AMMONOX: Ammonia for enhancing biogas yield and reducing NOx. Optimisation of Aqueous Ammonia Treatment

Anna Lymperatou, Hariklia N. Gavala, Kim Harry Esbensen, Ioannis Skiadas

Research output: Contribution to journalConference article in JournalResearchpeer-review

3 Citations (Scopus)

Abstract

Laboratory experiments have shown that Aqueous Ammonia Soaking (AAS) is a very promising treatment for increasing the methane yield of the solid fraction of manure (fibers). AMMONOX is a new concept based on the sustainable use of ammonia for enhancing biogas production at biogas plants digesting manure. The proposed process is based on an optimized AAS treatment of manure fibers in combination with an efficient ammonia recovery step. The enhancement of biogas production is achieved by enriching manure with AAS-treated fibers or other lignocellulosic residues while the ammonia recovered can be used for fulfilling the needs of the treatment. Furthermore, excess of ammonia could be produced when ammonia is recovered from both the treated fibers and the digester effluent, which could be used for the reduction of NOx when the biogas produced is used for electricity generation by gas engines.
In this study, the importance of different factors affecting the performance of AAS of digested manure fibers was investigated in order to conclude on the variables to optimize. Principal Component Analysis of the experimental data obtained so far was used for a preliminary analysis of effects. The temperature and the ammonia concentration during AAS were pointed out as the most influencing variables in terms of methane yield under the conditions tested. Further experiments should be conducted in order to investigate the effect of AAS duration at lower values than the ones tested (lower than 24 hours) and for assessing the importance of the solids to liquid ratio in the treatment mixture.
Original languageEnglish
JournalWaste and Biomass Valorization
Volume6
Issue number4
Pages (from-to)449-457
ISSN1877-2641
DOIs
Publication statusPublished - 2015
EventInternational Conference on Engineering for Waste and Biomass Valorisation - Avenida Lucio Costa, 2630 Barra da Tijuca RIO DE JANEIRO, BRAZIL, Rio de Janeiro, Brazil
Duration: 24 Aug 201428 Aug 2014
Conference number: 5

Conference

ConferenceInternational Conference on Engineering for Waste and Biomass Valorisation
Number5
LocationAvenida Lucio Costa, 2630 Barra da Tijuca RIO DE JANEIRO, BRAZIL
CountryBrazil
CityRio de Janeiro
Period24/08/201428/08/2014

Fingerprint

Biogas
biogas
Ammonia
ammonia
Manures
manure
Fibers
Methane
methane
Gas engines
electricity generation
Principal component analysis
soaking
Effluents
principal component analysis
Electricity
Experiments
fibre
effluent

Bibliographical note

Electronic version: 5th International Conference on Engineering for Waste and Biomass Valorisation - Aug. 24–28, 2014 - Rio de Janeiro, Brazil. ISBN: 979-10-91526-03-6

Cite this

@inproceedings{445e041608c642d4a8dac16420b63dd4,
title = "AMMONOX: Ammonia for enhancing biogas yield and reducing NOx. Optimisation of Aqueous Ammonia Treatment",
abstract = "Laboratory experiments have shown that Aqueous Ammonia Soaking (AAS) is a very promising treatment for increasing the methane yield of the solid fraction of manure (fibers). AMMONOX is a new concept based on the sustainable use of ammonia for enhancing biogas production at biogas plants digesting manure. The proposed process is based on an optimized AAS treatment of manure fibers in combination with an efficient ammonia recovery step. The enhancement of biogas production is achieved by enriching manure with AAS-treated fibers or other lignocellulosic residues while the ammonia recovered can be used for fulfilling the needs of the treatment. Furthermore, excess of ammonia could be produced when ammonia is recovered from both the treated fibers and the digester effluent, which could be used for the reduction of NOx when the biogas produced is used for electricity generation by gas engines.In this study, the importance of different factors affecting the performance of AAS of digested manure fibers was investigated in order to conclude on the variables to optimize. Principal Component Analysis of the experimental data obtained so far was used for a preliminary analysis of effects. The temperature and the ammonia concentration during AAS were pointed out as the most influencing variables in terms of methane yield under the conditions tested. Further experiments should be conducted in order to investigate the effect of AAS duration at lower values than the ones tested (lower than 24 hours) and for assessing the importance of the solids to liquid ratio in the treatment mixture.",
author = "Anna Lymperatou and Gavala, {Hariklia N.} and Esbensen, {Kim Harry} and Ioannis Skiadas",
note = "Electronic version: 5th International Conference on Engineering for Waste and Biomass Valorisation - Aug. 24–28, 2014 - Rio de Janeiro, Brazil. ISBN: 979-10-91526-03-6",
year = "2015",
doi = "10.1007/s12649-015-9365-4",
language = "English",
volume = "6",
pages = "449--457",
journal = "Waste and Biomass Valorization",
issn = "1877-2641",
publisher = "Springer",
number = "4",

