Evaluation and optimization of flocculation-sedimentation-filtration process for addressing water-energy nexus challenges at Kemper IGCC power plant: Bench and pilot scale studies

The coal processing system at the Kemper County IGCC power plant featured a fluidized bed dryer system to dry high moisture lignite (> 45%). The system evaporated a large amount of water (60–70 KPPH) that was then used in other plant processes. The evaporated water contained 0.1–0.3% ultrafine pa...

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Autores principales:	Abhijit Bhagavatula, Venkat Rajagopalan, Brent Duncan, Pannalal Vimalchand
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Ultrafine coal particles IGCC Water treatment Flocculation-sedimentation-filtration Renewable energy sources TJ807-830 Agriculture (General) S1-972
Acceso en línea:	https://doaj.org/article/35a14e22c89d44cb8bcd33a6325d9ed2
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spelling	oai:doaj.org-article:35a14e22c89d44cb8bcd33a6325d9ed22021-12-02T05:04:50ZEvaluation and optimization of flocculation-sedimentation-filtration process for addressing water-energy nexus challenges at Kemper IGCC power plant: Bench and pilot scale studies2772-427110.1016/j.nexus.2021.100006https://doaj.org/article/35a14e22c89d44cb8bcd33a6325d9ed22021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2772427121000061https://doaj.org/toc/2772-4271The coal processing system at the Kemper County IGCC power plant featured a fluidized bed dryer system to dry high moisture lignite (> 45%). The system evaporated a large amount of water (60–70 KPPH) that was then used in other plant processes. The evaporated water contained 0.1–0.3% ultrafine particles (d50 of < 3 μm), which caused problems for the filtration system. A novel flocculation-sedimentation with membrane (FSM) filtration process was developed to filter ultrafine particles from the slurry water so it could be used in downstream gasification processes. Bench and pilot scale studies were designed to optimize process parameters such as polymer dilution, flocculant dosage and settling times. Using the optimum polymer dosage obtained from bench scale studies, several pilot scale tests were performed using a slipstream of the process slurry from the ''First-of-its-kind'' Kemper IGCC power plant. The FSM process achieved more than 99% removal of ultrafine suspended solids with a 10-fold increase in the filtration flux rates when compared to standard (ePTFE) membrane filtration. Furthermore, a cleaning process was successfully devised for regenerating the filter media if they were plugged due to operational upsets. The filter media can be cleaned and effectively regenerated by soaking them in 2% bleach solution for 1.5 h. The flux rates obtained after filter media regeneration were comparable to the flux rates obtained on new filter media.Abhijit BhagavatulaVenkat RajagopalanBrent DuncanPannalal VimalchandElsevierarticleUltrafine coal particlesIGCCWater treatmentFlocculation-sedimentation-filtrationRenewable energy sourcesTJ807-830Agriculture (General)S1-972ENEnergy Nexus, Vol 1, Iss , Pp 100006- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ultrafine coal particles IGCC Water treatment Flocculation-sedimentation-filtration Renewable energy sources TJ807-830 Agriculture (General) S1-972
spellingShingle	Ultrafine coal particles IGCC Water treatment Flocculation-sedimentation-filtration Renewable energy sources TJ807-830 Agriculture (General) S1-972 Abhijit Bhagavatula Venkat Rajagopalan Brent Duncan Pannalal Vimalchand Evaluation and optimization of flocculation-sedimentation-filtration process for addressing water-energy nexus challenges at Kemper IGCC power plant: Bench and pilot scale studies
description	The coal processing system at the Kemper County IGCC power plant featured a fluidized bed dryer system to dry high moisture lignite (> 45%). The system evaporated a large amount of water (60–70 KPPH) that was then used in other plant processes. The evaporated water contained 0.1–0.3% ultrafine particles (d50 of < 3 μm), which caused problems for the filtration system. A novel flocculation-sedimentation with membrane (FSM) filtration process was developed to filter ultrafine particles from the slurry water so it could be used in downstream gasification processes. Bench and pilot scale studies were designed to optimize process parameters such as polymer dilution, flocculant dosage and settling times. Using the optimum polymer dosage obtained from bench scale studies, several pilot scale tests were performed using a slipstream of the process slurry from the ''First-of-its-kind'' Kemper IGCC power plant. The FSM process achieved more than 99% removal of ultrafine suspended solids with a 10-fold increase in the filtration flux rates when compared to standard (ePTFE) membrane filtration. Furthermore, a cleaning process was successfully devised for regenerating the filter media if they were plugged due to operational upsets. The filter media can be cleaned and effectively regenerated by soaking them in 2% bleach solution for 1.5 h. The flux rates obtained after filter media regeneration were comparable to the flux rates obtained on new filter media.
format	article
author	Abhijit Bhagavatula Venkat Rajagopalan Brent Duncan Pannalal Vimalchand
author_facet	Abhijit Bhagavatula Venkat Rajagopalan Brent Duncan Pannalal Vimalchand
author_sort	Abhijit Bhagavatula
title	Evaluation and optimization of flocculation-sedimentation-filtration process for addressing water-energy nexus challenges at Kemper IGCC power plant: Bench and pilot scale studies
title_short	Evaluation and optimization of flocculation-sedimentation-filtration process for addressing water-energy nexus challenges at Kemper IGCC power plant: Bench and pilot scale studies
title_full	Evaluation and optimization of flocculation-sedimentation-filtration process for addressing water-energy nexus challenges at Kemper IGCC power plant: Bench and pilot scale studies
title_fullStr	Evaluation and optimization of flocculation-sedimentation-filtration process for addressing water-energy nexus challenges at Kemper IGCC power plant: Bench and pilot scale studies
title_full_unstemmed	Evaluation and optimization of flocculation-sedimentation-filtration process for addressing water-energy nexus challenges at Kemper IGCC power plant: Bench and pilot scale studies
title_sort	evaluation and optimization of flocculation-sedimentation-filtration process for addressing water-energy nexus challenges at kemper igcc power plant: bench and pilot scale studies
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/35a14e22c89d44cb8bcd33a6325d9ed2
work_keys_str_mv	AT abhijitbhagavatula evaluationandoptimizationofflocculationsedimentationfiltrationprocessforaddressingwaterenergynexuschallengesatkemperigccpowerplantbenchandpilotscalestudies AT venkatrajagopalan evaluationandoptimizationofflocculationsedimentationfiltrationprocessforaddressingwaterenergynexuschallengesatkemperigccpowerplantbenchandpilotscalestudies AT brentduncan evaluationandoptimizationofflocculationsedimentationfiltrationprocessforaddressingwaterenergynexuschallengesatkemperigccpowerplantbenchandpilotscalestudies AT pannalalvimalchand evaluationandoptimizationofflocculationsedimentationfiltrationprocessforaddressingwaterenergynexuschallengesatkemperigccpowerplantbenchandpilotscalestudies
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Evaluation and optimization of flocculation-sedimentation-filtration process for addressing water-energy nexus challenges at Kemper IGCC power plant: Bench and pilot scale studies

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