摘要
采用非固定氧供给模式和固定氧供给模式对序批式活性污泥反应器的硝化性能进行了研究。结果表明供氧模式对序批式活性污泥反应器的硝化能力、硝化产物和污泥组成有重要影响。在非固定氧供给模式下,亚硝酸化和硝酸化同时进行,最终反应产物为硝酸盐。在固定氧供给模式下,亚硝酸化和硝酸化顺序发生,如果反应时间不足,出流中将含有大量亚硝酸盐。亚硝酸菌具有碳氧化菌的饱食饥饿(feastfamine)能力;而硝酸菌则没有。饥饿对亚硝酸菌在低氧下的氧化起着关键作用。
High ammonium nitrification was studied for a SBR feactor with unfixed and fixed oxygen supply rates.Experimental results showed that oxygen supply models have significant efects on the nitrification ability and product as well as the composition of the sludge of SBR for high ammonoum nitrification.Ammonium and nitrite oxidations were taking place simultaneously with unfixed oxygen supply model but seqentially with fixed oxygen supply model.Ammonium oxidizers developed an ability to endure the fluctuation of DO and nitrite oxidizers did not.Extensive starvation under high DO played a critical role in ammonium oxidation under following low DO.
出处
《环境工程》
CAS
CSCD
北大核心
1999年第6期10-13,共4页
Environmental Engineering
基金
科技部中法科技合作项目
