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Improvement of nitrification efficiency by bioaugmentation in sequencing batch reactors at low temperature

Di CUI,Ang LI,Tian QIU,Rui CAI,Changlong PANG,Jihua WANG,Jixian YANG,Fang MA,Nanqi REN

《环境科学与工程前沿（英文）》 2014年 第8卷 第6期   页码 937-944 doi: 10.1007/s11783-014-0668-7

摘要： Bioaugmentation is an effective method of treating municipal wastewater with high ammonia concentration in sequencing batch reactors (SBRs) at low temperature (10°C). The cold-adapted ammonia- and nitrite- oxidizing bacteria were enriched and inoculated, respectively, in the bioaugmentation systems. In synthetic wastewater treatment systems, the average -N removal efficiency in the bioaugmented system (85%) was much higher than that in the unbioaugmented system. The effluent -N concentration of the bioaugmented system was stably below 8 mg·L after 20 d operation. In municipal wastewater systems with bioaugmentation, the effluent -N concentration was below 8 mg·L after 15 d operation. The average -N removal efficiency in unbioaugmentation system (about 82%) was lower compared with that in the bioaugmentation system. By inoculating the cold-adapted nitrite-oxidizing bacteria (NOB) into the SBRs after 10 d operation, the nitrite concentration decreased rapidly, reducing the -N accumulation effectively at low temperature. The functional microorganisms were identified by PCR-DGGE, including uncultured sp., uncultured sp., sp. and uncultured sp. The results suggested that the cold-adapted microbial agent of ammonia-oxidizing bacteria (AOB) and NOB could accelerate the start-up and promote achieving the stable operation of the low-temperature SBRs for nitrification.

关键词： nitrification     sequencing batch reactors (SBRs)     bioaugmentation     low temperature    

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Comparative study on microbial community in intermittently aerated sequencing batch reactors (SBR) and

Xiaolin Sheng, Rui Liu, Xiaoyan Song, Lujun Chen, Kawagishi Tomoki

《环境科学与工程前沿（英文）》 2017年 第11卷 第3期 doi: 10.1007/s11783-017-0929-3

摘要： A traditional sequencing batch reactor (SBR) and two intermittently aerated sequencing batch reactors (IASBRs) were parallelly operated for treating digested piggery wastewater. Their microbial communities were analyzed, and the nitrogen removal performance was compared during the long–term run. IASBRs demonstrated higher removal rates of total nitrogen (TN) and ammonium nitrogen (NH -N) than the SBR, and also demonstrated higher resistance against TN shock load. It was found that the more switch times between aerobic/anoxic in an IASBR, the higher the removal rates of TN and NH –N. All the reactors were predominated by , and , which were considered to be species of denitrifiers, ammonium oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB), respectively. However, the abundance and diversity was of great difference. Compared with SBR, IASBRs achieved higher abundance of denitrification–related bacteria. IASBR 1 with four aerobic/anoxic switch times was detected with 25.63% of , higher than that in IASBR 2 with two aerobic/anoxic switch times (11.57% of ), and much higher than that in the SBR (only 6.19% of ). IASBR 2 had the highest percentage of AOB, while IASBR 1 had the lowest percentage. The denitrifiers abundance was significantly positive correlated with the TN removal rate. However, the NH –N removal rate showed no significant correlation with the AOB abundance, but might relate to the AOB activity which was influenced by the average free ammonium (FA) concentration. was the only NOB genus detectable in all reactors, and were less than 0.03%.

关键词： Digested piggery wastewater     Intermittent aeration     Microbial community     Partial nitrification–denitrification process     Sequencing batch reactor (SBR)    

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Advanced nitrogen removal by pulsed sequencing batch reactors (SBR) with real-time control

YANG Qing, PENG Yongzhen, YANG Anming, LI Jianfeng, GUO Jianhua

《环境科学与工程前沿（英文）》 2007年 第1卷 第4期   页码 488-492 doi: 10.1007/s11783-007-0078-1

摘要： The feasibility of pH and oxidation reduction potential (ORP) as on-line control parameters to advance nitrogen removal in pulsed sequencing batch reactors (SBR) was evaluated. The pulsed SBR, a novel operational mode of SBR, was

