scholarly journals Stuydy on sequencing batch moving bed membrane bioreactor technology (SBMBMBR) for the removal of organic and total nitrogen in tannery wastewater

2014 ◽  
Vol 17 (2) ◽  
pp. 69-79
Author(s):  
Linh Van Tran ◽  
Phuoc Van Nguyen ◽  
Phuong Thi Thanh Nguyen
Keyword(s):  
Removal Efficiency ◽  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Loading Rate ◽  
Nitrogen Loading ◽  
Cod Removal ◽  
Tannery Wastewater ◽  
Moving Bed ◽  
Cod Removal Efficiency

The SBMBMBR technology (sequencing batch moving bed membrane bioreactor), a combiantion of membrane filtration MF process in activated sludge with sequencing batch (SBR) moving bed using Anox Kaldnes K2 (MBBR), has been studied for the removal of organic and total nitrogen in tannery wastewater. After 170 days, reasearch results showed that the COD removal efficiency was ranged from 89,2±0,6 to 95,9±0,3% when the organic loading rate changed from 0,564±0,019 to 1.207±99 kgCOD/m3/day. The total nitrogen removal efficiency reached 30,0±4,9 to 65,9±13,3. The highest COD removal efficiency was 0,72±0,02 kgCOD/m3/day. The lowest nitrogen removal efficiency was 10,8±5,4% at 0,327±0,020 kgTN/m3/day of nitrogen loading rate. During the research, the adhensional tension of microorganism was insignificant. The biomass remained unchanged with 6.808±226 mg/L of Mixed liquor suspended solids (MLSS). When the salinity went up from 3.500 to 8.000 mgCl/l, the COD and nitrogen removal efficiency decreased. However, the conversion of nitrogen was improved and the recovery of biomass following the changed loading rate was quite fast.

A membrane bioreactor for an innovative biological nitrogen removal process

2010 ◽  
Vol 61 (3) ◽  
pp. 671-676 ◽  
Author(s):  
W. Chen ◽  
F. Y. Sun ◽  
X. M. Wang ◽  
X. Y. Li
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Loading Rate ◽  
Nitrogen Loading ◽  
Synthetic Wastewater ◽  
Biological Nitrogen Removal ◽  
Laboratory System ◽  
Working Volume ◽  
Biological Nitrogen

A hybrid system has been developed for biological nitrogen removal through nitrification-denitrification. The system includes an aerobic tank and an anoxic tank with an intermediate sludge settler connected to a membrane bioreactor (MBR) with a submerged 0.4 μm hollow-fiber membrane module. The laboratory system has a total working volume of 6.5 L treating a glucose-based synthetic wastewater. The experimental results demonstrate that the new process is highly effective for simultaneous organic and nitrogen removal. During the stationary operation, a sludge SS (suspended solids) concentration of 6 g/L or higher can be maintained in the reactors. The system has a COD (chemical oxygen demand) loading rate of up to 2,100 mg/L-d and a total nitrogen loading rate of up to 170 mg N/L-d. More than 95% COD can be degraded, and the total nitrogen removal efficiency can be 90% or higher as the nitrogen is reduced from 100 to around 7.5 mg/L. A high quality effluent is produced with a SS of less than 1 mg/L. With the MBR, organic degradation, nitrogen removal and sludge-liquid separation can be well achieved within a short HRT of about 10 hr.

Combined organic carbon and complete nitrogen removal using anaerobic and aerobic upflow filters

1994 ◽  
Vol 30 (12) ◽  
pp. 297-306 ◽  
Author(s):  
Joseph Akunna ◽  
Claude Bizeau ◽  
René Moletta ◽  
Nicolas Bernet ◽  
Alain Héduit
Keyword(s):  
Organic Carbon ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Nitrogen Loss ◽  
Ammonia Nitrogen ◽  
Cod Removal ◽  
Cod Removal Efficiency ◽  
Treated Effluent ◽  
Treated Effluents ◽  
Aerobic And Anaerobic

