Al-Mutairi Nayef Z
Civil Engineering Department, Kuwait University, Safat, Kuwait.
Bioresour Technol. 2009 Jan;100(1):50-8. doi: 10.1016/j.biortech.2007.12.030. Epub 2008 Jul 15.
Filamentous bulking at a slaughterhouse activated sludge treatment plant significantly reduced mixed liquor settling properties, which caused many operational problems and worsening in effluent quality. The main cause of this condition was attributed to significant levels of influent readily biodegradable COD, which was present primarily in the form of organic acids. An aerobic selector was chosen to eradicate the usual bulking incidents of slaughterhouse wastewater treatment plants. Other plant enhancements included increased aeration batch reactor volume, and provision of step feed capability. Comparison of data before and after aerobic selector installation showed a significant improvement in mixed liquor settleability, which eradicated the need for chemicals that had been used to control filaments and to control effluent solids loss. The additional volume of the aeration and chemicals eliminations from the activated sludge system also served to eliminate aquatic toxicity in the treated effluent.
一家屠宰场活性污泥处理厂出现的丝状菌膨胀显著降低了混合液的沉降性能，引发了诸多运行问题并导致出水水质恶化。这种情况的主要原因是进水易生物降解化学需氧量含量过高，其主要以有机酸的形式存在。选用了一个好氧选择器来消除屠宰场废水处理厂常见的膨胀事故。该厂的其他改进措施包括增加曝气间歇式反应器的容积以及具备阶梯式进水能力。安装好氧选择器前后的数据对比显示，混合液沉降性能有了显著改善，从而不再需要使用用于控制丝状菌和控制出水固体流失的化学药剂。活性污泥系统中曝气容积的增加以及化学药剂的停用还有助于消除处理后出水中的水生毒性。
