Environmental assessment of digestate treatment technologies using LCA methodology

Nutrient recovery technologies for anaerobic digestion systems: An overview

“…Additionally, the large amount of water (>80%) in digestates will increase transport expenses and difficult its utilization. To avoid negative impacts on the environment, complementary treatment of digestate are needed in context of nutrient surplus removal and/or recovery [43,44]. One of the simplest digestate post-treatment methods is the separation of the solid and the liquid fraction (known as digestate dewatering) [45,46].…”

“…Pelletized technology consists of digestate dried (e.i. fluidized bed dryer) following by mixing with a (NH 4 ) 2 SO 4 solution and pellets formation [43,61]. It has been shown that when digestate is converted to dry pelletized bagged products, digestate can reach a far greater price up €250/ton [60].…”

Marketing Green Fertilizers: Insights into Consumer Preferences

“…Numerous researchers have examined means of facilitating this approach [23][24][25], including upgrading solid digestate so it can be transported at reasonable cost and utilized in both agricultural and non-agricultural sectors [26,27]. But implementing cleaner digestate-based fertilizer production systems faces obstacles, meaning the economic and ecological benefits of using digestate remain largely unrealized [28].…”

Recovery of nutrients from biogas digestate with biochar and clinoptilolite

“…The number of biogas plants has rapidly increased over the last decades (Vázquez-Rowe et al, 2015). This has brought the need to improve techniques to handle digestate, the by-product of anaerobic digestion in biogas plants.…”

“…In the European Union (EU) the annual biogas production increased by 106% from 2006 to 2011, predominantly in countries such as Germany, Belgium and Italy (Vázquez-Rowe et al, 2015). The recent growth in number of biogas plants, hence, digestate produced, has led to restrictions in several EU countries, not only in the allowed nutrient input per hectare on agricultural land, but also in the fertiliser application periods to minimize nutrient leaching (Paavola & Rintala, 2008;Drosg et al, 2015).…”