后置曝氣膜法雙污泥工藝運行特性
發(fā)布時間：2019-05-28 08:14
【摘要】：我國南方城市生活污水具有低COD/P的水質(zhì)特性,傳統(tǒng)工藝處理COD/P比較低的污水時氮、磷很難同時達標。反硝化除磷工藝具有良好的同步脫氮除磷效果,同時能節(jié)約碳源、降低污泥產(chǎn)量。本課題針對COD/P比較低的城市生活污水,以現(xiàn)有的A_2N雙污泥工藝為基礎(chǔ),提出一種新改進的雙污泥脫氮除磷工藝,即后置曝氣膜法雙污泥工藝(A_2NO-MBR);本論文主要研究該工藝處理模擬生活污水和實際生活污水的運行特性及系統(tǒng)的菌群結(jié)構(gòu)變化特征。(1)A_2NO-MBR工藝處理模擬生活污水,當COD/P分別為20,30,40,50和60時,出水COD均低于30mg/L,出水氨氮分別為1mg/L,2.5mg/L,7.3mg/L,6.92mg/L和5.59mg/L,出水TN分別為16.96mg/L、14.5mg/L、11.4mg/L、9.92mg/L和8.94mg/L,當COD/P比為30-60時,出水TP小于0.15mg/L,而COD/P比為20時,出水TP為0.73mg/L;p H和ORP的在線監(jiān)測可用來反映厭氧釋磷、缺氧反硝化除磷的進程,ORP還能指示厭氧釋磷程度;DO和p H可以聯(lián)合指示硝化反應(yīng)的終點,故p H和ORP可用來指示A_2NO-MBR工藝中的厭氧釋磷和缺氧吸磷過程特征。(2)A_2NO-MBR工藝處理模擬生活污水,隨著COD/P比的降低,污泥的活性逐漸下降;COD/P比為60厭氧初期釋磷速率和污泥含磷量變化最大,COD/P比為50、40和30系統(tǒng)次之,COD/P比為20系統(tǒng)最小,厭氧階段COD濃度的變化與污泥的釋磷量呈線性關(guān)系;隨著進水COD/P比的升高,反硝化除磷速率與好氧除磷速率比例在不斷下降,最高達到96.4%;在缺氧階段和后置曝氣階段除磷微生物可利用體內(nèi)的儲藏PHB作為電子供體進行反硝化除磷和好氧除磷。(3)微生物學(xué)分析結(jié)果表明,種泥與系統(tǒng)污泥樣品在門級別上均以Proteobacteria(變形菌門)為主導(dǎo);模擬生活污水COD/P比為50、模擬生活污水COD/P比為20及實際生活污水的A_2OSBR系統(tǒng)污泥中Proteobacteria、Bacteroidetes、Chloroflexi、Chlorobi四種門的比例均高于90%,種泥次之,在N-MBR系統(tǒng)污泥中最少。在屬級別上,模擬生活污水COD/P比為50、模擬生活污水COD/P比為20及實際生活污水的A_2OSBR系統(tǒng)污泥中與聚磷有關(guān)的Candidatus Accumulibacter和Dechloromonas所占比例較大,分別為20.9%、10.89%和13.5%,而與聚糖菌有關(guān)的Candidatus Competibacter依次為9.44%、10.94%和15.07%;Nitrospira(硝化螺旋菌)和Nitrosomonas(亞硝化菌屬)在N-MBR池中明顯得到富集。(4)A_2NO-MBR工藝處理實際生活污水結(jié)果表明,進水COD、氨氮、TN和TP分別為100~320mg/L、50~57mg/L、52~59mg/L和4mg/L左右;COD/P比為27、52和75出水TN依次為22.5mg/L、15.56mg/L和13.48mg/L,出水COD均低于30mg/L,出水氨氮為8.53mg/L~9.63mg/L,出水TP均低于0.5mg/L;COD的去除主要發(fā)生在厭氧段,厭氧期間COD的利用率隨COD/P升高而上升,高COD/P比系統(tǒng)厭氧末端COD和TP濃度遠高于低COD/P比系統(tǒng),COD的去除速率和釋磷速率與進水COD/P比呈正相關(guān)性;系統(tǒng)及缺氧期間的TN去除率隨著COD/P比的升高而上升,而NH_4~+-N去除的變化不明顯,且低COD/P比系統(tǒng)缺氧末端出現(xiàn)明顯的硝酸鹽累積;缺氧期間TP的去除速率與TN和NO_3~--N的去除速率成正相關(guān)性。
[Abstract]:The domestic sewage in the southern city of China has the characteristics of low COD/ P, and the wastewater with low COD/ P is difficult to reach the standard at the same time. The denitrification and phosphorus removal process has good synchronous nitrogen and phosphorus removal effect, meanwhile, the carbon source can be saved, and the sludge yield can be reduced. On the basis of the existing A _ 2N double-sludge process, a new and improved double-sludge nitrogen and phosphorus removal process, that is, a post-aeration membrane double-sludge process (A _ 2NO-MBR), is put forward based on the existing A _ 2N double-sludge process. This paper mainly studies the operation characteristics of the simulated domestic sewage and the actual domestic sewage, and the characteristics of the structure of the bacteria in the system. (1) A _ 2NO-MBR process is used to process the simulated domestic sewage. When the COD/ P is 20,30,40,50 and 60, the effluent COD is lower than 30mg/ L, and the effluent ammonia nitrogen is 1 mg/ L, 2.5 mg/ L, 7.3 mg/ L, 6.92 mg/ L and 5.59 mg/ L, respectively. The effluent TN is 16.96 mg/ L, 14.5 mg/ L, 11.4 mg/ L, 9.92 mg/ L and 8.94 mg/ L, respectively, when the COD/ P ratio is 30-60, the effluent TP is less than 0.15 mg/ L, and the COD/ P ratio is 20, the effluent TP is 0.73 mg/ L; the on-line monitoring of the p H and the ORP can be used to