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Design and Development of a Coffee Pulper

K K Saha
Farm Machinery and Postharvest Process Engineering Division, BARI

M A Hossain
Farm Machinery and Postharvest Process Engineering Division, BARI

M A Hoque
Farm Machinery and Postharvest Process Engineering Division, BARI

M M Ullah
Farm Machinery and Postharvest Process Engineering Division, BARI

Abstract/ Executive Summary:

The most laborious part of the coffee processing was the pulping or removal of outer skin of the coffee cherry. The first step of coffee processing after harvesting beans and beans were taking out from riper cherries A drum type coffee manual pulper was developed in Farm Machinery and Postharvest Process Engineering Division (FMPE) of Bangladesh Agricultural Research Institute, Gazipur during 2012-2013. The pulper was made of locally available materials. The clearance between the drums was 3-5 mm and it is adjustable with a knob so that it can pulp the coffee cherries of any size. The pulper was tested during 2013-2014 in the laboratory of FMPE Division, BARI, Gazipur and field test was done at Hill Agricultural Research Station, Khagrachari with the fresh ripe coffee cherries. On the basis of last year experience small modification in design was done. The capacity of the pulper was found 23.08 kg/h. The performance of the pulper was good. Separation of pulped beans from the skins has to do manually.

Keywords: Coffee pulper, Traditional method, Postharvest

Location: Farm Machinery and Postharvest Process Engineering Division, BARI, Gazipur

Start Date: 00-00-2012

End Date: 00-00-2013

Program Area: Farm Mechanization

Commodity: Farm machineries

Objectives:

Design of a manual coffee pulper
Test the pulper in laboratory
Compare the pulper performance with traditional method

Methodology:

A manual drum type coffee pulper was developed in Farm Machinery and Post harvest Process Engineering Division of Bangladesh Agricultural Research Institute (BARI) during 2012-2013. To make it low cost, locally available materials were used in fabrication. Efforts were made to keep the mechanism and operation of the machine as simple as possible. The materials used for the fabrication of different parts of the machine were MS angle, MS flat bar, MS sheet, MS shaft, ball-bearing, chain-sprocket and other small items. This machine weighed about 15 kg. The field test was conducted at Hill Agricultural Research Station, Khagrachari during January-February of the year 2014. About 20 kg of coffee cherries were used in different batches and capacities were determined.

Source of Information: Annual Research Report, Farm Machinery and Postharvest Process Engineering Division, BARI--2013-14

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It was observed that the machine pulp the cherries well. The operating speed was kept constant at 65 rev/min. The average capacity was found 23.08 kg/h which was acceptable for a manually operated pulper. A coffee pulper was developed for pulping of coffee cherries in household or small scale processing level. The average pulping capacity of the pulper was found 23.08 kg/h. To increase the capacity and convert it to motorize the experiment will be continued in the next year.

Knowledge Management: Report/Proceedings