Application of struvite precipitation coupled with biological treatment to slaughterhouse wastewaters
Application of struvite precipitation coupled with biological treatment to slaughterhouse wastewaters
复制标题
鸟粪石沉淀联合生物处理在屠宰废水中的应用
DOI：
10.1080/09593330903136856
复制
发表时间：
2009
影响因子：
2.8
通讯作者：
P. Özcan
中科院分区：
文献类型：
--
作者：
I. Kabdaşlı;O. Tünay;P. Özcan
在这项研究中，鸟粪石沉淀结合活性污泥法应用于屠宰废水。在0.06-0.42 g COD（g MLVSS）−1d−1的宽有机负荷范围内评估废水的生物可处理性特征，以评估COD去除以及硝化程度。原废水的生物处理结果表明，COD去除率在88%和99%之间变化，在0.1 g COD（g MLVSS）−1d−1和较低的有机负荷下实现完全硝化。鸟粪石沉淀样品的生物处理不需要硝化，在有机物去除0.3 g COD（g MLVSS）−1d−1时，COD去除率为86%。原始和生物处理的废水的鸟粪石沉淀是在有效的化学计量的镁和磷酸盐剂量的氨和pH值为9.0和9.5之间，提供20-30 mg N L-1的氨浓度在流出物中，是独立的初始浓度。在生物处理之前和之后均应用鸟粪石沉淀导致类似的出水质量，并且提供了具有高速率活性污泥系统而不是具有硝化-反硝化的低有机负荷系统的额外益处。鸟粪石沉淀的另一个好处是产生污泥，污泥具有作为肥料的回收潜力。在测试的处理方案中，鸟粪石沉淀后的生物处理似乎在工艺稳定性方面更有利。
In this study, struvite precipitation coupled with an activated sludge process was applied to slaughterhouse wastewaters. Biological treatability characteristics of the wastewater were evaluated in a wide organic loading range of 0.06–0.42 g COD (g MLVSS)−1d−1 to assess COD removal as well as the extent of nitrification. Results of biological treatment of raw wastewater indicated that COD removal varied between 88% and 99% and complete nitrification was achieved at 0.1 g COD (g MLVSS)−1d−1 and lower organic loadings. Biological treatment of the struvite‐precipitated sample, which required no nitrification, yielded 86% COD removal at the organic removal of 0.3 g COD (g MLVSS)−1d−1. Struvite precipitation of both raw and biologically treated wastewater was at effective stoichiometric magnesium and phosphate doses to ammonia and between pH values of 9.0 and 9.5, providing ammonia concentrations of 20–30 mg N L−1 in the effluent and being independent of initial concentrations. The application of struvite precipitation both prior to and after biological treatment resulted in similar effluent qualities and provided the additional benefit of having a high‐rate activated sludge system instead of a low organic loading system with nitrification–denitrification. An additional benefit of struvite precipitation was the production of sludge which had recovery potential as a fertilizer. Among the tested treatment schemes, biological treatment following struvite precipitation seemed to be more advantageous in terms of process stability.