关键词： reduction potential     oxidation reduction     operational     feasibility     nitrogen    

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Treatment of swine wastewater in aerobic granular reactors: comparison of different seed granules as

Lin LIU,Qiyu YOU,Valerie GIBSON,Xu HUANG,Shaohua CHEN,Zhilong YE,Chaoxiang LIU

《环境科学与工程前沿（英文）》 2015年 第9卷 第6期   页码 1139-1148 doi: 10.1007/s11783-015-0823-9

摘要： The granulation process, physic-chemical properties, pollution removal ability and bacterial communities of aerobic granules with different feed-wastewater (synthetic wastewater, R1; swine wastewater, R2), and the change trend of some parameters of two types of granules in long-term operated reactors treating swine wastewater were investigated in this experiment. The result indicated that aerobic granulation with the synthetic wastewater had a faster rate compared with swine wastewater and that full granulation in R1 and R2 was reached on the 30th day and 39th day, respectively. However, although the feed wastewater also had an obvious effect on the biomass fraction and extracellular polymeric substances of the aerobic granules during the granulation process, these properties remained at a similar level after long-term operation. Moreover, a similar increasing trend could also be observed in terms of the nitrogen removal efficiencies of the aerobic granules in both reactors, and the average specific removal rates of the organics and ammonia nitrogen at the steady-state stage were 35.33 mg·g VSS and 51.46 mg·g VSS for R1, and 35.47 mg·g VSS and 51.72 mg·g VSS for R2, respectively. In addition, a shift in the bacterial diversity occurred in the granulation process, whereas bacterial communities in the aerobic granular reactor were not affected by the seed granules after long-term operation.

关键词： aerobic granules     livestock wastewater     sequencing batch reactor     biological wastewater treatment     bacterial community    

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Effects of shear force on formation and properties of anoxic granular sludge in SBR

Xinyan ZHANG, Binbin WANG, Qingqing HAN, Hongmei ZHAO, Dangcong PENG

《环境科学与工程前沿（英文）》 2013年 第7卷 第6期   页码 896-905 doi: 10.1007/s11783-013-0539-7

摘要： This paper reports the effects of shear force on anoxic granular sludge in sequencing batch reactors (SBR). The study was carried out in two SBRs (SBR1 and SBR2) in which sodium acetate (200 mg COD·L ) was used as the sole substrate and sodium nitrate (40 mgNO -N·L ) was employed as the electron acceptor. The preliminary objective of this study was to cultivate anoxic granules in the SBR in order to investigate the effects of shear force on the formation of anoxic granular sludge and to compare the properties of anoxic sludge in the SBR. This study reports new results for the values of average velocity gradient, a measure of the applied shear force, which was varied in the two SBRs (3.79 s and 9.76 s for SBR1 and SBR2 respectively). The important findings of this research highlight the dual effects of shear force on anoxic granules. A low shear force can produce large anoxic granules with high activity and poor settling ability, whereas higher shear forces produce smaller granules with better settling ability and lower activity. The results of this study show that the anoxic granulation is closely related to the strength of the shear force. For high shear force, this research demonstrated that: 1) granules with smaller diameters, high density and good settling ability were formed in the reactor, and 2) granular sludge formed faster than it did in the low shear force reactor (41days versus 76 days). Once a steady-state has been achieved, the nitrate and COD removal rates were found to be 98% and 80%, respectively. For low shear force, such as was applied in SBR1, this research demonstrated that: 1) the activity of anoxic granular sludge in low shear force was higher than that in high shear force, 2) higher amount of soluble microbial products (SMPs) were produced, and 3) large pores were observed inside the larger granules, which are beneficial for nitrogen gas diffusion. Electron microscopic examination of the anoxic granules in both reactors showed that the morphology of the granules was ellipsoidal with a clear outline. Coccus and rod-shaped bacteria were wrapped by filamentous bacteria on the surface of granule.

