Removal of >10 µm Microplastic Particles from Treated Wastewater by a Disc Filter

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this paper, we evaluate the performance of a disc filter that retains microplastic (MP) particles from treated wastewater. A focal plane array-based Fourier transform infrared imaging technique enabled MP quantification and an in-house-built software (MPhunter) facilitated automatic analysis of the obtained infrared spectra. The disc filter retained 89.7% of particles, and 75.6% of their mass. This removal efficiency is comparable to removal rates reported by previous studies. However, the presence of an unexpectedly large number of MP particles whose size substantially exceeded the pore size of the disc filter suggests that particles could either bypass or pass through the filter mesh, somewhat diminishing the performance of the filter. The concentration of MPs in the effluent was 3 MP/L, corresponding to an estimated mass concentration of 0.31 µg/L. The annual MP discharge from the studied WWTP after the disc filter was estimated to be 1.1 kg in 2017. It was hence not a significant contributor to MP emissions in Denmark. Although the operation of the disc filter seems to have been disturbed, it nonetheless achieved a high MP removal rate. Therefore, we conclude that it is a suitable technology to decrease the concentration of discharged MPs in wastewater effluents
Original languageEnglish
Article number1935
JournalWater
Volume11
Issue number9
ISSN2073-4441
DOIs
Publication statusPublished - 17 Sep 2019

Fingerprint

Waste Water
wastewater
Wastewater
plastics
filter
Effluents
Fourier Analysis
Denmark
quantification
Particle Size
performance
Focal plane arrays
Software
Infrared imaging
Technology
efficiency
Pore size
Fourier transforms
effluents
Particle size

Keywords

  • microplastic
  • disc filter
  • wastewater
  • FT-IR spectroscopy

Cite this

@article{c94781c269d84fa889b4f9aba78d5a5d,
title = "Removal of >10 µm Microplastic Particles from Treated Wastewater by a Disc Filter",
abstract = "In this paper, we evaluate the performance of a disc filter that retains microplastic (MP) particles from treated wastewater. A focal plane array-based Fourier transform infrared imaging technique enabled MP quantification and an in-house-built software (MPhunter) facilitated automatic analysis of the obtained infrared spectra. The disc filter retained 89.7{\%} of particles, and 75.6{\%} of their mass. This removal efficiency is comparable to removal rates reported by previous studies. However, the presence of an unexpectedly large number of MP particles whose size substantially exceeded the pore size of the disc filter suggests that particles could either bypass or pass through the filter mesh, somewhat diminishing the performance of the filter. The concentration of MPs in the effluent was 3 MP/L, corresponding to an estimated mass concentration of 0.31 µg/L. The annual MP discharge from the studied WWTP after the disc filter was estimated to be 1.1 kg in 2017. It was hence not a significant contributor to MP emissions in Denmark. Although the operation of the disc filter seems to have been disturbed, it nonetheless achieved a high MP removal rate. Therefore, we conclude that it is a suitable technology to decrease the concentration of discharged MPs in wastewater effluents",
keywords = "microplastic, disc filter, wastewater, FT-IR spectroscopy",
author = "Marta Simon and Alvise Vianello and Jes Vollertsen",
year = "2019",
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doi = "doi.org/10.3390/w11091935",
language = "English",
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Removal of >10 µm Microplastic Particles from Treated Wastewater by a Disc Filter. / Simon, Marta; Vianello, Alvise; Vollertsen, Jes.

In: Water, Vol. 11, No. 9, 1935, 17.09.2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Removal of >10 µm Microplastic Particles from Treated Wastewater by a Disc Filter

AU - Simon, Marta

AU - Vianello, Alvise

AU - Vollertsen, Jes

PY - 2019/9/17

Y1 - 2019/9/17

N2 - In this paper, we evaluate the performance of a disc filter that retains microplastic (MP) particles from treated wastewater. A focal plane array-based Fourier transform infrared imaging technique enabled MP quantification and an in-house-built software (MPhunter) facilitated automatic analysis of the obtained infrared spectra. The disc filter retained 89.7% of particles, and 75.6% of their mass. This removal efficiency is comparable to removal rates reported by previous studies. However, the presence of an unexpectedly large number of MP particles whose size substantially exceeded the pore size of the disc filter suggests that particles could either bypass or pass through the filter mesh, somewhat diminishing the performance of the filter. The concentration of MPs in the effluent was 3 MP/L, corresponding to an estimated mass concentration of 0.31 µg/L. The annual MP discharge from the studied WWTP after the disc filter was estimated to be 1.1 kg in 2017. It was hence not a significant contributor to MP emissions in Denmark. Although the operation of the disc filter seems to have been disturbed, it nonetheless achieved a high MP removal rate. Therefore, we conclude that it is a suitable technology to decrease the concentration of discharged MPs in wastewater effluents

AB - In this paper, we evaluate the performance of a disc filter that retains microplastic (MP) particles from treated wastewater. A focal plane array-based Fourier transform infrared imaging technique enabled MP quantification and an in-house-built software (MPhunter) facilitated automatic analysis of the obtained infrared spectra. The disc filter retained 89.7% of particles, and 75.6% of their mass. This removal efficiency is comparable to removal rates reported by previous studies. However, the presence of an unexpectedly large number of MP particles whose size substantially exceeded the pore size of the disc filter suggests that particles could either bypass or pass through the filter mesh, somewhat diminishing the performance of the filter. The concentration of MPs in the effluent was 3 MP/L, corresponding to an estimated mass concentration of 0.31 µg/L. The annual MP discharge from the studied WWTP after the disc filter was estimated to be 1.1 kg in 2017. It was hence not a significant contributor to MP emissions in Denmark. Although the operation of the disc filter seems to have been disturbed, it nonetheless achieved a high MP removal rate. Therefore, we conclude that it is a suitable technology to decrease the concentration of discharged MPs in wastewater effluents

KW - microplastic

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