Valorization of ammonia concentrates from treated urban wastewater using liquid–liquid membrane contactors

Bernal, Edxon Eduardo Licón; Maya, Carmen; Valderrama, César; Cortina, José Luis

doi:10.1016/j.cej.2016.05.094

Cited by 62 publications

(21 citation statements)

References 26 publications

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“…2 BYK Additives Ltd, Moorfield Road, Widnes, Cheshire WA8 3AA, UK. * email: a.soares@cranfield.ac.uk Currently, the most used ion exchange media for ammonium removal is the natural zeolite clinoptilolite (in the activated Na-form) which has been showed to have ammonium exchange capacity of up to 19 g NH 4 + -N/ kg media (1.1 meq NH 4 + -N/g media) when treating domestic wastewater with initial concentration of 27 mg NH 4 + -N/L (1.5 meq NH 4 + -N/L) and pH 7.7 12 . Zeolites are well known crystalline aluminosilicate minerals found in nature containing a framework of [SiO 4 ] 4− and [AlO 4 ] 5− tetrahedra linked by their corners through oxygen atoms.…”

Section: Openmentioning

confidence: 99%

“…These regulations require that the effluent of wastewater treatment plants have an ammonium concentration as low as 1 mg NH 4 + -N/L and maximum 30 and 50 mg NO 3 – N/L for nitrate discharge in freshwater and seawater, respectively 1 – 3 . Conventional methods to decrease ammonium concentration from wastewater, such as biological nitrification–denitrification 4 , present limitations obtaining such a low total nitrogen concentrations and environmental concerns due to the production of greenhouse gases 5 . The use of ion exchange (IEX) systems for the selective removal of ammonium from wastewater is becoming increasingly attractive due to its high removal efficiency, low greenhouse gas emissions, competitive cost, and relative simplicity of operation 6 .…”

Section: Introductionmentioning

confidence: 99%

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Preparation and evaluation of zeolites for ammonium removal from municipal wastewater through ion exchange process

Guida

Potter²,

Jefferson

et al. 2020

Sci Rep

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the application of ion exchange process for ammonium (nH 4 +-n) removal from wastewater is limited due to the lack of suppliers of engineered zeolites which present high ammonium exchange capacity (Aec) and mechanical strength. this study focuses on the preparation and evaluation of synthetic zeolites (Zeolite1-6) by measuring AEC and resistance to attrition and compression, against natural (clinoptilolite) and engineered zeolite (reference, Zeolite-n). At high nH 4 +-N concentrations, Zeolite6 and Zeolite2 showed capacities of 4.7 and 4.5 meq NH 4 +-N/g media, respectively. In secondary effluent wastewater (initial nH 4 +-N of 0.7 meq NH 4 +-N/L), Zeolite1, 2 and 6 showed an AEC of 0.05 meq NH 4 +-N/g media, similar to Zeolite-N (0.06 meq NH 4 +-N /g media). Among the synthetic zeolites, Zeolite3 and 6 showed higher resistance to attrition (disintegration rate = 2.7, 4.1 NTU/h, respectively) when compared with Zeolite-N (disintegration rate = 13.2 NTU/h). Zeolite4 and 6 showed higher resistance to compression (11 N and 6 N, respectively). Due its properties, Zeolite6 was further tested in an ion exchange demonstration scale plant treating secondary effluent from a municipal wastewater treatment plant. However, Zeolite6 disintegrated after 2 months of operation, whilst Zeolite-N remained stable for 1.5 year. This highlighted the importance of the zeolite's mechanical strength for successful application. in particular, future work should focus on the optimization of the zeolite production process (temperature, time and dimension of the kiln during calcination) to obtain an engineered zeolite with a spherical shape thus reducing eventual sharp edges which can affect mechanical strength.

