In this article we consider the recent developments in liquid digestate evaporation technology, where evaporators can either be used to improve the marketability of the liquid digestate output from biogas plants by heat pasteurization, or by reducing volume the digestate to reduce disposal costs.
Digestate in its raw form straight from the digester, is a heavy form of fertilizer, to transport to markets and the result of that is to make it expensive to deliver to markets which may be remote from the biogas plant.
So, the sale of digestate in its much lighter and more concentrated crystaline form, after evaporation, may make commercial sense if the digestate is created in a region abundant in AD Plants such as a dairy farming region, but sold for use on arable land.
At the core of the HRS digestate process is an evaporation plant using HRS patented scraped surface evaporator technology that is self-cleaning and guarantees uninterrupted operation for periods of over 6 months.
Digestate treatment from codigestion of pork or cow manure with biomass using vacuum evaporators. Results are 95% of clean water and fertilizers to be reused…
… plants for Evaporators and treatment of primary and waste waters of many industrial fields – between that mechanical, painting, plating, chemical and pharmaceutical, food and agro industry – of digestate and Evaporators …
The Barkip plant will be the first of its kind to incorporate a novel digestate processing stage: Waste heat from the CHP engines is used to concentrate the liquid fraction of the digestate into a nutrient rich liquid fertilizer. Under the terms of the contract, the HRS technology will enable the Barkip Anaerobic Digestion plant to process 75,000 tonne’s of waste annually, in a plant setup that produces around 2.5MW of renewable electricity which will contribute towards Scotland’s renewable energy industry.