Digestate Treatment

Digestate treatment technology improves the application of the valuable nutrients in the digestate. Biowatt-Biogas® offers various digestate separation technologies as well as sanitation and nutrient recovery.

Sanitation

Depending on the type of feedstock, sanitation of the feedstock may be required, feedstocks such as slaughterhouse waste or food waste. The sanitation technology is tailor-made and designed to meet project specifications. With the option of different temperatures (55, 70, or 130 degrees) and tank sizes. Together the customizable technologies lead to the ideal approach for every project.

Features

Possibility of sanitation at different temperatures
Different tank sizes
Heat recovery after sanitation

Digestate separation

Digestate separation is an essential process in biogas and biomass energy plants, aimed at separating the solid and liquid fractions of digestate produced after anaerobic digestion. The liquid fraction is rich in nutrients such as nitrogen, phosphorus, and potassium, making it suitable as a liquid fertilizer for agricultural use. The solid fraction, on the other hand, contains organic matter and can be further processed into bio-fertilizer, compost, or even used as a soil amendment.
By applying separation technology, operators can improve nutrient management, reduce transportation costs, and minimize environmental risks associated with direct digestate application. Moreover, digestate separation helps optimize resource utilization and supports sustainable circular economy practices in renewable energy projects.

Application of digestate

After the separation, the liquid fraction of the digestate can be applied to the field. If desired, the liquid fraction can be further treated with ammonia stripper for the production of ammonium sulfate. The separation of digestate improves further processing and usability as a bio-fertilizer, based on the requirement of the digestate, the most suitable technology will be selected.