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Section: Openmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and evaluation of zeolites for ammonium removal from municipal wastewater through ion exchange process

Guida

Potter²,

Jefferson

et al. 2020

Sci Rep

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“…In single OD process, the effect of the solution pH for the feed and the acid chamber on the migration of NH 3 in OD was investigated (Figure b). Lowest flux or slowest migration of NH 3 is found when the solution pH is 10 and 2 for the feed and acid respectively (normalized NH 3 quantity migrated <0.01% within 1 h, Figure b) where the mass transfer coefficient (slope from SI Figure S4a) is also the lowest in line with eq . Then, decreasing the pH of acid solution from 2 to 1 (i.e., increasing proton concentration from 10 to 100 mM) slightly improves NH 3 transfer.…”

Section: Results and Discussionmentioning

confidence: 70%

“…Previous studies have extensively reported the ammonia transfer across GM, illustrating that the ammonia flux depends mainly on the partial pressure gradient between the feed and acid as follows. , Where k m(NH 3 ) is the ammonia mass transfer coefficient (m s –1 ), p NH 3, f , and p NH 3, a are the ammonia partial pressures (atm) of the feed and the acid stream, respectively. R is the ideal gas constant (0.082 atm·m 3 kmol –1 K –1 ) and T is the temperature of the system (K).…”

Section: Methodsmentioning

confidence: 99%

Donnan Dialysis-Osmotic Distillation (DD-OD) Hybrid Process for Selective Ammonium Recovery Driven by Waste Alkali

Chen

Han

Yao

et al. 2021

Environ. Sci. Technol.

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This work proposed an innovative and energy-efficient Donnan Dialysis (DD) and Osmotic Distillation (OD) hybrid process for alkali-driven ammonium recovery from wastewater. The efficiency and feasibility of ammonium removal and recovery from synthetic and real wastewater using NaOH and waste alkali were investigated. Ammonium in the feed first transported across the cation exchange membrane and accumulated in the receiver chamber. It is then deprotonated as ammonia, passing through the gas permeable membrane and finally is fixed as ammonium salt in the acid chamber. Our results indicated that employing waste alkali (red mud leachate) as driving solution led to excellent ammonium recovery performances (recovery efficiency of >80%), comparable to those of NaOH solution. When the initial ammonium concentration was 5 and 50 mM, the waste alkali driven DD-OD process achieved acceptable NH4 +-N flux density of 16.8 and 169 g N m–2 d–1, at energy cost as low as 8.38 and 2.06 kWh kg–1 N, respectively. Since this alkali driven DD-OD hybrid process is based on solute concentration (or partial pressure) gradient, it could be an energy-effective technology capable of treating wastewaters containing ammonium using waste alkali to realize nutrients recovery in a sustainable manner.

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“…Licon Bernal et al (2016) and Sancho et al (2017) studied the applicability of hollow-fibre membrane contactors for the removal and recovery of ammonium from a synthetic regenerant solution, which was used as a surrogate for the liquid phase produced during the regeneration of loaded zeolites being applied in tertiary wastewater treatment. Results showed .95% ammonium recovery; therefore, the treated regenerate solution can be reused for zeolite regeneration (Sancho et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Ammonium recovery from process water of digested sludge dewatering by membrane contactors

Richter

Wichern

Grömping

et al. 2020

Water Practice and Technology

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Membrane contactors are a promising alternative for nitrogen removal and recovery from process water compared to other physicochemical and biological sidestream treatment processes. Münster wastewater treatment plant (WWTP) is the first municipal WWTP in Germany operating a full-scale membrane contactor system to improve the nitrogen elimination and recovery efficiency. Factors influencing the operation and membrane performance are investigated in an accompanying research project. Additional operational aspects of the applied membrane modules are investigated in detail using a bench-scale membrane contactor. First results of the full-scale application demonstrate a high nitrogen removal efficiency of >95%.

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Valorization of ammonia concentrates from treated urban wastewater using liquid–liquid membrane contactors

Cited by 62 publications

References 26 publications

Preparation and evaluation of zeolites for ammonium removal from municipal wastewater through ion exchange process

Preparation and evaluation of zeolites for ammonium removal from municipal wastewater through ion exchange process

Donnan Dialysis-Osmotic Distillation (DD-OD) Hybrid Process for Selective Ammonium Recovery Driven by Waste Alkali

Ammonium recovery from process water of digested sludge dewatering by membrane contactors

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