reflect the process of anaerobic phosphorus release, anoxic denitrification and phosphorus removal, the ORP can also indicate the degree of anaerobic phosphorus release, DO and p H can jointly indicate the end point of the nitrification reaction, Therefore, p H and ORP can be used to indicate the process characteristics of anaerobic phosphorus release and anoxic phosphorus absorption in the A _ 2 NO-MBR process. (2) A _ 2NO-MBR process is used to process the simulated domestic sewage, with the decrease of the COD/ P ratio, the activity of the sludge is gradually decreased, the COD/ P ratio is 60 anaerobic initial phosphorus release rate and the sludge phosphorus content change is the largest, the COD/ P ratio is 50,40 and 30 are the second, the COD/ P ratio is 20 system minimum, The change of COD concentration in the anaerobic stage is linear with that of the sludge; with the increase of the COD/ P ratio of the influent, the rate of denitrification and phosphorus removal rate and the rate of the aerobic phosphorus removal rate decrease continuously, up to 96.4%; In that anoxic stage and post-aeration stage, the phosphorus-removal microorganism can use the storage PHB in the body as an electron donor for denitrification and dephosphorization and aerobic phosphorus removal. (3) The results of the microbiological analysis show that the sludge samples and the sludge samples of the system are dominated by the Proteobacteria. The COD/ P ratio of the simulated domestic sewage is 50, and the COD/ P ratio of the simulated domestic sewage is 20, and the sludge of the A _ 2OSBR system of the actual domestic sewage is Proteobacteria, Bacteroides, and Chloroform, The proportion of the four types of the chlorobis is higher than 90%, the seed mud is the second, and the sludge in the N-MBR system is the least. The ratio of COD/ P ratio of simulated domestic sewage to COD/ P ratio of 50, simulated domestic sewage COD/ P ratio of 20 and actual domestic sewage was 20.9%, 10.89% and 13.5%, respectively. 10.94% and 15.07%; Nitroca (Nitrifying bacteria) and Nitromonas (Nitrosomonas) were significantly enriched in the N-MBR pool. (4) The results of A _ 2NO-MBR process on the actual domestic sewage show that the influent COD, ammonia nitrogen, TN and TP are 100-320 mg/ L,50-57 mg/ L,52-59 mg/ L and 4 mg/ L, respectively; the COD/ P ratio is 27,52 and 75, the effluent TN is 22.5 mg/ L, 15.56 mg/ L and 13.48 mg/ L, the effluent COD is lower than 30 mg/ L, the effluent ammonia nitrogen is 8.53 mg/ L-9.63 mg/ L, and the effluent TP is lower than 0.5 mg/ L; The removal of COD mainly occurs in the anaerobic section, the utilization rate of COD in the anaerobic period increases with the increase of COD/ P, the COD and TP concentration of the anaerobic end of the high COD/ P ratio system are much higher than that of the low COD/ P ratio system, and the removal rate and the phosphorus release rate of the COD are positive correlation with the influent COD/ P ratio; The TN removal rate of the system and the anoxic period increased with the increase of COD/ P ratio, while the change of the removal of NH _ 4 ~ +-N was not obvious, and the low COD/ P ratio showed significant nitrate accumulation at the anoxic end of the system. The removal rate of TP during hypoxia was positively correlated with the removal rate of TN and NO _ 3 ~-N.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X703
