Agricultural Raw Materials

Agricultural Raw Materials

There are many more different kinds of agricultural raw materials other than wood. Many raw materials are based on Straw like Wheat Straw, Corn Stalks, Miscanthus etc., Other types are more wet like Bagasse and Reed. Basically, most agricultural raw materials can be briquetted; however, the preparation of the raw material is very important prior to briquetting.

You can read about different agricultural raw materials on the following pages. The website will continuously be updated with more information about different agricultural raw materials.

RAPE STRAW

Today, rapeseed is cultivated for the production of animal feeds, edible vegetable oils, and biodiesel. The waste straw gives a high yield per hectare. The raw material is collected and stored in bales. Normally, the moisture is below 15%. The raw material needs to be shredded and hammer milled with the right equipment prior to briquetting. Removal of stones and sand should be done during the process. Briquettes can be used for fuel in industrial boilers and for animal bedding. C.F. Nielsen has developed special applications for using briquettes for bedding and biomass.

PINEAPPLE WASTE

The waste in connection with the harvesting of pineapples consists of leaves and other non-fruit parts. The waste has high water content, but it can be dried in sun depending on season and rain. If the raw material is dried in the sun in the field it is important to manage the collection of the raw material in a professional way in order to ensure a homogenous raw material with moisture content below 15%. However, generally it is recommended that the raw material is dried to the right moisture level, as this will give higher productivity. The raw material is collected and stored in bales. If the raw material is partly dried in the field the equipment should ensure removal of stones and sand during the process. The fibers are strong and needs to be shredded and hammer milled with the right equipment prior to briquetting. Briquettes are mostly used for fuel in industrial boilers.

PEANUT SHELLS

Peanut shells are often dumped as an unused waste; however, the raw material has a high calorific value and can make excellent briquettes. The shells are most often dry and normally does not need to be down-sized and can therefore be fed directly into a briquetting press. We have experience turning these shells into valuable, high quality briquettes. This provides a sustainable solution for producers worldwide. Briquettes are mostly used for fuel in industrial boilers.

NAPIER GRASS

Napier Grass or King Grass is similar to Miscanthus; however, the crop is mostly grown in Africa or Asia. When used for biomass in the mentioned regions it is often harvested in green conditions with 60-70% moisture. The crop is harvested 3-4 times per year, so the yield is high. The crop needs to be pre-dried in the sun, then collected and stored in bales. The raw material needs to be shredded, dried and hammer milled by the right equipment prior to briquetting. Removal of stones and sand should be done during the process. Briquettes are mostly used for fuel in industrial boilers.

OLIVE PRUNINGS

Olive tree cultivation yields a by-product wood from pruning the trees, which currently is neglected and dealt with as a waste. Often it is burned in the field. The raw material can with great advantage be used as raw material for producing briquettes. The prunings need to be collected in the field –either shredded or baled. Even though the raw material is partly dried in the sun it still needs be shredded, dried and hammer milled prior to briquetting. The briquettes can either be used for industrial boilers or for consumer logs.

MISCANTHUS

Miscanthus is a typical energy crop with a yield of up to 20-25 tons per hectare. In Europe and North America the crop is normally left to dry in the field and can be harvested with a moisture content below 15%. The raw material is often collected and stored in bales. The raw material needs to be shredded and hammer milled by the right equipment prior to briquetting. Briquettes are mostly used for fuel in industrial boilers.

RICE HUSKS

Rice is a crop that is one of the main crops used for food in many parts of the world. The rice husks are however often dumped as an unused waste. The husks are most often dry and does not need to be down-sized and can therefore be fed directly into a briquetting press. C.F. Nielsen has experience turning these husks into valuable, high quality briquettes. Due to the high silica content in the husks, a high wear can be expected when processing the waste. We have developed special wear parts for rice husks. Briquettes are mostly used for fuel in industrial boilers.

SUGAR CANE WASTE/BAGASSE

When processed the sugar cane crop produces sugar juice and bagasse. Bagasse is a valued biomass product, which according to several studies can cover most electricity consumption in rural areas of the world. After processing, the bagasse has a moisture content of app. 45-50% and the raw material needs to be handled and dried in a professional way. Drying in the sun alone will not secure a homogenous fuel and the drying process is necessary to secure moisture content below 15%. C.F. Nielsen presses are optimal for producing sugarcane bagasse briquettes, and we can arrange the whole process, which ensures you high quality briquettes. Briquettes are mostly used for fuel in industrial boilers.

WINE PRUNINGS

Wine production results in a large amount of prunings like branches and twigs. The raw material is mostly neglected and dealt with as a waste. Often it is burned in the field. The prunings need to be collected and baled under dry conditions. The material is shredded and hammer milled on a special production line and later briquetted on our standard equipment. The briquettes can either be used for industrial boilers, for consumer logs or for barbeque.

REED

Reed is a common name for several tall, grass-like plants growing in wetlands around lakes or along rivers. Reed is an invasive plant, which outmatches native vegetation and lowers the local plant biodiversity. On the other side the crop is a good biomass crop. The crop needs to be pre-dried in the sun, then collected and stored in bales. The raw material needs to be shredded, dried and hammer milled with the right equipment prior to briquetting. Removal of stones and sand should be done during the process. Briquettes are mostly used for fuel in industrial boilers.

WHEAT STRAW

In many countries wheat straw is plowed down and not used for energy. The straw gives a high yield per hectare, and is collected and stored in bales. Normally, the moisture is below 15%. The raw material needs to be shredded and hammer milled by the right equipment prior to briquetting. Removal of stones and sand should be done during the process. Briquettes can be used for fuel in industrial boilers and for animal bedding. C.F. Nielsen has developed special applications for using briquettes for bedding and biomass. Read more about wheat straw in our Foulum case.

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