Effects of C/N, C/S and S/N ratios on TOC and nitrogen removal in the sulfate reduction-sulfur denitrification process
Effects of C/N, C/S and S/N ratios on TOC and nitrogen removal in the sulfate reduction-sulfur denitrification process
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硫酸盐还原-硫脱硝过程中C/N、C/S和S/N比对TOC和脱氮的影响
DOI：
10.2965/jwet.2003.7
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
T. Komori
中科院分区：
文献类型：
--
作者：
R. Yamamoto;T. Komori
采用两个上流式生物滤池反应器，考察了C/N、C/S和S/N比对硫酸盐还原硫磺脱氮工艺中总有机碳和反硝化效果的影响。当C/N=2.2时，S/N=0.7时，反应器具有较高的TOC和脱氮比。在第一个反应器中，硫酸盐还原是主要发生的。在C/S=3.1时，SRB主要产醋酸酯。当C/S=1.6时，乙酸乙酯在第一反应器中分解。在第二段反应器中，硫磺反硝化和异养反硝化同时进行。在S/N=0.7时，反应器下部发生了硫的反硝化作用，第一个反应器产生的硫化物全部被重新氧化。另一方面，在S/N=1.3时，反应器上部也发生了硫的反硝化作用，生物膜中积累了35 mg/gSS的硫磺颗粒。硫磺颗粒对反硝化作用起着重要作用。第二反应器中SDNB的活性比DNB的活性低约3-4倍。随着S/N比的增加，SDNB活性增加，DNB活性降低。SDNB数大于DNB数。随着S/N比的增大，第一级反应器中SRB的活性增加。SRB在缺氧二级反应器中也有生长，且二级反应器中SRB的活性较高。在该反应器中可以建立由硫酸盐还原和硫反硝化组成的硫磺循环。
Effects of C/N, C/S and S/N ratios on TOC and denitrification removal were examined in the sulfate reductionsulfur denitrification process using the two upflow biological filter reactors. High TOC and nitrogen removal ratio was obtained at C/N=2.2 and S/N=0.7 through the reactors. In the first reactor, sulfate reduction occurred predominantly. SRB mainly produced acetate at C/S=3.1. However, acetate was decomposed in the first reactor at C/S=1.6. In the second reactor, sulfur denitrification and heterotrophic denitrification occurred simultaneously. Sulfur denitrification occurred in the lower part of the reactor in S/N=0.7, and all sulfide produced in the first reactor was re-oxidized. On the other hand, sulfur denitrification also occurred in the upper part of the reactor in S/N=1.3, and 35 mg/gSS of sulfur granules were accumulated in the biofilm. The sulfur granules played an important role on denitrification. The activity of SDNB in the second reactor was about 3-4 times lower than the activity of DNB. When the S/N ratio increased, the activity of SDNB increased and those of DNB decreased. The number of SDNB was greater than those of DNB. The activity of SRB in the first reactor increased, when S/N ratio increased. SRB also grew in the anoxic second reactor, and the activity of SRB in the second reactor was relatively high. The sulfur cycle consist of sulfate reduction and sulfur denitrification in the second reactor might be established in the reactor.