Scion, Te Papa Tipu Innovation Park, 49 Sala Street, Rotorua 3010, New Zealand.
Bioresour Technol. 2013 Nov;148:605-10. doi: 10.1016/j.biortech.2013.08.160. Epub 2013 Sep 6.
Individual and interactive effects of process variables on the degradation of fermented municipal sludge were examined during wet oxidation. The process was carried out at 220-240°C using 1:1-2:1 oxygen to biomass ratio and 300-500 rpm stirring speed. Response surface methodology coupled with a faced-centred central composite design was used to evaluate the effect of these variables on total suspended solids, volatile suspended solids and total chemical oxygen demand. Multivariate analysis was conducted for the initial and near completion stages of reaction: 5 and 60 min treatments, respectively. Temperature had the most significant effect on degradation rate throughout. During the initial stage the effect of mixing intensity was less significant than that of oxygen ratio. Mixing intensity did not influence degradation rate at the later stage in the process. During the near completion stage, the interaction of temperature and oxygen ratio had significant effect on sludge degradation.
在湿式氧化过程中，考察了工艺变量对发酵城市污泥降解的单独和交互影响。该过程在 220-240°C 下进行，使用 1:1-2:1 的氧气与生物质比和 300-500 rpm 的搅拌速度。响应面法结合面心中央复合设计用于评估这些变量对总悬浮固体、挥发性悬浮固体和总化学需氧量的影响。对反应的初始和接近完成阶段进行了多元分析：分别为 5 和 60 分钟的处理。温度对整个降解速率的影响最大。在初始阶段，混合强度的影响小于氧气比的影响。在过程的后期，混合强度对降解速率没有影响。在接近完成阶段，温度和氧气比的相互作用对污泥降解有显著影响。
