Impact of Wastewater Treatment Processes on Organic Carbon, Organic Nitrogen, and DBP Precursors in Effluent Organic Matter

Using three analytical techniques of size exclusion chromatography (SEC), fluorescence excitation-emission matrix (EEM), and dissolved organic nitrogen (DON) measurement, differentiating characteristics of effluent organic matter (EfOM) from natural organic matter (NOM) have been investigated. SEC reveals a wide range of molecular weight (MW) for EfOM and high amount of high MW polysaccharides, and low MW organic acids compared to NOM. Clear protein-like peaks using fluorescence EEM were a major feature of EfOM distinguishing it from NOM. Fluorescence index (FI), an indicator to distinguish autochthonous origin from allochthonous origin, differentiated EfOM from NOM by exhibiting higher values, indicating a microbial origin. In EfOM samples, DON present in higher amounts than NOM.

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Analysis of Genotoxicity and Characterization of Dissolved Organic Matter in the Aniline Industrial Wastewater

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1010-1012.472 ◽

2014 ◽

Vol 1010-1012 ◽

pp. 472-477 ◽

Cited By ~ 1

Author(s):

Zhe Wang ◽

Wen Yu Zhao ◽

Li Wei Xu ◽

Qi Mu

Keyword(s):

Organic Matter ◽

Wastewater Treatment ◽

Organic Carbon ◽

Dissolved Organic Carbon ◽

Industrial Wastewater ◽

Adsorption Method ◽

Resin Adsorption ◽

Hydrophobic Acids ◽

A Company

Effluent of aniline wastewater treatment from a company was isolated and fractionated by resin adsorption method into six different fractions. These fractions are operationally categorized as hydrophobic acids (HOA), hydrophobic bases (HOB), hydrophobic neutrals (HON), hydrophilic acids (HIA), hydrophilic bases (HIB) and hydrophilic neutrals (HIN). The dissolved organic carbon (DOC), ultraviolet-visible (UV) and genotoxicity of each fractions were determined. The results showed that hydrophobic matter is the main fractions of DOC and makes the main contributions to the genotoxicity of effluent of aniline wastewater treatment.

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Mineralization of soil organic nitrogen under waterlogged conditions in relation to other properties of tropical rice soils

Soil Research ◽

10.1071/sr9830133 ◽

1983 ◽

Vol 21 (2) ◽

pp. 133 ◽

Cited By ~ 26

Author(s):

KL Sahrawat

Keyword(s):

Organic Matter ◽

Organic Carbon ◽

Soil Properties ◽

Total Nitrogen ◽

Organic Nitrogen ◽

Wetland Rice ◽

Organic Carbon Content ◽

Rice Soils ◽

Wide Range ◽

Mineralizable Nitrogen

The mineralizable nitrogen pool in wetland rice soils plays a dominant role in the nitrogen nutrition of rice even in fertilized paddies. There is a lack of information on how different soil properties affect ammonification of organic nitrogen in wetland rice soils. Surface samples of 39 diverse Philippine soils representing a wide range of pH, organic matter and texture were studied to determine the relationships between ammonification of organic nitrogen and soil properties. Simple correlation analysis showed that ammonium production was correlated highly significantly with total nitrogen (r = 0.94**), organic carbon (r = 0.91**) and C/N ratio (r = -0.46**), but it was not significantly correlated with cation exchange capacity, clay or pH. Multiple regression analayses showed that organic matter (organic carbon and total nitrogen) accounted for most of the variation in mineralizable nitrogen. These results suggest that organic carbon content is a good index of mineralizable nitrogen in tropical wetland rice soils.

