缺氧环境下硫酸盐还原对反硝化过程影响的特性试验研究

对缺氧环境下硫酸盐还原对反硝化脱氮过程影响进行了试验研究。试验结果表明和单纯的热力学和动力学分析不同,在硫酸盐和硝酸盐同时存在的生物脱氮体系中,具备着反硝化和硫酸盐还原同时进行的环境条件。缺氧环境下硫酸盐还原过程影响了反硝化脱氮效果和反硝化历程,即硫酸盐初始浓度越高,硝氮的去除率越低,当硫酸盐浓度从0mg/L增加到2000mg/L时,脱氮效率从100%降低到81.4%,脱氮速率从6.428mg/L.min降低到4.04mg/L.min,并且发现在硫酸盐影响下的反硝化过程出现了氨氮积累的现象。本研究结果对富含硫酸盐的有机废水生物处理有指导意义。

THE INFLUENCE OF SULFATE REDUCTION ON DENITRIFICATION UNDER ANOXIC CONDITION

It has been conducted an experimental study on the effect of sulfate reduction on denitrification under anoxic condition.The results have demonstrated that the efficiency,the rate and the course of the denitrification process have been changed by the sulfate reduction process.The efficiency of denitrification decreased from 100% to 81.4% when the concentration of sulfate was increased.The maximum denitrification rate ranged from 6.428 mg/L·min to 4.04 mg/L·min when the concentration of sulfate solution was varied from 0 mg/L to 2 000 mg/L.Accordingly, the results have shown that the ammonia nitrogen was accumulated during the denitrification process which has been changed by the sulfate reduction process.