CAJ | 학술논문

为了提高曝气生物滤池(BAF)对景观水体的脱氮效果,开发了前置反硝化BAF工艺,考察了其对景观水体的处理效果及影响因素,并与传统BAF工艺作比较.结果表明,前置反硝化BAF工艺对TN和浊度的去除效果明显优于传统BAF工艺,前者对TN和浊度的平均去除率分别为45%和88%,而后者的分别为30%和47%;两种工艺对COD和氨氮的去除效果相近,但前置反硝化BAF工艺的出水水质更稳定;对于前置反硝化BAF工艺,当水力负荷为1.42～4.95 m/h时,对COD、氨氮和TN的去除率均随水力负荷的增加而降低;在水力负荷为2.12 m/h的条件下,回流比对COD和氨氮的去除效果影响不大,但对TN的去除率随回流比的增加呈先升高后降低的趋势,最佳回流比为1.5:1;另外,对TN的去除率随进水C/N值的增加而升高,当C/N6时,系统的脱氮效果较好.
위료제고폭기생물려지(BAF)대경관수체적탈담효과,개발료전치반초화BAF공예,고찰료기대경관수체적처리효과급영향인소,병여전통BAF공예작비교.결과표명,전치반초화BAF공예대TN화탁도적거제효과명현우우전통BAF공예,전자대TN화탁도적평균거제솔분별위45%화88%,이후자적분별위30%화47%;량충공예대COD화안담적거제효과상근,단전치반초화BAF공예적출수수질경은정;대우전치반초화BAF공예,당수력부하위1.42～4.95 m/h시,대COD、안담화TN적거제솔균수수력부하적증가이강저;재수력부하위2.12 m/h적조건하,회류비대COD화안담적거제효과영향불대,단대TN적거제솔수회류비적증가정선승고후강저적추세,최가회류비위1.5:1;령외,대TN적거제솔수진수C/N치적증가이승고,당C/N6시,계통적탈담효과교호.
In order to improve the removal efficiency of nitrogen from landscape water by biological aerated filter (BAF), the pre-denitfification BAF process was developed.The treatment efficiency of landscape water and the influence factors were investigated, and the pre-denitrification BAF was com-pared with traditional BAF.The results indicate that the removal efficiencies of TN and turbidity by the pre-denitrification BAF are better than those by traditional BAF.The removal rates of TN and turbidity by the pre-denitrification BAF and traditional BAF are 45%, 88% and 30%, 47% respectively.The re-moval efficiencies of COD and ammonia nitrogen by two kinds of processes are similar, hut the effluent quality of the pre-denitrification BAF is more stable.For the pre-denitrification BAF, when the hydraulic load is 1.42 to 4.95 m/h, the removal rates of COD, ammonia nitrogen and tiN decrease with the hy-draulic load increasing.When the hydraulic load is 2.12 m/h, the return ratio has little effect on the re-moval of COD and ammonia nitrogen, but the removal rate of TN increases first and then decreases with the return ratio increasing, and the optimal return ratio is 1.5 : 1.In addition, the removal rate of TN in-creases with increasing of the influent C/N ratio.When the C/N ratio exceeds 6, the nitrogen removal ef-ficiency of the system is better.