互叶白千层(Melaleuca alternifolia)浮床对生活污水净化效果研究初报

互叶白千层(Melaleuca alternifolia)为速生常绿木本植物,它产生的茶树油广泛应用于医药保健工业.该文研究了互叶白千层浮床系统对生活污水的净化能力,并与风车草浮床系统进行了比较.研究结果表明:在8—12月,互叶白千层浮床系统对污水净化能力较强,TN、TP、BOD5、CODCr、NH4-N和NO3-N平均去除率分别为71.39%、83.32%、84.96%、69.91%、72.53%和76.23%,分别为风车草浮床系统的87.55%、95.03%、97.48%、98.24%、88.73%和89.37%;在温度较低的1月,互叶白千层浮床系统对污水净化能力明显下降,TN、TP、BOD5、CODCr、NH4-N和NO3-N去除率分别为29.83%、61.33%、70.53%、49.89%、39.03%和53.84%,分别为风车草浮床系统的38.67%、68.24%、86.77%、77.70%、64.20%和65.87%.

PRELIMINARY SDUDY ON PURIFYING EFFECT OF MELALEUCA ALTERNIFLOLIA GROWN IN FLOATING-BED SYSTEMS TO DOMESTIC WASTEWATER

Melaleuca alternifolia is a fast-growing woody plant and produces tea tree oil, a commodity in demand by the health-care industry. The purifying effect of M. alternifolia grown in floating-bed systems to domestic wastewater was investigated, and compared with the Cyperus alternifolius grown in floating-bed systems. Results indicated that M. alternifolia floating-bed was capable of removing pollutants from domestic sewage. M. alternifolia floating-bed maintained high purifying effect from August to December, average removal rates of TN, TP, BOD5, CODCr, NH4-N and NO3-N were 71.39%, 83.32%, 84.96%, 69.91%, 72.53% and 76.23%, and accounted for 87.55%, 95.03%, 97.48%, 98.24%, 88.73% and 89.37% of removal rates for C. alternifolius floating-bed, respectively. However, M. alternifolia had low purifying effect in January, removal rates of TN, TP, BOD5, CODCr, NH4-N and NO3-N were 29.83%, 61.33%,70.53%, 49.89%, 39.03% and 53.84%, and accounted for 38.67%, 68.24%, 86.77%, 77.70%, 64.20% and 65.87% of removal rates for C. alternifolius floating-bed, respectively.