Hitachi Plant Technologies Ltd., 5-2 Higashi-Ikebukuro 4-Chome, Toshima-ku, Tokyo 170-8466, Japan.
Bioresour Technol. 2011 Sep;102(17):7641-4. doi: 10.1016/j.biortech.2011.05.030. Epub 2011 May 19.
In order to reduce the discharge of residual sludge from an anaerobic digester, pre-treatment methods including low-pressure wet-oxidation, Fenton oxidation, alkali treatment, ozone oxidation, mechanical destruction and enzymatic treatment were evaluated and compared. VSS removal efficiencies of greater than 50% were achieved in cases of low-pressure wet-oxidation, Fenton oxidation and alkali treatment. Residual sludge from an anaerobic digester was pre-treated and subjected to thermophilic anaerobic digestion. As a result, the process of low-pressure wet-oxidation followed by anaerobic digestion achieved the highest VSS removal efficiency of 83%. The total efficiency of VSS removal of sewage sludge consisting of primary and surplus sludge would be approximately 92%, assuming that the VSS removal efficiency of sewage sludge is 50% in the anaerobic digester of the sewage treatment plant.
为了减少厌氧消化器中剩余污泥的排放，评估并比较了包括低压湿式氧化、芬顿氧化、碱处理、臭氧氧化、机械破坏和酶处理在内的预处理方法。在低压湿式氧化、芬顿氧化和碱处理的情况下，VSS 的去除效率超过了 50%。对厌氧消化器中的剩余污泥进行预处理，然后进行高温厌氧消化。结果表明，在经过低压湿式氧化和厌氧消化处理后，VSS 的去除效率最高，达到 83%。假设污水处理厂的厌氧消化器中污水污泥的 VSS 去除效率为 50%，则由初沉污泥和剩余污泥组成的污水污泥的总 VSS 去除效率约为 92%。