Two laboratory upflow aerobic and anaerobic filters fed with synthetic wastewaters were used to study firstly the effects of aeration rate on the nitrification of anaerobically pre-treated effluents and secondly the effects of recycle-to-influent ratios on methane production rate, denitrification and nitrification performances of a combined aerobic and anaerobic wastewater treatment process. Nitrification of anaerobically pre-treated effluent was accompanied by aerobic post-treatment for residual COD removal. A comparison of nitrification performances using autotrophic medium and anaerobically pre-treated effluents (containing 1203 mg COD 1−1) with the same ammonia nitrogen concentration of about 300 mg NH4-N 1−1 showed that 3% of added ammonia nitrogen was assimilated by autotrophic nitrifiers during nitrification of the autotrophic medium while up to 30% was assimilated by both nitrifiers and heterotrophs during organic carbon removal and nitrification of anaerobically pre-treated effluent. Furthermore, it was suspected that significant nitrogen loss through denitrification occured in the aerobic filter especially at low aeration rates. In the study of the combined aerobic-anaerobic system, maximum ammonia nitrogen removal of 70% through denitrification was obtained at recycle-to-influent ratios of 4 and 5. COD removal efficiency in the anaerobic filter decreased from 77 to 60% for recycle-to-influent ratios of zero to 5. Overall COD removal efficiency of the entire system was constant at about 99% due to heterotrophic COD removal in the aerobic filter.

Biological wastewater treatment for removal of polymeric resins in UASB reactor: influence of oxygen

2008 ◽  
Vol 57 (7) ◽  
pp. 1047-1052 ◽  
Author(s):  
U. Durán ◽  
O. Monroy ◽  
J. Gómez ◽  
F. Ramírez
Keyword(s):  
Acrylic Acid ◽  
Vinyl Acetate ◽  
Removal Efficiency ◽  
Loading Rate ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Uasb Reactor ◽  
Cod Removal Efficiency ◽  
Consumption Rates ◽  
Polymeric Resins

The biological elimination of polymeric resins compounds (PRC) such as acrylic acid and their esters, vinyl acetate and styrene under methanogenic and oxygen-limited methanogenesis conditions was evaluated. Two UASB reactors (A and B) were used and the removal of the organic matter was studied in four stages. Reactor A was used as methanogenic control during the study. Initially both reactors were operated under methanogenic conditions. From the second stage reactor B was fed with 0.6 and 1 mg/L·d of oxygen (O2). Reactor A had diminution in chemical oxygen demand (COD) removal efficiency from 75±4% to 37±5%, by the increase of PRC loading rate from 750 to 1125 mg COD/L·d. In this reactor there was no styrene elimination. In reactor B the COD removal efficiency was between 73±5% and 80±2%, even with the addition of O2 and increase of the PRC loading rate, owing to oxygen being used in the partial oxidation of these compounds. In this reactor the yields were modified from 0.56 to 0.40 for CH4 and from 0.31 to 0.60 for CO2. The O2 in low concentrations increased 40.7% the consumption rates of acrylic acid, methyl acrylate and vinyl acetate, allowing styrene consumption with a rate of 0.103 g/L·d. Batch cultures demonstrated that under methanogenic and oxygen-limited methanogenesis conditions, the glucose was not used as an electron acceptor in the elimination of PRC.

scholarly journals Autotrophic ammonia removal from landfill leachate using anaerobic membrane bioreactor

2017 ◽  
Author(s):  
S. Suneethi ◽  
Kurian Joseph
Keyword(s):  
Nitrogen Removal ◽  
Landfill Leachate ◽  
Membrane Bioreactor ◽  
Loading Rate ◽  
Ammonia Removal ◽  
Nitrogen Loading ◽  
Ammonium Oxidation ◽  
Anaerobic Membrane Bioreactor ◽  
N Removal ◽  
Anammox Process

