Changes in character of organics in the receiving environment of effluent from a sulphite pulp mill

Leeuwen, John van; Lewis, Rosmala; Goonan, Peter; Struve, Naomi; Everson, Andrew; Nothrop, Steven; Smernik, Ronald J.; Chow, Christopher W.K.; Fabris, Rolando; Rupasinghe, Madhawa

doi:10.1007/s11356-011-0714-y

Cited by 6 publications

(1 citation statement)

References 33 publications

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“…The traditional physical processes cannot be used to eliminate the colour contaminants efficiently. Since, the traditional physical processes are non-destructive method, the contaminants are only transferred to compact phase which causes subordinate contaminants [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Development of Blumlein Line Generator and Reactor for Wastewater Treatment

et al. 2013

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Section: Introductionmentioning

confidence: 99%

Development of Blumlein Line Generator and Reactor for Wastewater Treatment

et al. 2013

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Changes in the nature of dissolved organics during pulp and paper mill wastewater treatment: a multivariate statistical study combining data from three analytical techniques

Plant

Smernik

Leeuwen

et al. 2013

Environ Sci Pollut Res

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The paper-making process can produce large amounts of wastewater (WW) with high particulate and dissolved organic loads. Generally, in developed countries, stringent international regulations for environmental protection require pulp and paper mill WW to be treated to reduce the organic load prior to discharge into the receiving environment. This can be achieved by primary and secondary treatments involving both chemical and biological processes. These processes result in complex changes in the nature of the organic material, as some components are mineralised and others are transformed. In this study, changes in the nature of organics through different stages of secondary treatment of pulp and paper mill WW were followed using three advanced characterisation techniques: solid-state (13)C nuclear magnetic resonance (NMR) spectroscopy, pyrolysis-gas chromatography mass spectrometry (py-GCMS) and high-performance size-exclusion chromatography (HPSEC). Each technique provided a different perspective on the changes that occurred. To compare the different chemical perspectives in terms of the degree of similarity/difference between samples, we employed non-metric multidimensional scaling. Results indicate that NMR and HPSEC provided strongly correlated perspectives, with 86 % of the discrimination between the organic samples common to both techniques. Conversely, py-GCMS was found to provide a unique, and thus complementary, perspective.

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Catalytic hydrothermal treatment of pulping effluent using a mixture of Cu and Mn metals supported on activated carbon as catalyst

Yadav

Garg

2015

Environ Sci Pollut Res

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The present study was performed to investigate the performance of activated carbon-supported copper and manganese base catalyst for catalytic wet oxidation (CWO) of pulping effluent. CWO reaction was performed in a high pressure reactor (capacity = 0.7 l) at temperatures ranging from 120 to 190 °C and oxygen partial pressures of 0.5 to 0.9 MPa with the catalyst concentration of 3 g/l for 3 h duration. With Cu/Mn/AC catalyst at 190 °C temperature and 0.9 MPa oxygen partial pressures, the maximum chemical oxygen demand (COD), total organic carbon (TOC), lignin, and color removals of 73, 71, 86, and 85 %, respectively, were achieved compared to only 52, 51, 53, and 54 % removals during the non-catalytic process. Biodegradability (in terms of 5-day biochemical oxygen demand (BOD) to COD ratio) of the pulping effluent was improved to 0.38 from an initial value of 0.16 after the catalytic reaction. The adsorbed carbonaceous fraction on the used catalyst was also determined which contributed meager TOC reduction of 3-4 %. The leaching test showed dissolution of the metals (i.e., Cu and Mn) from the catalysts in the wastewater during CWO reaction at 190 °C temperature and 0.9 MPa oxygen partial pressures. In the future, the investigations should focus on the catalyst reusability.

show abstract

Changes in character of organics in the receiving environment of effluent from a sulphite pulp mill

Cited by 6 publications

References 33 publications

Development of Blumlein Line Generator and Reactor for Wastewater Treatment

Development of Blumlein Line Generator and Reactor for Wastewater Treatment

Changes in the nature of dissolved organics during pulp and paper mill wastewater treatment: a multivariate statistical study combining data from three analytical techniques

Catalytic hydrothermal treatment of pulping effluent using a mixture of Cu and Mn metals supported on activated carbon as catalyst

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