水中硫酸盐对一体式A/O反应器启动的影响

The Influence of Sulfate on Integrated A/O Wastewater Treatment Systems under Different Starting Modes

  • 摘要: 利用开发的新型一体式A/O反应器研究水中有无硫酸盐对一体式A/O反应器启动的影响。结果表明,经过23 d的启动期,未投加硫酸盐时,反应器厌氧段CODCr去除率为93%,好氧段CODCr去除率为90%。投加硫酸盐(碳硫浓度比为5:1)时,反应器厌氧段CODCr去除率降为90%,好氧段CODCr去除率降为80%,且系统的pH稳定在8.0~8.5,碱度稳定在1 700 mg/L,ORP稳定在-445 mV,产气量稳定在2.8 L/d,气相组分中CH4浓度稳定在27.9%,CO2浓度稳定在52.5%。表明一体化A/O反应器在处理含硫酸盐有机废水时具有良好的稳定性。

     

    Abstract: A novel type of integrated A/O reactor was used to study influence of addition of sulfate on the starting-up of the integration A/O reactor. The results showed that if without addition of sulfate, CODCr removal rate in anaerobic zone was as high as 93%, and CODCr removal rate in aerobic zone was as high as 90%, after 23 days of start-up period. If with addition of sulfate and the CODCr/SO42- was 5:1, CODCr removal rate in anaerobic zone decreased to 90%, and CODCr removal rate in aerobic zone decreased to 80%. At the same time, the system’s pH, alkalinity, ORP, gas production, gas phase component of CH4, CO2 were respectively stably at 8.0-8.5, 1700 mg/L, -445 mV, 2.8 L/d, 27.9% and 52.5%, which showed that the integration A/O reactor had good stability when treating the wastewater contained sulfate.

     

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