SwePub
Sök i LIBRIS databas

  Utökad sökning

WFRF:(Karlsson Maria 1985)
 

Sökning: WFRF:(Karlsson Maria 1985) > The route towards s...

  • Ekstrand, Eva-Maria,1985-Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten (författare)

The route towards stable and efficient anaerobic digestion of fibrous wastewater from pulp and paper mills in high-rate CSTRs with sludge recirculation

  • Artikel/kapitelEngelska2015

Förlag, utgivningsår, omfång ...

  • 2015
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:liu-127023
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-127023URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:vet swepub-contenttype
  • Ämneskategori:kon swepub-publicationtype

Anmärkningar

  • The pulp and paper industry carries high costs in wastewater treatment. By combining present techniques with anaerobic digestion (AD), expenses for electricity use and sludge disposal can be reduced. The large wastewater volumes require high-rate systems sensitive to suspended solids, and this has so far excluded treatment of the energy-rich wood fibres. In this study, AD of fibrous wastewater was examined in high-rate CSTRs with sludge recirculation. Two lab-scale reactors (4L) were run for 780 days. Once a day, reactor sludge was withdrawn and centrifuged. The main part of the supernatant was discarded, while the pellet was suspended with the substrate and returned to the reactor. This gave a sludge retention time of 10-16 days and a hydraulic retention time of 4-8 days. One reactor (denoted R1) was fed with fibre sludge, and the second reactor (denoted R2) was co-digesting fibre sludge and activated sludge. Both substrates were taken from a Kraft mill in Sweden. Initially, both reactors experienced frequent drops in pH, and continuous alkali supplements were necessary for process stability. Additions of magnesium and potassium were also needed to obtain stable process performance at an OLR of 3 g VS L-1·day-1. R1 and R2 behaved similarly, but R2 (co-digestion) was more robust with less or no fluctuations in VFA and pH. Addition of activated sludge also to R1 allowed an increase in OLR to 4 g VS L-1·day-1. In summary, stable and efficient operation of a high-rate CSTR with sludge recirculation digesting fibre sludge was achieved at an OLR of 4 g VS L-1·day-1, a HRT of 4 days and a methane production of 260±20 Nml. In addition, co-digestion with activated sludge stabilized the performance at increased OLR and thus gave more methane produced per reactor volume.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Karlsson, MarielleLinköpings universitet,Tema vatten i natur och samhälle,Filosofiska fakulteten(Swepub:liu)marka26 (författare)
  • Truong, Xu-BinScandinavian Biogas (författare)
  • Björn, AnnikaLinköpings universitet,Tema Miljöförändring,Filosofiska fakulteten(Swepub:liu)annfr03 (författare)
  • Karlsson, AnnaScandinavian Biogas (författare)
  • Svensson, Bo H.Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten(Swepub:liu)bosv63 (författare)
  • Ejlertsson, JörgenScandinavian Biogas (författare)
  • Linköpings universitetTema Miljöförändring (creator_code:org_t)

Internetlänk

Till lärosätets databas

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy