Sammanfattning

Hydrothermal carbonization (HTC) can be used to break down sludge structure and generate carbonaceous hydrochar suitable for solid fuel or value-added material applications. The separation of char and the reaction medium however generates a filtrate, which needs to treated before potential discharge. Thus, this work determined filtrate properties based on HTC temperature and sludge moisture content and estimated the discharge emissions and the potential increase in analyte loads to an industrial wastewater treatment plant based on derived regression models. Direct discharge of HTC filtrate would significantly increase effluent emissions at the mill, indicating the filtrate treatment is crucial for the future implementation of HTC at pulp and paper mills. Recycling the HTC filtrate to the wastewater plant would lead to only a nominal increase in effluent flow, but would increase the suspended solids, BOD, COD and total nitrogen loads by 0.1-0.8%, 3.8-5.3%, 2.7-3.1% and 42-67%, respectively, depending on HTC temperature.

Nyckelord

Biosolids; Experimental design; Hydrothermal treatment; Multiple linear regression; Principal component analysis; Wastewater treatment

Publicerad i

Bioresource Technology
2018, Volym: 263, sidor: 654-659
Utgivare: ELSEVIER SCI LTD

SLU författare

• Mäkelä, Mikko

  • Institutionen för skogens biomaterial och teknologi, Sveriges lantbruksuniversitet
    
  • Aalto-universitetet

• Larsson, Sylvia

  • Institutionen för skogens biomaterial och teknologi, Sveriges lantbruksuniversitet
    

Globala målen

SDG12 Säkerställa hållbara konsumtions- och produktionsmönster


UKÄ forskningsämne

Bioenergi


Publikationens identifierare

DOI: https://doi.org/10.1016/j.biortech.2018.05.044

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/96144