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.

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.

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.

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.

scholarly journals Effect of cycle run time of backwash and relaxation on membrane fouling removal in submerged membrane bioreactor treating sewage at higher flux

2017 ◽  
Vol 76 (4) ◽  
pp. 963-975 ◽  
Author(s):  
Shamas Tabraiz ◽  
Sajjad Haydar ◽  
Paul Sallis ◽  
Sadia Nasreen ◽  
Qaisar Mahmood ◽  
...  
Keyword(s):  
Cycle Time ◽  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Operation Time ◽  
High Rate ◽  
High Flux ◽  
Submerged Membrane Bioreactor ◽  
Time Ratio ◽  
Effective Operation ◽  
Run Time

Intermittent backwashing and relaxation are mandatory in the membrane bioreactor (MBR) for its effective operation. The objective of the current study was to evaluate the effects of run-relaxation and run-backwash cycle time on fouling rates. Furthermore, comparison of the effects of backwashing and relaxation on the fouling behavior of membrane in high rate submerged MBR. The study was carried out on a laboratory scale MBR at high flux (30 L/m2·h), treating sewage. The MBR was operated at three relaxation operational scenarios by keeping the run time to relaxation time ratio constant. Similarly, the MBR was operated at three backwashing operational scenarios by keeping the run time to backwashing time ratio constant. The results revealed that the provision of relaxation or backwashing at small intervals prolonged the MBR operation by reducing fouling rates. The cake and pores fouling rates in backwashing scenarios were far less as compared to the relaxation scenarios, which proved backwashing a better option as compared to relaxation. The operation time of backwashing scenario (lowest cycle time) was 64.6% and 21.1% more as compared to continuous scenario and relaxation scenario (lowest cycle time), respectively. Increase in cycle time increased removal efficiencies insignificantly, in both scenarios of relaxation and backwashing.

scholarly journals Discrepant membrane fouling of partial nitrification and anammox membrane bioreactor operated at the same nitrogen loading rate

2016 ◽  
Vol 214 ◽  
pp. 729-736 ◽  
Author(s):  
Zhao Niu ◽  
Zuotao Zhang ◽  
Sitong Liu ◽  
Taro Miyoshi ◽  
Hideo Matsuyama ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Loading Rate ◽  
Nitrogen Loading ◽  
Partial Nitrification

Effect of nitrogen loading on the nitrogen removal performance in membrane bioreactor coupled with elemental sulfur-based carriers

2020 ◽  
Vol 205 ◽  
pp. 124-130
Author(s):  
Thi-Kim-Quyen Vo ◽  
Soyeon Kang ◽  
Jeong-Eun Lee ◽  
Sun-A An ◽  
Ahyoung Jeong ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Elemental Sulfur ◽  
Nitrogen Loading

Anammox process for nitrogen removal from anaerobically digested fish canning effluents

2006 ◽  
Vol 53 (12) ◽  
pp. 265-274 ◽  
Author(s):  
A. Dapena-Mora ◽  
J.L. Campos ◽  
A. Mosquera-Corral ◽  
R. Méndez
Keyword(s):  
Nitrogen Removal ◽  
Bacterial Population ◽  
Loading Rate ◽  
Population Distribution ◽  
Nitrogen Loading ◽  
Fish Analysis ◽  
Organic Carbon Content ◽  
High Nitrogen ◽  
N Concentration ◽  
Anammox Process

The Anammox process was used to treat the effluent generated in an anaerobic digester which treated the wastewater from a fish cannery once previously processed in a Sharon reactor. The effluents generated from the anaerobic digestion are characterised by their high ammonium content (700–1,000 g NH+4-N m−3), organic carbon content (1,000–1,300 g TOC m−3) and salinity up to 8,000–10,000 g NaCl m−3. In the Sharon reactor, approximately 50% of the NH+4-N was oxidised to NO−2-N via partial nitrification. The effluent of the Sharon step was fed to the Anammox reactor which treated an averaged nitrogen loading rate of 500 g N m−3· d−1. The system reached an averaged nitrogen removal efficiency of 68%, mainly limited due to the nonstoichiometric relation, for the Anammox process, between the ammonium and nitrite added in the feeding. The Anammox reactor bacterial population distribution, followed by FISH analysis and batch activity assays, did not change significantly despite the continuous entrance to the system of aerobic ammonium oxidisers coming from the Sharon reactor. Most of the bacteria corresponded to the Anammox population and the rest with slight variable shares to the ammonia oxidisers. The Anammox reactor showed an unexpected robustness despite the continuous variations in the influent composition regarding ammonium and nitrite concentrations. Only in the period when NO−2-N concentration was higher than the NH+4-N concentration did the process destabilise and it took 14 days until the nitrogen removal percentage decreased to 34% with concentrations in the effluent of 340 g NH+4-N m−3 and 440 g NO−2-N m−3, respectively. Based on these results, it seems that the Sharon–Anammox system can be applied for the treatment of industrial wastewaters with high nitrogen load and salt concentration with an appropriate control of the NO−2-N/NH+4-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.

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