Treatment of raw sewage in a temperate climate using a UASB reactor and the hanging sponge cubes process
Treatment of raw sewage in a temperate climate using a UASB reactor and the hanging sponge cubes process
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DOI：
10.1016/s0273-1223(97)00552-0
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发表时间：
1997-01-01
影响因子：
2.7
通讯作者：
Ohashi, A
中科院分区：
文献类型：
--
作者：
Agrawal, LK;Ohashi, Y;Ohashi, A
研究了上流式厌氧污泥毯（UASB）反应器和悬挂海绵立方工艺在温带气候（冬季10-20℃）下对原污水的可处理性。在47.1 L的UASB反应器中，以消化后的污泥为种子，连续运行2年多，投料为原污水，平均COD约为300 mg/L（可溶性41%）。夏季HRT为7 h时，出水COD总量约为70 mg/L，可溶性约为50 mg/L， BOD5总量约为20 mg/L，可溶性约为12 mg/L，冬季处理效率和工艺稳定性均较好。以UASB反应器出水为原料，采用悬挂海绵立方体工艺处理原污水，得到了以下结果：1.9和3.5 g NH4-N.m（-2）的氨氧化速率。在自然进气条件下，下流式悬挂海绵立方生物滤池的D（-1）分别在冬季和夏季获得。采用后反硝化和外部碳源，在厌氧条件下，在13 ~ 30℃的温度范围内，采用上流式悬式海绵床生物反应器，HRT时间小于1小时，平均氮（NO3 + NO2）去除率为84%。整个系统使用一个UASB反应器和悬挂海绵立方体工艺可能是一个相当有吸引力的处理选择。(c) 1997年；Elsevier Science Ltd.出版。
The treatability of raw sewage in a temperate climate (wintertime around 10-20 degrees C) using an upflow anaerobic sludge blanket (UASB) reactor and the hanging sponge cubes process was evaluated. After being seeded with digested sewage sludge, a 47.1 L UASB reactor was continuously operated for more than 2 years by feeding raw sewage, which had average COD around 300 mg/L (41% soluble). During summertime at an HRT of 7 h, effluent COD approximately 70 mg/L total, 50 mg/L soluble and BOD5 20 mg/L total, 12 mg/L soluble was obtained, During wintertime also, treatment efficiency and process stability was good.With the hanging sponge cubes process using the effluent of the UASB reactor treating raw sewage, the following results were obtained. The ammonia oxidation rates of 1.9 and 3.5 g NH4-N.m(-2).d(-1) in a downflow hanging sponge cubes biofilter, under natural air intake only were obtained during wintertime and summertime, respectively. With post-denitrification and an external carbon source, 84% in average N (NO3 + NO2) was removed with an HRT of less than 1 hour and in the temperature range of 13 to 30 degrees C using an upflow submerged hanging sponge bed bioreactor, under anaerobic conditions. The overall system using a UASB reactor and the hanging sponge cubes process could be quite an attractive treatment alternative. (C) 1997 IAWQ. Published by Elsevier Science Ltd.