Essays about: "växtnäringsämnen"

Showing result 11 - 14 of 14 essays containing the word växtnäringsämnen.

  1. 11. Användning av rötrest från kombinerad etanol och biogasproduktion : en jämförelse mellan tre alternativ

    University essay from SLU/Dept. of Energy and Technology

    Author : Isak Albertsson; [2008]
    Keywords : rötrest; etanol; biogas; hanteringssystem; miljöpåverkan; energiförbrukning; ekonomi;

    Abstract : Scandinavian Biogas is involved in the planning of a combined ethanol and biogas factory in Karlskoga, Sweden. Besides biogas and ethanol large amounts of digester residues will be produced, about 450 000 liquid tonnes residue (~7,3 % Dry Substance( DS)). READ MORE

  3. 12. Återföring av växtnäringsämnen från avloppsvatten till åkermark : en bedömning av intresset för nya näringsrika produkter

    University essay from SLU/Dept. of Soil Sciences

    Author : Ulrica Broström; [2007]
    Keywords : växtnäringsämnen; avloppsvatten; åkermark;

    Abstract : Sewage sludge contains plant nutrients and has earlier been utilised as fertilizer to cropland. Unfortunately not only plant nutrients but also heavy metals, pathogens and organic contaminants tend to accumulate in sludge. The suitability to use sewage sludge in agriculture has therefore been subject to several discussions over the years. READ MORE

  4. 13. Enskilda avloppsanläggningar med fosforbindning i Stockholms län : en miljösystemanalys med metodik från livscykelanalys

    University essay from Institutionen för geovetenskaper

    Author : Philipp Weiss; [2007]
    Keywords : Small-scale wastewater treatment; environmental systems analysis; life cycle assesment; phosphorus removal; filter beds; chemical precipitation; infiltration;

    Abstract : Modern, small-scale wastewater treatment faces a twofold challenge: On the one hand requirements from legal authorities regarding removal of eutrophying substances have become more demanding. On the other hand high-quality phosphorus reserves are dwindling, which has raised calls for increased recycling. READ MORE

  5. 14. Conservation agriculture in Babati District, Tanzania : impacts of conservation agriculture for small-scale farmers and methods for increasing soil fertility

    University essay from SLU/Dept. of Soil Sciences

    Author : Fredrik Löfstrand; [2005]
    Keywords : Tanzania; Babati district; conservation agriculture; reduced tillage; cover crops; soil fertility; faidherbia albida; rural development;

    Abstract : People mainly rely on the agricultural sector in the poorest countries of the world. An increased agricultural production can therefore have a great impact on individuals as well as on whole communities in many countries. A majority of the Tanzanians live in rural areas and rely on the agricultural sector. READ MORE