黑土洼潜流人工湿地净化水质效果总体分析

基于2004—2009年黑土洼人工湿地水质长期监测资料,对人工湿地整体系统以及潜流湿地中3个不同净化区的水质净化效果进行了总结分析,结果表明,各项水质去除率平均达到40%以上,水质由进水Ⅴ—劣Ⅴ类水质,达到出水水质Ⅲ—Ⅳ类,整体水质净化效果较为明显;人工湿地在常温期(6月1日—10月15日)的水质净化效果要优于过渡期(3月15日—6月1日)和低温期(10月15日—3月15日);在潜流人工湿地的3个净化区中,Ⅰ区水质净化效果最好,其次为Ⅱ区和Ⅲ区;此外,在潜流湿地单元中,一级植物碎石床净化水质,总体上达到总去除率的50%以上。

Analysis on Water Quality Purifying Effect of Heituwa Subsurface flow Constructed Wetland

Based on the long-term monitoring water quality data of 2004—2009 in Heituwa constructed wetland,water quality purifying effect of overall constructed wetland system and three different areas of subsurface flow constructed wetland were analyzed.The results showed that water quality removal rate reached more than 40% averagely;Water quality standard changed from class five to class three and four;the overall water quality purification effect is more obvious.Water quality purification effect of constructed wetland at normal temperature phase(6.1 to 10.15) was better than the transition period(3.15 to 6.1) and low-temperature period(10.15 to 3.15).Water quality purification effect of the first district was best in three purification districts of subsurface flow constructed wetland,followed by the second district and the third zone.In addition,the first plant and gravel-bed in the subsurface flow wetland unit has the largest capability of water quality purification and reaches over 50% of the total wastewater removal rate.