ammonia recovery Articles
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Simultaneous regeneration of exhausted zeolite and nitrogen recovery using an air stripping method at alkaline pH
Ammonium nitrogen recovery using natural zeolite from the permeates of anaerobic membrane bioreactors was investigated with batch and continuous experiments. Regeneration of exhausted zeolite was compared between mechanical shaking and air stripping, and experimental results showed the superiority of air stripping over the shaking. Liquid circulation and air flow rates were optimized in a ...
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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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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 ...
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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 ...
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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 removal by air ...
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Swine manure treatment by anaerobic membrane bioreactor with carbon, nitrogen and phosphorus recovery
Swine manure wastewater was treated in an anaerobic membrane bioreactor (AnMBR) that combined a continuous stirred tank reactor (CSTR) and a hollow-fiber ultrafiltration membrane, and the feasibility of ammonia and phosphorus recovery in the permeate was investigated. The AnMBR system was operated steadily with a high mixed liquor suspended solids (MLSS) concentration of 32.32 ± 6.24 g/L for ...
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Coke Manufacturing Industry - Pollution Prevention Guidelines
Introduction Pollution Prevention Guidelines to provide technical advice and guidance to staff and consultants involved in pollution-related projects. The guidelines represent state-of-the-art thinking on how to reduce pollution emissions from the production process. In many cases, the guidelines provide numerical targets for reducing pollution, as well as maximum emissions ...
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What is Industrial Wastewater Treatment - and who needs it?
Every business that makes something on an industrial scale produces wastewater, sometimes at millions of litres daily. All that wastewater must go somewhere, but contamination can make reuse and discharge impossible. The simple solution is industrial wastewater treatment, either on-site or off-site, to transform it into a cleaner product suitable for discharge or reuse. But who needs these ...
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Waste-fed heating and power plant - Wastewater treatment plant for the treatment of flue gas washing water - Case Study
The multi-step process for the treatment of the highly acidic wastewater was designed to remove wastewater constituents as purely as possible from the wastewater. 1st stage: Separation of coal dust and activated carbon powder The acidic wastewater is filtered through a membrane filter press. Before emptying and draining, the filter residue is washed to remove acid residues. A white gypsum can ...
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Integrating anaerobic processes into wastewater treatment
Over the past decade, the concept of anaerobic processes for the treatment of low temperature domestic wastewater has been introduced. This paper uses a developed wastewater flowsheet model and experimental data from several pilot scale studies to establish the impact of integrating anaerobic process into the wastewater flowsheet. The results demonstrate that, by integrating an expanded granular ...
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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, ...
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Becoming A “Water Resource Recovery Facility” Offers Financial Benefit
While the term “Water Resource Recovery Facility” may seem like nothing more than a trendy phrase, the name change represents a distinct shift in the role that wastewater utilities can now play. Wastewater is packed full of resources — nutrients, micronutrients, metals, grit, biopolymers, biosolids, and more — and much of that can be recovered and sold, offering ...
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How do Wastewater Treatment Plants Transform in the Era of Carbon Neutrality?
In November 2019, the Danish government signed a "Danish climate partnership" with 13 business representatives, which basically covers the greenhouse gas emissions of all industries in Denmark. The members of the Climate Partnership need to provide emission reduction recommendations in their respective fields to help the Danish government realize its 2030 commitment-that is, Denmark’s ...
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