CAJ | 학술논문

采用悬浮填料生物接触氧化法对福州市东南区水厂的微污染原水进行预处理,考察了该工艺的处理效果及影响因素,并针对原水中污染物的周期性变化规律,提出了可行的工艺设计参数和建议.结果表明,当原水的氨氮和COD_(Mn)分别为(0.15～2.0)、(2～4.1)mg/L时,在HRT为1h、气水比为1:1的工况下,生物接触氧化工艺对氨氮和COD_(Mn)的去除效果较好,平均去除率分别可达70%以上和15%左右.随HRT的缩短、水温的降低及气水比的减小,系统对氨氮的去除效果会相应下降,但原水的水温基本满足工艺的要求,而要保持填料的流化状态,曝气量需在2m~3/(m~2·h)以上.可行的生物预处理工艺设计参数:采用两级生物接触氧化工艺串联运行,总HRT为45～60 min、总气水比为(0.8～1.2):1.
채용현부전료생물접촉양화법대복주시동남구수엄적미오염원수진행예처리,고찰료해공예적처리효과급영향인소,병침대원수중오염물적주기성변화규률,제출료가행적공예설계삼수화건의.결과표명,당원수적안담화COD_(Mn)분별위(0.15～2.0)、(2～4.1)mg/L시,재HRT위1h、기수비위1:1적공황하,생물접촉양화공예대안담화COD_(Mn)적거제효과교호,평균거제솔분별가체70%이상화15%좌우.수HRT적축단、수온적강저급기수비적감소,계통대안담적거제효과회상응하강,단원수적수온기본만족공예적요구,이요보지전료적류화상태,폭기량수재2m~3/(m~2·h)이상.가행적생물예처리공예설계삼수:채용량급생물접촉양화공예천련운행,총HRT위45～60 min、총기수비위(0.8～1.2):1.
The micro-polluted raw water of Dongnan Waterworks in Fuzhou City was treated by biological contact oxidation process with suspended media, and the treatment efficiency and influence factors were investigated.The feasible process design parameters and suggestions were proposed according to periodic change of pollutants in the raw water.The results show when the ammonia nitrogen and COD_(Mn).in the raw water are 0.15 to 2.0 mg/L and 2 to 4.1 mg/L respectively, the biological contact oxidation process has good removal efficiencies of ammonia nitrogen and COD_(Mn) under the HRT of 1 h and the air/ water ratio of 1 : 1, and the average removal rates are above 70% and about 15% respectively.The removal efficiency of ammonia nitrogen decreases with the decrease of HRT, water temperature and air/water ratio.The raw water temperature can meet the process, and the aeration rate needs to be above 2 m~3/(m~2·h) in order to keep the fluidized state of suspended media.The feasible bio-pretreatment process design parameters are two-stage series, the total HRT of 45 to 60 min and the total air/water ratio of (0.8 -1.2) : 1.