Treating anaerobic effluents using forward osmosis for combined water purification and biogas production

Carina Schneider, Rajath Sathyadev Rajmohan, Agata Zarebska, Panagiotis Tsapekos, Claus Hélix-Nielsen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Forward osmosis (FO) can be used to reclaim nutrients and high-quality water from wastewater streams. This could potentially contribute towards relieving global water scarcity. Here we investigated the feasibility of extracting water from four real and four synthetic anaerobically digested effluents, using FO membranes. The goal of this study was to 1) evaluate FO membrane performance in terms of water flux and nutrient rejection 2) examine the methane yield that can be achieved and 3) analyse FO membrane fouling. Out of the four tested real anaerobically digested effluents, swine manure and potato starch wastewater achieved the highest combined average FO water flux (>3 liter per square meter per hour (LMH) with 0.66 M MgCl2 as initial draw solution concentration) and methane yield (>300 mL CH4 per gram of organic waste expressed as volatile solids (VS)). Rejection of total ammonia nitrogen (TAN), total Kjeldahl nitrogen (TKN) and total phosphorous (TP) was high (up to 96.95%, 95.87% and 99.83%, respectively), resulting in low nutrient concentrations in the recovered water. Membrane autopsy revealed presence of organic and biological fouling on the FO membrane. However, no direct correlation between feed properties and methane yield and fouling potential was found, indicating that there is no inherent trade-off between high water flux and high methane production.
Original languageEnglish
JournalScience of the Total Environment
Volume647
Pages (from-to)1021-1030
ISSN0048-9697
DOIs
Publication statusPublished - 2019

Keywords

  • Anaerobic digestion
  • Biogas production
  • Fouling
  • Wastewater treatment
  • Water reclamation

Cite this

@article{d27c528474a04210a185ecba33d88e30,
title = "Treating anaerobic effluents using forward osmosis for combined water purification and biogas production",
abstract = "Forward osmosis (FO) can be used to reclaim nutrients and high-quality water from wastewater streams. This could potentially contribute towards relieving global water scarcity. Here we investigated the feasibility of extracting water from four real and four synthetic anaerobically digested effluents, using FO membranes. The goal of this study was to 1) evaluate FO membrane performance in terms of water flux and nutrient rejection 2) examine the methane yield that can be achieved and 3) analyse FO membrane fouling. Out of the four tested real anaerobically digested effluents, swine manure and potato starch wastewater achieved the highest combined average FO water flux (>3 liter per square meter per hour (LMH) with 0.66 M MgCl2 as initial draw solution concentration) and methane yield (>300 mL CH4 per gram of organic waste expressed as volatile solids (VS)). Rejection of total ammonia nitrogen (TAN), total Kjeldahl nitrogen (TKN) and total phosphorous (TP) was high (up to 96.95{\%}, 95.87{\%} and 99.83{\%}, respectively), resulting in low nutrient concentrations in the recovered water. Membrane autopsy revealed presence of organic and biological fouling on the FO membrane. However, no direct correlation between feed properties and methane yield and fouling potential was found, indicating that there is no inherent trade-off between high water flux and high methane production.",
keywords = "Anaerobic digestion, Biogas production, Fouling, Wastewater treatment, Water reclamation",
author = "Carina Schneider and Rajmohan, {Rajath Sathyadev} and Agata Zarebska and Panagiotis Tsapekos and Claus H{\'e}lix-Nielsen",
year = "2019",
doi = "10.1016/j.scitotenv.2018.08.036",
language = "English",
volume = "647",
pages = "1021--1030",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier",

}

Treating anaerobic effluents using forward osmosis for combined water purification and biogas production. / Schneider, Carina; Rajmohan, Rajath Sathyadev; Zarebska, Agata; Tsapekos, Panagiotis; Hélix-Nielsen, Claus.

In: Science of the Total Environment, Vol. 647, 2019, p. 1021-1030.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Treating anaerobic effluents using forward osmosis for combined water purification and biogas production

AU - Schneider, Carina

AU - Rajmohan, Rajath Sathyadev

AU - Zarebska, Agata

AU - Tsapekos, Panagiotis

AU - Hélix-Nielsen, Claus

PY - 2019

Y1 - 2019

N2 - Forward osmosis (FO) can be used to reclaim nutrients and high-quality water from wastewater streams. This could potentially contribute towards relieving global water scarcity. Here we investigated the feasibility of extracting water from four real and four synthetic anaerobically digested effluents, using FO membranes. The goal of this study was to 1) evaluate FO membrane performance in terms of water flux and nutrient rejection 2) examine the methane yield that can be achieved and 3) analyse FO membrane fouling. Out of the four tested real anaerobically digested effluents, swine manure and potato starch wastewater achieved the highest combined average FO water flux (>3 liter per square meter per hour (LMH) with 0.66 M MgCl2 as initial draw solution concentration) and methane yield (>300 mL CH4 per gram of organic waste expressed as volatile solids (VS)). Rejection of total ammonia nitrogen (TAN), total Kjeldahl nitrogen (TKN) and total phosphorous (TP) was high (up to 96.95%, 95.87% and 99.83%, respectively), resulting in low nutrient concentrations in the recovered water. Membrane autopsy revealed presence of organic and biological fouling on the FO membrane. However, no direct correlation between feed properties and methane yield and fouling potential was found, indicating that there is no inherent trade-off between high water flux and high methane production.

AB - Forward osmosis (FO) can be used to reclaim nutrients and high-quality water from wastewater streams. This could potentially contribute towards relieving global water scarcity. Here we investigated the feasibility of extracting water from four real and four synthetic anaerobically digested effluents, using FO membranes. The goal of this study was to 1) evaluate FO membrane performance in terms of water flux and nutrient rejection 2) examine the methane yield that can be achieved and 3) analyse FO membrane fouling. Out of the four tested real anaerobically digested effluents, swine manure and potato starch wastewater achieved the highest combined average FO water flux (>3 liter per square meter per hour (LMH) with 0.66 M MgCl2 as initial draw solution concentration) and methane yield (>300 mL CH4 per gram of organic waste expressed as volatile solids (VS)). Rejection of total ammonia nitrogen (TAN), total Kjeldahl nitrogen (TKN) and total phosphorous (TP) was high (up to 96.95%, 95.87% and 99.83%, respectively), resulting in low nutrient concentrations in the recovered water. Membrane autopsy revealed presence of organic and biological fouling on the FO membrane. However, no direct correlation between feed properties and methane yield and fouling potential was found, indicating that there is no inherent trade-off between high water flux and high methane production.

KW - Anaerobic digestion

KW - Biogas production

KW - Fouling

KW - Wastewater treatment

KW - Water reclamation

U2 - 10.1016/j.scitotenv.2018.08.036

DO - 10.1016/j.scitotenv.2018.08.036

M3 - Journal article

VL - 647

SP - 1021

EP - 1030

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

ER -