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Toward sustainable and eco-friendly production of coffee: abatement of wastewater and evaluation of its potential valorization

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Abstract

Coffee is one of the most significant beverages consumed worldwide, dating to times immemorial. It plays a pivotal role in several economies owing to its second position in the list of trading commodity, after petroleum. The growing demand for coffee has resulted in a great amount of coffee production and processing and subsequent release of large volumes of wastewater. This wastewater is characterized to have very high chemical oxygen demand and biological oxygen demand with potential to cause environmental pollution thus requiring smart strategies to effectively reduce their load of the wastewater before releasing them into the habitable ambiance. The existing research on coffee wastewater treatment should be critically analyzed for their sustainability and economic viability for them to be commercially used in developing countries for effluent mitigation. This literature review aims to suggest an effective way to treat the wastewater by combining various methods, coupling it with value addition like energy generation. The goal of this review is to provide a direction for future research to integrated treatment with valorization along with a focus on emerging technologies.

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Fig. 1

(adopted from Rattan et al. 2015; Echeverria and Nuti 2017)

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(Adopted from Teh et al. 2016; Mahmudabadi et al. 2018)

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(Adopted from Hartmann et al. 2010; Jiménez et al. 2019)

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(Adopted from Breheny et al. 2019)

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Abbreviations

Q m :

Quantity of CH4 produced per unit time

STe, STo :

Total COD of outgoing treated effluent and incoming untreated effluent, respectively

Q :

Amount of effluent

M :

Volume of methane produced

E :

Efficiency of conversion

ICO:

International Coffee Organization

COD:

Chemical oxygen demand

BOD:

Biological oxygen demand

TDS:

Total dissolved solids

TSS:

Total suspended solids

UASB:

Up-flow anaerobic sludge blanket

UV:

Ultraviolet

EAOP:

Electrochemical advanced oxidation process

HRT:

Hydraulic retention time

OLR:

Organic loading rate

CSTR:

Complete stirred tank reactor

VSS:

Volatile suspended solids

MFC:

Microbial fuel cell

NF:

Nano-filtration

RO:

Reverse osmosis

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Acknowledgement

The authors are indebted to the National Institute of Technology Durgapur, West Bengal, India, and Rensselaer Polytechnic Institute, New York, USA for support during the project.

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Correspondence to Anuj Kumar.

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Sengupta, B., Priyadarshinee, R., Roy, A. et al. Toward sustainable and eco-friendly production of coffee: abatement of wastewater and evaluation of its potential valorization. Clean Techn Environ Policy 22, 995–1014 (2020). https://doi.org/10.1007/s10098-020-01841-y

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  • DOI: https://doi.org/10.1007/s10098-020-01841-y

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