本文編號：2486893
[Abstract]:The domestic sewage in the southern city of China has the characteristics of low COD/ P, and the wastewater with low COD/ P is difficult to reach the standard at the same time. The denitrification and phosphorus removal process has good synchronous nitrogen and phosphorus removal effect, meanwhile, the carbon source can be saved, and the sludge yield can be reduced. On the basis of the existing A _ 2N double-sludge process, a new and improved double-sludge nitrogen and phosphorus removal process, that is, a post-aeration membrane double-sludge process (A _ 2NO-MBR), is put forward based on the existing A _ 2N double-sludge process. This paper mainly studies the operation characteristics of the simulated domestic sewage and the actual domestic sewage, and the characteristics of the structure of the bacteria in the system. (1) A _ 2NO-MBR process is used to process the simulated domestic sewage. When the COD/ P is 20,30,40,50 and 60, the effluent COD is lower than 30mg/ L, and the effluent ammonia nitrogen is 1 mg/ L, 2.5 mg/ L, 7.3 mg/ L, 6.92 mg/ L and 5.59 mg/ L, respectively. The effluent TN is 16.96 mg/ L, 14.5 mg/ L, 11.4 mg/ L, 9.92 mg/ L and 8.94 mg/ L, respectively, when the COD/ P ratio is 30-60, the effluent TP is less than 0.15 mg/ L, and the COD/ P ratio is 20, the effluent TP is 0.73 mg/ L; the on-line monitoring of the p H and the ORP can be used to reflect the process of anaerobic phosphorus release, anoxic denitrification and phosphorus removal, the ORP can also indicate the degree of anaerobic phosphorus release, DO and p H can jointly indicate the end point of the nitrification reaction, Therefore, p H and ORP can be used to indicate the process characteristics of anaerobic phosphorus release and anoxic phosphorus absorption in the A _ 2 NO-MBR process. (2) A _ 2NO-MBR process is used to process the simulated domestic sewage, with the decrease of the COD/ P ratio, the activity of the sludge is gradually decreased, the COD/ P ratio is 60 anaerobic initial phosphorus release rate and the sludge phosphorus content change is the largest, the COD/ P ratio is 50,40 and 30 are the second, the COD/ P ratio is 20 system minimum, The change of COD concentration in the anaerobic stage is linear with that of the sludge; with the increase of the COD/ P ratio of the influent, the rate of denitrification and phosphorus removal rate and the rate of the aerobic phosphorus removal rate decrease continuously, up to 96.4%; In that anoxic stage and post-aeration stage, the phosphorus-removal microorganism can use the storage PHB in the body as an electron donor for denitrification and dephosphorization and aerobic phosphorus removal. (3) The results of the microbiological analysis show that the sludge samples and the sludge samples of the system are dominated by the Proteobacteria. The COD/ P ratio of the simulated domestic sewage is 50, and the COD/ P ratio of the simulated domestic sewage is 20, and the sludge of the A _ 2OSBR system of the actual domestic sewage is Proteobacteria, Bacteroides, and Chloroform, The proportion of the four types of the chlorobis is higher than 90%, the seed mud is the second, and the sludge in the N-MBR system is the least. The ratio of COD/ P ratio of simulated domestic sewage to COD/ P ratio of 50, simulated domestic sewage COD/ P ratio of 20 and actual domestic sewage was 20.9%, 10.89% and 13.5%, respectively. 