Ammonia Recovery from Industrial Wastewater by TransMembraneChemiSorption

Ulbricht, Martin; Schneider, J.; Stasiak, Maria; Sengupta, Amit

doi:10.1002/cite.201200237

Cited by 48 publications

(32 citation statements)

References 2 publications

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“…Polypropylene (PP) and polytetrafluoroethylene (PTFE) are the most commonly used membranes as they provide good separation to the two phases due to their high hydrophobicity [12]. The driving force of the mass transfer is the difference in NH 3 concentrations in the 2 phases [13]. The (NH 3 ) molecules immediately reacts with the stripping solution on the permeate side of the membrane and forms a non-volatile compound; as such the (NH 3 ) molecule levels on the permeate side is essentially zero [7].…”

Section: Introductionmentioning

confidence: 99%

Pilot Scale Study: First Demonstration of Hydrophobic Membranes for the Removal of Ammonia Molecules from Rendering Condensate Wastewater

Brennan

Briciu-Burghina

Hickey

et al. 2020

IJMS

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Hydrophobic membrane contactors represent a promising solution to the problem of recycling ammoniacal nitrogen (N-NH4) molecules from waste, water or wastewater resources. The process has been shown to work best with wastewater streams that present high N-NH4 concentrations, low buffering capacities and low total suspended solids. The removal of N-NH4 from rendering condensate, produced during heat treatment of waste animal tissue, was assessed in this research using a hydrophobic membrane contactor. This study investigates how the molecular composition of rendering condensate wastewater undergo changes in its chemistry in order to achieve suitability to be treated using hydrophobic membranes and form a suitable product. The main objective was to test the ammonia stripping technology using two types of hydrophobic membrane materials, polypropylene (PP) and polytetrafluoroethylene (PTFE) at pilot scale and carry out: (i) Process modification for NH3 molecule removal and (ii) product characterization from the process. The results demonstrate that PP membranes are not compatible with the condensate waste as it caused wetting. The PTFE membranes showed potential and had a longer lifetime than the PP membranes and removed up to 64% of NH3 molecules from the condensate waste. The product formed contained a 30% concentrated ammonium sulphate salt which has a potential application as a fertilizer. This is the first demonstration of hydrophobic membrane contactors for treatment of condensate wastewater.

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Section: Introductionmentioning

confidence: 99%

Pilot Scale Study: First Demonstration of Hydrophobic Membranes for the Removal of Ammonia Molecules from Rendering Condensate Wastewater

Brennan

Briciu-Burghina

Hickey

et al. 2020

IJMS

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“… 7 − 9 In BESs, this electrical current is produced from the organic matter in wastewater by microorganisms that inhabit the anode surface, 7 while in an ES externally added electric energy is used to drive electrolysis of water. 8 TAN can be recovered from the cathode using an NH 3 stripping process, 8 a hydrophobic gas-permeable membrane, 10 , 11 or crystallization. 12 …”

Section: Introductionmentioning

confidence: 99%

Energy-Efficient Ammonia Recovery in an Up-Scaled Hydrogen Gas Recycling Electrochemical System

Kuntke¹,

Rodrigues²,

Sleutels³

et al. 2018

ACS Sustainable Chem. Eng.

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Nutrient and energy recovery is becoming more important for a sustainable future. Recently, we developed a hydrogen gas recycling electrochemical system (HRES) which combines a cation exchange membrane (CEM) and a gas-permeable hydrophobic membrane for ammonia recovery. This allowed for energy-efficient ammonia recovery, since hydrogen gas produced at the cathode was oxidized at the anode. Here, we successfully up-scaled and optimized this HRES for ammonia recovery. The electrode surface area was increased to 0.04 m2 to treat up to 11.5 L/day (∼46 gN/day) of synthetic urine. The system was operated stably for 108 days at current densities of 20, 50, and 100 A/m2. Compared to our previous prototype, this new cell design reduced the anode overpotential and ionic losses, while the use of an additional membrane reduced the ion transport losses. Overall, this reduced the required energy input from 56.3 kJ/gN (15.6 kW h/kgN) at 50 A/m2 (prototype) to 23.4 kJ/gN (6.5 kW h/kgN) at 100 A/m2 (this work). At 100 A/m2, an average recovery of 58% and a TAN (total ammonia nitrogen) removal rate of 598 gN/(m2 day) were obtained across the CEM. The TAN recovery was limited by TAN transport from the feed to concentrate compartment.

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“…This technology has been successfully demonstrated at scale for a broader range of industrial applications (Ulbricht et al, 2013), but as with two-stage contactors, the final ammonia-acid product is difficult to dispose of and will require tankering. Mcleod and McAdam (2016) therefore introduced an antisolvent into the acid phase which, when combined with the reduction in free energy barrier by the hydrophobic membrane, enabled the recovery of crystalline ammonium sulphate, which reduces waste volume and simplifies product disposal.…”

Section: Mitigation Of Ammonia Inhibition To Anaerobic Digestionmentioning

confidence: 99%

Ammonia inhibition and toxicity in anaerobic digestion: A critical review

Jiang

McAdam

Zhang

et al. 2019

Journal of Water Process Engineering

286

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As a waste management technology which offers environmental benefit and renewable energy production, anaerobic digestion (AD) has become the preferred technology for the treatment of organic waste. However, in such waste streams nitrogen contents are likely to be high. There is prevailing literature evidence suggests that high ammonia concentration especially its free molecular form (NH3), derived from nitrogen content in substrates is the cause of inhibition and sudden failure of the AD process. This paper comprehensively reviews previous knowledge from digestion studies using high nitrogen waste streams as feedstocks and critically analysed the considerable variations in the inhibition/toxicity levels reported for ammonia. Literature evidences suggest methanogens, particularly acetoclastic methanogens are most susceptible to ammonia toxicity, and therefore this review has a particular focus on the mechanism of the 'selective' inhibition to methanogens and the impact of ammonia toxicity to the overall methanogen population in an AD digester. This population change explains in many reported cases that sufficient acclimatisation can significantly alleviate the phenomenon of inhibition and specific requirement of certain trace nutrients. Currently 2 available mitigation strategies for high nitrogen content feedstock digestion are reviewed and discussed in relation to the population change and trace nutrient requirements.

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Ammonia Recovery from Industrial Wastewater by TransMembraneChemiSorption

Cited by 48 publications

References 2 publications

Pilot Scale Study: First Demonstration of Hydrophobic Membranes for the Removal of Ammonia Molecules from Rendering Condensate Wastewater

Pilot Scale Study: First Demonstration of Hydrophobic Membranes for the Removal of Ammonia Molecules from Rendering Condensate Wastewater

Energy-Efficient Ammonia Recovery in an Up-Scaled Hydrogen Gas Recycling Electrochemical System

Ammonia inhibition and toxicity in anaerobic digestion: A critical review

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