关键词： denitrification     anoxic granular sludge     sequencing batch reactors (SBR)     shear force    

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Simultaneous denitrifying phosphorus accumulation in a sequencing batch reactor

YUAN Linjiang, HAN Wei, WANG Lei, YANG Yongzhe, WANG Zhiying

《环境科学与工程前沿（英文）》 2007年 第1卷 第1期   页码 23-27 doi: 10.1007/s11783-007-0004-6

摘要： In order to achieve simultaneous nitrogen and phosphorus removal in the biological treatment process, denitrifying phosphorus accumulation (DNPA) and its affecting factors were studied in a sequencing batch reactor (SBR) with synthetic wastewater. The results showed that when acetate was used as the sole carbon resource in the influent, the sludge acclimatized under anaerobic/aerobic operation had good phosphorus removal ability. Denitrifying phosphorus accumulation was observed soon when fed with nitrate instead of aeration following the anaerobic stage, which is a vital premise to DNPA. If DNPA sludge is fed with nitrate prior to the anaerobic stage, the DNPA would weaken or even disappear. At the high concentration of nitrate fed in the anoxic stage, the longer anoxic time needed, the better the DNPA was. Induced DNPA did not disappear even though an aerobic stage followed the anoxic stage, but the shorter the aerobic stage lasted, the higher the proportions of phosphorus removal via DNPA to total removal.

关键词： SBR     synthetic wastewater     Induced DNPA     resource     removal ability    

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Nitrifying and denitrifying bacteria in aerobic granules formed in sequencing batch airlift reactors

WANG Fang, YANG Fenglin, QI Aijiu

《环境科学与工程前沿（英文）》 2007年 第1卷 第2期   页码 184-189 doi: 10.1007/s11783-007-0032-2

摘要： The purpose of this study was to investigate nitrifying bacteria and denitrifying bacteria isolated from aerobic granules. Aerobic granules were formed in an internal-circulate sequencing batch airlift reactor (SBAR) and biodegradation of NH3--N was analyzed in the reactor. Bacteria were isolated and determined from aerobic granules using selected media. The growth properties and morphology of bacteria colonies were observed by controlling aerobic or anaerobic conditions in the culture medium. It was found that bacteria in aerobic granules were diverse and some of them were facultative aerobes. The diversity of bacteria in aerobic granules was a premise of simultaneous nitrification and denitrification.
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Effects of La, Ce on nitrogen removal in sequencing batch reactor

Qing XIA , Rui LIANG , Yuning HONG , Lili DING , Hongqiang REN , Yuxiang MAO , Mingyu ZHAO ,

《环境科学与工程前沿（英文）》 2009年 第3卷 第3期   页码 369-374 doi: 10.1007/s11783-009-0036-1

摘要： Batch experiments were conducted to study the short-term biological effects of rare earth ions (La, Ce) and their mixture on the nitrogen removal in a sequencing batch reactor (SBR). The data showed that higher NH―N removal rate, total inorganic nitrogen removal efficiency, and denitrification efficiency were achieved at lower concentrations of rare earth elements (REEs) (<1mg/L). In the first hour of the aeration stage of SBR, the presence of REEs increased the total inorganic nitrogen removal efficiency and NH―N removal efficiency by 15.7% and 10%―15%, respectively. When the concentrations of REEs were higher than 1mg/L, the total inorganic nitrogen removal efficiency decreased, and nitrate was found to accumulate in the effluent. When the concentrations of REEs was up to 50.0mg/L, the total inorganic nitrogen removal efficiency was less than 30% of the control efficiency with a high level of nitrate. Lower concentrations of REEs were found to accelerate the nitrogen conversion and removal in SBR.

关键词： rare earth     La3+     Ce3+     inorganic nitrogen     nitrogen removal     sequencing batch reactor    

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Influence of aeration intensity on the performance of A/O-type sequencing batch MBR system treating azo