10.94% and 15.07%; Nitroca (Nitrifying bacteria) and Nitromonas (Nitrosomonas) were significantly enriched in the N-MBR pool. (4) The results of A _ 2NO-MBR process on the actual domestic sewage show that the influent COD, ammonia nitrogen, TN and TP are 100-320 mg/ L,50-57 mg/ L,52-59 mg/ L and 4 mg/ L, respectively; the COD/ P ratio is 27,52 and 75, the effluent TN is 22.5 mg/ L, 15.56 mg/ L and 13.48 mg/ L, the effluent COD is lower than 30 mg/ L, the effluent ammonia nitrogen is 8.53 mg/ L-9.63 mg/ L, and the effluent TP is lower than 0.5 mg/ L; The removal of COD mainly occurs in the anaerobic section, the utilization rate of COD in the anaerobic period increases with the increase of COD/ P, the COD and TP concentration of the anaerobic end of the high COD/ P ratio system are much higher than that of the low COD/ P ratio system, and the removal rate and the phosphorus release rate of the COD are positive correlation with the influent COD/ P ratio; The TN removal rate of the system and the anoxic period increased with the increase of COD/ P ratio, while the change of the removal of NH _ 4 ~ +-N was not obvious, and the low COD/ P ratio showed significant nitrate accumulation at the anoxic end of the system. The removal rate of TP during hypoxia was positively correlated with the removal rate of TN and NO _ 3 ~-N.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X703
【參考文獻】
相關(guān)期刊論文 前10條
1 王梅香;趙偉華;王淑瑩;黃宇;潘聰;彭永臻;;A_2N_2系統(tǒng)反硝化除磷性能的優(yōu)化及穩(wěn)定運行[J];中國環(huán)境科學(xué);2016年11期
2 彭永臻;呂冬梅;王淑瑩;;進水COD及投加方式對A~2O-BAF工藝反硝化聚磷的影響[J];北京工業(yè)大學(xué)學(xué)報;2016年09期
3 敬雙怡;王曉云;陳青蕊;于玲紅;楊文煥;李衛(wèi)平;;A~2/O—BAF工藝對生活污水的脫氮除磷效能研究[J];中國給水排水;2016年11期
4 Mei Tian;Fangqing Zhao;Xin Shen;Kahou Chu;Jinfeng Wang;Shuai Chen;Yan Guo;Hanhu Liu;;The first metagenome of activated sludge from full-scale anaerobic/anoxic/oxic(A2O) nitrogen and phosphorus removal reactor using Illumina sequencing[J];Journal of Environmental Sciences;2015年09期
5 王聰;王淑瑩;張淼;唐裕芳;曾薇;彭永臻;;厭氧/缺氧/好氧生物接觸氧化處理低碳氮比污水的物料平衡[J];農(nóng)業(yè)工程學(xué)報;2014年19期
6 鄒海明;呂錫武;李婷;;污水處理反硝化除磷-誘導(dǎo)結(jié)晶磷回收工藝中除磷微生物特性[J];農(nóng)業(yè)工程學(xué)報;2014年05期
7 許德超;陳洪波;李小明;楊麒;曾恬靜;羅冠;彭波;汪志龍;謝繼慈;;靜置/好氧/缺氧序批式反應(yīng)器(SBR)脫氮除磷效果研究[J];環(huán)境科學(xué)學(xué)報;2014年01期
8 張為堂;侯鋒;劉青松;邵彥青;薛曉飛;彭永臻;;HRT和曝氣量對AAO-BAF系統(tǒng)反硝化除磷性能的影響[J];化工學(xué)報;2014年04期
9 李繼;呂小梅;董文藝;張真江;范翊;王維康;;A_2N/BAF組合工藝深度除磷脫氮研究[J];哈爾濱工業(yè)大學(xué)學(xué)報;2012年02期
10 張華;黃健;唐玉朝;湯利華;;有機基質(zhì)對反硝化除磷效果的影響[J];環(huán)境科學(xué)與技術(shù);2012年02期
相關(guān)博士學(xué)位論文 前1條
1 毛躍建;廢水處理系統(tǒng)中重要功能類群Thauera屬種群結(jié)構(gòu)與功能的研究[D];上海交通大學(xué);2009年
相關(guān)碩士學(xué)位論文 前2條
1 楊勇光;碳源種類對反硝化除磷系統(tǒng)的影響及反硝化聚磷菌(DPB)的分離[D];重慶大學(xué);2010年
2 石瑾;MSBR污水脫氮除磷工藝試驗研究及工程應(yīng)用[D];同濟大學(xué);2007年
，本文編號：2486893
本文鏈接：http://sikaile.net/shengtaihuanjingbaohulunwen/2486893.html
最近更新
教材專著
