Organic carbon and nitrogen removal from a strong wastewater using a denitrifying suspended growth reactor and a horizontal-flow biofilm reactor

2007 ◽  
Vol 98 (4) ◽  
pp. 739-744 ◽  
Author(s):  
L XIAO ◽  
M RODGERS ◽  
J MULQUEEN
Keyword(s):  
Organic Carbon ◽  
Nitrogen Removal ◽  
Biofilm Reactor ◽  
Horizontal Flow ◽  
Carbon And Nitrogen ◽  
Suspended Growth

Modeling dynamics of organic carbon and nitrogen removal during aeration interruption in aerated horizontal flow treatment wetlands

2019 ◽  
Vol 80 (3) ◽  
pp. 597-606 ◽  
Author(s):  
Johannes Boog ◽  
Thomas Kalbacher ◽  
Jaime Nivala ◽  
Manfred van Afferden ◽  
Roland A. Müller
Keyword(s):  
Steady State ◽  
Organic Carbon ◽  
Dynamic Response ◽  
Nitrogen Removal ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Treatment Wetlands ◽  
Horizontal Flow ◽  
Simulation Accuracy ◽  
Carbon And Nitrogen

Abstract Despite recent developments in process-based modeling of treatment wetlands (TW), the dynamic response of horizontal flow (HF) aerated wetlands to interruptions of aeration has not yet been modeled. In this study, the dynamic response of organic carbon and nitrogen removal to interruptions of aeration in an HF aerated wetland was investigated using a recently-developed numerical process-based model. Model calibration and validation were achieved using previously obtained data from pilot-scale experiments. Setting initial concentrations for anaerobic bacteria to high values ( 35–70 mg L−1) and including ammonia sorption was important to simulate the treatment performance of the experimental wetland in transition phases when aeration was switched off and on again. Even though steady-state air flow rate impacted steady-state soluble chemical oxygen demand (CODs), ammonia nitrogen (NH4–N) and oxidized nitrogen (NOx–N) concentration length profiles, it did not substantially affect corresponding effluent concentrations during aeration interruption. When comparing simulated with experimental results, it is most likely that extending the model to include mass transfer through the biofilm will allow to better explain the underlying experiments and to increase simulation accuracy. This study provides insights into the dynamic behavior of HF aerated wetlands and discusses assumptions and limitations of the modeling approach.

The application of moving bed biofilm reactor to denitrification process after trickling filters

2016 ◽  
Vol 74 (12) ◽  
pp. 2909-2916 ◽  
Author(s):  
Lukasz Kopec ◽  
Jakub Drewnowski ◽  
Adam Kopec
Keyword(s):  
Organic Carbon ◽  
Nitrogen Removal ◽  
Carbon Concentration ◽  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Trickling Filters ◽  
Organic Carbon Concentration ◽  
Total Nitrogen Removal ◽  
Denitrification Process

The paper presents research of a prototype moving bed biofilm reactor (MBBR). The device was used for the post-denitrification process and was installed at the end of a technological system consisting of a septic tank and two trickling filters. The concentrations of suspended biomass and biomass attached on the EvU Perl moving bed surface were determined. The impact of the external organic carbon concentration on the denitrification rate and efficiency of total nitrogen removal was also examined. The study showed that the greater part of the biomass was in the suspended form and only 6% of the total biomass was attached to the surface of the moving bed. Abrasion forces between carriers of the moving bed caused the fast stripping of attached microorganisms and formation of flocs. Thanks to immobilization of a small amount of biomass, the MBBR was less prone to leaching of the biomass and the occurrence of scum and swelling sludge. It was revealed that the maximum rate of denitrification was an average of 0.73 gN-NO3/gDM·d (DM: dry matter), and was achieved when the reactor was maintained in external organic carbon concentration exceeding 300 mgO2/dm3 chemical oxygen demand. The reactor proved to be an effective device enabling the increase of total nitrogen removal from 53.5% to 86.0%.