Xinhua WANG, Jingmei LI, Xiufen LI, Guocheng DU

《环境科学与工程前沿（英文）》 2011年 第5卷 第4期   页码 615-622 doi: 10.1007/s11783-011-0362-y

摘要： Among the numerous parameters affecting the membrane bioreactor (MBR) performance, the aeration intensity is one of the most important factors. In the present investigation, an anoxic/aerobic-type (A/O-type) sequencing batch MBR system, added anoxic process as a pretreatment to improve the biodegradability of azo dye wastewater, was investigated under different aeration intensities and the impact of the aeration intensity on effluent quantity, sludge properties, extracellular polymeric substances (EPS) amount generated as well as the change of permeation flux were examined. Neither lower nor higher aeration intensities could improve A/O-type sequencing batch MBR performances. The results showed 0.15 m ·h aeration intensity was promising for treatment of azo dye wastewater under the conditions examined. Under this aeration intensity, chemical oxygen demand (COD), ammonium nitrogen and color removal as well as membrane flux amounted to 97.8%, 96.5%, 98.7% and 6.21 L·m ·h , respectively. The effluent quality, with 25.0 mg·L COD, 0.84 mg·L ammonium nitrogen and 8 chroma, could directly meet the reuse standard in China. In the meantime, the sludge relative hydrophobicity, the bound EPS, soluble EPS and EPS amounts contained in the membrane fouling layer were 70.3%, 52.0 mg·g VSS, 38.8 mg·g VSS and 90.8 mg·g VSS, respectively, which showed close relationships to both pollutant removals and membrane flux.

关键词： batch membrane bioreactor     azo dye     aeration intensity     extracellular polymeric substances     sludge properties    

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Mechanism studies on nitrogen removal when treating ammonium-rich leachate by sequencing batch biofilm

XU Zhengyong, YANG Zhaohui, ZENG Guangming, XIAO Yong, DENG Jiuhua

《环境科学与工程前沿（英文）》 2007年 第1卷 第1期   页码 43-48 doi: 10.1007/s11783-007-0008-2

摘要： The nitrogen removal mechanism was studied and analyzed when treating the ammonium-rich landfill leachate by a set of sequencing batch biofilm reactors (SBBRs), which was designed independently. At the liquid temperature of (32?0.4)?C, and after a 58-days domestication period and a 33-days stabilization period, the efficiency of ammonium removal in the SBBR went up to 95%. Highly frequent intermittent aeration suppressed the activity of nitratebacteria, and also eliminated the influence on the activity of anaerobic ammonium oxidation (ANAMMOX) bacteria and nitritebacteria. This influence was caused by the accumulation of nitrous acid and the undulation of pH. During the aeration stage, the concentration of dissolved oxygen was controlled at 1.2 1.4 mg/L. The nitritebacteria became dominant and nitrite accumulated gradually. During the anoxic stage, along with the concentration debasement of the dissolved oxygen, ANAMMOX bacteria became dominant; then, the nitrite that was accumulated in the aeration stage was wiped off with ammonium simultaneously.

关键词： undulation     33-days stabilization     concentration debasement     temperature     accumulation    

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Process evaluation of an alternating aerobic-anoxic process applied in a sequencing batch reactor for

ZENG Wei, PENG Yongzhen, WANG Shuying

《环境科学与工程前沿（英文）》 2007年 第1卷 第1期   页码 28-32 doi: 10.1007/s11783-007-0005-5

摘要： In order to improve the nitrogen removal efficiency and save operational cost, the feasibility of the alternating aerobic-anoxic process (AAA process) applied in a sequencing batch reactor (SBR) system for nitrogen removal was investigated. Under sufficient influent alkalinity, the AAA process did not have an advantage over one aerobicanoxic (OAA) cycle on treatment efficiency because microorganisms had an adaptive stage at the alternating aerobic-anoxic transition, which would prolong the total cycling time. On the contrary, the AAA process made the system control more complicated. Under deficient influent alkalinity, when compared to OAA, the AAA process improved treatment efficiency and effluent quality with NH-N in the effluent below the detection limit. In the nitrification, the average stoichiometric ratio between alkalinity consumption and ammonia oxidation is calculated to be 7.07 mg CaCO/mg NH-N. In the denitrification, the average stoichiometric ratio between alkalinity production and NO-N reduction is about 3.57 mg CaCO/mg NO-N. As a result, half of the alkalinity previously consumed during the aerobic nitrification was recovered during the subsequent anoxic denitrification period. That was why the higher treatment efficiency in the AAA process was achieved without the supplement of bicarbonate alkalinity. If the lack of alkalinity in the influent was less than 1/3 of that needed, there is no need for external alkalinity addition and treatment efficiency was the same as that under sufficient influent alkalinity. Even if the lack of alkalinity in the influent was more than 1/3 of that needed, the AAA process was an optimal strategy because it reduced the external alkalinity addition and saved on operational cost.