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Examining the Effects of the Runoff Originating From Biosolids Amended Soil Plots on the Biogeochemical Nitrogen Cycle and Eutrophication

10.32920/ryerson.14652471 ◽

2021 ◽

Author(s):

Denis Matiichine

Keyword(s):

Organic Matter ◽

Wastewater Treatment ◽

Organic Nitrogen ◽

Treatment Process ◽

Organic Fertilizer ◽

Agricultural Runoff ◽

Water Systems ◽

Agricultural Fields ◽

Wastewater Treatment Process ◽

Significant Difference

One of the disposal methods for biosolids (nutrient rich organic matter that settles out of the wastewater during wastewater treatment process) is through application on agricultural fields as organic fertilizer. In order to determine the effects of runoff originating from biosolids treated fields on the nitrogen biogeochemical cycle and eutrophication of surface water, a lab-scale mesocosm experiment was carried out, simulating agricultural fields and thermally stratified water systems receiving agricultural runoff. A significant difference was found between the effects of the runoff from unfertilized soil plots and plots fertilized with biosolids. The findings indicate that the majority of incoming nitrogen is either denitrifed, lost to the sediment or is accumulated in the water column as nitrate. Further, it is hypothesised that the majority of incoming organic nitrogen was rapidly mineralized to ammonium in the hypolimnion, which has the potential to increase nitrogen bioavailability to primary producers in the epilimnion.

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Tracking of Dissolved Effluent Organic Matter (dEfOM) in wastewater treatment plant by using fluorescence method

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/245/1/012018 ◽

2019 ◽

Vol 245 ◽

pp. 012018

Author(s):

E N Hidayah ◽

O H Cahyonugroho

Keyword(s):

Organic Matter ◽

Wastewater Treatment ◽

Wastewater Treatment Plant ◽

Treatment Plant ◽

Fluorescence Method ◽

Effluent Organic Matter

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Fouling of low-pressure (MF and UF) membranes by wastewater effluent organic matter (EfOM): characterization of EfOM foulants in relation to membrane properties

Water Science & Technology Water Supply ◽

10.2166/ws.2003.0172 ◽

2003 ◽

Vol 3 (5-6) ◽

pp. 229-235 ◽

Cited By ~ 2

Author(s):

C. Laabs ◽

G. Amy ◽

M. Jekel ◽

H. Buisson

Keyword(s):

Organic Matter ◽

Wastewater Treatment ◽

Treatment Plant ◽

Low Pressure ◽

Wastewater Effluent ◽

Membrane Properties ◽

Feed Water ◽

Effluent Organic Matter ◽

Efficient Operation ◽

Atomic Force

Low-pressure (micro- and ultrafiltration) membranes are increasingly being used in water reclamation processes treating secondary or tertiary effluent from wastewater treatment plants. The main challenge remains the fouling of membrane surface/pores by organic matter which prevents efficient operation. The extent of this fouling strongly depends on feed water quality as well as membrane properties. The aim of this study is to characterize wastewater effluent organic matter (EfOM) and to describe its fouling behavior in relation to various membrane properties (pore size, charge, material, hydrophobicity) through evaluation with stirred cell experiments, elemental analysis, 13C-NMR spectroscopy, and atomic force spectroscopy. Four membranes are tested - one ultrafiltration (UF) membrane and three microfiltration (MF) membranes - with bulk EfOM, derived from the Boulder, Colorado, USA, wastewater treatment plant, as well as with EfOM isolates. The hydrophobic microfiltration membrane is most seriously fouled by bulk Boulder EfOM, while the two hydrophilic membranes (MF, UF) made of cellulose acetate are the least fouled. Differences between the flux decline curves of various membranes are less distinct with isolates than with bulk EfOM. The transphilic isolate (TPIA-Bld) exhibited a higher fouling potential than the hydrophobic isolate (HPOA-Bld). This behaviour is due to the different chemical characteristics of the isolates, namely the higher percentage of hetero-atoms (oxygen and nitrogen) of the transphilic isolate compared to the hydrophobic isolate. Finally, atomic force microscope (AFM) images present clear evidence of fouling. AFM is clearly able to detect the fouling layer, although it has not been possible to distinguish between pore blockage and surface fouling thus far.

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