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Energetic Potential of Coffee Waste from Anaerobic Digestion and Combustion

Ait Lhaj Lahcen Samira, Ibn Ahmed Said, Lahboubi Nabila, El Bari Hassan

Ecological Engineering & Environmental Technology

2023

Vol. 24, iss. 2

138--145

Coffee is present in every street in the world and is without a doubt one of the most consumed beverages. Moreover, it is the third most consumed drink in the world. Recent estimations from the International Coffee Organization put. The world coffee production at about 6 million tons per year. Its uncontrolled disposal can cause environmental problems, but if handled properly, it can be processed into pellets, and used as an energy source. In the present study, the production of energy from coffee waste (CW) is an interesting alternative to traditional production lines. The objective of this study is to calculate the energetic potential (Ep), which can be generated by anaerobic digestion (AD) and thermochemical conversion (TC), of the organic fraction of CW in the city of Kenitra, Morocco. An elementary analysis allows us to estimate the calorific value by the TC. The lower and higher calorific values were estimated to be: 18.71 and 20.28 MJ/Kg, respectively. Ep results by AD and CT were 0.25 and 1.3 MWh/t, respectively.

Roasted coffee waste as a substitute of wood chips in particleboards

Dukarska D., Myszka Sz., Andrearczyk A., Ogrodowska E., Grzana M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2018

No. 104

43--47

The paper presents preliminary results of our studies on possible use of roasted coffee waste in the form of husks as a substitute for wood chips in three-ply particleboards glued with melamine-formaldehyde resin (MUF). We produced boards in which roasted coffee waste substituted up to 50% of wood chips. Increasing share of coffee waste caused a gradual decrease in the board bending strength and internal bond. However, strength of the boards containing even 50% of coffee waste was typical of P2 boards, i.e., those intended for interior decoration, including furniture used in dry conditions.