CAJ | 학술논문

针对水源水中硝酸盐氮(NO3-N),采用批实验开展了生物脱氮研究,考察了碳源种类对生物脱氮的影响,并考察了豌豆杆作为固体碳源时颗粒铁、碳源用量、NO3-N初始浓度和水温等因素对生物脱氮的影响.实验结果表明:甲醇、豌豆杆和木屑完全脱氮的时间分别为2天、7天和30天;三种碳源均会引起亚硝酸盐氮的短暂积累,但最大积累量出现的时间不同;在模拟水中富含溶解氧时,含有颗粒铁的反应瓶在2天内可以实现完全脱氮,而对照瓶仅去除45.7%的NO3-N;第2天时,1 g豌豆杆时NO3-N去除率为47.8%,3 g时去除率为71.9%,而5 g时去除率为99.6%;低浓度和高浓度时的豌豆杆生物脱氮速率分别是11.28 mg/L/d和10.91 mg/L/d;15℃时的豌豆杆生物脱氮速率约为33℃时的1/3,27℃时的脱氮速率约为33℃时的3/4.碳源种类、颗粒铁、豌豆杆用量和水温显著影响豌豆杆生物脱氮效果;在既定浓度范围内(5.65 mg/L-21.92 mg/L), NO3-N初始浓度对生物脱氮基本无影响.
침대수원수중초산염담(NO3-N),채용비실험개전료생물탈담연구,고찰료탄원충류대생물탈담적영향,병고찰료완두간작위고체탄원시과립철、탄원용량、NO3-N초시농도화수온등인소대생물탈담적영향.실험결과표명:갑순、완두간화목설완전탈담적시간분별위2천、7천화30천;삼충탄원균회인기아초산염담적단잠적루,단최대적루량출현적시간불동;재모의수중부함용해양시,함유과립철적반응병재2천내가이실현완전탈담,이대조병부거제45.7%적NO3-N;제2천시,1 g완두간시NO3-N거제솔위47.8%,3 g시거제솔위71.9%,이5 g시거제솔위99.6%;저농도화고농도시적완두간생물탈담속솔분별시11.28 mg/L/d화10.91 mg/L/d;15℃시적완두간생물탈담속솔약위33℃시적1/3,27℃시적탈담속솔약위33℃시적3/4.탄원충류、과립철、완두간용량화수온현저영향완두간생물탈담효과;재기정농도범위내(5.65 mg/L-21.92 mg/L), NO3-N초시농도대생물탈담기본무영향.
@@@@According to nitrate-nitrogen (NO3-N) in source water, batch study was conducted to explore biological denitrification, investigate the effect of carbon source type on biological denitrifi-cation, and identify the effects of granulated iron, mass of carbon source, NO3-N initial concentration and water temperature on bi-ological denitrification when pea straw acted as a solid organic carbon source. Experimental results indicated that it took 2 days, 7 days and 30 days for methanol, pea straw and wood chip to completely remove NO3-N respectively. They three caused tem-porary nitrite-nitrogen accumulation, but accumulation peaks occurred at different time points. In dissolved oxygen-rich simu-lated water, the reaction bottle with granulated iron could com-pletely degrade NO3-N in 2 days, whereas the control bottle without iron could remove 45.7%of initial NO3-N. NO3-N per-cent removals were 47.8%, 71.9%, and 99.6%at 1 g, 3 g and 5 g of pea straw, respectively. The pea straw-supported denitrifica-tion rates were respectively 11.28 mg/L/d and 10.91 mg/L/d for the low and high concentrations. The pea straw-supported deni-trification rate at 15 oC was approximately 1/3 of the rate ob-served at 33 oC; the denitrification rate at 27 oC was 3/4 of the rate at 33 oC. Carbon source type, granulated iron, mass of car-bon source and water temperature significantly influence the per-formance of the biological denitrification. At the same time, in the given concentration range of 5.65 mg/L-21.92 mg/L, NO3-N ini-tial concentration has a minor effect on the biological denitrifica-tion.