How to make coffee briquettes
First step: Crushing coffee husk
Common coffee wastes such as coffee grounds, coffee husks, coffee chaff, etc. can be used to produce bio-fuel rods. Before making bio-fuel briquettes, we need to make sure the size of the materials is smaller than 5mm, and moisture is below 12%. If we use coffee husks to make briquettes, the first step is crushing coffee husk, making its size less than 5mm. If using coffee grounds or chaff, ignore this step, come to the drying process directly.
Second step: Drying coffee wastes
Usually, the humidity of recycled coffee wastes is different. For better compression molding, we need to dry the materials to reduce the moisture content to below 12%. Choose a suitable coffee wastes dryer according to the processing capacity. An airflow dryer (pipe dryer) can be used for small output, and a rotary drum dryer can be selected for large-scale drying.
2 Types Sawdust Dryer For Drying Biomass Materials In Briquette Producing
Flash sawdust dryer and rotary drum dryer are used widely in biomass briquettes and pellet production. They increase biomass drying efficiency.
Third step: Making briquettes
It is a screw-type briquette machine for making hollow rods from the coffee wastes. This machine includes a heating system that can press the materials into briquettes without any binder.
Pure coffee grounds can’t be used for making briquettes, they need to be mixed with at least 50% sawdust.
Related knowledge about coffee wastes
- Top ten coffee producing countries: Brazil, Vietnam, Colombia, Indonesia, Honduras, Ethiopia, Peru, India, Guatemala, Uganda.
- According to the calculation and statistics of the International Coffee Organization, 650 kg of coffee grounds can be produced per 1 ton of coffee beans. Every 1 kg of instant coffee will produce 2 kg of wet coffee grounds, and on a daily basis, a cup of coffee will produce about 20 grams of coffee grounds.
- A fresh coffee fruit from picking to roasting into coffee beans, through production and packaging, and then grinding into a cup of coffee or making other products into the hands of consumers, the whole process will produce waste. But coffee grounds are the largest and most valuable representative of these wastes.
- Coffee grounds are used to deodorize, grow flowers, and spread into jars to make ashtrays.
- In addition, some people use coffee grounds to grow mushrooms, make soap, make cups, and so on.