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

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23d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1700mg/L,ORP稳定在-445mV,产气量稳定在2.8L/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。

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/SO4^2- 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, 1 700 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.