Sustainable Removal of Ammonia from the Anaerobic Digester Supernatant Line Using a Prussian Blue Analogue (PBA) Composite Adsorbent

Paz Nativ; Zenebu Abera Derbew; Chen Dagan-Jaldety; Yaron Aviezer; Raz Ben-Asher; Ori Lahav

doi:10.3390/chemengineering6060097

Sustainable Removal of Ammonia from the Anaerobic Digester Supernatant Line Using a Prussian Blue Analogue (PBA) Composite Adsorbent

Paz Nativ, Zenebu Abera Derbew, Chen Dagan-Jaldety, Yaron Aviezer, Raz Ben-Asher, Ori Lahav^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

This paper reports on the physico-chemical removal of NH₄⁺ from the supernatant line in municipal wastewater treatment plants (WWTPs), using zinc-hexa-cyano-ferrate (ZnHCF) beads. The work is divided into three parts: First, the characteristics of three (Zn-, Co-, Ni-) types of HCF beads were determined, with a finding that ZnHCF was the most suitable for the purpose of this work. Second, synthetic and actual supernatant wastewater was passed through a ZnHCF column for many cycles until apparent steady-state results were attained. Due to the very high affinity of the beads toward NH₄⁺ and the much lower affinity toward competing cations, the same regeneration solution could be used for many cycles (20 cycles in this work) without affecting the following adsorption breakthrough curve efficiency and the operational capacity, which was >88% at the end of all adsorption steps. Finally, a cost analysis was performed, revealing that the cost of removing ~500 mg/L of ammonia from the supernatant line is ~$0.02 per m³ of raw wastewater flowing into the plant if the ammonia is recaptured and sold as NH₄Cl. This may be cost-effective when the WWTP receives a higher-than-planned load, and an incentive exists for alleviating the ammonia load on the oxidation reactor.

Original language	English
Article number	97
Journal	ChemEngineering
Volume	6
Issue number	6
DOIs	https://doi.org/10.3390/chemengineering6060097
State	Published - Dec 2022
Externally published	Yes

Keywords

Prussian Blue Analogues (PBA) composite
WWTP
ammonia
dewatering supernatant
digested sludge
separation

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10.3390/chemengineering6060097

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title = "Sustainable Removal of Ammonia from the Anaerobic Digester Supernatant Line Using a Prussian Blue Analogue (PBA) Composite Adsorbent",

abstract = "This paper reports on the physico-chemical removal of NH4+ from the supernatant line in municipal wastewater treatment plants (WWTPs), using zinc-hexa-cyano-ferrate (ZnHCF) beads. The work is divided into three parts: First, the characteristics of three (Zn-, Co-, Ni-) types of HCF beads were determined, with a finding that ZnHCF was the most suitable for the purpose of this work. Second, synthetic and actual supernatant wastewater was passed through a ZnHCF column for many cycles until apparent steady-state results were attained. Due to the very high affinity of the beads toward NH4+ and the much lower affinity toward competing cations, the same regeneration solution could be used for many cycles (20 cycles in this work) without affecting the following adsorption breakthrough curve efficiency and the operational capacity, which was >88% at the end of all adsorption steps. Finally, a cost analysis was performed, revealing that the cost of removing ~500 mg/L of ammonia from the supernatant line is ~$0.02 per m3 of raw wastewater flowing into the plant if the ammonia is recaptured and sold as NH4Cl. This may be cost-effective when the WWTP receives a higher-than-planned load, and an incentive exists for alleviating the ammonia load on the oxidation reactor.",

keywords = "Prussian Blue Analogues (PBA) composite, WWTP, ammonia, dewatering supernatant, digested sludge, separation",

author = "Paz Nativ and Derbew, {Zenebu Abera} and Chen Dagan-Jaldety and Yaron Aviezer and Raz Ben-Asher and Ori Lahav",

note = "Publisher Copyright: {\textcopyright} 2022 by the authors.",

year = "2022",

month = dec,

doi = "10.3390/chemengineering6060097",

language = "英语",

volume = "6",

journal = "ChemEngineering",

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AU - Nativ, Paz

AU - Derbew, Zenebu Abera

AU - Dagan-Jaldety, Chen

AU - Aviezer, Yaron

AU - Ben-Asher, Raz

AU - Lahav, Ori

PY - 2022/12

Y1 - 2022/12

N2 - This paper reports on the physico-chemical removal of NH4+ from the supernatant line in municipal wastewater treatment plants (WWTPs), using zinc-hexa-cyano-ferrate (ZnHCF) beads. The work is divided into three parts: First, the characteristics of three (Zn-, Co-, Ni-) types of HCF beads were determined, with a finding that ZnHCF was the most suitable for the purpose of this work. Second, synthetic and actual supernatant wastewater was passed through a ZnHCF column for many cycles until apparent steady-state results were attained. Due to the very high affinity of the beads toward NH4+ and the much lower affinity toward competing cations, the same regeneration solution could be used for many cycles (20 cycles in this work) without affecting the following adsorption breakthrough curve efficiency and the operational capacity, which was >88% at the end of all adsorption steps. Finally, a cost analysis was performed, revealing that the cost of removing ~500 mg/L of ammonia from the supernatant line is ~$0.02 per m3 of raw wastewater flowing into the plant if the ammonia is recaptured and sold as NH4Cl. This may be cost-effective when the WWTP receives a higher-than-planned load, and an incentive exists for alleviating the ammonia load on the oxidation reactor.

AB - This paper reports on the physico-chemical removal of NH4+ from the supernatant line in municipal wastewater treatment plants (WWTPs), using zinc-hexa-cyano-ferrate (ZnHCF) beads. The work is divided into three parts: First, the characteristics of three (Zn-, Co-, Ni-) types of HCF beads were determined, with a finding that ZnHCF was the most suitable for the purpose of this work. Second, synthetic and actual supernatant wastewater was passed through a ZnHCF column for many cycles until apparent steady-state results were attained. Due to the very high affinity of the beads toward NH4+ and the much lower affinity toward competing cations, the same regeneration solution could be used for many cycles (20 cycles in this work) without affecting the following adsorption breakthrough curve efficiency and the operational capacity, which was >88% at the end of all adsorption steps. Finally, a cost analysis was performed, revealing that the cost of removing ~500 mg/L of ammonia from the supernatant line is ~$0.02 per m3 of raw wastewater flowing into the plant if the ammonia is recaptured and sold as NH4Cl. This may be cost-effective when the WWTP receives a higher-than-planned load, and an incentive exists for alleviating the ammonia load on the oxidation reactor.

KW - Prussian Blue Analogues (PBA) composite

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KW - dewatering supernatant

KW - digested sludge

KW - separation

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Sustainable Removal of Ammonia from the Anaerobic Digester Supernatant Line Using a Prussian Blue Analogue (PBA) Composite Adsorbent

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Keywords

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