Anaerobic Membrane Bioreactor (AnMBR) is an innovative high cell density system having complete biomass retention, high reactor loading and low sludge production and suitable for developing slow growing autotrophic bacterial cultures such as ANAMMOX. The Anaerobic Ammonium Oxidation (ANAMMOX) process is an advanced biological nitrogen removal removes ammonia using nitrite as the electron acceptor without oxygen. The NH4+-N in the landfill leachate that is formed due to the release of nitrogen from municipal solid waste (MSW), when discharged untreated, into the surface water can result in eutrophication, aquatic toxicity and emissions of nitrous oxide (N2O) to atmosphere. Besides, NH4+-N accumulation in landfills poses long term pollution issue with significant interference during post closure thereby requiring its removal prior to ultimate disposal into inland surface waters. The main objective of this study was to investigate the feasibility and treatment efficiency of treating landfill leachate (to check) for removing NH4+-N by adopting ANAMMOX process in AnMBR. The AnMBR was optimized for Nitrogen Loading Rate (NLR) varying from 0.025 to 5 kg NH4+-N/ m3/ d with hydraulic retention time (HRT) ranging from 1 to 3 d. NH4+-N removal efficacy of 85.13 ± 9.67% with the mean nitrogen removal rate (NRR) of 5.54 ± 0.63 kg NH4+-N/ m3/ d was achieved with nitrogen loading rate (NLR) of 6.51 ± 0.20 kg NH4+- N/ m3/ d at 1.5 d HRT. The nitrogen transformation intermediates in the form of hydrazine (N2H4) and hydroxylamine (NH2OH) were 0.008 ± 0.005 mg/L and 0.006 ± 0.001 mg/L, respectively, indicating co-existence of aerobic ammonia oxidizers (AOB) and ANAMMOX. The free ammonia (NH3) and free nitrous acid (HNO2) concentrations were 26.61 ± 16.54 mg/L and (1.66 ± 0.95) x 10-5 mg/L, preventing NO2--N oxidation to NO3--N enabling sustained NH4+- N removal.

A submerged tubular ceramic membrane bioreactor for high strength wastewater treatment

2003 ◽  
Vol 47 (1) ◽  
pp. 105-111 ◽  
Author(s):  
D.D. Sun ◽  
J.L. Zeng ◽  
J.H. Tay
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Retention Time ◽  
Membrane Bioreactor ◽  
Ceramic Membrane ◽  
Treatment Plant ◽  
High Strength ◽  
Cod Removal ◽  
Utilization Rate ◽  
Cod Removal Efficiency

A 4 L submerged tubular ceramic membrane bioreactor (MBR) was applied in laboratory scale to treat 2,400 mg-COD/L high strength wastewater. A prolonged sludge retention time (SRT) of 200 day, in contrast to the conventional SRT of 5 to 15 days, was explored in this study, aiming to reduce substantially the amount of disposed sludge. The MBR system was operated for a period of 142 days in four runs, differentiated by specific oxygen utilization rate (SOUR) and hydraulic retention time (HRT). It was found that the MBR system produced more than 99% of suspended solid reduction. Mixed liquor suspended solids (MLSS) was found to be adversely proportional to HRT, and in general higher than the value from a conventional wastewater treatment plant. A chemical oxygen demand (COD) removal efficiency was achieved as high as 98% in Run 1, when SOUR was in the range of 100-200 mg-O/g-MLVSS/hr. Unexpectedly, the COD removal efficiency in Run 2 to 4 was higher than 92%, on average, where higher HRT and abnormally low SOUR of 20-30 mg-O/g-MLVSS/hr prevailed. It was noted that the ceramic membrane presented a significant soluble nutrient rejection when the microbial metabolism of biological treatment broke down.

