生物填料在重污染河道治理中的应用研究

Porous stuffing material for biofilm treatment of highly polluted urban river way

将生物填料应用于城市重污染河道治理，研究了随时间的推移，填料垂直方向上生物膜的膜量、膜组成、膜活性变化规律以及生物填料对水质的改善效果。试验结果表明，该生物填料生物膜活性以比基质耗氧速率表示为0．153～0．174mg／（g·h）。在挂膜进行到第40天、悬挂密度为24根／m^2时，对水质改善达到最佳效果，对TN、TP、COD、Chla、浊度的去除率分别为53％、35％、50％、5％、44％。

Spherical elastic porous stuffing material （ZH901, 140 mm in diameter, 300 m^2/m^3） was employed for biofilm treatment of a highly polluted urban river way in Suzhou, Jiangsu. The experimental program involved 6 test areas （4 m×2 m×1 m） ; five areas were packed with 3-48 stuffing units/m^2. Biomass and composition and activity of the biofilm samples taken from 3 vertical positions （top, middle and bottom） of the packed section were monitored for 50 days. SOUR was 0. 153-0. 174 mg O2/（g· h）. The best treatment performance was obtained in the test area packed with 24 stuffing units/m^2 after 40 days; the removal rates for TN, TP, COD, Chla and turbidity were 53%, 35%, 50%, 5% and 44%, respectively. Algal growth was not affected by the biofilm treatment.