混凝法预处理海产品加工废水研究.docVIP

混凝法预处理海产品加工废水的研究 谢宇恒1 李常芳2 刘亮2 杜豪2 青岛第五十八中学，2.青岛理工大学环境学院） Pretreatment of Aquatic Product Processing Wastewater by Coagulation Process Xie Yu-heng1 Li Chang-fang2 LiuLiang2 DuHao2 (1.Qingdao fifty-eighth middle school 2,School of Environmental and Municipal Engineering，Qingdao Technological University) 摘要 以海产品加工废水为研究对象，研究了混凝法对该废水的预处理效果。研究结果表明，混凝预处理对海产品加工废水的COD和氨氮去除作用明显，FeCl3的去除效果优于PAC，在FeCl3投加量为210mg/L时，废水中的COD降低为530mg/L，去除率约59%，氨氮的去除率为35.2%；从混凝前后水样的水解酸化试验可知，混凝对该类废水水解酸化处理过程中氨氮的升高具有较好的控制作用，其中FeCl3的控制效果优于PAC，FeCl3投加量为180mg/L时，水解酸化过程氨氮的释放率量为20.35mg/L，可比原水的释放量降低72%，投加同浓度的PAC水解酸化时氨氮的释放量为28.9mg/L,比原水的释放量降低42%。 关键词：海产品加工废水；混凝；水解酸化；氨氮；总氮 Abstract:It describes the coagulation - hydrolysis (acidification) of the wastewater treatment effect based on aquatic products processing wastewater .Results showed that the removal effect which coagulation pretreat the COD and ammonia of aquatic products processing wastewater.The removal of FeCl3 is better than PAC,:when the dosage of FeCl3 reached 210mg/L,the COD of wastewater reduced to530mg / L.reduced by 59%.The removal of ammonia efficiency was 35.2%.Hydrolysis acidification leads to lower total nitrogen,and ammonia content increased .Total nitrogen content of.coagulation water is significantly lower than the coagulation of raw water.The removal of FeCl3 is better than PAC.when the dosage of FeCl3 reached 180mg/L,TN of raw water is reduced to94mg/L.In the process of hydrolysis acidification ,the coagulation water of this dosage which the ammonia emissions is less than ammonia release of raw water and same dosing PAC concentration. Key words: aquatic products processing wastewater; coagulation/hydrolysis (acidification) ; ammonia; TN 随着海产品消费量的提高，海产品加工废水也日益增加。海产品加工废水以脂类和蛋白质等有机污染物为主[1-2]，该类废水初始氨氮浓度较低，约30mg/L左右，但在实际污水处理工程中，该类废水经过生化处理氨氮浓度往往不降反升，给海产品加工企业的废水处理带来了极大的困扰。关于海产品加工废水处理的研究，目前主要集中在生化处理上，对采用混凝法作为预处理工艺，解决生化过程中氨氮不降反升问题的研究较少。例如刘志强，毛友同研究了水力停留时间（HRT）、温度和溶解氧三个因素对混凝/水解酸化/接触氧化处理海产品加工废水的影响，通过正交试验确定最优状况[3]，未指出混凝作用对后续水解酸化以及接触氧化工艺的