聚季胺盐投加方式对厌氧污泥颗粒化的影响研究

Effects of Polyquaternary Amine Dosing Patterns on Granulation of Anaerobic Sludge

投加阳离子聚合物是加速厌氧污泥颗粒化的有效方法,根据静态试验得出的聚季胺盐投加总量,选定了聚季胺盐的几种投加方式（不同的投加量和投加时间间隔）,研究其对实验室规模下的厌氧序批式反应器（ASBR）中污泥颗粒化的影响.试验以污水厂的厌氧污泥为对象,以污泥颗粒的粒径、沉速及出水COD等作为评价污泥颗粒化进程的指标,分析了各投加方式对污泥颗粒化进程的影响,并挑选出适宜的絮凝剂投加方式.结果表明,不同投加方式对ASBR污泥颗粒化进程有不同影响,建议采用每次投加量为0.16～0.32 mg/gMLSS,投加时间间隔为2～5 d,分5～10次投加的方式.

Adding cation polymer is an effective way to form anaerobic granular sludge rapidly. Based on the total amount of polyquaternary amine at static state, the polyquaternary amine dosing patterns, which represent different doses and intervals, were analyzed in the granulation in Anaerobic Sequencing Batch Reactors （ ASBR）, which was run at a laboratory scale. The anaerobic sludge in the ASBRs was taken from a wastewater treatment plant. The organic loading rate of each reactor was promoted in a rapid way to perform the selected functions. By comparing the diameter and settling velocity of sludge particles and the COD in effluent from each reactor which matched a single pattern, the effects of patterns were analyzed and hence the more suitable pattern was chosen. As a result, the patterns exert different effects and it is suggested that the polyquaternary amine dose in the ASBR is between 0.16 and 0.32 mg/gMLSS with 5 - 10 times and the interval of 2 - 5 days.