Home About Browse Search
Svenska


Simulating water and pollutant transport in bark, charcoal and sand filters for greywater treatment

Ciuk Karlsson, Susanna (2015). Simulating water and pollutant transport in bark, charcoal and sand filters for greywater treatment. Uppsala : Sveriges lantbruksuniv. , Rapport / Institutionen för energi och teknik, SLU, 1654-9406 ; 085
ISBN 978-91-576-9324-2
eISBN 978-91-576-9325-9
[Licentiate thesis]

[img]
Preview
PDF
1MB

Abstract

A septic tank combined with a sand filter is the most common onsite wastewater treatment system worldwide, since it is a simple, lowcost and reliable treatment method. Alternatives to sand in filters could be advantageous in terms of availability of material and enhanced treatment properties.

In this study, flow dynamics and pollutant transport in three filter materials; sand, pine bark and activated charcoal, intermittently dosed with artificial greywater, were simulated using the HYDRUS wetland module. The simulated results were compared with observations from laboratory filters and model hydraulic and microbial parameters were calibrated. Emphasis was placed on simulating the removal of organic pollutants by each filter type. Furthermore, for the bark and charcoal filters, removal of organic matter was simulated for different hydraulic and organic loading rates (HLR = 32 and 64 l m⁻² day⁻¹ and OLR = 13-6 and 28 g BOD₅ m⁻² day⁻¹).

Comparing simulated with measured cumulated effluent volume, the normalised root mean square error for all three filter materials was small (0.7-3.5%). The simulated bark filter COD removal in different loading regimes (HLR = 32 and 64 l m⁻² day⁻¹, OLR = 13-16 and 28 g BOD₅ m⁻² day⁻¹) was overestimated by 13-20 percentage points compared with the measured values. When release of organic matter from the bark material itself was accounted for, the difference was reduced to 2-10 percentage points. Simulation of the charcoal filter demonstrated 94 and 91 % removal of COD for HLR = 32 and OLR = 13 - 16 g BOD₅ m⁻² day⁻¹, which compared well with the measured values, 95 ± 2 % and 89 ± 11 %, respectively. However, simulated COD removal for Run 2 (70%) and Run 5 (72%) was low compared with the measured values (90 ± 7 and 84 ± 4 %). The measured sand filter effluent concentration of COD was 245 mg l⁻¹ and the simulated effluent concentration of COD was 134 mg l⁻¹ for HLR = 32 and OLR = 14 g BOD₅ m⁻² day⁻¹. After including an effect of water flow along the column wall in the model, the simulated effluent concentration of COD was 337 mg l⁻¹.

These simulations of bark, charcoal and sand filters improved understanding of filter functions and identified possible filter design developments.

Authors/Creators:Ciuk Karlsson, Susanna
Title:Simulating water and pollutant transport in bark, charcoal and sand filters for greywater treatment
Series/Journal:Rapport / Institutionen för energi och teknik, SLU (1654-9406)
Year of publishing :15 June 2015
Depositing date:30 June 2015
Volume:085
Number of Pages:89
Papers/manuscripts:
NumberReferences
ISusanna Ciuk Karlsson, Langergraber, G., Pell, M., Dalahmeh, S., Vinnerås, B., Jönsson H. (2015). Simulation and verification of hydraulic properties and organic matter degradation in sand filters for greywater treatment. Water Science and Technology 71, 426-433.
IISusanna Ciuk Karlsson, Langergraber, G., Pell, M., Dalahmeh, S., Jönsson, H. (2015). Simulation of water flow and organic matter removal in bark and charcoal filters for greywater treatment (Manuscript). Submitted.
Place of Publication:Uppsala
Publisher:Department of Energy and Technology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-9324-2
ISBN for electronic version:978-91-576-9325-9
ISSN:1654-9406
Language:English
Publication Type:Licentiate thesis
Full Text Status:Public
Agris subject categories.:P Natural resources > P10 Water resources and management
U Auxiliary disciplines > U10 Mathematical and statistical methods
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 101 Mathematics > 10101 Mathematical Analysis
(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 201 Civil Engineering > Water Engineering
(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 208 Environmental Biotechnology > Bioremediation
Agrovoc terms:wastewater, wastewater treatment, filters, bark, sand, charcoal, activated carbon, organic matter, pollutants, bioremediation, simulation, models
Keywords:activated charcoal, greywater, HYDRUS wetland module, organic matter removal, pine bark, sand, simulation, vertical flow filter
URN:NBN:urn:nbn:se:slu:epsilon-e-2791
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2791
ID Code:12417
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Energy and Technology
External funders:FORMAS
Deposited By: Susanna Ciuk Karlsson
Deposited On:30 Jul 2015 08:05
Metadata Last Modified:08 Sep 2017 09:19

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits