Chen Guang-Hao, An Kyoung-Jin, Saby Sébastien, Brois Etienne, Djafer Malik
Department of Civil Engineering, Hong Kong University of Science & Technology, Clear Water Bay Road, Kowloon, Hong Kong, People's Republic of China.
Water Res. 2003 Sep;37(16):3855-66. doi: 10.1016/S0043-1354(03)00331-2.
Modification of a conventional activated sludge process by inserting a sludge holding tank in a sludge return line forms an oxic-settling-anaerobic (OSA) process that may provide a cost-effective way to reduce excess sludge production in activated sludge processes. In this paper we systematically evaluate the following possible scenarios that may explain the reduction of excess sludge in the OSA process: (i). energy uncoupling, (ii). domination of slow growers, (iii). soluble microbial products (SMPs) effect and (iv). sludge decay in the sludge holding tank under a low oxidation-reduction potential (ORP) condition. Results show that only the final scenario may reasonably explain this reduction. It has also been found that the sludge decay process in the sludge holding tank may involve the reduction of the cell mass.
通过在污泥回流管线中插入一个污泥储存池来改造传统活性污泥工艺，形成了一种好氧-沉淀-厌氧（OSA）工艺，该工艺可能为减少活性污泥工艺中剩余污泥产量提供一种经济有效的方法。在本文中，我们系统地评估了以下几种可能解释OSA工艺中剩余污泥减少的情况：（i）能量解偶联；（ii）缓慢生长菌占主导；（iii）可溶性微生物产物（SMPs）效应；以及（iv）在低氧化还原电位（ORP）条件下污泥储存池中的污泥衰减。结果表明，只有最后一种情况可以合理地解释这种减少。还发现污泥储存池中的污泥衰减过程可能涉及细胞质量的减少。
