CAJ | 학술논문

为了检验同步半硝化-厌氧氨氧化颗粒污泥工艺( simultaneous partial nitritation/Anammox with granular sludge,SPNAGS)对低氨氮污水的生物脱氮效果,开展了长期的小试试验研究。结果显示,在污水氨氮浓度从200 mg/L降到20~50 mg/L时,系统中的颗粒污泥发生解体,难以保持颗粒状,且污泥颜色由原来的红棕色变为灰黄色,系统仍然保持很高的氨氮去除率(>95%),但总氮的去除率却逐渐降低,最后仅有20%左右,约80%的氨氮转化为硝酸盐。因此,本研究进一步证明了该工艺在应用于低氨氮浓度污水生物脱氮时,系统内亚硝酸盐氧化细菌( nitrite-oxidizing bacteria, NOB)的控制既是关键,也是挑战。
위료검험동보반초화-염양안양화과립오니공예( simultaneous partial nitritation/Anammox with granular sludge,SPNAGS)대저안담오수적생물탈담효과,개전료장기적소시시험연구。결과현시,재오수안담농도종200 mg/L강도20~50 mg/L시,계통중적과립오니발생해체,난이보지과립상,차오니안색유원래적홍종색변위회황색,계통잉연보지흔고적안담거제솔(>95%),단총담적거제솔각축점강저,최후부유20%좌우,약80%적안담전화위초산염。인차,본연구진일보증명료해공예재응용우저안담농도오수생물탈담시,계통내아초산염양화세균( nitrite-oxidizing bacteria, NOB)적공제기시관건,야시도전。
To evaluate the performance of the simultaneous partial nitritation/Anammox with granular sludge ( SPNAGS ) process to treat low ammonia concentration wastewater, a lab-scale study was conducted. Results show that when ammonia concentration is 20~50 mg/L, granular sludge breaks up gradually and the color varies from reddish-brown to grayish yellow, although the ammonia removal rate is always higher than 95%, the total nitrogen ( TN ) removal rate is only 20% at the final phase of the experiment. 80% ammonia is converted into nitrate. Thus, the out-selection of wastewater nitrite-oxidizing bacteria ( NOB ) control is very important to the SPNAGS process to treat low ammonia concentration wastewater.