ammonia removal Articles

  • 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 ...


    By IWA Publishing

  • 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 ...


    By IWA Publishing

  • 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. The ...


    By IWA Publishing

  • 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 ...


    By IWA Publishing

  • 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 ...


    By Cleveland Biotech Ltd.

  • 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 ...


    By Inderscience Publishers

  • 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 ...


    By IWA Publishing

  • 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 ...


    By IWA Publishing

  • 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 ...


    By IWA Publishing

  • 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 ...


    By Bio Systems Europe

  • 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 ...


    By IWA Publishing

  • 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 ...


    By IWA Publishing

  • 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 ...


    By Inderscience Publishers

  • Meihua - Case Study

    Over 90% ammonia removal at food ingredients processing plant Tongliao Meihua Biological Sci-tech Co., Ltd. is a wholly held subsidiary of Hebei Meihua Monosodium Glutamate Group Co., Ltd. Over 18,900 m3/d wastewater with ammonium concentration over 600 mg/l needs to be treated. Probably it is the highest ammonium load in one factory in the world, which means ...


    By Paques Technology B.V.

  • Ammonia Scrubbing Semiconductor Manufacturing 101

    Semiconductor chip manufacturing utilizes a variety of inorganic acids and ammonia solutions. Mixing of acid gases and ammonia in a ventilation system can result in a as phase reaction producing very fine particulate that is ifficult and expensive to remove. For this reason a large emiconductor foundry on the west coast decided topre-treat the exhaust from the ammonia sources prior o mixing with ...

  • Rapid start-up of a nitrifying reactor using aerobic granular sludge as seed sludge

    In this study, the effectiveness of aerobic granular sludge as seed sludge for rapid start-up of nitrifying processes was investigated using a laboratory-scale continuous stirred-tank reactor (CSTR) fed with completely inorganic wastewater which contained a high concentration of ammonia. Even when a large amount of granular biomass was inoculated in the reactor, and the characteristics of ...


    By IWA Publishing

  • 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 ...


    By Inderscience Publishers

  • High-rate nitrification of electronic industry wastewater by using nitrifying granules

    Nitrifying granules have a high sedimentation property and an ability to maintain a large amount of nitrifying bacteria in a reaction tank. Our group has examined the formation process of nitrifying granules and achieved high-rate nitrification for an inorganic synthetic wastewater using these granules. In this research, a pilot-scale test plant with an 850-liter reaction tank was assembled in ...


    By IWA Publishing

  • 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 ...


    By IWA Publishing

  • The removal of ammonia from sanitary landfill leachate using a series of shallow waste stabilization ponds

    This study evaluated the efficiency of a shallow (0.5 m deep) waste stabilization pond series to remove high concentrations of ammonia from sanitary landfill leachate. The pond system was located at EXTRABES, Campina Grande, Paraiba, Northeast Brazil. The pond series was fed with sanitary landfill leachate transported by road tanker to the experimental site from the sanitary landfill of the City ...


    By IWA Publishing

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