Treatability of organic fractions derived from secondary effluent by reverse osmosis membrane

Hu, Jiangyong; Ong, Say Leong; Shan, Junhong; Kang, Joon-Seok; Ng, Wun Jern

doi:10.1016/j.watres.2003.08.002

Cited by 32 publications

(8 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was agreed with the extreme high SUVA of around 5.40 m −1 L/mg C (Leenheer and Croue 2003). These results were obviously different from DOM hydrophobic/ hydrophilic distributions of typical biotreated municipal effluents (Gong et al 2008;Hu et al 2003;Shon et al 2004), in which hydrophilic fraction accounted for 32-52% of DOC and a low sample SUVA value of 1.29-1.78 was noted. Figure 2(b) illustrates the overwhelmingly dominant fraction of color was non-acid hydrophobics (57%), and the contributions to ADMI value from hydrophilic (1%) and transphilic (3%) constituents were extremely low.…”

Section: Oxidative Characteristics Of Domsupporting

confidence: 69%

Effect of Ozone on Removal of Dissolved Organic Matter and its Biodegradability and Adsorbability in Biotreated Textile Effluents

Qian

Sun

Liu

2013

Ozone: Science & Engineering

View full text Add to dashboard Cite

A study was conducted on the efficacy of ozonation in removing dissolved organic matter (DOM) in biotreated textile effluents and effects on its biodegradability and adsorbability. Results showed the efficient removal of color and fluorescence compounds were achieved through ozonation, due to increasing hydrophilicity and lowering molecular weight of DOM. A significant biodegradability improvement was also observed, and DOM adsorbability on activated carbon was highly dependent on ozone dosage. As the key parameter, consumed 3.8 g O 3 / g TOC 0 was the optimal dosage in the hybrid process combining ozonation with biological activated carbon (BAC) for wastewater reclamation.

show abstract

Section: Oxidative Characteristics Of Domsupporting

confidence: 69%

Effect of Ozone on Removal of Dissolved Organic Matter and its Biodegradability and Adsorbability in Biotreated Textile Effluents

Qian

Sun

Liu

2013

Ozone: Science & Engineering

View full text Add to dashboard Cite

show abstract

“…The original water used in this study was secondary effluent collected from a local sewage treatment plant. Six types of organic fractions, namely hydrophobic acids, hydrophobic bases, hydrophobic neutrals, hydrophilic acids, hydrophilic bases, and hydrophilic neutrals, were isolated from treated effluent samples by resin columnadsorption method mentioned in our previous study (Hu et al 2003).…”

Section: Organic Fractions Preparationmentioning

confidence: 99%

“…It was noted in our previous study that RO process could achieve high DOC rejections for acid and neutral fractions (ranging from 80% to 98% removal) but could only remove 50 -78% of base fractions (Hu et al 2003). How to improve the removal of those fractions will become an important issue.…”

Section: Introductionmentioning

confidence: 99%

Improving rejection of organic fractions in reclaimed water based on intermolecular interaction effect

Shan

Ong

2008

Water Science and Technology

View full text Add to dashboard Cite

The interactions of complex organic matters in reclaimed water were studied for the rejection mechanisms for organics removal by nanofiltration (NF) membrane. Rejection study on single organic fractions showed that base fractions are the most difficult ones to be removed, with the removal efficiencies of 40.08-47.73% for hydrophobic-base (Hpo-B) and 75.51-79.14% for hydrophilic-base (Hpi-B), respectively. Experimental results for interaction studies showed that with the presence of hydrophilic-acid (Hpi-A) and hydrophobic-acid (Hpo-A) at a concentration ratio of 1, the average rejections for acid + base fractions were 11-30% and 9-26% higher than those for the two corresponding single fractions, respectively. It was noted that after the ratio reaches a certain range (> 2 for Hpo-A in our case) the beneficial effects become less significant since the saturation of opportunities for interactions. With presence of acid and base fractions, the neutralization reactions and hydrophilic interactions would be the major beneficial interaction among different components. With the presence of hydrophobic-neutral (Hpo-N) at a concentration ratio of 1, the average rejections for neutral + base fractions were improved by 9-35% and when at a ratio of 2, the rejections only increased 2.28-8.87% more. The interaction between neutral organics and base organics would be due to the effect of coupling of different permeable components.

show abstract

“…The structural and compositional information on the organic matters in water have typically been obtained with bulk parameters includingTOC, UV absorbance and SUVA values (Hu et al, 2003). More specific parameters such asmalondialdehyde (MDA) (Maness et al, 1999), carboxylic acids (Pigeot-Remy et al, 2011;Pigeot-Remy et al, 2012), carboxylated proteins (Thabet et al, 2014) and N-nitrosodimethylamine (Wang et al, 2014) have been successfully characterized the organic matters in disinfection process, with an attempt to probe their possible relationship with disinfection kinetic and toxicity of the treated water.…”

Section: Introductionmentioning

confidence: 99%

Probing the intracellular organic matters released from the photocatalytic inactivation of bacteria using fractionation procedure and excitation-emission-matrix fluorescence

Huang

et al. 2017

Water Research

View full text Add to dashboard Cite

Photocatalysis provides a "green" and effective strategy for water disinfection. During the photocatalytic disinfection process, intracellular organic matter (IOM) from bacterial cells may be released into the bulk solution. In this study, the role of released IOM in the photocatalytic bacterial inactivation was investigated by fractionation procedure and fluorescence excitation-emission-matrix (EEM) combined with parallel factor analysis (PARAFAC) approaches. The normal bacterial cells treated by TiO-UVA in the presence and absence with fractionated IOM results implied that the released IOM would be either absorbed on the surface of the photocatalysts or reacted by the photo-generated reactive species, and thereby affecting the kinetics of photocatalytic bacterial inactivation. Fluorescence EEM-PARAFAC results showed that two components (C1 and C3) associated with tryptophan- and tyrosine-like proteins were released. While another two components (C2 and C4) were the oxidation products, and their intensities were found to negatively correlate with those of C1 and C3, respectively. Microtox test results indicated that toxicity occurred during the photocatalytic bacterial inactivation process. The toxicity was found to decrease after the bacteria were completely inactivated, and completely removed if provided a sufficient reaction time. Of particular interest is that a significant high linear correlation was observed between the toxicity and the maximum fluorescence intensity of C4. The results and information obtained in this study will be important for further developing photocatalysis in water/wastewater disinfection.

show abstract

Treatability of organic fractions derived from secondary effluent by reverse osmosis membrane

Cited by 32 publications

References 14 publications

Effect of Ozone on Removal of Dissolved Organic Matter and its Biodegradability and Adsorbability in Biotreated Textile Effluents

Effect of Ozone on Removal of Dissolved Organic Matter and its Biodegradability and Adsorbability in Biotreated Textile Effluents

Improving rejection of organic fractions in reclaimed water based on intermolecular interaction effect

Probing the intracellular organic matters released from the photocatalytic inactivation of bacteria using fractionation procedure and excitation-emission-matrix fluorescence

Contact Info

Product

Resources

About