Anaerobic degradation of carbon capture reclaimer MEA waste

2013 ◽  
Vol 67 (11) ◽  
pp. 2549-2559 ◽  
Author(s):  
S. Wang ◽  
J. Hovland ◽  
R. Bakke
Keyword(s):  
Removal Efficiency ◽  
Carbon Capture ◽  
Loading Rate ◽  
Nitrogen Concentration ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Cod Removal ◽  
Methane Yield ◽  
Organic Loading Rate ◽  
Cod Removal Efficiency

The anaerobic biodegradation of reclaimer MEA (monoethanolamine) waste (MEAw) with easily degradable co-substrates was investigated in a laboratory-scale bioreactor at room temperature during a 160 d experimental run. The reactor that was constructed with three phases to facilitate attached biofilm and suspended biomass retention for degradation of the complex and challenging MEAw performed well. A feed strategy of step-wise increasing organic loading rate (OLR) by either increasing feed MEAw concentration or the hydraulic loading rate was applied. The system performance was evaluated by chemical oxygen demand (COD) removal efficiency, methane yield, MEA removal, and the accumulation of ammonia and volatile fatty acid (VFA). The total COD removal efficiency initially was 93% when the feed was mainly easily degradable co-substrate. The total removal dropped to 75% at the end when MEAw constituted 60% of the feed COD. Ion chromatography results show that the MEA and some unidentified feed chemicals were almost completely consumed. The main products of MEAw degradation were ammonia, VFAs and biogas. The ammonia nitrogen concentration reached about 2.0 g/L, which may explain the observed inhibition of acetoclastic methanogenesis leading to acetate accumulation. Methane accounted for up to 80% of the biogas generated. The highest methane yield was 0.34 L/g-COD while the yield was 0.16 L/g-COD at the highest load. This study shows that more than 80% reclaimer MEAw COD degradation with a co-substrate can be maintained in a hybrid anaerobic bioreactor operated in a wide loading range.

Biological nitrogen removal from plating wastewater by submerged membrane bioreactor packed with granular sulfur

2016 ◽  
Vol 74 (4) ◽  
pp. 805-815 ◽  
Author(s):  
Jinyoung Moon ◽  
Yongwoo Hwang ◽  
Junbeum Kim ◽  
Inho Kwak
Keyword(s):  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Loading Rate ◽  
Nitrogen Loading ◽  
High Rate ◽  
Advanced Treatment ◽  
Submerged Membrane Bioreactor ◽  
Treatment Facilities ◽  
Biological Nitrogen ◽  
Plating Wastewater

Recent toughened water quality standards have necessitated improvements for existing sewer treatment facilities through advanced treatment processes. Therefore, an advanced treatment process that can be installed through simple modification of existing sewer treatment facilities needs to be developed. In this study, a new submerged membrane bioreactor process packed with granular sulfur (MBR-GS) was developed and operated to determine the biological nitrogen removal behaviors of plating wastewater containing a high concentration of NO3−. Continuous denitrification was carried out at various nitrogen loading rates at 20 °C using synthetic wastewater, which was comprised of NO3− and HCO3−, and actual plating wastewater, which was collected from the effluent water of a plating company called ‘H Metals’. High-rate denitrification in synthetic plating wastewater was accomplished at 0.8 kg NO3−-N/m3·day at a nitrogen loading rate of 0.9 kg NO3−-N/m3·day. The denitrification rate further increased in actual plating wastewater to 0.91 kg NO3−-N/m3·day at a nitrogen loading rate of 1.11 kg NO3−-N/m3·day. Continuous filtration was maintained for up to 30 days without chemical cleaning with a transmembrane pressure in the range of 20 cmHg. Based on stoichiometry, SO42− production and alkalinity consumption could be calculated theoretically. Experimental alkalinity consumption was lower than the theoretical value. This newly proposed MBR-GS process, capable of high-rate nitrogen removal by compulsive flux, is expected to be applicable as an alternative renovation technique for nitrogen treatment of plating wastewater as well as municipal wastewater with a low C/N ratio.

