【摘要】：中溫電輔助厭氧折流板反應器(BES-ABR)在實現(xiàn)高濃度有機廢水沿程分相降解的同時,能有效減緩反應器內有機酸的積累;上流式厭氧污泥床(UASB)反應器是厭氧生物處理的經(jīng)典技術,利于培養(yǎng)污泥活性更好的顆粒污泥,對不同類廢水的適應能力強,無需專門的分離裝置,即可實現(xiàn)氣液固分離,可實現(xiàn)氣液固自摻混,不容易出現(xiàn)短流和水力死角。本實驗是針對中溫BES-ABR、中溫UASB、高溫UASB反應器的運行特性研究,其中ABR容積為5格共3.5L,UASB容積為5L。中溫條件為中溫(35±1)℃和高溫(52.5±2.5)℃。實驗結果表明,本實驗以中溫條件下BES-ABR反應器和UASB反應器的運行對比、不同溫度下UASB反應器運行的對比,得出同溫下ABR反應器對污泥水熱脫水濾液濃度的耐受限大于UASB反應器;同UASB反應器下,高溫條件下產氣量和處理污泥水熱脫水濾液濃度更高,中溫條件下,COD去除率更高,產氣效率更高。BES-ABR反應器處理污泥水熱脫水濾液,在進水COD濃度在19000mg/L時,BES-ABR反應器對污泥水熱脫水濾液的COD去除率仍能保持在75%以上;單日單反應容積產CH4量可達1600m L/(L.d);總VFA濃度在6000-13000mg HAC/L,VFA的去除率則由60%逐步上升至85%以上;抑制產甲烷的氨氮范圍為1.76-2.20g/L,氨氮去除率穩(wěn)定在27%左右;各格室污泥負荷分別保持在0.14~0.39、0.035~0.20、0.078~0.11、0.078~0.15 kg COD/(kg污泥·d)可以滿足54%以上的COD去除,各格室最佳污泥負荷分別為0.14、0.035、0.078、0.078 kg COD/(kg污泥·d);各格室容積負荷分別保持在2.81~14.68、0.89~8.02、0.97~6.17、0.94~6.38 kg COD/(m~3·d)可以滿足54%以上的COD去除,各格室最佳容積負荷分別為6.24、1.75、2.18、2.12kg COD/(m~3·d)。中溫UASB反應器穩(wěn)定運行后COD去除率在75%左右,中溫UASB反應器所能處理的污泥水熱脫水濾液的COD濃度極限在17080-18510mg/L之間;單日單反應體積產甲烷量在8.90~239.86 m L/(L.d)范圍內;進水COD濃度提高到18510mg/L以下時,VFA去除率穩(wěn)定在97%左右;穩(wěn)定NH4+-N去除率基本都在25%-50%;污泥負荷為0.06~0.39 kg COD/(kg污泥·d),最佳污泥負荷保持在0.22~0.39 kg COD/(kg污泥·d)范圍內,極限污泥負荷在0.39 kg COD/(kg污泥·d);容積負荷在3.14~19.16 kg COD/(m~3·d)之間,最佳容積負荷為19.16 kg COD/(m~3·d)。高溫UASB反應器穩(wěn)定運行后COD去除率在65%以上;產甲烷量為14.58~520.24 m L/(L.d);VFA去除率可達85%以上,提高進水COD到24000mg/L,VFA去除率開始下降,第186天,出水VFA達到6243mg HAC/L,VFA去除率僅為48%,說明反應器內已經(jīng)發(fā)生了酸化,出水有機酸濃度與反應器酸化直接相關;氨氮濃度抑制產甲烷范圍為0.97-1.45g/L,這與同類研究相比較窄,之后抑制效果不再明顯變化;出水p H范圍在6.99~7.97之間,且反應器運行穩(wěn)定后基本穩(wěn)定在7.7左右;出水堿度范圍在2157.38~7665.37mg Ca CO3/L;ORP范圍在-186~-419m V,大部分落在甲烷菌產氣最適范圍內;最佳污泥負荷為0.10~0.24 kg COD/(kg污泥·d),最佳容積負荷為13.29~15.08 kg COD/(m~3·d)。
[Abstract]:The medium temperature electrically assisted anaerobic baffle reactor (BES-ABR) can effectively slow down the accumulation of organic acids while realizing the phase degradation of high concentration organic wastewater along the process. Upflow anaerobic sludge bed (UASB) reactor is a classical technology of anaerobic biological treatment, which is beneficial to the cultivation of granular sludge with better sludge activity. it has strong adaptability to different types of wastewater and can realize gas-liquid-solid separation without a special separation device. Gas-liquid-solid self-mixing can be realized, and short flow and hydraulic dead angle are not easy to appear. In this experiment, the operation characteristics of medium temperature BES-ABR, medium temperature UASB, high temperature UASB reactor were studied, in which the ABR volume was 3.5 L and the ABR volume was 5 L. The medium temperature conditions are (35 鹵1) 鈩，

本文編號：2494161