State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China.
Chemosphere. 2013 Apr;91(5):635-40. doi: 10.1016/j.chemosphere.2012.12.071. Epub 2013 Feb 11.
The production of volatile fatty acids (VFAs) from primary sludge and the subsequent application to improve biological nutrient removal has drawn much attention. In this study, a novel approach of using primary sludge as an additional carbon source was conducted in batch tests. The nitritation effluent was directly injected into the sludge fermentation reactor to achieve nitrogen removal. Complete denitrification could be realized in the combined reactor. Moreover, injecting nitrite not only promoted the sludge stabilization process, but also reduced the release of phosphate and ammonium during sludge stabilization. The novel process was further evaluated in a continuous system by treating sludge dewatering liquors. Under optimum conditions, 85% removal of ammonium and 75% of total nitrogen could be obtained using primary sludge, resulting in the suitable effluent for recycling into the inlet of the wastewater treatment plant.
利用初沉污泥生产挥发性脂肪酸（VFAs）并将其应用于改善生物脱氮除磷已引起广泛关注。本研究采用初沉污泥作为外加碳源的新工艺，在批式试验中进行了研究。将亚硝化出水直接注入污泥发酵罐，实现了脱氮。在组合式反应器中可实现完全反硝化。此外，投加亚硝酸盐不仅促进了污泥稳定化过程，而且减少了污泥稳定化过程中磷和氨的释放。通过处理污泥脱水液，在连续系统中进一步评估了新工艺。在最佳条件下，采用初沉污泥可实现 85%的氨氮去除率和 75%的总氮去除率，出水可适用于回用于污水处理厂的进水。
