Sievers M, Ried A, Koll R
CUTEC-Institut GmbH (Clausthal Environment Technology Institute), Leibnizstr. 21+23, 38678 Clausthal-Zellerfeld, Germany.
Water Sci Technol. 2004;49(4):247-53.
Ozonation of industrial and sewage sludge is a suitable process for minimizing the sludge production of activated sludge processes. The ozonation has the advantage for complete oxidation of volatile suspended solids (VSS) of combining partial sludge oxidation with subsequent biological oxidation. This paper describes the evaluation of two full-scale sewage sludge ozonation investigations for subsequent aerobic stabilisation as well as for subsequent anaerobic stabilisation compared to different sludge treatment processes. For both the anaerobic and aerobic application, sludge liquefying by release of 110 and 160 mg COD per g total suspended solids (TSS) has been reached at specific ozone consumption of 0.03 and 0.06 kg O3 per kg TSS, respectively. The subsequent biological treatment has reached a mass reduction of 20-35% for the aerobic and 19% for the anaerobic stabilisation. For both applications the specific ozone consumption was about 0.05 kgO3 per kg TSS to be treated. A comparison with mechanical and thermo-chemical sludge mass reduction methods shows that the mass reduction potential of ozonation is presently higher. Even though costs for sludge ozonation are higher compared to other methods, the optimisation potential for cost reduction of sludge ozonation is obvious from the results presented in this paper.
对工业污泥和污水污泥进行臭氧化处理是一种可减少活性污泥法污泥产量的合适工艺。臭氧化处理具有将部分污泥氧化与后续生物氧化相结合，从而完全氧化挥发性悬浮固体（VSS）的优势。本文介绍了两项全规模污水污泥臭氧化处理研究的评估情况，将其后续的好氧稳定化和厌氧稳定化与不同的污泥处理工艺进行了比较。对于厌氧和好氧应用，分别在每克总悬浮固体（TSS）消耗0.03和0.06千克臭氧的特定臭氧消耗量下，实现了每克总悬浮固体释放110和160毫克化学需氧量（COD）的污泥液化。后续的生物处理在好氧稳定化中实现了20 - 35%的质量减少，在厌氧稳定化中实现了19%的质量减少。对于这两种应用，待处理的每千克总悬浮固体的特定臭氧消耗量约为0.05千克臭氧。与机械和热化学污泥减量方法的比较表明，目前臭氧化处理的减量潜力更高。尽管污泥臭氧化处理的成本高于其他方法，但从本文给出的结果来看，污泥臭氧化处理成本降低的优化潜力是明显的。
