Palm Oil

The African Oil Palm is the crop with the highest oil yield per hectare. This explains why the Oil Palm industry is growing significantly around the world to provide fats and oils needed mostly by the food industry.

The sector is currently under pressure to ensure more sustainability to its practices. BIOTEC is part of this dynamic, providing relevant and tailor made solutions at environmental, agricultural, energy and social levels.

Each palm oil mill generates liquid by-products known as Palm Oil Mill Effluent (POME). This effluent holds large amounts of organic matter, equivalent to those generated by densely populated cities, thus they pose a significant risk of environmental contamination.

On the other hand, these by-products have a fertiliser value and a significant energy potential. The bio-digestion of the "POME" in bio-digesters of the BIOTEC RAC model generates 15 m3 de CH4 and 60 kWh per tonne of fruit.

World Leader in oil palm mills waste water and by-products treatment since 1988.
Palm effluent biodigester in the world
(Palmeras del Llano, Colombia, 1988)
Palm effluent ferti-irrigation system using micro-sprinkler
(Palmar Santa Elena, Colombia 1992)
Covered lagoon Biodigester for POME
(Palmeiras, Colombia, 1999)
MDL Project (Gold Standard) for POME in the world
(Eecopalsa, Honduras, 2007)
Palm Effluent Ferti-Irrigation System by macro-drippers and remote monitoring
(Exportadora del Atlántico, Honduras, 2010)
Biodigester combined with POME and Biodiesel Effluent Treatment
(MANUELITA, Colombia, 2014)
POME bio-evapo-drying system
(Piloto plant, New Delhi, India, 2018)


The cane is the most important source of sugar in the world, as well as bio - ethanol, on par with corn.

While cane production is approaching 50 tons of dry matter per hectare per year, sugar and bioethanol production account together for 15 tons. The difference between these two numbers are the by-products (leaves, buds, bagasse, sludge, wastewater and vinasses) where the nutrients are exported and concentrated by the cane harvest. Some of them, such as bagasse, is an attractive biomass used as source of steam and electricity and in some cases as raw material for paper. Good management of these by-products in their entirety is an opportunity for agribusiness to obtain value-added to its core business and ensure long-term sustainability.

BIOTEC brings industry knowledge and experience in the handling of organic by-products to the cane industry, mainly composting of the filter mud cake (with or without vinasses), biodigestion of vinasses with energy production through biogas (steam, electricity, bio-methane), treatment / wastewater use and organic fertilization.

When vinasses represent a major problem, BIOTEC offers its bio-evapo-drying solution, transforming them into soluble or insoluble, powdered or granulated, high value marketable bio-fertilizer. To increase the profitability of this kind of projects, filter cake (mud) can be used as a complement for higher production of gas and fertilizer.


Sugarcane products and services
Sugar mills Treatment and use of by-products and effluents
Distilleries MManagement of vinasses by composting or biodigestion (with/without evapo-drying)
Crops Liquid and solid organic fertilisation

Finally, BIOTEC promotes the organic fertilisation of sugarcane plantations with: filter mud cake, compost, purge of biodigesters sludge and treated vinasses. For the sugarcane industry, these technologies represent additional business opportunities. This set of solutions, ensure a sustainable business management.


Currently, consumers increasingly worry about what they consume, and are aware of the importance of a healthy lifestyle that also respects the environment. In this environment the overall trend shows a significant increase of the consumption of fruits and derivatives such as citrus fruit juices. As the production increases to meet this demand, so does the generation of solid by-products (pulps and peels) and liquids (effluents). With the experience of BIOTEC, these by-products (usually considered as waste) are converted in raw materials for renewable energy and fertilization.

BIOTEC proposes its integrated management of waste to handle and add value to the by-products created during the process of extracting the juice and essential oils from lemon, tangerine, lime and orange.

The acidic effluents from the process of citrus fruits, as well as the husks, skins and seeds can be used to generate biogas to meet thermal energy demand of this agro-industry (replacing fossil fuels). Additionallity the biodigestate can be recycled to fertilize the plantation.

Pioneers in citrus effluents
Large-scale digester in the world for lemon anaerobic effluent treatment
Citrusvil, Argentina , 2009: 11,000 m3 of effluent/day x 11,000 ppm COD
Biogas generation for boiler of 6 and 10 T of steam per hour + ferti-irrigation 600 ha.
Large-scale digester in the world for lemon anaerobic effluent treatment
2018-2019 R&D in laboratory and biogas generation plant
with husk, skins and lemon seeds to generate gas in inter-harvest.

Our scope:

Wastewater treatment

Use of biogas energy (thermal and electrical)

Composting of garden waste, leaves and pulp

Biodigestion of husk, skin and seed.

Liquid fertilization of plantations with treated effluent


BIOTEC offers customised solutions for other types of effluents and organic waste

such as:

  • Livestock, swine and poultry
  • Yeast industry
  • Paper industry
  • Starch industry (manioc and corn)
  • Livestock slaughterhouses and rendering plants
  • Urban waste water

Energy Crops

The historical purpose of BIOTEC has been to transform the agro-industrial by-products into main raw materials, fertilizer and in energy (biogas), adapting to the Tropic the European experience in biodigestión of grass silage and corn. However, the world needs much more energy than the by-products and agro-industrial effluents can produce. Many regions of the world which do not have any electricity, or that only have diesel power plants, are coincidentally located in tropical areas, with high availability of land and few opportunities to market agricultural products. For this reason, BIOTEC has decided to focus its R & D efforts in the production of energy (biogas) from tropical grasses and forages ("energy" crops for the Tropics and "Southern Cone" of Latin America).

The generation of biogas from biomass, for later use in power plants, differs from the combustion of biomass in boilers for generation of steam and electricity with steam turbines. This second option, relatively common in the world, takes advantage of the Rankin cycle, and is limited by two key constraints:

  1. Burning organic matter wastes the nutrients it contains. It requires important inputs of chemical fertiliser to keep the crops growing.
  2. Large power plants are required (over 40 MW) to have acceptable electrical performance, economies of scale and a minimum return on investment.


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Biogas from energy crops

Our scope:

Setup of grass and forage farms

Grass and forage biodigesters implementation

Renewable natural gas and electricity generation

Biodigestion of husks, skins and seeds.