發(fā)布時間：2019-06-06 07:08

【摘要】：中溫電輔助厭氧折流板反應(yīng)器(BES-ABR)在實現(xiàn)高濃度有機(jī)廢水沿程分相降解的同時,能有效減緩反應(yīng)器內(nèi)有機(jī)酸的積累;上流式厭氧污泥床(UASB)反應(yīng)器是厭氧生物處理的經(jīng)典技術(shù),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(yīng)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(yīng)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(jié)果表明,本實驗以中溫條件下BES-ABR反應(yīng)器和UASB反應(yīng)器的運行對比、不同溫度下UASB反應(yīng)器運行的對比,得出同溫下ABR反應(yīng)器對污泥水熱脫水濾液濃度的耐受限大于UASB反應(yīng)器;同UASB反應(yīng)器下,高溫條件下產(chǎn)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(chǎn)氣效率更高。BES-ABR反應(yīng)器處理污泥水熱脫水濾液,在進(jìn)水COD濃度在19000mg/L時,BES-ABR反應(yīng)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(yīng)容積產(chǎn)CH4量可達(dá)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(chǎn)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(fù)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(fù)荷分別為0.14、0.035、0.078、0.078 kg COD/(kg污泥·d);各格室容積負(fù)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(fù)荷分別為6.24、1.75、2.18、2.12kg COD/(m~3·d)。中溫UASB反應(yīng)器穩(wěn)定運行后COD去除率在75%左右,中溫UASB反應(yīng)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(yīng)體積產(chǎn)甲烷量在8.90~239.86 m L/(L.d)范圍內(nèi);進(jìn)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(fù)荷為0.06~0.39 kg COD/(kg污泥·d),最佳污泥負(fù)荷保持在0.22~0.39 kg COD/(kg污泥·d)范圍內(nèi),極限污泥負(fù)荷在0.39 kg COD/(kg污泥·d);容積負(fù)荷在3.14~19.16 kg COD/(m~3·d)之間,最佳容積負(fù)荷為19.16 kg COD/(m~3·d)。高溫UASB反應(yīng)器穩(wěn)定運行后COD去除率在65%以上;產(chǎn)甲烷量為14.58~520.24 m L/(L.d);VFA去除率可達(dá)85%以上,提高進(jìn)水COD到24000mg/L,VFA去除率開始下降,第186天,出水VFA達(dá)到6243mg HAC/L,VFA去除率僅為48%,說明反應(yīng)器內(nèi)已經(jīng)發(fā)生了酸化,出水有機(jī)酸濃度與反應(yīng)器酸化直接相關(guān);氨氮濃度抑制產(chǎn)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(yīng)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(chǎn)氣最適范圍內(nèi);最佳污泥負(fù)荷為0.10~0.24 kg COD/(kg污泥·d),最佳容積負(fù)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