ammonia recovery Articles

  • Electrochemically-assisted ammonia recovery from wastewater using a floating electrode

    This work presents and explores a novel methodology for the removal and recovery of ammonia from wastewater based upon two mechanisms: electrochemical oxidation and a previously unreported electrochemically-assisted surface transfer mechanism. Recovery of ammonia is enabled by placing a porous cathodic electrode at the wastewater-air interface. In this configuration, the cathode creates local ...


    By IWA Publishing

  • Ammonia nitrogen removal and recovery from acetylene purification wastewater by air stripping

    Ammonia nitrogen (NH4-N) contaminated wastewater has posed a great threat to the safety of water resources. In this study, air stripping was employed to remove and recover NH4-N from acetylene purification wastewater (APW) in a polyvinylchloride manufacturing plant. Investigated parameters were initial APW pH, air flow rate, APW temperature and stripping time. The NH4-N ...


    By IWA Publishing

  • 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

  • Life history responses of Daphnia similoides simultaneously exposed to microcystin‐LR and ammonia and their post‐exposure recovery

    Aquatic organisms often suffer episodic stress from cyanobacterial bloom‐derived concomitant and sometimes interactive stressors, and may recover when stressors terminate. To assess whether exposed Daphnia can quickly recover from combined toxicity of bloom‐derived stressors, we exposed Daphnia similoides to mixtures of ammonia (0, 0.37, and 0.58 mg L−1) and dissolved microcystin‐LR (0, 10, ...


    By John Wiley & Sons, Ltd.

  • A novel PSB-EDI system for high ammonia wastewater treatment, biomass production and nitrogen resource recovery: PSB system

    A novel process coupling photosynthetic bacteria (PSB) with electrodeionization (EDI) treatment was proposed to treat high ammonia wastewater and recover bio-resources and nitrogen. The first stage (PSB treatment) was used to degrade organic pollutants and accumulate biomass, while the second stage (EDI) was for nitrogen removal and recovery. The first stage was the focus in this study. The ...


    By IWA Publishing

  • Removal and recovery of N, P and K from urine via ammonia stripping and precipitations of struvite and struvite-K

    This study investigated the recovery of N, P and K from source-separated urine in laboratory-scale combined processes of air stripping and precipitation. Two operation scenarios were carried out to recover N/P (named partial scenario) and N/P/K (named complete scenario). Most of the nutrients were recovered (>70%) by optimising the operation parameters including the increase of air flow ...


    By IWA Publishing

  • Restaurant Grease Protein Recovery

    Food Processing Wastewater Treatment Case Studies Animal & Restaurant Grease Protein Recovery The facility renders animals and restaurant grease as a means to recover protein.  The facility generates wastewater ...


    By Integrated Engineers Inc.

  • Recovery of ammonium from digestate as fertilizer

    Ammonia inhibition can be a major problem during anaerobic digestion of manure and municipal and industrial sludges. Anaerobic digestion is sensitive to higher NH3-N concentrations, which are inhibiting and at certain levels even toxic for methanogen bacteria. The Nijhuis Ammonium Recovery (AECO-NAR) system can solve this problem and removes ammonium from digestate or other substrate for ...


    By IWA Publishing

  • Analysis and optimization of ammonia stripping using multi-fluid model

    Ammonia recovery from anaerobic digestion (AD) is a notably beneficial process for removing excess nitrogen, producing low cost fertilizer and enhancing odor abatement. A process was developed for nutrients recovery by integrating a simple and effective stripping process with AD system. To design, optimize and scale up this system, multi-fluid model was developed to simulate flow, mass transfer ...


    By IWA Publishing

  • Flood recovery project - Case Study

    Greener Waste Technology has been working with a utility company to combat the effects of flooding on a filter bed works. The works in question is low lying and next to a river which recently burst its embankment and flooded the filter beds entirely. The flood distributed large volumes of silt and mud onto the filters blocking the beds and starving the indigenous bacteria population of oxygen ...


