LEQUIA, Institute of the Environment, University of Girona, Girona, Catalonia, Spain.
Bioresour Technol. 2013 Feb;129:229-35. doi: 10.1016/j.biortech.2012.11.055. Epub 2012 Nov 27.
This study evaluates the application of an anoxic side-stream reactor in the sludge return line of a conventional activated sludge system for the reduction of biomass production. The oxidation-reduction potential was maintained at -150 mV while the applied sludge loading rate was modified by changing the percentage of return sludge treated in this reactor. The observed yield from the conventional system (0.513 kg VSS kg(-1) COD) was continuously reduced when the portion of return sludge treated was increased. A maximum reduction of 18.3% of the observed yield was obtained treating the whole sludge return line. The sludge age maintained through the experiment. The organic matter removal was not deteriorated, even improved, by the proposed plant modification. Thus, simply applying an anoxic side-stream reactor would decrease the final volume of waste sludge while maintaining the sludge retention time and would, in fact, decrease the economic costs in terms of sludge handling.
本研究评估了缺氧侧流反应器在传统活性污泥系统污泥回流管中的应用，以减少生物量的产生。氧化还原电位维持在-150 mV，而通过改变在该反应器中处理的回流污泥的百分比来调整应用的污泥负荷率。当处理的回流污泥比例增加时，常规系统（0.513 kg VSS kg(-1) COD）的观察产率持续降低。当处理整个污泥回流线时，观察产率最大降低了 18.3%。通过实验维持了污泥龄。即使通过提出的工厂改造，有机物去除也没有恶化，反而得到了改善。因此，只需应用缺氧侧流反应器就可以在保持污泥停留时间的同时减少最终的剩余污泥量，并且实际上可以降低污泥处理方面的经济成本。
