Anaerobic digestion of excess activated sludge with ozone pretreatment.
Anaerobic digestion of excess activated sludge with ozone pretreatment.
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臭氧预处理对剩余活性污泥进行厌氧消化。
DOI：
10.2166/wst.2003.0648
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
H. Yasui
中科院分区：
文献类型：
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作者：
R Goel;T. Tokutomi;H. Yasui
在严格的污泥处置标准下，通过经济手段使剩余污泥的产生量最小化，可以被认为是一种有吸引力的选择。本文介绍了臭氧氧化预处理与污泥厌氧消化相结合工艺的长期运行结果。臭氧预处理溶解约19%和37%的固体在0.015和0.05 gO 3/gTS臭氧剂量。污泥浓度在1.8- 2.6%范围内，臭氧氧化过程中的溶解率没有显示出任何显着差异。臭氧处理后的TVS浓度被观察到比进料污泥浓度低约3%，这表明在臭氧化过程中仅部分矿化。臭氧预处理提高了厌氧消化过程中的固体还原效率，从而提高了甲烷回收率。在厌氧消化过程中的TVS去除效率被观察到增加最大的35-90%，这取决于臭氧预处理过程中所施加的臭氧剂量。在不同的臭氧剂量的TVS降解效率的改善相关以及在臭氧化过程中的溶解程度。长期数据还表明，生物量驯化臭氧污泥之前，可以实现更高的降解效率是必要的。
Source minimization of excess sludge production by economical means can be considered an attractive option to deal with the problem of sludge disposal under strict disposal standards. In this paper long-term operational results for a process that combines the oxidative ozone pretreatment with anaerobic sludge digestion are described. The ozone pretreatment solubilized around 19% and 37% of the solids at 0.015 and 0.05 gO3/gTS ozone dose. The solubilization ratios during ozonation did not show any significant difference for the sludge concentrations ranging from 1.8-2.6%. The TVS concentrations after ozone treatment were observed to be about 3% lower than the feed sludge concentrations suggesting only partial mineralization during ozonation. The ozone pretreatment resulted in improved solid reduction efficiencies during anaerobic digestion leading to higher methane recovery. The TVS removal efficiencies during anaerobic digestion were observed to increase by a maximum of 35-90% depending on the applied ozone dose during ozone pretreatment. The improvement in TVS degradation efficiency at different applied ozone doses correlated well with the extent of solubilization during ozonation. Long-term data also suggested that biomass acclimation to ozonated sludge was necessary before higher degradation efficiencies could be achieved.