Analysis and removal of assimilable organic carbon (AOC) from treated drinking water using a biological activated carbon filter system

Lou, Jie-Chung; Yang, Chih‐Yuan; Chang, Che-Jung; Chen, Wei–Hsiang; Tseng, Wei‐Bin; Han, Jianqiao

doi:10.1016/j.jece.2014.06.004

Cited by 11 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, Table S2 also supports the suggestion that the O 3 -BAC process was far superior to SF in removing BDOC. In addition, the O 3 -BAC process was also found to demonstrate unique performance in removing assimilable organic carbon (AOC) [ 30 , 31 ]. This effectively alleviates the problem of biological contamination of drinking water in the water supply pipeline.…”

Section: Resultsmentioning

confidence: 99%

Pilot Study on the Combination of Different Pre-Treatments with Nanofiltration for Efficiently Restraining Membrane Fouling While Providing High-Quality Drinking Water

Chen

Pang

et al. 2021

Membranes

View full text Add to dashboard Cite

Nanofiltration (NF) is a promising post-treatment technology for providing high-quality drinking water. However, membrane fouling remains a challenge to long-term NF in providing high-quality drinking water. Herein, we found that coupling pre-treatments (sand filtration (SF) and ozone–biological activated carbon (O3-BAC)) and NF is a potent tactic against membrane fouling while achieving high-quality drinking water. The pilot results showed that using SF+O3-BAC pre-treated water as the feed water resulted in a lower but a slowly rising transmembrane pressure (TMP) in NF post-treatment, whereas an opposite observation was found when using SF pre-treated water as the feed water. High-performance size-exclusion chromatography (HPSEC) and three-dimensional excitation–emission matrix (3D-EEM) fluorescence spectroscopy determined that the O3-BAC process changed the characteristic of dissolved organic matter (DOM), probably by removing the DOM of lower apparent molecular weight (LMW) and decreasing the biodegradability of water. Moreover, amino acids and tyrosine-like substances which were significantly related to medium and small molecule organics were found as the key foulants to membrane fouling. In addition, the accumulation of powdered activated carbon in O3-BAC pre-treated water on the membrane surface could be the key reason protecting the NF membrane from fouling.

show abstract

Section: Resultsmentioning

confidence: 99%

Pilot Study on the Combination of Different Pre-Treatments with Nanofiltration for Efficiently Restraining Membrane Fouling While Providing High-Quality Drinking Water

Chen

Pang

et al. 2021

Membranes

View full text Add to dashboard Cite

show abstract

“…Indeed, studies have shown that LMW neutral substances have higher permeability through NF and RO membranes due to the lack of electrostatic repulsion [ 16 , 30 ]. These results suggest that other treatment options such as biological activated carbon filters (BACF) should be employed for the removal of AOC [ 31 ]. The NF reject showed a roughly 90% reduction in luminescence compared to the NF feed.…”

Section: Resultsmentioning

confidence: 99%

Removal of Bacteria and Organic Carbon by an Integrated Ultrafiltration—Nanofiltration Desalination Pilot Plant

et al. 2020

View full text Add to dashboard Cite

Fouling caused by organic matter and bacteria remains a significant challenge for the membrane-based desalination industry. Fouling decreases the permeate quality and membrane performance and also increases energy demands. Here, we quantified the amount of organic matter and bacteria at several stages along the water-treatment train of an integrated ultrafiltration–nanofiltration seawater treatment pilot plant. We quantified the organic matter, in terms of Total Organic Carbon (TOC) and Assimilable Organic Carbon (AOC), and evaluated its composition using Liquid Chromatography for Organic Carbon Detection (LC-OCD). The bacterial cells were counted using Bactiquant. We found that ultrafiltration (UF) was effective at removing bacterial cells (99.7%) but not TOC. By contrast, nanofiltration (NF) successfully removed both TOC (95%) and bacterial cells. However, the NF permeate showed higher amounts of AOC than seawater. LC-OCD analysis suggested that the AOC was mostly composed of low molecular weight neutral substances. Furthermore, we found that the cleaning of the UF membrane using chemically enhanced backwash reduced the amount of AOC released into the UF permeate. By implementing the cleaning-in-place of the NF membrane, the pressure drop was restored to the normal level. Our results show that the UF and NF membrane cleaning regimes investigated in this study improved membrane performance. However, AOC remained the hardest-to-treat fraction of organic carbon. AOC should, therefore, be monitored closely and regularly to mitigate biofouling in downstream processes.

show abstract

“…Research into biologically activated carbon (BAC) water purification for the improved removal of DOM and other organic contaminants has shown promising results for delivering cleaner water [92,93]. Biologically activated carbon filters are produced when specific bacteria are introduced and become entrapped within the AC porous matrix [94].…”

Section: Biologically Activated Carbon For Water Purificationmentioning

confidence: 99%

“…A pilot study involving BAC filters in a water treatment plant has identified their effectiveness for the removal of THMs and HAAs, with greater that 45% and 80% removal efficiency for each respectively [98,99]. An improved removal of assimilable organic carbon has also been reported using BAC filters, which has implications for the growth of microorganisms in water [93]. The effectiveness of these materials depends on many environmental factors including temperature, pH and total DOM, which may limit their applicability in some situations.…”

Section: Biologically Activated Carbon For Water Purificationmentioning

confidence: 99%

Activated Carbon, Carbon Nanotubes and Graphene: Materials and Composites for Advanced Water Purification

Sweetman

May²,

Mebberson³

et al. 2017

172

View full text Add to dashboard Cite

Abstract:To ensure the availability of clean water for humans into the future, efficient and cost-effective water purification technology will be required. The rapidly decreasing quality of water and the growing global demand for this scarce resource has driven the pursuit of high-performance purification materials, particularly for application as point-of-use devices. This review will introduce the main types of natural and artificial contaminants that are present in water and the challenges associated with their effective removal. The efficiency and performance of recently developed materials for water purification, with a focus on activated carbon, carbon nanotubes and graphene will be discussed. The recent advances in water purification using these materials is reviewed and their applicability as point-of-use water purification systems discussed.

show abstract

Analysis and removal of assimilable organic carbon (AOC) from treated drinking water using a biological activated carbon filter system

Cited by 11 publications

References 24 publications

Pilot Study on the Combination of Different Pre-Treatments with Nanofiltration for Efficiently Restraining Membrane Fouling While Providing High-Quality Drinking Water

Pilot Study on the Combination of Different Pre-Treatments with Nanofiltration for Efficiently Restraining Membrane Fouling While Providing High-Quality Drinking Water

Removal of Bacteria and Organic Carbon by an Integrated Ultrafiltration—Nanofiltration Desalination Pilot Plant

Activated Carbon, Carbon Nanotubes and Graphene: Materials and Composites for Advanced Water Purification

Contact Info

Product

Resources

About