Innovative Digestate Evaporation for Nutrient Recovery and Post-Processing
Recent expansion of AD technologies has increased the scale and total amount of anaerobic digestion plants worldwide.By contrast,land availability for digestate application is limited and transportation of surplus digestate away from production locations may be uneconomical.An excessive application ofdigestate,which usually contains significant loads of plant nutrients like nitrogen and phosphorous,may impair surface and groundwater resources due to nutrient runoff.Thus,AD plants located in nutrient-rich zones will be required to invest in digestate processing technologies that ensure proper handling and treatment of nutrients.This article introduces a new technology that allows an efficient recovery of nutrients by means of evaporation and increases the transport worthiness of digestate.A combination of solid-liquid separation,new sequential evaporation technology and reverse osmosis shows an energy demand of 7.82 kWhei/m3 Input.The proposed process enables a volume reduction of 49 % and converts digestate into a nutrient rich fertilizer with high transport and storage worthiness.
Digestate nutrient recovery sequential evaporation ammonia solution fertilizer
P.Stopp D.Weichgrebe K.-H.Rosenwinkel
Institute for Sanitary Engineering and Waste Management, Leibniz University Hannover, Welfengarten 1, 30167 Hannover, Germany
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
657-660
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）