Phosphorus and Nitrogen Removal in Moving-Bed Sequencing Batch Biofilm Reactors

1999 ◽  
Vol 40 (4-5) ◽  
pp. 169-176 ◽  
Author(s):  
Giuseppe Pastorelli ◽  
Roberto Canziani ◽  
Luca Pedrazzi ◽  
Alberto Rozzi
Keyword(s):  
Organic Carbon ◽  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Phosphorus Uptake ◽  
Biofilm Reactor ◽  
Municipal Wastewater Treatment ◽  
Biological Phosphorus Removal ◽  
Nitrogen And Phosphorus ◽  
Limit Values ◽  
Moving Bed

A pilot moving-bed sequencing batch biofilm reactor (MBSBBR) fed with primary settled wastewater, was used in order to study organic carbon, phosphorus and nitrogen removal with and without external carbon sources. Patented KMT® polyethylene biofilm carriers were used. Organic carbon uptake and phosphorus release has been achieved in the anaerobic phase of the cycle, while nitrification, simultaneous denitrification (i.e., anoxic respiration of sequestered COD in the inner layer of the biofilm) and phosphorus uptake was observed in the aerobic phase. A stable biological phosphorus removal could be achieved only with an external carbon source. Since the process proved flexible and reliable, it is suitable for full scale application to municipal wastewater treatment plants (WWTPs), in order to meet EU total nitrogen and phosphorus limit values for discharge into sensitive receiving waters.

Reactive transport modeling of an innovative nature-based solution for domestic sewage treatment

2020 ◽  
Author(s):  
Johannes Boog ◽  
Thomas Kalbacher ◽  
Jaime Nivala ◽  
Manfred van Afferden ◽  
Roland A. Müller
Keyword(s):  
Organic Carbon ◽  
Reactive Transport ◽  
Developed Countries ◽  
Domestic Sewage ◽  
Urban Environments ◽  
Surface Flow ◽  
Aerobic Biodegradation ◽  
Horizontal Flow ◽  
Sustainable Urban Development ◽  
Carbon And Nitrogen

<p>The discharge of inadequately treated sewage is still a worldwide problem that contributes to the deterioration of receiving water bodies. Especially in urban environments of less developed countries this threatens drinking water availability and, therefore, puts human health at risk and impedes sustainable urban development. Aerated treatment wetlands are innovative nature-based solutions that have been successfully applied in treating domestic, municipal and industrial effluents. The advantage of these technologies is their simplicity which translates into low operation and maintenance requirements and robust treatment. Aerated wetlands can be easily integrated into  decentralized water infrastructure to serve the demand of changing and fast-growing urban environments.</p><p>Aerated wetlands mimic natural processes to treat wastewater. Air is injected into these systems to provide an aerobic environment for increased aerobic biodegradation of pollutants. However, quantitative knowledge on how aeration governs oxygen transfer, organic matter and nitrogen removal within aerated wetlands is still insufficient.</p><p>In this study, we developed a reactive transport model for horizontal sub-surface flow aerated wetlands using the open-source multi-physics simulator OpenGeoSys. The model was calibrated and validated by pilot-scale experiments with real domestic sewage including steady-state operation and induced aeration failures. In both cases, the model achieved an acceptable degree of simulation accuracy. Furthermore, the experiments including short—term aeration failure showed that horizontal flow aerated wetlands can fully recover from such operational disruptions.</p><p>We then analyzed several simulation scenarios and found out that increasing aeration alters and shifts water quality gradients for organic carbon and nitrogen downstream. This can, for instance, be exploited to provide specific effluent qualities for different demands in an urban environment such as irrigation or groundwater recharge. We identified that the aeration rate required to provide an efficient and robust treatment efficacy for organic carbon and nitrogen of domestic wastewater is 150–200 L m<sup>2</sup> h<sup>1</sup>. The developed model can be used by researchers and engineers to support the design of horizontal flow aerated wetlands in the context of applications in urban environments. Furthermore, our research highlights the suitability of horizontal flow aerated wetlands as a resilient treatment technology with potential application for water pollution control in urban environments.</p>

Carbon and nitrogen removal using a novel horizontal flow biofilm system

2006 ◽  
Vol 41 (11) ◽  
pp. 2270-2275 ◽  
Author(s):  
Michael Rodgers ◽  
Aoife Lambe ◽  
Liwen Xiao
Keyword(s):  
Nitrogen Removal ◽  
Horizontal Flow ◽  
Carbon And Nitrogen
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