Nitrogen removal from reject water with primary sludge as denitrification carbon source

2010 ◽  
Vol 61 (12) ◽  
pp. 2965-2972 ◽  
Author(s):  
L. Zhang ◽  
S. J. Zhang ◽  
J. Zhou ◽  
S. Y. Wang ◽  
Y. P. Gan ◽  
...  
Keyword(s):  
Carbon Source ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Loading Rate ◽  
Suspended Solid ◽  
Nitrogen Loading ◽  
Solid Retention Time ◽  
Primary Sludge ◽  
Reject Water ◽  
Denitrification Reactor

A novel system was used for nitrogen removal from reject water. This system includes one anoxic/oxic reactor for nitrification and a special reactor for denitrification in which primary sludge was added intermittently as electron donor. In denitrification reactor, sludge fermentation and denitrification reaction took place simultaneously and promoted each other. It was found that effluent recycle could improve nitrogen removal efficiency due to reclaiming of alkalinity. Under steady state conditions, the average solid retention time (SRT) in denitrification reactor was 12–15 d, a total nitrogen loading rate was 0.2 kg N/(m3 day) and TN removal efficiency was more than 90% without extra carbon source addition. Primary sludge was degraded so that volatile suspended solid (VSS) decreased by 50%. Further investigation showed that ORP could be taken as a control parameter for sludge addition.

Study of Printing and Dyeing Wastewater Treatment by Membrane Bioreactor Enhanced by Bio-Ferric

2011 ◽  
Vol 183-185 ◽  
pp. 1456-1461 ◽  
Author(s):  
Shi Feng Ji ◽  
Chun Mei Gao ◽  
Hong Yang ◽  
Ming Chu ◽  
Chun Feng Wang
Keyword(s):  
Removal Efficiency ◽  
Membrane Bioreactor ◽  
Ferric Hydroxide ◽  
Cod Removal ◽  
Printing And Dyeing Wastewater ◽  
Sludge Flocs ◽  
Cod Removal Efficiency ◽  
N Removal ◽  
Sludge Minimization ◽  
Better Than

Bio-ferric membrane bioreactor(MBR) was made through adding ferric hydroxide to traditional MBR and forming bio-ferric sludge. Through analyzing treatment efficiency of dyeing and printing wastewater in bio-ferric MBR and traditional MBR respectively, the results showed: COD removal efficiency in bio-ferric MBR was more better than that in traditional MBR which increased 10% or so, but the influence of HRT on COD removal efficiency wasn’t evident; Via changing SRT, it was obtained: bio-ferric MBR could operate in longer SRT while treatment effect couldn’t be impacted that could discharge less sludge than traditional MBR which coule get sludge minimization; bio-ferric sludge flocs could provide better survival environment for nitrobacteria that made NH3-N removal efficiency stable. The experiment illuminated: the biochemical and physical function of bio-ferric sludge could strengthen the holistic stability of the system.

Evaluation of UASB Reactor Performance During Start-Up Operation Using Glucose Bearing Synthetic Wastewater

2020 ◽  
Vol 9 (1) ◽  
pp. 32-51
Author(s):  
Revanuru Subramanyam
Keyword(s):  
Removal Efficiency ◽  
Loading Rate ◽  
Granular Sludge ◽  
Cod Removal ◽  
Synthetic Wastewater ◽  
Organic Loading Rate ◽  
Anaerobic Sludge ◽  
Cod Removal Efficiency ◽  
Start Up ◽  
Seed Sludge

This research article describes start-up performance of an UASB (Upflow Anaerobic Sludge Blanket) reactor in terms of chemical oxygen demand (COD) removal efficiency, biogas production, sludge loading rate (SLR), volatile fatty acids (VFA), pH, alkalinity, total solids (TS) and volatile suspended solids (VSS), fed with synthetic wastewater with increased concentrations of glucose. The reactor was loaded up to an OLR (Organic Loading Rate) of 15 kg COD m-3 d-1 and achieved a COD removal efficiency of 82 ±3%. The results showed that digested seed sludge was successfully acclimatized and transformed finally into granular sludge within a period of 120 days. An increase in the accumulation of VFA at high OLRs showed that methanogenesis could be the rate-limiting step in the reactor operation. The SLR and VSS/TS ratio were increased with an increase in OLR. During the initial stages, uniform distribution of VSS concentration and later on maximum VSS concentration were found at port number two at a height of 350 mm. The carbon balance depicts that the maximum percentage of influent COD converted to methane COD. An increase in specific methanogenic activity values with the age of sludge confirmed the transformation of the seed sludge in to a granular sludge.

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