Current trends and future prospects of ammonia removal in wastewater: A comprehensive review on adsorptive membrane development

Adam, Mohd Ridhwan; Othman, Mohd Hafiz Dzarfan; Samah, Rozaimi Abu; Puteh, Mohd Hafiz; Ismail, Ahmad Fauzi; Mustafa, Azeman; Rahman, Mukhlis A.

doi:10.1016/j.seppur.2018.12.030

Cited by 180 publications

(62 citation statements)

References 123 publications

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“…Figure 12 depicts the schematic of the intraparticle pores of an adsorbent for the adsorption process [51]. The presence of pores in an adsorbent particle increases the adsorption surface that serves as the active site for the adsorption to occur [52]. Besides promoting a more compact membrane structure, smaller natural zeolite particles also offer more surface area (including the intraparticle pores, namely macropore, mesopore, and micropore) that finally increases the adsorption capacity of the fabricated membranes.…”

Section: Ammonia Removal By Natural Zeolite Hfcmmentioning

confidence: 99%

Influence of the Natural Zeolite Particle Size Toward the Ammonia Adsorption Activity in Ceramic Hollow Fiber Membrane

et al. 2020

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Natural zeolite is widely used in removing ammonia via adsorption process because of its superior ion-exchange properties. Ceramic particle size affects the adsorptivity of particles toward ammonia. In this study, hollow fiber ceramic membrane (HFCM) was fabricated from natural zeolite via phase inversion. The effect of natural zeolite particle size toward the properties and performance of HFCM was evaluated. The results show that the HFCM with smaller particle sizes exhibited a more compact morphological structure with better mechanical strength. The adsorption performance of HFCM was significantly improved with smaller particle sizes because of longer residence time, as proven by the lower water permeability. A high adsorption performance of 96.67% was achieved for HFCM with the smallest particle size (36 μm). These findings provide a new perspective on the promising properties of the natural zeolite-derived HFCM for ammonia removal.

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Section: Ammonia Removal By Natural Zeolite Hfcmmentioning

confidence: 99%

Influence of the Natural Zeolite Particle Size Toward the Ammonia Adsorption Activity in Ceramic Hollow Fiber Membrane

et al. 2020

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“…These ion exchangers are usually either natural or artificial. In most cases, minerals that are crystalline, hydrated, aluminosilicate of alkali, or alkaline earth ions provide ion exchangers with high adsorption capacity (Adam et al 2018).…”

Section: Ion Exchange Methodsmentioning

confidence: 99%

Approaches to the mitigation of ammonia inhibition during anaerobic digestion – a review

Mutegoa

Hilonga

Njau

2020

Water Practice and Technology

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The digestion process of organic waste rich in high ammonia content has always been a gridlock during the methanogenesis process. The free ammonia may increase inhibition/toxicity, which in turn affects the microbial community in the digester and eventually leads to process failures. Substantial methods have been proposed and assessed for curtailing ammonia emissions in anaerobic digesters to attain a safe and steady process so that, along with high methane production, high quality effluents can also be recovered. There are several means for lowering the erratic ammonia in organic wastes that are in use currently, such as decrease of pH, which favours the formation of ammonium over ammonia in the equilibrium; for example, the use of chemical additives that attach ammonium-N. Ammonia can also be removed from nitrogen-rich substrates during anaerobic digestion through other methods such as struvite precipitation, membrane distillation, air stripping, ion exchange, and adsorption. A thorough survey of different articles has shown that ion exchange, adsorption and changing of the C/N ratio through the co-digestion technique are the most commonly studied methods for mitigating ammonia inhibition in wastewater during anaerobic digestion. A detailed review of these methods in the context of nitrogen-rich substrates will be discussed in this paper.

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“…Zeolite molecular sieve (NaA type, Brunauer-Emmett-Teller (BET) surface area 7.770 m 2 /g, pore volume 0.113 cm 3 /g, average pore diameter 4.403nm) was purchased from Shanghai New Molecular Sieve Co., Ltd. (Shanghai, China). NH 4 + -N was prepared with ammonium chloride (NH 4 Cl, 99.8%),…”

Section: Methodsmentioning

confidence: 99%

“…The concentration of ammonium nitrogen from different sources is very high. For example, the ammonium nitrogen concentration in industrial-based wastewater may be in the range of 5-1000 mg/L and in the municipal wastewater is the range of 10-200 mg/L [4]. Such high concentration of ammonium nitrogen in water can cause serious environmental problems, like the depletion of dissolved oxygen, accelerated eutrophication of lakes and rivers and toxicity in fish and other aquatic animals [5,6].…”

Section: Introductionmentioning

confidence: 99%

Chitosan Modified Zeolite Molecular Sieve Particles as a Filter for Ammonium Nitrogen Removal from Water

Gao

Zhang

2020

IJMS

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Drinking water containing a high amount of ammonium-nitrogen (NH4+-N) is not effectively removed by conventional treatment processes and can cause eutrophication. In this research, a composite adsorbent based on chitosan crosslink with zeolite molecular sieve (CTS-ZMS) was prepared for NH4+-N removal through dynamic adsorption filter experiments. Effect of bed depth (30, 50 and 70 cm), flow rate (32, 49 and 65 mL/min), initial pH value (4.5, 6.5 and 8.5) and influent NH4+-N concentration (3, 5 and 7 mg/L) was examined by using a filter column packed with CTS-ZMS particles. The Thomas model was applied to study the breakthrough curves and adsorption capacity. The optimal process parameters of the aforementioned factors were obtained at bed depth of 70 cm, flow rate of 32 mL/min, pH of 6.5 and initial NH4+-N concentration of 7 mg/L. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and Fourier Transform Infrared Spectroscopy (FTIR) were investigated to analyze the structure and morphology of the CTS-ZMS adsorbents before and after 3 months running. The EDS and FTIR results showed Na+ and the active functional groups of -OH, -NH2 and -COO− on CTS-ZMS adsorbent particles reacted with ammonium nitrogen. The results of this study supported the use of CTS-ZMS to improve drinking water filtration processes by increasing ammonium nitrogen reductions.

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Current trends and future prospects of ammonia removal in wastewater: A comprehensive review on adsorptive membrane development

Cited by 180 publications

References 123 publications

Influence of the Natural Zeolite Particle Size Toward the Ammonia Adsorption Activity in Ceramic Hollow Fiber Membrane

Influence of the Natural Zeolite Particle Size Toward the Ammonia Adsorption Activity in Ceramic Hollow Fiber Membrane

Approaches to the mitigation of ammonia inhibition during anaerobic digestion – a review

Chitosan Modified Zeolite Molecular Sieve Particles as a Filter for Ammonium Nitrogen Removal from Water

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