| 热碱处理对污水处理厂污泥特性的影响研究 |
| 摘要点击 3461 全文点击 1659 投稿时间：2014-08-20 修订日期：2014-10-09 |
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| 中文关键词 热碱处理 融胞作用 污水处理厂污泥 污泥浓度 污泥形态 影响 |
| 英文关键词 alkaline thermal treatment disintegration of sludge sludge from sewage treatment plant sludge concentration sludge morphology effect |
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| 中文摘要 |
| 热碱处理是一种重要的污泥预处理方法. 选取污泥浓度、pH、温度和处理时间这4个因素,采用正交试验,研究了这些因素对污水处理厂污泥融胞、污泥浓度及污泥形态等污泥特性的影响,以对污泥热碱处理的条件进行优化. 结果表明,这4个因素对污泥融胞、污泥浓度和污泥形态特征影响的显著性均为:pH>温度>时间>污泥浓度. 此外,这4个因素对释放单位污泥溶解性化学需氧量(SCOD)和减小污泥浓度的最佳组合条件为:污泥浓度36.55 g·L-1、pH 12.45、温度175℃和处理时间60 min,而对减小污泥粒径和分形维数的最佳组合条件为:污泥浓度36.55 g·L-1、pH 12.5、温度175℃和处理时间45 min. |
| 英文摘要 |
| Alkaline thermal treatment is an important pretreatment method for sewage sludge. In this paper, in order to optimize the alkaline thermal treatment conditions for sludge pretreatment, four pretreatment parameters (sludge concentration, pH, temperature and treatment time) were investigated through orthogonal experiments to determine their effects on the sludge disintegration, sludge concentration and sludge morphology of sewage sludge. The experimental results showed that the significance of the four factors on sludge characteristics was in the order of pH>temperature>treatment time>sludge concentration. Additionally, the optimal conditions of the four factors for the release of soluble chemical oxygen demand (SCOD) of unit sludge and decrease of sludge concentration were as follows: 36.55 g·L-1, pH 12.45, 175℃ and 60 min. While the optimal conditions for the decrease of particle size and fractal dimension were 36.55 g·L-1, pH 12.5, 175℃ and 45 min. |
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