Optimal process configuration for anaerobic digestion with ozonation.
Optimal process configuration for anaerobic digestion with ozonation.
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臭氧化厌氧消化的最佳工艺配置。
DOI：
10.2166/wst.2003.0228
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
T. Noike
中科院分区：
文献类型：
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作者：
Rajeev Goel;T. Tokutomi;H. Yasui;T. Noike
在严格的污泥处置标准下，经济的剩余污泥减量化是解决污泥处置问题的一个有吸引力的选择。本文介绍了联合收割机氧化臭氧处理与污泥厌氧消化相结合的两种不同工艺配置的长期运行结果。在第一种配置中，臭氧预处理与恒化器厌氧消化相结合，而在第二种配置中，臭氧预/后处理与在没有固体去除的情况下操作的厌氧消化器相结合。根据恒化器实验结果，在0.015和0.05 gO 3/gTS臭氧剂量下，臭氧预处理分别溶解了约19%和37%的固体。臭氧预处理提高了TVS还原效率，降解效率取决于臭氧投加量和系统泥龄。在臭氧剂量为0.05 gO 3/gTS的预臭氧化污泥的TVS降解效率为59%，相比之下，31%的控制反应器与未臭氧化污泥进料。第二种配置的测试结果表明，总的TVS去除效率与后臭氧化的工艺方案可以提高到85%，最小臭氧剂量为0.045克臭氧3/克TVS进料。然而，由于在该配置中没有固体（除了用于取样的固体）被取出，在拟稳态下，反应器中累积的总固体增加到28 g/l至30 g/l。观察到平均比甲烷回收率为0.36 lCH_4/gTVS进料，略低于理论预期。根据实验结果，讨论了工艺配置选择的要点。
Economical source minimization of excess sludge production is an attractive option to deal with the problem of sludge disposal under strict disposal standards. In this paper long-term operational results for two different process configurations that combine oxidative ozone treatment with anaerobic sludge digestion are described. In the first configuration ozone pretreatment was combined with chemostat anaerobic digestion while in the second configuration ozone pre/post-treatments were combined with an anaerobic digester operated without solid removal. From the results of chemostat experiments, the ozone pretreatment solubilized around 19% and 37% of the solids at 0.015 and 0.05 gO3/gTS ozone dose respectively. The ozone pretreatment resulted in improved TVS reduction efficiencies and the degradation efficiencies were observed to depend on the applied ozone dose and system SRT. The TVS degradation efficiency for pre-ozonated sludge at an ozone dose of 0.05 gO3/gTS was 59% as compared to 31% for the control reactor fed with un-ozonated sludge. Test results with the second configuration indicated that overall TVS removal efficiencies for a process scheme with post-ozonation could be improved up to 85% with a minimum ozone dose of 0.045 gO3/gTVS-fed. However, since no solids (except that for sampling) were withdrawn in this configuration, the accumulated total solids in the reactors increased to 28 g/l to 30 g/l at pseudosteady state. The average specific methane recoveries were observed to be 0.36 lCH4/gTVS fed which were slightly lower than theoretically expected. Based on the experimental results, important points in the choice of process configuration are discussed.