Essays about: "digestate"

Showing result 1 - 5 of 38 essays containing the word digestate.

  1. 1. Small-scale biogas production from organic waste and application in mid-income countries – a case study of a Lebanese community

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Sebastian Huber; [2019]
    Keywords : Sustainable Development; Lebanon; small-scale; biogas production; organic waste; liquid digestate; anaerobic digestion; feasibility study;

    Abstract : The controlled anaerobic digestion of organic waste in a biogas facility aggregates advantages of waste treatment, energy recovery and nutrient recycling and is a promising technology to deal with contemporary issues of waste management and energy recovery. Small-scale biogas production units can be simply designed and successfully operated even in settings where means for advanced technology equipment are low and institutional capacities limited. READ MORE

  2. 2. Analysis of the distribution of plant nutrients in a biogas production system : a look at VH Biogas, co-digesting manure from several farms

    University essay from SLU/Dept. of Soil and Environment

    Author : André Johansson; [2019]
    Keywords : biogas; digestate; manure; nutrients;

    Abstract : This study examined nutrient flows in a system where 20 farms deliver manure to a biogas plant for digestion, and then receive digestate back. Some other substrates were also anaerobically digested at the plant e.g. slaughter residues. READ MORE

  3. 3. Multi-criteria assessment of biomethane production from waste and residual feedstocks of Emilia-Romagna (Italy)

    University essay from SLU/Dept. of Energy and Technology

    Author : Giovanni Zanaroli; [2019]
    Keywords : biomethane; nutrients recycling; anaerobic digestion; multi-criteria assessment; transport;

    Abstract : Biomethane can be produced by anaerobic digestion of residues or wastes and it can be used as a renewable fuel for transport. It is associated with reduced GHG emissions, offsetting of fossil fuels and of mineral fertilizers, waste management and nutrient recycling in agriculture. READ MORE

  4. 4. Long-term application of digestate and biofuel ash to arable soil : effects on the solubility of Cd, Al and trace metals as evidenced by simulated scenarios

    University essay from SLU/Dept. of Soil and Environment

    Author : Elias Bäckström; [2018]
    Keywords : cadmium; fertilizer; Visual MINTEQ;

    Abstract : The importance of nutrient recycling could not be emphasized enough in to-day’s society. Reduction of waste as well as recycling of nutrients would be the result if ash and biogas digestate could be used as fertilizer. However, the solubility of Cd, Al and micronutrients might be affected in a different way than by standard fertilizers. READ MORE

  5. 5. Arbuscular mycorrhizal fungi in spring wheat : impact of waste-based fertilizers

    University essay from SLU/Dept. of Soil and Environment

    Author : Julia Dahlqvist; [2018]
    Keywords : digestate; ash; Cd; cadmium; circular economy; phosphorus; Glomeromycota; quantitative polymerase chain reaction; qPCR; microscope; field; pH; Quarna;

    Abstract : Phosphate rock is a diminishing source of phosphorus (P) for crop production. Other sources are being investigated to replace it, for example bio-ash from wood combustion and biogas digestate from house hold wastes. Ash and digestate application have resulted in increased yields, but the effect on the soil biota has been somewhat varied. READ MORE