【摘要】：采用包埋固定化活性污泥法進(jìn)行污水深度處理脫氮,針對不同初始總氮濃度的模擬廢水,基于序批式間歇反應(yīng)器的小試實驗,探討了包埋顆粒的脫氮效果及其微生物種群特性.結(jié)果表明,在包埋顆粒的體積投加率為10%,實驗水溫為10~15℃,DO為2~4 mg·L~(-1)和初始COD濃度為80~100 mg·L~(-1)條件下,不同初始總氮濃度(10~45 mg·L~(-1))和C/N比(1.78~10)的各反應(yīng)器中,穩(wěn)定期包埋顆粒的最大總氮去除負(fù)荷為7.78~23.18 mg·(L·h)~(-1).掃描電鏡發(fā)現(xiàn),包埋顆粒具有較好的孔隙結(jié)構(gòu),且顆粒內(nèi)部與表面均存在微生物附著生長,已成為微生物的良好載體.高通量測序結(jié)果表明,較初始包埋污泥,包埋顆粒內(nèi)部與表面的微生物群落構(gòu)成發(fā)生了顯著變化,包埋顆粒內(nèi)微生物多樣性良好,顆粒中脫氮菌屬優(yōu)勢明顯.包埋顆粒中存在異養(yǎng)硝化-好氧反硝化菌屬,提升了包埋顆粒內(nèi)非傳統(tǒng)生物脫氮途徑的潛能.
[Abstract]:The denitrification of wastewater by immobilized activated sludge was studied in this paper. The denitrification effect and microbial population characteristics of the entrapped particles were discussed based on the experimental results of sequencing batch reactor for simulated wastewater with different initial total nitrogen concentrations. The results show that under the conditions of 10% volume addition of embedded particles, 1015 鈩，

本文編號：2225749