人工地下湿地对污水中指示病原体、有机物和 LAS 清洁剂的去除作用。
Indicator pathogens, organic matter and LAS detergent removal from wastewater by constructed subsurface wetlands.
机构信息
Department of Environmental Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
出版信息
J Environ Health Sci Eng. 2014 Feb 28;12(1):52. doi: 10.1186/2052-336X-12-52.
BACKGROUND
Constructed wetland is one of the natural methods of municipal and industrial wastewater treatments with low initial costs for construction and operation as well as easy maintenance. The main objective of this study is to determine the values of indicator bacteria removal, organic matter, TSS, ammonia and nitrate affecting the wetland removal efficiency.
RESULTS
The average concentration of E. coli and total coliform in the input is 1.127 × 1014 and 4.41 × 1014 MPN/100 mL that reached 5.03 × 1012 and 1.13 × 1014 MPN/100 mL by reducing 95.5% and 74.4% in wetland 2. Fecal streptococcus reached from the average 5.88 × 1014 in raw wastewater to 9.69 × 1012 in the output of wetland 2. Wetland 2 could reduce 1.5 logarithmic units of E. coli. The removal efficiency of TSS for the wetlands is 68.87%, 71.4%, 57.3%, and 66% respectively.
CONCLUSIONS
The overall results show that wetlands in which herbs were planted had a high removal efficiency about the indicator pathogens, organic matter, LAS detergent in comparison to a control wetland (without canes) and could improve physicochemical parameters (DO, ammonia, nitrate, electrical conductivity, and pH) of wastewater.
背景
人工湿地是一种用于处理城市和工业废水的自然方法，具有建设和运营初期成本低、易于维护的特点。本研究的主要目的是确定影响湿地去除效率的指示菌去除、有机物、TSS、氨和硝酸盐的数值。
结果
输入的大肠杆菌和总大肠菌群的平均浓度分别为 1.127×1014 和 4.41×1014MPN/100mL，通过湿地 2 的减少，分别达到 5.03×1012 和 1.13×1014MPN/100mL，减少了 95.5%和 74.4%。粪便链球菌从原水中的平均 5.88×1014 降至湿地 2 出口处的 9.69×1012。湿地 2 可将大肠杆菌减少 1.5 个对数单位。湿地对 TSS 的去除效率分别为 68.87%、71.4%、57.3%和 66%。
结论
总体结果表明，与对照湿地（无藤条）相比，种植草本植物的湿地对指示病原体、有机物、LAS 洗涤剂具有较高的去除效率，并能改善废水的理化参数（DO、氨、硝酸盐、电导率和 pH）。
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