| pH对剩余污泥厌氧发酵产生的COD、磷及氨氮的影响 |
| 摘要点击 2462 全文点击 1093 投稿时间：2005-07-07 修订日期：2005-09-14 |
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| 中文关键词 剩余污泥 厌氧发酵 pH调节 |
| 英文关键词 excess sludge anaerobic fermentation pH controlled |
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| 中文摘要 |
| 城市污水处理厂产生的污泥按照来源的不同可以分为初沉污泥和剩余污泥,通过采用控制pH值的方法,在20～22℃条件下,研究了剩余污泥在不同pH条件下厌氧发酵的情况.结果表明:将剩余污泥的pH值控制为8.0～10.0,在20d的厌氧发酵时间内,溶出的COD(SCOD)要大于pH为5.0～7.0,特别是pH=10.0和pH=11.0时的SCOD值是pH=6.0时的10倍左右,并且第8d产生的挥发性脂肪酸(VFA)也为碱性条件大于酸性条件;但酸性条件下溶出的磷及氨氮大于碱性条件. |
| 英文摘要 |
| There are mainly two kinds of sludge in the municipal wastewater treatment plant,i.e.,primary and secondary sludge.This study investigated the effect of pH,ranging from 4.0～11.0,on hydrolysis in terms of soluble chemical oxygen demand(SCOD) production in the anaerobic solubilization of excess activated sludge at 20～22℃.It was found that when the value of pH was 8.0～10.0,the production quantity of SCOD were higher than pH=5.0～7.0.Especially when the pH was 10.0 or 11.0,the value of SCOD was almost 10 times of pH=6.0 during the whole fermentation of 20 days.And volatile fatty acids(VFA) production on the 8th day under alkaline condition was higher than that under acidic condition. |
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