}

AMMONOX : Ammonia for enhancing biogas yield and reducing NOx. Optimisation of Aqueous Ammonia Treatment. / Lymperatou, Anna; Gavala, Hariklia N.; Esbensen, Kim Harry; Skiadas, Ioannis.

In: Waste and Biomass Valorization, Vol. 6, No. 4, 2015, p. 449-457.

Research output: Contribution to journalConference article in JournalResearchpeer-review

TY - GEN

T1 - AMMONOX

T2 - Ammonia for enhancing biogas yield and reducing NOx. Optimisation of Aqueous Ammonia Treatment

AU - Lymperatou, Anna

AU - Gavala, Hariklia N.

AU - Esbensen, Kim Harry

AU - Skiadas, Ioannis

N1 - Electronic version: 5th International Conference on Engineering for Waste and Biomass Valorisation - Aug. 24–28, 2014 - Rio de Janeiro, Brazil. ISBN: 979-10-91526-03-6

PY - 2015

Y1 - 2015

N2 - Laboratory experiments have shown that Aqueous Ammonia Soaking (AAS) is a very promising treatment for increasing the methane yield of the solid fraction of manure (fibers). AMMONOX is a new concept based on the sustainable use of ammonia for enhancing biogas production at biogas plants digesting manure. The proposed process is based on an optimized AAS treatment of manure fibers in combination with an efficient ammonia recovery step. The enhancement of biogas production is achieved by enriching manure with AAS-treated fibers or other lignocellulosic residues while the ammonia recovered can be used for fulfilling the needs of the treatment. Furthermore, excess of ammonia could be produced when ammonia is recovered from both the treated fibers and the digester effluent, which could be used for the reduction of NOx when the biogas produced is used for electricity generation by gas engines.In this study, the importance of different factors affecting the performance of AAS of digested manure fibers was investigated in order to conclude on the variables to optimize. Principal Component Analysis of the experimental data obtained so far was used for a preliminary analysis of effects. The temperature and the ammonia concentration during AAS were pointed out as the most influencing variables in terms of methane yield under the conditions tested. Further experiments should be conducted in order to investigate the effect of AAS duration at lower values than the ones tested (lower than 24 hours) and for assessing the importance of the solids to liquid ratio in the treatment mixture.

AB - Laboratory experiments have shown that Aqueous Ammonia Soaking (AAS) is a very promising treatment for increasing the methane yield of the solid fraction of manure (fibers). AMMONOX is a new concept based on the sustainable use of ammonia for enhancing biogas production at biogas plants digesting manure. The proposed process is based on an optimized AAS treatment of manure fibers in combination with an efficient ammonia recovery step. The enhancement of biogas production is achieved by enriching manure with AAS-treated fibers or other lignocellulosic residues while the ammonia recovered can be used for fulfilling the needs of the treatment. Furthermore, excess of ammonia could be produced when ammonia is recovered from both the treated fibers and the digester effluent, which could be used for the reduction of NOx when the biogas produced is used for electricity generation by gas engines.In this study, the importance of different factors affecting the performance of AAS of digested manure fibers was investigated in order to conclude on the variables to optimize. Principal Component Analysis of the experimental data obtained so far was used for a preliminary analysis of effects. The temperature and the ammonia concentration during AAS were pointed out as the most influencing variables in terms of methane yield under the conditions tested. Further experiments should be conducted in order to investigate the effect of AAS duration at lower values than the ones tested (lower than 24 hours) and for assessing the importance of the solids to liquid ratio in the treatment mixture.

U2 - 10.1007/s12649-015-9365-4

DO - 10.1007/s12649-015-9365-4

M3 - Conference article in Journal

VL - 6

SP - 449

EP - 457

JO - Waste and Biomass Valorization

JF - Waste and Biomass Valorization

SN - 1877-2641

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ER -