Combined anaerobic digestion and photocatalytic treatment of distillery effluent in fluidized bed reactors focusing on energy conservation

Seth Apollo, Aoyi Ochieng

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Anaerobic digestion (AD) can remove substantial amount of organic load when applied in treating distillery effluent but it is ineffective in colour reduction. Conversely, photodegradation is effective in colour reduction but has high energy requirement. A study on the synergy of a combined AD and ultra violet (UV) photodegradation treatment of distillery effluent was carried out in fluidized bed reactors to evaluate pollution reduction and energy utilization efficiencies. The combined process improved colour removal from 41% to 85% compared to that of AD employed as a stand-alone process. An overall corresponding total organic carbon (TOC) reduction of 83% was achieved. The bioenergy production by the AD step was 14.2 kJ/g total organic carbon (TOC) biodegraded while UV lamp energy consumption was 0.9 kJ/mg TOC, corresponding to up to 100% colour removal. Electrical energy per order analysis for the photodegradation process showed that the bioenergy produced was 20% of that required by the UV lamp to photodegrade 1 m3 of undiluted pre-AD treated effluent up to 75% colour reduction. It was concluded that a combined AD-UV system for treatment of distillery effluent is effective in organic load removal and can be operated at a reduced cost.
Original languageEnglish
Pages (from-to)2243-2251
Number of pages10
JournalEnvironmental Technology
Volume37
Issue number17
DOIs
Publication statusPublished - 2016

Fingerprint

Distilleries
Anaerobic digestion
energy conservation
Fluidized beds
Effluents
Energy conservation
effluent
Photodegradation
photodegradation
Organic carbon
total organic carbon
Ultraviolet lamps
bioenergy
Color
Energy utilization
energy
anaerobic digestion
reactor
Pollution
pollution

Cite this

@article{e47a5296873b48dfad0831f8148b1570,
title = "Combined anaerobic digestion and photocatalytic treatment of distillery effluent in fluidized bed reactors focusing on energy conservation",
abstract = "Anaerobic digestion (AD) can remove substantial amount of organic load when applied in treating distillery effluent but it is ineffective in colour reduction. Conversely, photodegradation is effective in colour reduction but has high energy requirement. A study on the synergy of a combined AD and ultra violet (UV) photodegradation treatment of distillery effluent was carried out in fluidized bed reactors to evaluate pollution reduction and energy utilization efficiencies. The combined process improved colour removal from 41{\%} to 85{\%} compared to that of AD employed as a stand-alone process. An overall corresponding total organic carbon (TOC) reduction of 83{\%} was achieved. The bioenergy production by the AD step was 14.2 kJ/g total organic carbon (TOC) biodegraded while UV lamp energy consumption was 0.9 kJ/mg TOC, corresponding to up to 100{\%} colour removal. Electrical energy per order analysis for the photodegradation process showed that the bioenergy produced was 20{\%} of that required by the UV lamp to photodegrade 1 m3 of undiluted pre-AD treated effluent up to 75{\%} colour reduction. It was concluded that a combined AD-UV system for treatment of distillery effluent is effective in organic load removal and can be operated at a reduced cost.",
author = "Seth Apollo and Aoyi Ochieng",
year = "2016",
doi = "10.1080/09593330.2016.1146342",
language = "English",
volume = "37",
pages = "2243--2251",
journal = "Environmental Technology (United Kingdom)",
issn = "0959-3330",
publisher = "Taylor and Francis Ltd.",
number = "17",

}

TY - JOUR

T1 - Combined anaerobic digestion and photocatalytic treatment of distillery effluent in fluidized bed reactors focusing on energy conservation

AU - Apollo, Seth

AU - Ochieng, Aoyi

PY - 2016

Y1 - 2016

N2 - Anaerobic digestion (AD) can remove substantial amount of organic load when applied in treating distillery effluent but it is ineffective in colour reduction. Conversely, photodegradation is effective in colour reduction but has high energy requirement. A study on the synergy of a combined AD and ultra violet (UV) photodegradation treatment of distillery effluent was carried out in fluidized bed reactors to evaluate pollution reduction and energy utilization efficiencies. The combined process improved colour removal from 41% to 85% compared to that of AD employed as a stand-alone process. An overall corresponding total organic carbon (TOC) reduction of 83% was achieved. The bioenergy production by the AD step was 14.2 kJ/g total organic carbon (TOC) biodegraded while UV lamp energy consumption was 0.9 kJ/mg TOC, corresponding to up to 100% colour removal. Electrical energy per order analysis for the photodegradation process showed that the bioenergy produced was 20% of that required by the UV lamp to photodegrade 1 m3 of undiluted pre-AD treated effluent up to 75% colour reduction. It was concluded that a combined AD-UV system for treatment of distillery effluent is effective in organic load removal and can be operated at a reduced cost.

AB - Anaerobic digestion (AD) can remove substantial amount of organic load when applied in treating distillery effluent but it is ineffective in colour reduction. Conversely, photodegradation is effective in colour reduction but has high energy requirement. A study on the synergy of a combined AD and ultra violet (UV) photodegradation treatment of distillery effluent was carried out in fluidized bed reactors to evaluate pollution reduction and energy utilization efficiencies. The combined process improved colour removal from 41% to 85% compared to that of AD employed as a stand-alone process. An overall corresponding total organic carbon (TOC) reduction of 83% was achieved. The bioenergy production by the AD step was 14.2 kJ/g total organic carbon (TOC) biodegraded while UV lamp energy consumption was 0.9 kJ/mg TOC, corresponding to up to 100% colour removal. Electrical energy per order analysis for the photodegradation process showed that the bioenergy produced was 20% of that required by the UV lamp to photodegrade 1 m3 of undiluted pre-AD treated effluent up to 75% colour reduction. It was concluded that a combined AD-UV system for treatment of distillery effluent is effective in organic load removal and can be operated at a reduced cost.

U2 - 10.1080/09593330.2016.1146342

DO - 10.1080/09593330.2016.1146342

M3 - Article

VL - 37

SP - 2243

EP - 2251

JO - Environmental Technology (United Kingdom)

JF - Environmental Technology (United Kingdom)

SN - 0959-3330

IS - 17

ER -