硫酸盐还原对氨氧化的影响及其抑制特性研究

通过化学热力学分析和试验,探讨了厌氧环境中硫酸盐的还原对氨氧化的影响.热力学分析表明:厌氧条件下,废水中的氨和硫酸盐可以彼此作为电子供体和受体进行同步脱氮除硫反应.试验结果表明:适当的条件下可以获得与热力学分析相同的结果.如果条件不当,硫酸盐过度还原产生的硫化物对厌氧氨氧化过程产生抑制.系统中硝酸盐的存在,可以使硫酸盐还原过程减弱,硝酸盐对硫酸盐还原过程的抑制表现为可逆的竞争性抑制,但受到抑制的厌氧氨氧化难以恢复.硫化物对氨的厌氧氧化过程表现为不可逆抑制.

Study on the influence of sulphate reduction on ANAMMOX and nitrate inhibition to sulphate reduction

The is study explores the influence of sulphate reduction on ANAMMOX through thermodynamics analysis and experiment.The analysis of thermodynamics shows that the process of simultaneous removal of nitrogen and sulphur(ANSRNS) may be carried out under anaerobic condition.NH~4_ is the electron donor,while SO_4~(2-) is the electron acceptor.When the experimental condition is proper,the result may be the same.If the condition is improper,overly reduction of sulphate can inhibit the course of ANSRNS.Using nitrate as inhibitor,the process can be inhibited,but the phenomenon of ANAMMOX cannot be found again.Dynamic analysis shows that the inhibiting process of sulfide to ANAMMOX is irreversible,but the inhibition of nitrate to sulphate reduction is reversible and emulous.