【摘要】 研究了膜 生物硝化反应器对含氨废水的处理效能以及分离膜的截留和渗透效能。膜_生物反应器启动迅速 ,在水力停留时间为 1d的情况下 ,反应器最高进水浓度达 80mmol(NH4+ _N)·L- 1 ,最高容积负荷达 1 12kg(NH4+ _N)·m- 3·d- 1 ,氨氮去除率保持在 95 %以上。试验证明 ,分离膜对微生物有良好的截留作用 ,5 0天内反应器的污泥浓度从 5g·L- 1 增长到 10g·L- 1 ,分离膜表面附着的生物层则对废水氨氮和亚硝氮有进一步的转化作用。在液位差低于 80cm时 ,提高液位差可增大膜渗透通量 ;液位差超过 80cm后 ,增大液位差的膜渗透通量效应很小 ;其中 ,当液位差为 2 0cm左右时 ,膜通量达 2 . 5 1L·m- 2 ·h- 1 ,阻力最小 [(2 . 6 3× 10 - 5)m- 1 ]。该膜_生物硝化反应器可依靠液位差压力驱动出水 ,无需外加动力。更多还原

【Abstract】 The operation performance of membrane nitrification biore actor to treat ammonia-containing wastewater as well as the capabilities of sepa ration and filtration of polypropylene membrane modules were tested. The removal efficiency of ammonia was kept higher than 95% when the hydraulic retention tim e was set at 1 day, the influent concentration was increased up to 80mmol (NH + 4-N)·L -1 and the volume loading rate was increased up to 1.12 kg(NH 4+-N)·m -3·d -1. The biomass in the reactor was accu mulated f rom 5 g·L -1 to 10 g·L -1 within 50 days, which indicated that polyp ropylene membrane modules were efficient in retaining biomass. The biomass attac hed to the membrane also contributed to the conversion of ammonia and nitrite. W hen the hydraulic pressure was lower than 80cm, the increase of hydraulic pressu re improved the permeation of membrane. However, when the hydraulic pressure was beyond 80cm, the increase of hydraulic pressure did not significantly improve t he permeation of membrane. The permeate flux was the highest 2.51 (L·m -2 ·h -1) but the resistance was the lowest (2.63×10 -5) m -1 whe n the hydraulic pressure was about 20 cm. The results showed that the membrane n itrification bioreactor could be run normally without extra energy input.更多还原