摘要
对于高含沙污染河流,砂滤人工湿地系统起到较好处理效果,砂滤系统可降低湿地堵塞的危险性,保证湿地长期稳定运行。通过近1年连续监测,系统对悬浮物去除率最高达96%,且不受季节变化影响;水利负荷小幅度变化条件下,对CODMn、BOD5、TP的处理效果影响小,TP去除率与水利负荷存在一定相关关系,相关性较弱;BOD5、TP去除率基本不受季节变化影响,TN、NH4+-N去除率和季节变化存在相关关系,NH4+-N同水温存在相关系数为0.96的正相关性,TN的去除效果呈现夏季>秋季>春季>冬季的特征。在监测期间,砂滤湿地系统对BOD5的去除率一般在20%～50%,COD去除率为10%～40%,TP去除率为7%～70%,NH4+-N去除率最高可达86%。
The combination of sand-filter and constructed wetland is efficient for polluted river water with high-suspended solid, it grantees normal operation without clogging for a relative long term. After one year continue monitoring of sand-filter constructed wetland system, the result showed that the removal rate of suspended solid, which is no influence by season change, reach 70% in average, 96% in highest level; if the hydraulic load has a little change, there is no correlation between removal rate of CODMn, BOD5, with change of the hydraulic load. On the contrast, the removal rate of NH4^＋-N has a good correlation with correlation coefficient of 0.96. the removal capacity of TN by using system is summer、autumn、spring and winter from high to low. During testing period, the range of removal rate of BOD5, COD, TP and NH4^＋-N reach 20% -50%, 10%-40%, 7% -70% and 0- 86%, respectively.
出处
《水处理技术》
CAS
CSCD
北大核心
2008年第8期49-54,共6页
Technology of Water Treatment
基金
中德合作官厅水库治理项目(科技部国际合作2002DFG00023)
关键词
砂滤
人工湿地
污染河水
sand-filter
constructed
polluted river water
