本文選題：SBR + 磁場增強作用�。� 參考：《環(huán)境科學》2017年11期

【摘要】：SBR反應(yīng)器的應(yīng)用越來越普遍,為進一步提高其處理效率,提出在SBR反應(yīng)體系再外加一個磁場來提高其運行性能.研究了不同磁感應(yīng)強度對反應(yīng)系統(tǒng)污染物降解效率的影響,并采用Mi Seq高通量測序技術(shù)解析了磁場條件下活性污泥微生物群落多樣性變化.結(jié)果表明,磁場的加入在一定程度上提高了SBR系統(tǒng)的運行性能,且當磁感應(yīng)強度為7×10~(-2)T時效果最明顯.其中,外加磁場對SBR反應(yīng)系統(tǒng)中總氮去除效果的影響顯著,在7×10~(-2)T時脫氮率從無磁場的65.69%提高到85.98%.外加磁場顯著提高了污泥脫氫酶活性,因而也會對各種污染物的去除產(chǎn)生積極作用.通過對不同磁感應(yīng)強度下活性污泥微生物群落多樣性的比較發(fā)現(xiàn),7×10~(-2)T磁場下活性污泥微生物豐度及多樣性最高.實驗SBR反應(yīng)器中的細菌域共鑒定出14個門,主要以變形菌門Proteobacteria(25.3%~61.5%)、擬桿菌門Bacteroidetes(18.6%~46.2%)、放線菌門Actinobacteria(5.3%~47.2%)、酸桿菌門Acidobacteria(0.4%~4.0%)為主.重要的脫氮細菌:如α-Proteobacteria的Rhodoblastus、Paracoccus;β-Proteobacteria的Alicycliphilus、Comamonas、Xenophilus、Acidovorax、Dechloromonas、Thauera;δ-Proteobacteria的Desulfovibrio;Planctomycetes門等,在中等磁感應(yīng)強度尤其是7×10~(-2)T時,豐度最高,與脫氮效率增加有內(nèi)在的聯(lián)系.典型的PAOs如Acinetobacter、Pseudomonas、Propionicimonas等,在中等磁場條件下含量較高,與除磷率變化趨勢相同.活性污泥中細菌群落結(jié)構(gòu)變化與污水處理效率存在一定相關(guān)性,外加磁場通過改變微生物群落結(jié)構(gòu)影響污水處理效果.
[Abstract]:The application of SBR reactor is becoming more and more common. In order to further improve the treatment efficiency, a magnetic field is added to the SBR reaction system to improve its performance. The effect of magnetic induction intensity on the degradation efficiency of pollutants in the reaction system was studied, and the diversity of activated sludge microbial community under magnetic field was analyzed by Mi Seq high-throughput sequencing technique. The results show that the operation performance of SBR system is improved to some extent by the addition of magnetic field, and the effect is most obvious when the magnetic induction intensity is 7 脳 10 ~ (-2) T. The effect of applied magnetic field on the removal of total nitrogen in SBR reaction system was significant, and the denitrification rate increased from 65.69% to 85.98% at 7 脳 10 ~ (-1) ~ (-2) T. The application of magnetic field can significantly increase the activity of sludge dehydrogenase, which will also have a positive effect on the removal of various pollutants. By comparing the diversity of activated sludge microbial communities under different magnetic induction intensities, it was found that the microbial abundance and diversity of activated sludge were the highest in magnetic field with 7 脳 10 ~ (10) ~ (-2) T magnetic field. A total of 14 bacteria were identified in the SBR reactor, mainly composed of Proteobacteriae 25.3B, Bacteroidetes18.662, Actinobacteria 5.32 and Acidobacteria 0.44.0. Important denitrification bacteria, such as Rhodoblastusus Paracoccusis in 偽 -Proteobacteria, Alicycliphilusphilus comamonophilus Acidovorax Dechloromonas Thauera, Desulfovibrio Planctomycetes door of 未 -Proteobacteria, have the highest abundance when the medium magnetic intensity is 7 脳 10 ~ (-2) T, which is closely related to the increase of nitrogen removal efficiency. Typical PAOs, such as Acinetobacter Pseudomonas spp., have a higher content under medium magnetic field, and the trend is the same as that of phosphorus removal rate. The change of bacterial community structure in activated sludge was related to the sewage treatment efficiency. The effect of sewage treatment was affected by changing the structure of microbial community by external magnetic field.
【作者單位】： 山東農(nóng)業(yè)大學資源與環(huán)境學院;
【基金】：山東省重點研發(fā)計劃項目(2016CYJS05A02)
【分類號】：X172;X703

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本文編號：2006407