    By Greener Waste Technology

  • Oil recovery reduces sewer cleaning

    Doskocil Food Service Company, a division of Foodbrands America, Hutchinson, Kan., produces 2 million pounds of pizza toppings a week. After cooking, the meat toppings are flash-frozen in one of two spiral freezers. Air currents within the freezer carry grease-containing vapors through the ammonia freezer coils, where they adhere and become lodged. Doskocil uses 1,600 gallons of water per hour to ...


    By Oil Skimmers, Inc.

  • Stop metal losses in processes with Sulphide, Cyanide, Ammonia and Pressure Fluctuations

    Abstract Losses of metal are often traced to incorrect pH/ORP signals in floatation, leaching, extraction, electrolysis, and precipitation processes, aggravated by pressure changes. IC Controls a Canadian mining sensor manufacturer developed a new superior pH/ORP sensor that stops metal losses, reduces environmental footprint and contributes to sustainability. The cause of incorrect pH/ORP ...


    By IC Controls Ltd.

  • Small Capacity Sulfur Recovery Units

    Documento sin título ...


    By Merichem Company

  • Nutrient Recovery by Struvite Crystallization Process: Virginia Experience

     ABSTRACT The Hampton Roads Sanitation District's (HRSD), Nansemond Treatment plant (NTP) services the cities of Chesapeake, Portsmouth and Suffolk, Virginia. The plants treated effluent is discharged into the Chesapeake Bay watershed. The NTP was designed as a 30 MGD biological nutrient removal (BNR) plant with seasonal nitrification and utilizes anaerobic digestion for solids ...

  • Modeling Strategy for SBR Recovery after Upset

    The paper presents results of treatability study on wastewater highly contaminated with ammonia (800 mg/l), (phenols (300 mg/l), thiocyanate (210 mg/l), and arsenic up to 11 mg/l. The study was conducted in two sequencing batch reactors (SBRs) using biomass from a coke plant. After two months of acclimatization the biomass was able to remove ammonia to below 1 mg/l and phenols and thiocynate ...

  • Optimization of resource and water recovery from urine

    This study deals with the feasibility and practicality to recover water and nutrients from fresh urine by means of evaporation/condensation. The evaporation process generated two distinct fractions: a condensate and a concentrate. The optimal percentage of evaporation (in volume) was found to be 80%, resulting in optimal condensate quality. Higher percentages of evaporation resulted in a ...


    By IWA Publishing

  • Recovery and Recycling of Chrome Liquors: VHSP Pty Ltd

     VHSP Pty Ltd built its tanning plant in 1987 using the Sirolime process, which delivered significant improvements in environmental performance over conventional processes. The company implemented further cleaner production initiatives relating to recycling of chrome tanning liquors that have achieved annual savings of $314,000 with a payback of 0.4 years. Background ...


  • High-Level Biological Phosphorus Removal Failure and Recovery

    ABSTRACTThe Durham Advanced Waste Treatment Facility AWTF treats wastewater to very low phosphorus levels (median effluent of less than 0.1 mg P/L) using a combination of biological phosphorus removal followed by tertiary treatment with alum. Historically, the biological phosphorus removal process has shown a relatively high level of instability. Testing was done during summer 2005 to determine ...

  • Nutrient recovery from airplane wastewater: composition, treatment and ecotoxicological assay

    For the 2014 World Cup and the 2016 Olympic Games, Brazil has expanded its airport infrastructure. This will lead to an increase in wastewater generation from aircrafts. This wastewater is traditionally taken from the aircrafts and disposed in the public sewage collection system. However, this residual water may have a different composition than the usual sanitary sewage. Therefore, it is ...


    By IWA Publishing

  • Potential of nitrous oxide recovery from an aerobic/oxic/anoxic SBR process

    A single sequencing batch reactor (SBR) with an operating mode of anaerobic/oxic/anoxic (A/O/A) was developed to determine a simpler process to recover nitrous oxide (N2O) from synthetic wastewater containing ammonia and glucose. This SBR system was initiated in A/O mode to implement nitritation (ammonia to nitrite) and then switched to A/O/A mode. Using measurements of the dissolved N2O ...


    By IWA Publishing

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