LINLifeng.Research on the Application of High?speed Ion Air Flotation for Slaughtering and Meat Processing Wastewater Pretreatment[J].China Water & Wastewater,2026,42(12):86-91.
高速离子气浮预处理屠宰和肉类加工废水应用研究
- Title:
- Research on the Application of High?speed Ion Air Flotation for Slaughtering and Meat Processing Wastewater Pretreatment
- Keywords:
- upgrading and renovation; high-speed ion air flotation; slaughtering and meat processing wastewater; pretreatment process optimization
- 摘要:
- 屠宰和肉类加工废水TN、SS与油类含量较高，一般采用气浮作为预处理。常规溶气气浮在此类高浓度废水预处理中常需提高回流比以强化处理效果，导致能耗与运行成本升高，且难以满足稳定性与负荷削减的要求。某工业园区新建屠宰和肉类加工废水处理厂选用高速离子气浮工艺，通过中试并结合实际工程运行情况，分析了高速离子气浮和常规溶气气浮对屠宰和肉类加工废水的预处理效果。中试结果表明，高速离子气浮工艺出水水质优于常规溶气气浮，对COD、TN、NH4+-N、TP、SS和油类的平均去除率分别为（72.6±9.5）%、（56.1±14.4）%、（35.3±7.9）%、（96.7±0.1）%、（95.7±1.7）%和（99.6±0.5）%。高速离子气浮的高溶气效率（98.7%）和产生的带电荷微纳米气泡可有效增强对TN、NH4+-N、COD、SS和油类的去除效果，平均TN和NH4+-N去除率分别为常规溶气气浮的3.6和3.5倍，有利于后续生化系统的稳定运行。在3.5万m3/d屠宰和肉类加工废水处理厂实际工程运行中，高速离子气浮的运行成本为2.67元/ m3，仅为常规溶气气浮的84.2%，在满足预处理目标的同时具备较好的成本优势。
- Abstract:
- Slaughtering and meat processing wastewater typically contains elevated TN, SS, and oils, while air flotation is always used for pretreatment. For such high-strength influents, conventional dissolved air flotation often relies on increased recycle ratios to intensify treatment, which raises energy consumption and operating costs while making it difficult to satisfy the stability and load-reduction requirements. Against this backdrop, a newly constructed wastewater treatment plant for slaughtering and meat processing wastewater treatment in an industrial park adopted a high-speed ion air flotation process. The pretreatment effect of high-speed ion air flotation and the original conventional dissolved air flotation on slaughtering and meat processing wastewater were compared through a pilot-scale experiment combined with a full-scale engineering. The high-speed ion air flotation has high pollutants removal efficiency for slaughtering and meat processing wastewater, and the average removal efficiency of COD, TN, NH4+-N, TP, SS, and oil were (72.6±9.5)%, (56.1±14.4)%, (35.3±7.9)%, (96.7±0.1)%, (95.7±1.7)% and (99.6±0.5)%, respectively. The high dissolved air efficiency of 98.7% and the generation of charged micro-bubbles effectively enhanced the removal efficiency of TN, NH4+-N, COD, SS and oils. The average TN and NH4+-N removal efficiency in the high-speed ionic air flotation were 3.6 and 3.5 times as high as that of conventional dissolved air flotation, which is conducive to the stable operation of the subsequent biochemical system. During full-scale operation at the 35 000 m3/d slaughtering and meat processing wastewater treatment plant, the operation cost of the high-speed ion air flotation unit was 2.67 CNY/m3, which is 84.2% of that of conventional dissolved air flotation and indicates a clear cost advantage while meeting the pretreatment targets.
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