Download or read book Colour Removal from Magnesium Bisulphite Pulp and Paper Mill Effluent Using Lignite Adsorption and Salt Coagulation written by Galuh Yuliani and published by . This book was released on 2012 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The removal of colour, organics and phosphorus from pulp and paper mill effluent and the development of colour of the wastewater were investigated. These contaminants are considered to be the most important due to their resistance over common treatment applied by the mill.Two approaches, adsorption and coagulation, were chosen for investigation of the removal of colour, organics and phosphorus from aqueous discharges of a bisulphite pulp and paper mill. Additionally, the colour generation induced by UV irradiation of the treated effluents was investigated. This study was carried out to explore the possibility of UV-induced colour development of the effluent over the long term and to characterize the colour producing species from the wastewater.Cheap and highly abundant brown coal (or lignite) was utilized as adsorbent for colour, phosphorus, and organics from the industrial effluent. Knowledge on the mechanism of brown coal adsorption, selectivity, the effect of pre-treatment and physical properties of brown coal is crucial for the future application of brown coal in the water industry. The mechanism of brown coal adsorption was investigated using various brown coal samples differing in physical and chemical composition and two model dye solutions, cationic (safranin) and anionic (alizarin red) dyes. The capacities of some brown coals (Loy Yang high Na and Yallourn) were higher than commercial coal-based activated carbon. However, the adsorption capacities of all brown coal samples for an anionic dye were very low, less than 3% of that for activated carbon. This result reveals the potential of brown coal to remove positively charged contaminants from aqueous solutions and suggests cation-exchange as the major mechanism involved. Effects of brown coal pre-treatment, drying and washing, were investigated. The equilibrium adsorption data were analysed using the two most popular adsorption isotherms, Langmuir and Freundlich. The Langmuir isotherm fitted most adsorption data of brown coal better than the Freundlich isotherm, supporting the concept of monolayer adsorption and the role of chemical adsorption in the mechanism. When applied to actual wastewater from a magnesium bisulphite pulp and paper mill, brown coal exhibited multi-component adsorption of colour, organics and phosphorus from the solution. Brown coal showed an ability to remove phosphorus from the wastewater, which could not be achieved with activated carbon; yet brown coal had significantly lower adsorption capacities for colour and organics than did activated carbon. This can be explained by the nature of organics and colour that carried negative charge in the wastewater as indicated by the zeta potential analysis. Another powerful technique for organic removal, coagulation, was then chosen to significantly reduce colour and organics content of the effluent.Coagulation using trivalent salts was selected to efficiently remove colour, organics and total phosphorus in the treated and untreated wastewater solution. Selectivity of salt-induced coagulation was achieved and showed the following trend of removal efficiency: colour ~ total phosphorus > TOC. The removal of colour and total phosphorus from concentrated pulp mill effluents were above 90%. The coagulation method was proven to be superior for the remediation of both treated and untreated effluent from pulp and paper industry. However, a small amount of colour and organics still persisted in the wastewater which may lead to colour development after treatment at the collecting discharge point.The Photometric Dispersion Analyzer (PDA) and Focused Beam Reflectance Measurement (FBRM) techniques were utilised to study the coagulation kinetics of the wastewater upon addition of salt. The involvement of fast aggregation and adsorption in the coagulation mechanism were revealed. The high critical coagulation concentration (CCC) and the significant role of trivalent salts in the coagulation process indicated the involvement of complexation reactions prior to coagulation. In coagulation, pH was also found to be a dominant factor affecting efficiency.The UV-induced colour generation of the effluent from pulp and paper industry was studied using UV-irradiation at 302 nm and 254 nm. Lignin derived compounds were suspected to be responsible for colour growth of pulp and paper wastewater. Three model compounds, lignosulfonic acid, humic acid and vanillin, were selected and studied as comparison. The yellowing rate of the wastewater solution was found to be similar to that of the model lignosulfonic acid solution supporting the occurrence of lignin compounds in the wastewater. The yellowing rate of humic acid was lower than the wastewater solution, but the yellowing rate for vanillin was significantly higher than that of the wastewater solution. The irradiation products were analysed using High Performance Liquid Chromatography (HPLC), UV spectroscopy, Electrospray Mass Spectrometry (ES-MS), Proton Nuclear Magnetic Resonance (1H-NMR) and Fourier Transform Infrared Spectroscopy (FTIR). The mechanism of wastewater yellowing upon irradiation was suspected to mimic the mechanism of photo-yellowing of paper. The result also suggested that UV-induced chemical reactions may be important in the aqueous discharge of pulp and paper mill effluent that could potentially enhance its colour.

Download or read book Review of Colour Removal Technology in the Pulp and Paper Industry written by R. J. Rush and published by Water Pollution Control Directorate : Supply and Services Canada. This book was released on 1976 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pulp and paper industry produces large volumes of effluent containing, among other things, dark brown lignin and lignin degradation products. The exact nature of the chromophoric (colour causing) groups in the wastes and the effects of these colour bodies on the aquatic environment are not known. However, developmental work on several processes for colour reduction has reached full scale application and colour removal is now required in many local areas for various reasons. Colour reduction can be achieved by either technical changes within the mill or by effluent treatment systems. In-plant modification can range from simple, inexpensive measures such as pulp washing and better "housekeeping" practices, to complex technological changes such as implementation of oxygen bleaching. While in-plant changes should be considered and implemented as a first preference, external treatment may often still be required. There are a large number of external treatment methods which are known to be technically feasible for colour removal from pulp and paper mill effluents.

