ammonia removal Articles
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Electro-thermal treatment optimization of high concentration ammonia nitrogen by gaseous oxidation in liquid phase (GOLP)
This study is focused on optimizing the treatment parameters for high concentration ammonia using gaseous oxidation in liquid phase (GOLP). The conversion of ammonia was achieved electro-thermally over mono-crystalline silicon supported CoOx catalyst. The experimental results demonstrated that factors including the co-anions, pH of the solutions, air flowrate and the current showed apparent ...
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Nitrifying Bacteria - Koi Carp Ammonia Removal
A range of nitrifying bacteria - Nitrosomonas (NS) and Nitrobacter (NB). NS converts Ammonia to Nitrite, NB converts Nitrite to Nitrate. Features: Fermented in-house by CBIO Available in a range of activity levels from 100 to 5000 mg/N/lt/hr Very short shelf-life, therefore fresh stocks always available Can be shipped world-wide at short notice Benefits: The simplest and cheapest ...
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Effect of competing ions and causticization on the ammonia adsorption by a novel poly ligand exchanger (PLE) ammonia adsorption reagent
In this paper, a poly ligand exchanger, Cu(II)-loaded chelating resin named ammonia adsorption reagent (AMAR), bearing the functional group of weak iminodiacetate acid, was prepared to efficiently remove ammonia from solutions. Batch adsorption equilibrium experiments were conducted under a range of conditions. The effects of pH on the removal of ammonia by AMAR were investigated at 25 °C. ...
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Application of PTFE membrane for ammonia removal in a membrane contactor
The feasibility of a membrane contactor system for ammonia removal was studied. The mass transfer coefficient was used to quantitatively compare the effect of various operation conditions on ammonia removal efficiency. Effective removal of ammonia was possible with a Polytetrafluoroethylene (PTFE) membrane contactor system at all tested conditions. Among the various operation parameters, contact ...
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Immobilization of magnesium ammonium phosphate crystals within microchannels for efficient ammonia removal
Magnesium ammonium phosphate was formed in flow-through microchannels of silica monoliths using two different methods to fabricate materials that show efficient ammonia adsorption performance from wastewater with low hydraulic resistance. Magnesium ammonium phosphate crystals in these materials release ammonia when heated at 378 K, yielding primarily magnesium hydrogen phosphate. When this ...
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Electrolytic removal of ammonia from aqueous phase by Pt/Ti anode
This study investigated the mechanism and kinetic modeling of electrolytic degradation of ammonia with Pt/Ti anode. The results show that ammonia oxidation from direct oxidation or indirect oxidation with hydroxyl radicals was slow but can be observed under pH 9 and high initial ammonia concentration of 1,050 mg N L−1. Indirect oxidation with HOCl was the mechanism for the ...
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Municipal Ammonia Removal - Case Study
Honeybrook, PA, meets wintertime ammonia removal targets with 80 BioBloc units The Northwestern Chester County Municipal Authority operates the Honeybrook Wastewater Treatment Plant. With a flow ranging from 400,000 to 800,000 gallons per day, the Authority needed a way to remove ammonia during the coldest part of the year when nitrification becomes sluggish—at best. Running trials and ...
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Linking nitrification characteristic and microbial community structures in integrated fixed film activated sludge reactor by high-throughput sequencing
The primary goal of this study is to investigate ammonia removal, abundance of nitrifying bacteria and microbial community structures in a laboratory-scale integrated fixed film activated sludge (IFAS) reactor. The results of Illumina MiSeq sequencing based on 16S rRNA genes showed Proteobacteria and Bacteroidetes were the dominant phyla in both biofilm and suspended sludge samples in the ...
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Effects of intermittent loading on nitrogen removal in horizontal subsurface flow wetlands
Removal of CBOD5 and nitrogen from septic tank effluent was evaluated in four horizontal subsurface flow (HSSF) wetlands. An intermittently loaded cell was compared to a continuously loaded control cell, with both treatments receiving the same weekly volume. The intermittent cell was rapidly drained and “rested” for 24-hr, then refilled in steps, twice weekly. Two media with different particle ...
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Poultry processing - Ammonia removal case study
Background: A poultry plant in the South of England processes up to 100,000 birds per week. The company operates an Activated Sludge plant followed by a Rotating Biological Contactor the whole system being required to produce effluent ammonia of 20 mg/l. Whilst the treatment plant was able to reach this standard when it was first installed, the success of the company meant that more and more ...
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Real-time PCR quantification of ammonia-oxidising bacteria in aerobic granular sludge and activated sludge influenced by pentachlorophenol
An improved real-time PCR was developed to quantify Ammonia-Oxidising Bacteria (AOB) in aerobic granular sludge and activated sludge influenced by Pentachlorophenol (PCP), which ranged from 0 mg/L to 50 mg/L. With the increase of PCP concentration, there is no obvious variation of AOB quantification (p > 0.05) and COD removal rate in both types of sludge. However, the ammonia nitrogen removal of ...
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Study on the kinetics of NH3 removal from air by Nitrosomonas europaea
In this paper, an attempt has been made to examine the feasibility of wood charcoal as a biofilter medium. The microorganism Nitrosomonas europaea has been utilised to remove ammonia in a continuous reactor. A maximum specific growth rate of 0.0565 h-1 was obtained for N. europaea in anaerobic environment using nitrate as electron acceptor. The slope of the graph between the maximum concentration ...
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A synthetic biofilter media for ammonia (NH3) removal
In this work, a patented biofilter media is used in treating air contaminated with ammonia (NH3). The data shows up to 200 ppm of NH3 can be removed with over 93% removal efficiency at 30 s Empty Bed Residence Time (EBRT). At the start–up conditions, the results also indicated that the humidifier can be utilised for buffering concentration fluctuations. The design correlation developed based on ...
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Ammonia recovery from landfill leachate using hydrophobic membrane contactors
This article aims to evaluate membrane contactors capability to remove and recover ammonia from landfill leachate (LFL). A hydrophobic hollow fiber membrane module was used to achieve such purpose. A sulfuric acid diluted solution was used as extraction solution to speed up ammonia content removal. Several factors that have influence on ammonia removal and recovery capability such as ammonia ...
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Ammonia and phenol removal in an internal-circulate sequencing batch airlift reactor
An internal-circulate sequencing batch airlift reactor (IC-SBAR) has been developed to evaluate the efficiency of phenol and ammonia removal in treating synthetic wastewater. This study examined the effect of operation cycle on this system. Results showed that above 97.0% removal efficiencies of ammonia and phenol were achieved, which indicated that ammonia and phenol removals were not ...
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Nitrogen removal from raw landfill leachate by an algae–bacteria consortium
A remediation system for the removal of nitrogen from landfill leachate by a mixed algae–bacteria culture was investigated. This system was designed to treat leachate with minimal inputs and maintenance requirements, and was operated as an open semi-batch reactor in an urban greenhouse. The results of this study showed a maximum nitrogen removal rate of 9.18 mg N/(L·day) and maximum biomass ...
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Performance of permeable media rotating reactors used for pretreatment of wastewaters
The impact of organic loading rate (OLR) on carbonaceous materials and ammonia removal was assessed in bench scale rotating media biofilm reactors treating real wastewater. Media composition influences biofilm structure and therefore performance. Here, plastic mesh, reticulated coarse foam and fine foam media were operated concurrently at OLRs of 15, 35 and 60 g sCOD m−2d−1 in ...
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Gresham Wisconsin Bio-Dome Pilot Study 2010
This article explores the results obtained from a mobile pilot unit in Gresham Wisconsin during the winter of 2010. The pilot unit was installed to October 2010 and ran through April of 2011. During the course of the study, the Bio-Dome was tested under various loading conditions and operating conditions. Samples were taken for both the influent and effluent of the lagoon. Samples were ...
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Municipal landfill leachate treatment by SBBGR technology
The paper reports the results of a laboratory-scale investigation aimed at evaluating the performance of a periodic biofilter with granular biomass (SBBGR) for treating leachate coming from a mature municipal landfill. The results show that the SBBGR was able to remove roughly 80% of COD in leachate. The remaining 20% of COD were, therefore, presumably owing to the presence in the leachate of ...
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Application of advanced Respirometry in the Nitrification assessment for different levels of Temperature, pH and Oxygen
For a determined substrate concentration, the most significant environmental factors are temperature, pH and oxygen availability. The well known critical influence of those factors on the nitrification are here analyzed by making use of a specific software and advanced respirometry based on a dynamic LFS system, where the test conditions can be set in the corresponding test-settings board and ...
By SURCIS, S.L.
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