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。%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.
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