论文部分内容阅读
为解决低温水中氨氮难去除的问题,将新菌种——哈尔滨不动细菌HITLi 7~T(占总菌量的80%)和专利菌种、菌剂构建低温除氨氮的优势菌群,形成生物增强活性炭工艺(BEAC),并前置臭氧(O_3)氧化,后置紫外/氯耦合(UV/Cl),构成O_3-BEAC-UV/Cl新工艺,并在4种工况下运行,确定该工艺的最佳运行条件,分析其对消毒副产物的控制情况。结果表明,投加O_3可以提高水中可生物降解有机物(BDOC)的量,提高BEAC工艺对氨氮的去除率。当臭氧投加量为1~2mg/L,氯氮比为3~4,紫外光强为15 m W/cm~2时,O_3-BEAC-UV/Cl工艺可在0~1℃条件下将原水中1~2 mg/L的氨氮去除至0.2~0.3 mg/L,且消毒副产物生成量极低,满足《生活饮用水卫生标准》(GB 5749—2006)的要求。
In order to solve the problem of difficult removal of ammonia nitrogen in low-temperature water, a new strain of HITLi 7-T (accounting for 80% of the total bacteria) and the proprietary bacteria and fungi were used to construct the dominant microflora in ammonia-nitrogen removal at low temperature (BEAC) with O_3 oxidation and UV / Cl coupling to form a new O_3-BEAC-UV / Cl process and run it under four conditions The process of the best operating conditions, analysis of their disinfection by-products control. The results showed that adding O_3 can increase the amount of biodegradable organic matter (BDOC) in water and improve the removal rate of ammonia nitrogen by BEAC process. When ozone dosage is 1 ~ 2mg / L, chlorine to nitrogen ratio is 3 ~ 4 and UV intensity is 15 mW / cm ~ 2, The ammonia nitrogen of 1 ~ 2 mg / L in raw water is removed to 0.2 ~ 0.3 mg / L, and the amount of disinfection by-products is very low, which meets the requirements of “sanitary standard of drinking water” (GB 5749-2006).