A comprehensive review on utilization of wastewater from coffee processing

Abstract

The coffee processing industry is one of the major agro-based industries contributing significantly in international and national growth. Coffee fruits are processed by two methods, wet and dry process. In wet processing, coffee fruits generate enormous quantities of high strength wastewater requiring systematic treatment prior to disposal. Different method approach is used to treat the wastewater. Many researchers have attempted to assess the efficiency of batch aeration as posttreatment of coffee processing wastewater from an upflow anaerobic hybrid reactor (UAHR)-continuous and intermittent aeration system. However, wet coffee processing requires a high degree of processing know-how and produces large amounts of effluents which have the potential to damage the environment. Characteristics of wastewater from coffee processing has a biological oxygen demand (BOD) of up to 20,000 mg/l and a chemical oxygen demand (COD) of up to 50,000 mg/l as well as the acidity of pH below 4. In this review paper, various methods are discussed to treat coffee processing wastewaters; the constitution of wastewater is presented and the technical solutions for wastewater treatment are discussed.

Determinación Del Contenido De Humedad en Granos De Café Pergamino Seco Utilizando Speckle Dinámico

“…El café es una planta del género Coffea, compuesto por aproximadamente 100 especies, de las que tres de ellas son cultivadas con fines comerciales: Coffea arabica L., Coffea Canephora Pierre exFroehner, conocida como robusta, y Coffea liberica Bull exHiern, destacándose principalmente las dos primeras [1]. En Colombia se cultivan plantas que pertenecen a la especie C. arabica, entre las que se encuentran las variedades Caturra, Colombia, Castillo, Típica y Borbón, principalmente [2].…”

Environmental Flows Risk Assessment of Effluent Outfalls from Conventional Wet Washed Coffee Refineries in Limu Kosa District of Southwestern Ethiopia

“…This results in pollution equivalent to 45 kg COD or 273m 3 of crude domestic sewage per day [6][7]. Obviously, CWCR requires a high degree of processing know-how and produces large amounts of effluents which have the potential to damage the Eflows [8]. Pollution of water resources can thus aggravate water scarcity [9].…”

Microbial fuel cell: An energy harvesting technique for environmental remediation

“…The intensive processing of agricultural products for the agri-business industry usually generates a large amount of polluted water, which cannot be reused again for agricultural purposes, because of the high amount of organic pollution in the wastewater produced by this industry. MFCs can, for example, be a suitable solution for the depollution of wastewater from coffee processing, allowing coffee farmers a safe second utilization of the water [8,9], and at the same time a recovery of energy for the system's functioning and sensors.…”