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首页> 外文会议>International Water Association(IWA) Conference; 20050518-20; Xi'an(CN) >Effect of temperature and SRT on thermophilic aerobic digestion
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Effect of temperature and SRT on thermophilic aerobic digestion

机译：温度和SRT对嗜好氧消化的影响

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摘要

In order to find the optimal SRT and temperature for TAD, Aerobic thermophilic stabilization and degradation of waste activated sludge from wastewater treatment plant was studied. The experimental was divided into two parts. In first, Batch experiments were performed at temperatures of 40, 45, 50 and 55℃. The most beneficial temperature for aerobic digestion of waste activated sludge was found to be 55℃. Semi-continuous feed reactor was used to study the effect of SRT in the second part of experiments. Temperature was maintained at 55℃, and SRT were set to 4,8,12 days in turn. The average VSS destruction efficiency was 36.8%, 46.7% and 47.1%, respectively. VSS destruction rate increases as the SRT was increased, but No significant difference between 8 days and 12 days. Higher pH, alkalinity and ammonia concentration was found in TAD reactor mainly because of the nitrification inhibition at high temperature. Alkalinity and ammonia concentration generally increased at longer SRTs.
机译：为了找到TAD的最佳SRT和温度，研究了废水处理厂产生的活性污泥的好氧嗜热稳定和降解。实验分为两部分。首先，在40、45、50和55℃的温度下进行批处理实验。有氧消化废活性污泥的最有利温度为55℃。在实验的第二部分中，使用半连续进料反应器研究了SRT的影响。温度保持在55℃，SRT依次设置为4,8,12天。 VSS的平均破坏效率分别为36.8％，46.7％和47.1％。 VSS破坏率随SRT的增加而增加，但在8天和12天之间没有显着差异。在TAD反应器中发现较高的pH，碱度和氨浓度，主要是由于高温下的硝化抑制作用。较长的SRT时，碱度和氨浓度通常会增加。

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