Application of anaerobic-uf membrane reactor for treatment of a wastewater containing high strength particulate organics
Application of anaerobic-uf membrane reactor for treatment of a wastewater containing high strength particulate organics
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DOI：
10.2166/wst.1994.0630
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发表时间：
1994-12
影响因子：
2.7
通讯作者：
H. Harada;K. Momonoi;S. Yamazaki;S. Takizawa
中科院分区：
文献类型：
--
作者：
H. Harada;K. Momonoi;S. Yamazaki;S. Takizawa
将错流超滤（UF）膜分离技术应用于厌氧工艺处理高浓度颗粒态COD废水。将总浓度为5000 mg COD·1 - 1的合成废水进料至反应器，该合成废水由比例为1：1的可溶性和颗粒COD（纤维素）组成。反应器在两种负荷率下运行190天，即1.5和2.5 kg COD·m-3 ·d-1。超过98%的COD去除率在整个持续时间内始终实现，并且该系统还可能适应更高的负荷。尽管渗透物COD总是保持在低于80 mg COD·1 −1，但反应器培养液的可溶性COD累积高达1200 mg COD·1 −1。生物量浓度在15 000 mg ML VSS·1 −1左右达到饱和。在整个时间段内，纤维素没有在反应器中积累的趋势，其仅构成保留在反应器中的总固体的1-2%。运行40 d后，污泥的产甲烷活性在H2/CO2条件下提高了3.4倍，在乙酸条件下提高了10倍。然而，之后，由于低污泥负荷，进一步培养导致两种基质各自峰值的50%下降。使用纤维素作为测试底物的产甲烷活性也表现出类似的趋势。随着培养时间的延长，膜通量显著下降，这是由于反应器混合液的流变特性发生了变化，不仅MLSS增加，而且可溶性高分子有机物的积累也引起了膜通量的变化。
A cross-flow ultrafiltration (UF) membrane separation was applied to anaerobic process for treatment of a wastewater containing high proportion of particulate COD. A synthetic wastewater with the total strength of 5000 mg COD·1 −1 consisting of soluble and particulate COD (cellulose) in the ratio of 1:1 was fed to the reactor. The reactor was operated for 190 days at two loading rates, i.e. 1.5 and 2.5 kg COD·m −3 ·d −1 . More than 98% of COD removal was consistently achieved throughout the duration, and the system was furthermore likely to accommodate much higher loading. Although the permeate COD was always kept at less than 80 mg COD·1 −1 , soluble COD of reactor broth accumulated up to 1200 mg COD·1 −1 . The biomass concentration saturated around 15 000 mg ML VSS·1 −1 . There was no tendency for cellulose to accumulate in the reactor over the whole period, which constituted only 1-2% of the total solids retained in the reactor. The methanogenic activity of the sludge increased 3.4 times for H 2 /CO 2 and 10 times for acetate after 40 days operation. Afterwards, however, a further cultivation caused declines to 50% of the respective peak values for both substrates, because of a low sludge loading. The methanogenic activity using cellulose as a test substrate also exhibited a similar tendency. The membrane permeate flux deteriorated significantly with the cultivation time, owing to the change in rheological properties of the reactor mixed liquor that had been caused not only by increment of MLSS but also by accumulation of soluble high molecular organics.