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Träfflista för sökning "hsv:(TEKNIK OCH TEKNOLOGIER) hsv:(Samhällsbyggnadsteknik) hsv:(Miljöanalys och bygginformationsteknik) ;pers:(Jönsson Håkan)"

Sökning: hsv:(TEKNIK OCH TEKNOLOGIER) hsv:(Samhällsbyggnadsteknik) hsv:(Miljöanalys och bygginformationsteknik) > Jönsson Håkan

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1.
  • Jönsson, Håkan, et al. (författare)
  • The Swedish experience with source separation
  • 2013
  • Ingår i: Source separation and decentralization for wastewater management. - 9781843393481 ; , s. 415-422
  • Bokkapitel (refereegranskat)
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2.
  • Jönsson, Håkan, et al. (författare)
  • Återvinn fler näringsämnen än fosfor i avloppsvatten
  • 2012
  • Ingår i: Dagens nyheter. - 1101-2447. ; ?, s. 6-
  • Annan publikation (populärvet., debatt m.m.)abstract
    • För att minska utsläppen av växthusgaser bör vi återvinna fler växt­näringsämnen ur avloppsslammet. Regeringens ensidiga fokus på fosfor i detta avseende riskerar att skada det långsiktiga miljöarbetet. Vi vill skärpa miljömålen och inkludera även ämnen som kväve, kalium och svavel, skriver professorer och forskare från SLU.
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4.
  • Lalander, Cecilia, et al. (författare)
  • Hygienic quality of artificial greywater subjected to aerobic treatment: a comparison of three filter media at increasing organic loading rates
  • 2013
  • Ingår i: Environmental Technology. - : Informa UK Limited. - 0959-3330 .- 1479-487X. ; 34, s. 2657-2662
  • Tidskriftsartikel (refereegranskat)abstract
    • With a growing world population, the lack of reliable water sources is becoming an increasing problem. Reusing greywater could alleviate this problem. When reusing greywater for crop irrigation it is paramount to ensure the removal of pathogenic organisms. This study compared the pathogen removal efficiency of pine bark and activated charcoal filters with that of conventional sand filters at three organic loading rates. The removal efficiency of Escherichia coli O157:H7 decreased drastically when the organic loading rate increased fivefold in the charcoal and sand filters, but increased by 2log (10) in the bark filters. The reduction in the virus model organism coliphage phi X174 remained unchanged with increasing organic loading in the charcoal and sand filters, but increased by 2log (10) in the bark filters. Thus, bark was demonstrated to be the most promising material for greywater treatment in terms of pathogen removal.
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5.
  • Spångberg, Johanna, et al. (författare)
  • Environmental impact of recycling nutrients in human excreta to agriculture compared with enhanced wastewater treatment
  • 2014
  • Ingår i: Science of the Total Environment. - : Elsevier BV. - 0048-9697 .- 1879-1026. ; 493, s. 209-219
  • Tidskriftsartikel (refereegranskat)abstract
    • Human excreta are potential sources of plant nutrients, but are today usually considered a waste to be disposed of. The requirements on wastewater treatment plants (WWTPs) to remove nitrogen and phosphorus are increasing and to meet these requirements, more energy and chemicals are needed by WWTPs. Separating the nutrient-rich wastewater fractions at source and recycling them to agriculture as fertiliser is an alternative to removing them at the WWTP. This study used life cycle assessment methodology to compare the environmental impact of different scenarios for recycling the nutrients in the human excreta as fertiliser to arable land or removing them in an advanced WWTP. Three scenarios were assessed. In blackwater scenario, blackwater was source-separated and used as fertiliser. In urine scenario, the urine fraction was source-separated and used as fertiliser and the faecal water treated in an advanced WWTP. In NP scenario, chemical fertiliser was used as fertiliser and the toilet water treated in an advanced WWTP. The emissions from the WWTP were the same for all scenarios. This was fulfilled by the enhanced reduction in the WWTP fully removing the nutrients from the excreta that were not source-separated in the NP and urine scenarios. Recycling source-separated wastewater fractions as fertilisers in agriculture proved efficient for conserving energy and decreasing global warming potential (GWP). However, the blackwater and urine scenarios had a higher impact on potential eutrophication and potential acidification than the WWTP-chemical fertiliser scenario, due to large impacts by the ammonia emitted from storage and after spreading of the fertilisers. The cadmium input to the arable soil was very small with urine fertiliser. Source separation and recycling of excreta fractions as fertiliser thus has potential for saving energy and decreasing GWP emissions associated with wastewater management. However, for improved sustainability, the emissions from storage and after spreading of these fertilisers must decrease. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).
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  • Resultat 1-5 av 5

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