Reactivity of Effluent Organic Matter (EfOM) with Hydroxyl Radical as a Function of Molecular Weight

2010 ◽  
Vol 44 (15) ◽  
pp. 5714-5720 ◽  
Author(s):  
Mei Mei Dong ◽  
Stephen P. Mezyk ◽  
Fernando L. Rosario-Ortiz
Keyword(s):  
Molecular Weight ◽  
Organic Matter ◽  
Hydroxyl Radical ◽  
Effluent Organic Matter

Photochemical Formation of Hydroxyl Radical from Effluent Organic Matter: Role of Composition

2013 ◽  
Vol 47 (21) ◽  
pp. 12073-12080 ◽  
Author(s):  
Eunkyung Lee ◽  
Caitlin M. Glover ◽  
Fernando L. Rosario-Ortiz
Keyword(s):  
Organic Matter ◽  
Hydroxyl Radical ◽  
Effluent Organic Matter ◽  
Photochemical Formation

scholarly journals Using Molecular Weight-Based Fluorescent Detector to Characterize Dissolved EffluentOrganic Matter in Oxidation Ditch with Algae

2021 ◽  
Author(s):  
Euis Nurul Hidayah ◽  
Okik Hendriyanto Cahyonugroho ◽  
Elita Nurfitriyani Sulistyo ◽  
Nieke Karnangingroem
Keyword(s):  
Molecular Weight ◽  
Organic Matter ◽  
Humic Acid ◽  
Fulvic Acid ◽  
Average Molecular Weight ◽  
Soluble Microbial Products ◽  
Oxidation Ditch ◽  
Effluent Organic Matter ◽  
Wastewater Quality ◽  
Microbial Products

Abstract Implementation microalgae has been considered for enhancing effluent wastewater quality. However, algae can cause environmental issues due to algae released extracellular organic matter, algal organic matter, instead of bacteria-derived organic matter in the biological process. The objectives of this study are to investigate the characteristics of dissolved effluent organic matter as algal-derived organic and bacteria-derived organic during the oxidation ditch process. Experiments were conducted in the oxidation ditch without algae, with Spirulina platensis and Chlorella vulgaris. The results showed dissolved effluent organic matter increased into higher dissolved organic carbon, more aromatic and hydrophobic than that before treatment. Fluorescence spectroscopy identified two component, namely aromatic protein-like at excitation/emission 230/345 nm and soluble microbial products-like at 320/345 nm after treatment, instead of fulvic acid-like at 230/420 nm and humic acid-like at 320/420 nm in raw wastewater. Fractionation of dissolved organic fluorescence based on average molecular weight cut-offs (MWCOs) has obtained that fractions aromatic protein-like, fulvic acid-like, humic acid-like, and soluble microbial products-like has respectively a high MWCOs 50,000 Da, a high to low MWCOs <1650 Da, medium MWCOs 1650 Da to low MWCOs. Biological oxidation ditch under symbiosis algal-bacteria generated humic acid-like and fulvic acid-like with a higher MWCOs than oxidation without algal. The quality and quantity of dissolved effluent organic matter in oxidation ditch algal reactor has been significant affected by algal-bacteria symbiotic.

Effect of Ozone Oxidation on the Molecular and Kinetic Properties of Effluent Organic Matter

2008 ◽  
Vol 11 (3) ◽  
Author(s):  
Fernando L. Rosario-Ortiz ◽  
Stephen P. Mezyk ◽  
Eric C. Wert ◽  
Devin F. R. Doud ◽  
Manu K. Singh ◽  
...  
Keyword(s):  
Organic Matter ◽  
Hydroxyl Radical ◽  
Rate Constant ◽  
Reaction Rate ◽  
Reaction Rate Constant ◽  
Order Reaction ◽  
Kinetic Properties ◽  
Second Order Reaction ◽  
Effluent Organic Matter ◽  
Ozone Oxidation

AbstractThe effect of ozone oxidation on the second order reaction rate constant between effluent organic matter (EfOM) and hydroxyl radical (

Characteristics of fouling due to clay-organic substances in potable water treatment by ultrafiltration

1996 ◽  
Vol 34 (9) ◽  
pp. 157-164 ◽  
Author(s):  
Kim C.-H. ◽  
M. Hosomi ◽  
A. Murakami ◽  
M. Okada
Keyword(s):  
Molecular Weight ◽  
Organic Matter ◽  
Humic Acid ◽  
Fulvic Acid ◽  
Size Distribution ◽  
Ultrafiltration Membrane ◽  
Organic Substances ◽  
Decomposition Products ◽  
Microbial Decomposition ◽  
Fouling Materials

Effects of clay on fouling due to organic substances and clay were evaluated by model fouling materials and kaolin. Model fouling materials selected were protein, polysaccharide, fulvic acid, humic acid and algogenic matter (EOM:ectracellular organic matter, microbial decomposition products) and kaolin was selected as the clay material. Polysulfone membrane (MWCO(Molecular Weight Cut-Off) 10,000, 50,000 and 200,000) was used as an ultrafiltration membrane. In particular, the flux measurement of solutions containing algogenic matter used an ultrafiltration membrane of MWCO 50,000. The flux of protein and polysaccharide with coexistence of kaolin increased in the case of the ratio of MW/MWCO being greater than one, but did not increase in the case of the MW/MWCO ratio being below one. In contrast, the flux of fulvic acid and humic acid with coextence of kaolin decreased regardless of the ratio of MW/MWCO. The addition of dispersion agent and coagulant in the organic substances and kaolin mixture solution changed the size distribution of kaolin, and resulted in a change of the flux. EOM and microbial decomposition products decreased with the increase of the fraction of organic matter having molecular weight more than MWCO of membrane. The flux of the algogenic organic matter with coexistence of kaolin decreased with the increase of the amount of kaolin. It was suggested that the decline of the flux with coexistence of kaolin was due to the change of the resistance of the kaolin cake layer corresponding to the change in kaolin size distribution with charge.

Sign in / Sign up

Export Citation Format

Share Document