不同温度和固体停留时间下废活性污泥的厌氧稳定化：通过污泥减量、溶解性化学需氧量释放和脱水能力进行评估。
Anaerobic stabilization of waste activated sludge at different temperatures and solid retention times: Evaluation by sludge reduction, soluble chemical oxygen demand release and dehydration capability.
机构信息
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
出版信息
Bioresour Technol. 2017 Mar;227:398-403. doi: 10.1016/j.biortech.2016.12.069. Epub 2016 Dec 23.
Anaerobic treatment is the most widely used method of waste activated sludge (WAS) stabilization. Using a semi-continuous stirring tank with condensed WAS, we investigated effects of decreasing the solid retention time (SRT) from 32days to 6.4days on sludge reduction, soluble chemical oxygen demand (SCOD) release and dehydration capability, along with anaerobic digestion operated at medium temperature (MT-AD) or anaerobic digestion operated at room temperature (RT-AD). Results showed that effects of temperature on SCOD release were greater at SRT of 32d and 6.4d. When SRT was less than 8d, total solids (TS), volatile solids (VS) and capillary suction time (CST) did not change significantly. CST was lowest at SRT of 10.7days, indicating best condition for sludge dehydration. Principal component analysis (PCA) showed that the most optimum SRT was higher than 10.7d both in MT-AD or RT-AD.
厌氧处理是最广泛使用的方法，用于稳定废活性污泥（WAS）。使用带有浓缩 WAS 的半连续搅拌罐，我们研究了从 32 天减少到 6.4 天的固体停留时间（SRT）对污泥减少、可溶性化学需氧量（SCOD）释放和脱水能力的影响，以及中温（MT-AD）或室温（RT-AD）下的厌氧消化。结果表明，温度对 SCOD 释放的影响在 SRT 为 32d 和 6.4d 时更大。当 SRT 小于 8d 时，总固体（TS）、挥发性固体（VS）和毛细抽吸时间（CST）没有明显变化。在 SRT 为 10.7 天时 CST 最低，表明污泥脱水的最佳条件。主成分分析（PCA）表明，在 MT-AD 或 RT-AD 中，最适 SRT 均高于 10.7d。
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