关键词： bicarbonate alkalinity     sufficient influent     influent alkalinity     detection     alkalinity production    

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N2O emission from a sequencing batch reactor for biological N and P removal from wastewater

Lei SHEN,Yuntao GUAN,Guangxue WU,Xinmin ZHAN

《环境科学与工程前沿（英文）》 2014年 第8卷 第5期   页码 776-783 doi: 10.1007/s11783-013-0586-0

摘要： Nitrous oxide (N O) is a greenhouse gas that can be released during biological nitrogen removal from wastewater. N O emission from a sequencing batch reactor (SBR) for biological nitrogen and phosphorus removal from wastewater was investigated, and the aims were to examine which process, nitrification or denitrification, would contribute more to N O emission and to study the effects of heterotrophic activities on N O emission during nitrification. The results showed that N O emission was mainly attributed to nitrification rather than to denitrification. N O emission during denitrification mainly occurred with stored organic carbon as the electron donor. During nitrification, N O emission was increased with increasing initial ammonium or nitrite concentrations. The ratio of N O emission to the removed ammonium nitrogen (N O-N/NH -N) was 2.5% in the SBR system with high heterotrophic activities, while this ratio was in the range from 0.14% to 1.06% in batch nitrification experiments with limited heterotrophic activities.

关键词： biological nutrient removal     denitrification     greenhouse gas     nitrification     nitrous oxide    

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Investigate of in situ sludge reduction in sequencing batch biofilm reactor: Performances, mechanisms

Yonglei Wang, Baozhen Liu, Kefeng Zhang, Yongjian Liu, Xuexin Xu, Junqi Jia

《环境科学与工程前沿（英文）》 2018年 第12卷 第5期 doi: 10.1007/s11783-018-1077-0

摘要：

Microbial metabolism uncoupling, sludge decay is the main mechanism to promote in situ sludge reduction on this biofilm system.

The main reduction mechanism inside the biofilm is sludge decay in the longitudinal distribution of biofilm.

Mizugakiibacter and Azospira anaerobic fermentation bacterium dominate the FSC organisms indicating the dominant mechanism on the biofilm is sludge decay.

The floating spherical carriers with compound of the polyurethane and two fiber balls can effectively blocking suspended sludge, improving Biofilm formation efficiency significantly.

关键词： In situ sludge reduction     Biofilm     Composite floating spherical carriers     Microbial community     SBBR    

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addition of organic carbon sources on nitrous oxide emission in anaerobic-aerobic (low dissolved oxygen) sequencingbatch reactors

Hongjing LI, Xiurong CHEN, Yinguang CHEN

《环境科学与工程前沿（英文）》 2010年 第4卷 第4期   页码 490-499 doi: 10.1007/s11783-010-0248-4

摘要： The effect of additional organic carbon sources on the production of nitrous oxide (N O) in anaerobic-aerobic (low dissolved oxygen) real wastewater treatment system was investigated. In this paper, three laboratory-scale sequencing batch reactors (SBRs) (SBR-1, SBR-2 and SBR-3) were operating under an anaerobic-aerobic (low dissolved oxygen, 0.15–0.45 mg·L ) configuration. The SBRs were ‘long-term cultured’ respectively with a single municipal wastewater sample, sodium acetate, and a waste-activated sludge alkaline fermentation liquid as the additional carbon sources of real wastewater. Off-gas analysis showed that N O was emitted into the atmosphere during the aerobic (low dissolved oxygen) period in the three SBRs, and the order of N O emission rate was SBR-2>SBR-1>SBR-3. It was observed that the higher poly-β-hydroxyvalerate fraction of polyhydroxyalkanoates, the lower glycogen transformation and less nitrite accumulation was in SBR-3, while the opposite behavior was observed in SBR-2. Further research indicated that the interaction of the factors above potentially affected the N O emission in the anaerobic-aerobic (low dissolved oxygen) system.

