[1]刘妍,滕一杰,周家中,等.纯膜MBBR用于南方某大型水质净化厂改造效果分析[J].中国给水排水,2022,38(1):1-8.
LIU Yan,TENG-Yi-jie,ZHOU-Jizhong,et al.Operation Effect of Pure MBBR Process Used in a Large-scale Water Purification Plant in South China[J].China Water & Wastewater,2022,38(1):1-8.
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LIU Yan,TENG-Yi-jie,ZHOU-Jizhong,et al.Operation Effect of Pure MBBR Process Used in a Large-scale Water Purification Plant in South China[J].China Water & Wastewater,2022,38(1):1-8.
纯膜MBBR用于南方某大型水质净化厂改造效果分析
中国给水排水[ISSN:1000-4062/CN:12-1073/TU]
卷:
第38卷
期数:
2022年第1期
页码:
1-8
栏目:
出版日期:
2022-01-01
- Title:
- Operation Effect of Pure MBBR Process Used in a Large-scale Water Purification Plant in South China
- Keywords:
- micro-polluted river water; pure MBBR process; intermittent operation; gas-water ratio; ammonia nitrogen; SPSS analysis
- 摘要:
- 南方某大型水质净化厂设计处理规模为260×104 m3/d，主要处理微污染河道水。为提高系统的硝化能力，采用纯膜MBBR工艺对原平流沉淀池末端进行改造。悬浮载体全部投加3 d后，出水氨氮<1.0 mg/L，达到了设计标准。稳定运行期间，系统出水氨氮浓度为（0.19±0.14） mg/L，氨氮平均去除率达到91.64%，稳定达到《地表水环境质量标准》（GB 3838—2002）Ⅱ类水质标准。纯膜MBBR系统具备良好的间歇运行能力，悬浮载体离水7 d后恢复通水，用时4 d即可保障出水氨氮浓度达标。考察了温度、水力负荷、进水氨氮浓度、气水比对出水氨氮浓度的影响，并采用SPSS软件进行统计分析。结果显示，对出水氨氮浓度的影响程度排序为水温>进水氨氮浓度>>水力负荷和气水比。出水氨氮浓度与水温呈负相关，与进水氨氮浓度呈正相关。纯膜MBBR工艺良好的抗低温和水质冲击性能以及合理的设计参数，确保了在温度<15 ℃以及进水水质波动较大的情况下出水水质稳定达到设计标准。气水比对出水氨氮浓度影响较小，在0.7~2.0的气水比条件下悬浮载体流化良好，出水氨氮浓度均值<0.5 mg/L，稳定达标。水力负荷对出水氨氮几乎没有影响，系统具备良好的耐水力冲击性能。经过纯膜MBBR工艺改造后，系统出水COD、BOD5、TP、SS均优于改造前，项目总运行费用为0.076~0.109 元/m3。
- Abstract:
- The design treatment capacity of a large-scale water purification plant in South China is 260×104 m3/d, mainly for treatment of micro-polluted river water. In order to improve the nitrification capacity of the system, the end of the original horizontal flow sedimentation tank was modified by pure MBBR process. Three days after all the suspended carriers were added, the concentration of NH3-N in the effluent was less than 1.0 mg/L, which reached the design standard. During stable operation, the concentration of NH3-N in the effluent of the system was (0.19 ± 0.14) mg/L, and the average NH3-N removal rate was 91.64%, which stably reached the class Ⅱ criteria specified in the Environmental Quality Standards for Surface Water (GB 3838-2002). The pure MBBR system had a good intermittent operation capability. After the suspended carrier were dried out of water for 7 days, the pure MBBR system was restored to water. It only took 4 days to recover its removal performance of NH3-N. The effects of temperature, hydraulic load, influent NH3-N concentration, gas-water ratio on the NH3-N concentration of effluent were studied, and SPSS software was used for statistical analysis. The results showed that the factors affecting the effluent NH3-N concentration were temperature > influent NH3-N concentration>> hydraulic load and gas-water ratio. The effluent NH3-N concentration had negative and positive correlation with water temperature and influent NH3-N concentration respectively. Based on the excellent resistance to low temperature and water quality impact of the pure MBBR process and reasonable design parameters, it ensured that the effluent NH3-N concentration reached the design standards stably when the temperature was lower than 15 ℃ and the influent quality fluctuated greatly. The gas-water ratio had little effect on the effluent NH3-N concentration. Under the condition of gas?water ratio of 0.7-2.0, the fluidization of suspended carriers was good, and the average effluent NH3-N concentration was less than 0.5 mg/L. The hydraulic load had almost no effect on the effluent NH3-N concentration, and the system had good hydraulic shock resistance. After the reconstruction of pure MBBR process, the effluent COD, BOD5, TP and SS of the system were better than those of before transformation. The total operation cost of the project was 0.076-0.109 yuan/m3.
更新日期/Last Update:
2022-01-01