Download or read book Colour and Chloride Removal from Pulp Mill Effluent Using Ion exchange Resins SFM Network Project Reactor Design for Enzyme Catalyzed Colour Removal from Pulp Mill Effluent written by Ian Buchanan and published by . This book was released on 2000 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Colour and Chloride Removal from Pulp Mill Effluent Using Ion exchange SFM Network Project Colour Removal from Kraft Mill Waters by Ion Exchange written by Ian Buchanan and published by . This book was released on 2001 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pulp and Paper Wastewater Color Removal written by Parsa Pezeshk and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Pulp and paper industries generate highly-colored wastewaters, the color of which is not removed by conventional biological treatment. As a result, the persistent color of the wastewater can potentially disrupt the aesthetic appearance of the recieving stream as well as releasing potentially toxic compounds to the environment. Coagulation and flocculation is a chemical treatment practiced to remove color from pulp and paper mill wastewaters. The main focus of this work was to study the color removal efficiency of coagulation/flocculation treatment on a specialty pulp and paper mill wastewater located in the State of Tennessee. In this regard, the effect of coagulant, coagulant aid, and flocculent dosages as well as the wastewater pH and temperature on color removal process were examined. Furtheremore, bentonite clay and powdered activated carbon (PAC) effectiveness for color removal were tested.

Download or read book Colour Removal from Pulp Mill Effluent Using Fly ASH written by University of Saskatchewan and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toxicity of Effluents from Sulphite Pulping Operations Practicing Recovery and Biological Treatment written by Beak Consultants and published by Cepa Office Environment Canada Environmental Protection. This book was released on 1979 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was conducted to determine whether conventional secondary biological treatment detoxifies sulphite pulp mill effluents. Seven sulphite pulp mills, varying in pulping base, wood species, type of treatment and recovery system and geographical location were studied. All mills were located in the United States and practiced some form of chemical recovery and biological treatment (aerated lagoons or activated sludge). Samples of mill effluents before and after biological treatment were collected four times over six months. Standard 96-hour static bioassays using rainbow trout (Salmo gairdneri) determined the LC50 value of each sample. Acute lethality was defined by a compliance standard of LC50=100%. Other routine analyses such as pH, biochemical and chemical oxygen demand, ammonia and total suspended solids were also conducted.

Download or read book Removal of COD and Color on Pulp and Paper Mill Effluent by Using Fenton s Reagent written by Andy Andrew Bedurus and published by . This book was released on 2006 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Color Removal from Pulp Mill Effluent Using Coal Ash Produced from Georgia Power Coal Combustion Plants written by Christopher B. Willett and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Author's abstract: Two environmental concerns currently face Georgia: coal fly ash (CFA) waste from coal power plants, and the effluent generated by pulp mills. Pulp mill effluent discolors surface waters into which it is discharged, and has been proven to negatively impact the dissolved oxygen and carbon necessary for aquatic life. The proposed solution is a cost-effective adsorption treatment using an inexpensive but abundantly available waste material: CFA. CFA possesses beneficial properties that allow it to effectively remove contaminants, and is available at significantly reduced cost. The primary research objective was to define treatment parameters that would result in the maximum removal of effluent color at the lowest CFA dosage and process cost. Experimentation consisted of batch adsorption studies and several test parameters were varied to determine their effect on removal. Kinetic and isotherm studies were also conducted using the optimal conditions, and the data was fitted to existing adsorption models. In addition, a column study was completed to observe CFA in a continuous flow setting. The research produced a cost-effective adsorption process resulting in 80% color removal, and required no effluent pH adjustment. Color removal by CFA was observed to occur primarily in the first hour, with the adsorption achieving equilibrium at 24 hours. Additionally, the Ho et al. kinetic model and the Langmuir and Freundlich isotherm models best described the observed adsorption phenomena. Overall, this research found CFA to be a promising low-cost adsorbent for the removal of color from pulp mill effluent.

Download or read book Colour and Chloride Removal from Pulp Mill Effluent Using Ion exchange written by Giyeon Yun and published by . This book was released on 2001 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Colour Removal from Biologically Treated Pulp and Paper Mill Effluents Final Report to March 31 1974 written by Canada. Environment Canada. Forestry Service and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effluents from Pulp Mills Using Bleaching written by Canada. Environment Canada and published by . This book was released on 1991 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: "There were 47 pulp mills employing chlorine bleaching in operation in Canada at the time of writing this risk assessment report. The molecular chlorine or chlorine-containing compounds currently used as bleaching agents by the pulp and paper sector react with materials released from wood during the pulping process, resulting in the formation of chlorinated organic compounds which are in part discharged into the aquatic environment via effluents"--Summary, p. viii.

Download or read book Colour Removal Frompulp Mill Effluent Using Fly ASH written by and published by . This book was released on 1977 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Novel Methods for the Removal of Colour from Pulp and Paper Mill Wastewater written by Kathryn G. Wingate and published by . This book was released on 2002 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Colour Removal Frompulp Mill Effluent Using Fly ASH written by and published by . This book was released on 1977 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physicochemical Treatments of Pulp and Paper Mill Wastewater by Chemical Preciptation Coagulation Adsorption Flotation and Filtration written by J. Carlos R. De Aguilar and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Color Removal from Pulp and Paper Mill Effluents Using Advanced Oxidation Processes written by John K. Murphy and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: