摘要
检测植物处理污水厂生化尾水的效果和分析植物生理生长特性,为西北干旱半干旱地区人工湿地污水处理系统合理配置土著湿地植物提供理论依据。在复合垂直流-水平流人工湿地中种植芦苇和香蒲,生活污水处理装置的二级生化出水胁迫,植物移栽成活后和收割之前分别检测植物的生理、生长指标和光合参数。结果表明,CODCr、NH4^+-N、TN、TP的去除率,种植植物期间分别为79.32%、85.69%、82.17%、91.76%,植物收割后分别为71.34%、58.45%、60.49%、89.86%;芦苇最高株高达到380 cm,香蒲最高株高达到320 cm;地上部分生物量香蒲最高达到4.15kg,芦苇最高达到7.55 kg;香蒲的净光合速率(Pn)分别增加了6.35%、3.99%、22.39%,芦苇的净光合速率(Pn)则分别增加了42.20%、5.26%、8.96%。2种湿地植物在污水胁迫下表现出一定的防御能力,但是抗污能力存在一定的差异。
Wetland plants are important components of constructed wetland wastewater treatment systems.Pollutant removal efficiency in constructed wetlands is closely related to the growth and physiological characteristics of wetland plants.We examined the physiological characteristics of two plants(Phragmites australis and Typha)in a constructed wetland designed for purifying effluent from a secondary wastewater treatment plant(WWTP)and pollutant removal efficiency was analyzed.The objective was to provide a theoretical basis for the rational allocation of wetland plants for constructed wetland wastewater treatment systems designed for the arid and semiarid regions of northwest China.Phragmites australis and Typha plants were transplanted to an artificial wetland with descending and ascending vertical flows and horizontal subsurface flow and stressed by the effluent from a secondary WWTP.The plant physiology,growth indicators and photosynthetic parameters of the two plants were tested after survival and before harvest over three days.The removal rates of COD Cr,NH4^+-N,TN and TP were,respectively,79.32%,85.69%,82.17%,and 91.76%during the plant growing period and 71.34%,58.45%,60.49%and 89.86%after the plants were harvested.The maximum height and above ground biomass of Phragmites australis were up to 380cm and 7.55kg,and the height and aboveground biomass of Typha were up to 320cm and 4.15kg.The net photosynthetic rate(Pn)of Typha for each treatment increased by 6.35%,3.99%,and 22.39%,respectively,and the net photosynthetic rate(Pn)of Phragmites australis increased by 42.20%,5.26%,and 8.96%,respectively.The two wetland plants showed some tolerance to wastewater stress,but the pollutant resistance of the two plants differed.
作者
张国珍
亢瑜
尚兴宝
ZHANG Guo-zhen;KANG Yu;SHANG Xing-bao(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,P.R.China;North China Municipal Engineering Design&Research Institute Co.,Ltd.,Tianjin 300074,P.R.China)
出处
《水生态学杂志》
CSCD
北大核心
2020年第3期123-128,共6页
Journal of Hydroecology
基金
甘肃省重点研发计划(17YF1NA056)
长江学者和创新团队发展计划(IRT0966)。
关键词
生化尾水
胁迫
生理特性
芦苇
香蒲
biochemical tail water
stress
physiological characteristics
Phragmites australis
Typha
