Essays about: "woodchip"

Found 5 essays containing the word woodchip.

  1. 1. Some Like It Hot: Pre-heating Prior to Bioreactor Treatment Enhances Nitrogen Removal From Mine Drainage

    University essay from Uppsala universitet/Luft-, vatten- och landskapslära

    Author : Laura Nina Bettoni; [2022]
    Keywords : denitrification; nitrate removal; temperature; woodchip bioreactor; waste rock leachate;

    Abstract : Ammonium-nitrate based explosives (NH4NO3) used within the operations of Kiruna iron ore mine release nitrate (NO3-) into the environment, potentially having adverse effects on local river-systems. One way of reducing NO3- impacts to the environment is through a woodchip denitrifying bioreactor (DBR). READ MORE

  3. 2. Comparison of Different Wood Types for Use as a Porous Substrate in Denitrifying Woodchip Bioreactors

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Erica Erikson; [2021]
    Keywords : denitrification; woodchip bioreactor; column experiments; denitrifikation; träflis-bioreaktor; kolonnexperiment;

    Abstract : Explosives used in the mining industry release nitrate into the environment, causing concerns for the water quality in local river-systems. One way of reducing the nitrate loading into the environment is through a woodchip bioreactor. READ MORE

  4. 3. Spatial and temporal changes in microbial community composition in a full-scale woodchip bioreactor for treating mine water

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Felicia Wallnäs; [2020]
    Keywords : ;

    Abstract : Incomplete detonation of nitrogen-based explosives can lead to abundant levels of nitrate in mine groundwater. The possibility of reducing nitrogen levels from the wastewater through denitrification, anammox and DNRA has been investigated using a full-scale bioreactor. The bioreactor is situated subsurface and is filled with pine woodchips. READ MORE

  5. 4. Träflis som jordförbättring : Effekt, användning, och metod

    University essay from SLU/Dept. of Biosystems and Technology (from 130101)

    Author : Solveig Lokøen Knudsen; [2018]
    Keywords : woodchip; compost; ramial chipped wood; soil amendment; soil organic matter;

    Abstract : En intensifiering av jordbruket kan hota bördigheten i många jordar och ger ett behov för åtgärder som kan förbättra den långsiktiga bördigheten på ett effektivt sätt. Jordförbättring vid tillföring av organiskt material har visats ge flera positiva effekter på jordens fysiska, biologiska och kemiska egenskaper. READ MORE

  6. 5. Power and Methanol Production from Biomass Combined With Solar and Wind Energy : Analysis and Comparison

    University essay from KTH/Kraft- och värmeteknologi

    Author : Husni Firmansyah; [2018]
    Keywords : ;

    Abstract : The purpose of this work is to investigate the feasibility of an integrated system consisting of biomass-based power generation built-in with carbon capture technology combined with a water electrolysis unit operated by solar cells and wind turbines to produce fuel through the methanol synthesis process. The configurations are examined both technically and economically to determine their feasibility, and subjected to sensitivity analysis to determine their economic viability and optimum performance. READ MORE