CAJ | 학술논문

以木薯酒精废水为碳源，通过批次实验研究了亚硝酸盐对厌氧产酸耦合反硝化系统的影响。结果表明，投加600 mg·L-13NO--N后的最终产酸量与空白反应器相差不大，但是投加相同浓度亚硝酸盐后产酸受到严重抑制，最终产酸量仅为空白反应器的1.8%。而硝酸盐还原过程中厌氧产酸受到抑制可能是由于反硝化中间产物亚硝酸盐的存在，低投加量的亚硝酸盐即可对厌氧产酸产生强烈的抑制作用并具有持续性，且对各产酸组分的影响作用：正丁酸＞丙酸＞乙酸。随着2COD/NO--N的降低，亚硝酸盐的还原率由74.9%降低至22.2%。当游离亚硝酸（free nitrous acid, FNA）浓度为0.05 mg·L-1以上时，亚硝酸盐还原几乎被完全抑制（90%以上）。此外，随着2COD/NO--N的增加，反硝化所占的比例逐渐减小，而DNRA过程（dissimilatory nitrate reduction to ammonium，异化硝酸盐还原为铵）逐渐占优势。
이목서주정폐수위탄원，통과비차실험연구료아초산염대염양산산우합반초화계통적영향。결과표명，투가600 mg·L-13NO--N후적최종산산량여공백반응기상차불대，단시투가상동농도아초산염후산산수도엄중억제，최종산산량부위공백반응기적1.8%。이초산염환원과정중염양산산수도억제가능시유우반초화중간산물아초산염적존재，저투가량적아초산염즉가대염양산산산생강렬적억제작용병구유지속성，차대각산산조분적영향작용：정정산＞병산＞을산。수착2COD/NO--N적강저，아초산염적환원솔유74.9%강저지22.2%。당유리아초산（free nitrous acid, FNA）농도위0.05 mg·L-1이상시，아초산염환원궤호피완전억제（90%이상）。차외，수착2COD/NO--N적증가，반초화소점적비례축점감소，이DNRA과정（dissimilatory nitrate reduction to ammonium，이화초산염환원위안）축점점우세。
The effects of nitrite on integrated process of denitrification with anaerobic acidification were conducted in a batch reactor using cassava stillage (CS) as substrate. The results showed that the final volatile fatty acids(VFA) production of anaerobic reactor was similar for with and without adding nitrate (600 mg·L-1 3NO--N ) , but severe inhibiton of acidogenesis took place after adding the same amount of nitrite and the final VFA production was only 1.8% of that of the blank reactor. The decrease of anaerobic acid production in the nitrate reduction process was mainly due to the presence of nitrite. A small amount of nitrite could strongly suppress anaerobic acidogenesis, and the effects of nitrite on VFA composition was n-butyric>propionic>acetic acid. With decrease of 2COD/NO--N ratio, nitrite reduction rate decreased from 74.9% to 22.2%, and was suppressed almost completely (>90%) at the concentration free nitrous acid (FNA) above 0.05 mg·L-1. Furthermore, with increase of 2COD/NO--N ratio the proportion of denitrification decrease gradually in nitrite reduction, while dissimilatory nitrate reduction to ammonium (DNRA) process became dominant gradually.