关键词： anaerobic-aerobic (low dissolved oxygen)     nitrous oxide (N2O) emitting rate     municipal wastewater     waste activated sludge     alkaline fermentation liquid    

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Removal of tetrachlorobisphenol A and the effects on bacterial communities in a hybrid sequencing biofilmbatch reactor-constructed wetland system

Xiaohui Wang, Shuai Du, Tao Ya, Zhiqiang Shen, Jing Dong, Xiaobiao Zhu

《环境科学与工程前沿（英文）》 2019年 第13卷 第1期 doi: 10.1007/s11783-019-1097-4

摘要：

SBBR-CW system was proposed to effectively treat wastewater containing TCBPA.

CW unit contributed more than SBBR to the removal of TCBPA.

TCBPA changed the composition and structure of bacterial community in the system.

GAOs massively grew in SBBR, but did not deteriorate TP removal efficiency.

关键词： SBBR     Constructed wetland     Tetrachlorobisphenol A     Microbial community structure    

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标题 作者 时间 类型 操作

Improvement of nitrification efficiency by bioaugmentation in sequencing batch reactors at low temperature

Di CUI,Ang LI,Tian QIU,Rui CAI,Changlong PANG,Jihua WANG,Jixian YANG,Fang MA,Nanqi REN

期刊论文

Comparative study on microbial community in intermittently aerated sequencing batch reactors (SBR) and

Xiaolin Sheng, Rui Liu, Xiaoyan Song, Lujun Chen, Kawagishi Tomoki

期刊论文

Advanced nitrogen removal by pulsed sequencing batch reactors (SBR) with real-time control

YANG Qing, PENG Yongzhen, YANG Anming, LI Jianfeng, GUO Jianhua

期刊论文

Treatment of swine wastewater in aerobic granular reactors: comparison of different seed granules as

Lin LIU,Qiyu YOU,Valerie GIBSON,Xu HUANG,Shaohua CHEN,Zhilong YE,Chaoxiang LIU

期刊论文

Effects of shear force on formation and properties of anoxic granular sludge in SBR

Xinyan ZHANG, Binbin WANG, Qingqing HAN, Hongmei ZHAO, Dangcong PENG

期刊论文

Simultaneous denitrifying phosphorus accumulation in a sequencing batch reactor

YUAN Linjiang, HAN Wei, WANG Lei, YANG Yongzhe, WANG Zhiying

期刊论文

Nitrifying and denitrifying bacteria in aerobic granules formed in sequencing batch airlift reactors

WANG Fang, YANG Fenglin, QI Aijiu

期刊论文

Effects of La, Ce on nitrogen removal in sequencing batch reactor

Qing XIA , Rui LIANG , Yuning HONG , Lili DING , Hongqiang REN , Yuxiang MAO , Mingyu ZHAO ,

期刊论文

Influence of aeration intensity on the performance of A/O-type sequencing batch MBR system treating azo

Xinhua WANG, Jingmei LI, Xiufen LI, Guocheng DU

期刊论文

Mechanism studies on nitrogen removal when treating ammonium-rich leachate by sequencing batch biofilm

XU Zhengyong, YANG Zhaohui, ZENG Guangming, XIAO Yong, DENG Jiuhua

期刊论文

Process evaluation of an alternating aerobic-anoxic process applied in a sequencing batch reactor for

ZENG Wei, PENG Yongzhen, WANG Shuying

期刊论文

N2O emission from a sequencing batch reactor for biological N and P removal from wastewater

Lei SHEN,Yuntao GUAN,Guangxue WU,Xinmin ZHAN

期刊论文

Investigate of in situ sludge reduction in sequencing batch biofilm reactor: Performances, mechanisms

Yonglei Wang, Baozhen Liu, Kefeng Zhang, Yongjian Liu, Xuexin Xu, Junqi Jia

期刊论文

addition of organic carbon sources on nitrous oxide emission in anaerobic-aerobic (low dissolved oxygen) sequencingbatch reactors

Hongjing LI, Xiurong CHEN, Yinguang CHEN

期刊论文

Removal of tetrachlorobisphenol A and the effects on bacterial communities in a hybrid sequencing biofilmbatch reactor-constructed wetland system

Xiaohui Wang, Shuai Du, Tao Ya, Zhiqiang Shen, Jing Dong, Xiaobiao Zhu

期刊论文