Characterization of dissolved organic matter in the secondary effluent of pulp and paper mill wastewater before and after coagulation treatment

2016 ◽  
Vol 74 (6) ◽  
pp. 1346-1353 ◽  
Author(s):  
Xiaolei Shi ◽  
Chunhua Xu ◽  
Hongying Hu ◽  
Fang Tang ◽  
Lijuan Sun
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Apparent Molecular Weight ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Secondary Effluent ◽  
Pulp And Paper Mill ◽  
Before And After ◽  
Paper Mill Wastewater ◽  
Hydrophobic Acids

Meeting the regulatory discharge standards for pulp and paper mill wastewater has become ever more difficult because of its recalcitrant and colored dissolved organic matter (DOM). In this study, the variation of DOM from the secondary effluent of pulp and paper mill wastewater before and after coagulation was investigated based on hydrophobicity/hydrophilicity, apparent molecular weight (MW) and fluorescence. DOM fractions of the secondary effluent were all with the apparent MW <20 kDa. Particularly, the hydrophobic acids (HOA) fraction, mainly composed of humic-like materials, was the major component, and it also had the highest color and SUVA254 (UV254 to dissolved organic carbon ratio). Hydrophilic bases (HIB) and hydrophilic neutrals (HIN) fractions were the other important parts besides HOA. Coagulation can remove all DOM fractions to different extent, and it was more effective for organic compounds with MW > 5 kDa. The removal efficiencies of humic-like, fulvic-like and soluble microbial by-product-like constituents in HOA and HIB fractions were much higher than in other fractions. Even so, the coagulation effluent still contained large amounts of contaminants with complicated fluorophores and apparent MW <5 kDa, and HOA and HIN fractions were also the major parts in the coagulation effluent.

Occurrence of Nonylphenol Ethoxylates and Their Metabolites in Canadian Pulp and Paper Mill Effluents and Sludge

1999 ◽  
Vol 34 (4) ◽  
pp. 633-652 ◽  
Author(s):  
Hing-Biu Lee ◽  
Thomas E. Peart
Keyword(s):  
High Performance ◽  
Waste Treatment ◽  
Solid Phase ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Secondary Effluent ◽  
Nonylphenol Ethoxylates ◽  
Pulp And Paper Mill ◽  
Paper Mill Effluents ◽  
Treated Effluent

Abstract A survey of the concentrations of nonylphenol ethoxylates (NPnEO) and their metabolites in the primary and secondary treated effluent and sludge samples collected from pulp and paper mills was conducted. Through the coordination of the Pulp and Paper Research Institute of Canada (PAPRICAN), 19 Canadian and one U.S. mill of various process types and waste treatment methods supplied samples in this study. Previously developed solid-phase extraction, supercritical fluid extraction, high performance liquid chromatography and gas chro-matography/mass spectrometry methods were used for the determination of NPnEO and their metabolites, nonylphenol (NP) and the carboxylates (NPEC), in effluent and sludge samples. The levels of NPnEO ranged from <2 to 129 (median 4.5) µg/L and from <2 to 71.3 (median 5.8) µg/L for the primary and secondary effluents, respectively. The concentrations of NP varied from <0.1 to 1.32 (median 0.35) µg/L in the primary effluent and from <0.1 to 4.32 (median <0.1) µg/L in the secondary effluent. NPECs were found in only one primary and four secondary effluent samples, with an overall concentration range from <1 to 32 µg/L. These results are lower than those reported for paper mill effluents discharged into the lower Fox River, WI, USA. For the pulp and paper mill sludge, the levels of NPnEO and NP, on a dry weight basis, varied from <1 to 90.8 (median 21) µg/g and from <0.05 to 121 (median 1.3) µg/g, respectively. While NPnEO and NP were detected in nearly all sludge, their concentrations were lower than those observed for digested sewage sludge. Again, NPEC were found in only four samples, with an overall range from <1 to 18.5 µg/g. No relationship between the nonylphenolic levels in the effluent samples and the process and waste treatment types of the mill was found.

Treatment of pulp and paper mill wastewater by solar photo-Fenton process

2013 ◽  
Vol 52 (13-15) ◽  
pp. 2457-2464 ◽  
Author(s):  
G. Ginni ◽  
S. Adishkumar ◽  
J. Rajesh Banu ◽  
N. Yogalakshmi
Keyword(s):  
Paper Mill ◽  
Pulp And Paper ◽  
Fenton Process ◽  
Pulp And Paper Mill ◽  
Paper Mill Wastewater
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