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外循环UASB处理太湖富藻水运行特性研究
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Study on Performance of External Circulation UASB Reactor Treating Algae-laden Water from Taihu Lake
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    摘要:

    针对太湖富藻水高有机物浓度特点,研究外循环升流式厌氧污泥床(UASB)反应器处理太湖富藻水的效能和运行效果.研究表明,以城市污水处理厂活性污泥为种泥,自然腐熟5~7 d左右的太湖富藻水为原水,进水COD为1 050~2 000 mg/L,水力停留时间(HRT)为 5 d ,(32±1) ℃温度等条件下,可以在32 d内成功启动外循环UASB反应器并达到初步稳定运行.通过降低HRT,分阶段提高COD质量浓度的方法,逐步将外循环UASB处理太湖富藻水的有机负荷提高到3 kg COD/(m3·d),其COD去除率可以稳定在75%左右,产气率为0.75 L/(L·d),外循环UASB对太湖富藻水具有良好的处理效果.通过电镜观测,发现稳定运行期形成颗粒污泥,且污泥内生物相丰富,分别为丝状菌、杆状菌和球状菌等多种微生物共营生长.

    Abstract:

    The efficiency and performing of external circulation up-flow anaerobic sludge blanket reactor (UASB) in dealing with algae-laden water from Taihu Lake was studied for the high organic matter concentration of algae-laden water. The test results showed that, using naturally decomposed algae-laden water for about 5~7 d as influent , the external circulation UASB could be completely started and remained stable, when the reactor ,which was inoculated sludge from municipal sewage treatment plant ,was operated at HRT of 5 d,temperature of (32 ±1) ℃. Based on declining HRT, increasing COD concentration phasedly, the organic load of the algae-laden water was increased to 3 kgCOD/(m3·d), with a stable COD removal of 75% and a gas production rate of 0.75 L/(L·d), indicating the stability and performance of the external circulation UASB treating the water. Observed by SEM, the granular sludge was found in the stabilization stage with coupled growing micro-organisms such as filamentous bacteria, rod-shaped bacteria, and spherical bacteria.

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余亚琴,吕锡武,吴义锋.外循环UASB处理太湖富藻水运行特性研究[J].湖南大学学报:自然科学版,2013,40(1):87~92

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