent point,and the average removal rate of TN decreased by 13.37 and 8.13 percent point respectively.The removal rate of TN varied greatly,but the denitrification capacity had improved.The 2~#set had the best nitrogen removal effect.Appropriate addition of the biological matrix,it could facilitate the removal of TN and maintain good permeability.Therefore,in order to ensure improved SWIS that has a normal long-term operation under a hydraulic load of 20cm/d,the amount of biological matrix should be kept in an appropriate ratio when it is matched with cinder with better permeability.
In order to improve the nitrogen removal effect of surface wastewater infiltration system,three sets of improved units of 1~#,2~#and 3~#were constructed with cinder and biological matrix to study on the effect of fillers on nitrogen removal of subsurface wastewater infiltration system under different hydraulic loads.The results showed that the average removal rates of NH_4~+-N,TN in the 1~#device were 92.78%,54.77%respectively,when the hydraulic load was 10 cm/d.But permeability of the set was poor when the hydraulic load was 20 cm/d,led to it could not work normally.While two devices of 2~#and 3~#were operated at hydraulic loads of 10 and 20 cm/d,the average removal rate of NH_4~+-N were decreased by 24.26 and 14.57 percent point,and the average removal rate of TN decreased by 13.37 and 8.13 percent point respectively.The removal rate of TN varied greatly,but the denitrification capacity had improved.The 2~#set had the best nitrogen removal effect.Appropriate addition of the biological matrix,it could facilitate the removal of TN and maintain good permeability.Therefore,in order to ensure improved SWIS that has a normal long-term operation under a hydraulic load of 20cm/d,the amount of biological matrix should be kept in an appropriate ratio when it is matched with cinder with better permeability.
引文
[1]王鑫,李海波,孙铁珩.地下渗滤污水处理系统中基质的研究进展[J].环境科学与技术,2010,33(12):92-95.
[2]杨铮铮,张思,刘春敬,等.基质混配地下渗滤系统脱氮除磷机理研究[J].水处理技术,2016,42(1):56-61.
[3]孔刚,许昭怡,王勇,等.土壤介质对地下渗滤系统去除污染物的影响[J].环境科学与技术,2011,34(S2):75-78.
[4]李晓东,刘冉,郭锋,等.干湿比对砂土地下渗滤系统净化能力的影响[J].环境工程,2015,33(1):53-56.
[5]李英华,李海波,王鑫,等.生物填料地下渗滤系统对生活污水的脱氮[J].环境工程学报,2013,7(9):3369-3374.
[6]秦伟,王志强,谢建治,等.分层填料地下渗滤系统处理农村分散生活污水[J].环境工程学报,2013,7(11):4269-4274.
[7]严群,吴一蘩,董卫华,等.强化填料土地毛管渗滤系统处理生活污水的研究[J].环境污染与防治,2008,30(5):30-70.
[8]杨健,严群,吴一蘩,等.分层填料土地毛管渗滤系统处理生活污水的研究[J].环境科学与技术,2008,31(6):107-110.
[9]张建,黄霞,刘超翔,等.地下渗滤处理村镇生活污水的中试[J].环境科学,2002,23(6):57-61.
[10]张建,黄霞,魏杰,等.地下渗滤污水处理系统的氮磷去除机理[J].中国环境科学,2002,22(5):438-441.
[11]李海波,马吉福,王鑫,等.水力负荷对污水地下渗滤系统处理效果的影响[J].环境工程学报,2016,10(2):544-550.
[12]严群,汪宏,韩冬雪,等.不同填料地下渗滤系统处理生活污水研究[J].工业水处理,2016,36(4):65-68.
[13]国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002.
[14] SAKADEVAN K, BAVOR H J. Phosphate adsorption characteristics of soils, slags and zeolite to be used as substrates in constructed wetland systems[J].Water Research,1998,32(2):393-399.
[15]张天永,王智超,姜爽,等.煤渣在水处理方面的应用研究进展[J].现代化工,2018,38(3):32-36.
[2]杨铮铮,张思,刘春敬,等.基质混配地下渗滤系统脱氮除磷机理研究[J].水处理技术,2016,42(1):56-61.
[3]孔刚,许昭怡,王勇,等.土壤介质对地下渗滤系统去除污染物的影响[J].环境科学与技术,2011,34(S2):75-78.
[4]李晓东,刘冉,郭锋,等.干湿比对砂土地下渗滤系统净化能力的影响[J].环境工程,2015,33(1):53-56.
[5]李英华,李海波,王鑫,等.生物填料地下渗滤系统对生活污水的脱氮[J].环境工程学报,2013,7(9):3369-3374.
[6]秦伟,王志强,谢建治,等.分层填料地下渗滤系统处理农村分散生活污水[J].环境工程学报,2013,7(11):4269-4274.
[7]严群,吴一蘩,董卫华,等.强化填料土地毛管渗滤系统处理生活污水的研究[J].环境污染与防治,2008,30(5):30-70.
[8]杨健,严群,吴一蘩,等.分层填料土地毛管渗滤系统处理生活污水的研究[J].环境科学与技术,2008,31(6):107-110.
[9]张建,黄霞,刘超翔,等.地下渗滤处理村镇生活污水的中试[J].环境科学,2002,23(6):57-61.
[10]张建,黄霞,魏杰,等.地下渗滤污水处理系统的氮磷去除机理[J].中国环境科学,2002,22(5):438-441.
[11]李海波,马吉福,王鑫,等.水力负荷对污水地下渗滤系统处理效果的影响[J].环境工程学报,2016,10(2):544-550.
[12]严群,汪宏,韩冬雪,等.不同填料地下渗滤系统处理生活污水研究[J].工业水处理,2016,36(4):65-68.
[13]国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002.
[14] SAKADEVAN K, BAVOR H J. Phosphate adsorption characteristics of soils, slags and zeolite to be used as substrates in constructed wetland systems[J].Water Research,1998,32(2):393-399.
[15]张天永,王智超,姜爽,等.煤渣在水处理方面的应用研究进展[J].现代化工,2018,38(3):32-36.