Corrosion investigations on secondary treated paper mill effluents

2015 ◽  
Vol 62 (5) ◽  
pp. 327-333 ◽  
Author(s):  
Chhotu Ram ◽  
Chhaya Sharma ◽  
A K Singh
Keyword(s):  
Design Methodology ◽  
Material Selection ◽  
Paper Mill ◽  
Immersion Test ◽  
Effluent Treatment ◽  
Localized Corrosion ◽  
Content Type ◽  
Paper Mill Effluent ◽  
Paper Mill Effluents ◽  
Secondary Stage

Purpose – This paper aims to report on corrosivity of secondary-stage paper mill effluent and corrosion performance of stainless steels. Design/methodology/approach – For this purpose, immersion test and electrochemical polarization tests were conducted in mill and synthetic effluent to evaluate the uniform and localized corrosion. Findings – Corrosivity of mill effluent has been compared with synthetic and primary-stage effluent of the same mill. It is observed that anions present in them, viz. SO4−, PO34−, NO2− and NO3−, impart inhibition, whereas Cl− and chlorophenols enhance the corrosivity of the effluent. The overall effect of various components was reduction in corrosivity of secondary mill effluent. Originality/value – These observations can be useful for material selection and helpful in corrosion mitigation in paper mill effluent treatment plants.

Printability of bio-composite sheets made from paper mill and cardboard mill waste sludge

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hüseyin Yüce ◽  
Garip Genç ◽  
Sinan Sönmez ◽  
Öznur Özden ◽  
Ahmet Akgül ◽  
...  
Keyword(s):  
Design Methodology ◽  
Screen Printing ◽  
Polyester Resin ◽  
Composite Plates ◽  
Paper Mill ◽  
Content Type ◽  
Waste Sludge ◽  
Water Solvent ◽  
Paper Mill Waste ◽  
Mill Waste

Purpose The purpose of this study is to reveal the usability of waste paper sludge on the production of composite materials and the printability of their surfaces were investigated. Design/methodology/approach First, composite plates were produced by using dried and milled waste sludge together with polyester resin and epoxy. Screen printing using water, solvent and UV-based inks were carried out. Findings It was determined that UV and solvent-based inks in both resin groups were permanently attached to the surface of composite plates produced using paper mill waste sludge, while it was found that the adhesion was not achieved sufficiently in cardboard factory waste sludge. Originality/value The unique aspect of this study is obtained the composite plates from paper mill and cardboard mill waste sludge and improved the printability of them.

scholarly journals Removal of Zn2+ and Pb2+ using new isolates of Bacillus spp. PPS03 and Bacillus subtilis PPS04 from Paper mill effluents using indigenously designed Bench-top Bioreactor

2014 ◽  
Vol 6 (1) ◽  
pp. 47-56 ◽  
Author(s):  
Pushpendra Pal Singh ◽  
A. K. Chopra
Keyword(s):  
Bacillus Subtilis ◽  
Metal Ion ◽  
Paper Mill ◽  
Ion Concentration ◽  
Bacterial Strains ◽  
Pseudo First Order Reaction ◽  
Paper Mill Effluent ◽  
Paper Mill Effluents ◽  
Freundlich Isotherms ◽  
Bacillus Spp

Biosorption processes have the potential to decrease environmental hazards through their factors such as initial metal ion concentration, temperature, pH and biomass concentration in the solution. In the present study biosorption process was performed using the strains of Bacillus spp. PPS 03 (KF710041) and Bacillus subtilis PPS 04 (KF710042) isolated from sediment core of Paper mill effluent (PME) for the removal of Zn2+and Pb2+ in an indigenously designed Bench-top Bioreactor. The temperature, initial pH, biomass and incubation period of PME for Zn2+ and Pb2+ reduction was standardized. The strains exhibited significant reduction in Zn2+ and Pb2+ of PME to the extent of 73.29% and 85.64% with PPS 03 and 78.15% and 87.57% respectively with PPS 04 after 120 hrs of aerobic treatment. The reduction in the metals occurred from first day of the treatment, but the maximum reduction in these metals was observed after 120 hrs. at pH (7.0±0.2), temperature (35±1.0°C) and biomass (5% v/ v) of the bacterial strains. The removal of metals with strain PPS 04 was more in comparison to the strain PPS 03. The Freundlich isotherms on the data showed that it was linearly fitted for Zn2+and Pb2+. The values of correlation coefficient (R2) of Freundlich isotherms were greater than 0.812 for Pb2+ and Zn2+. The kinetic study for the rate of removal of Pb2+ and Zn2+ by both species was found to best fit a Pseudo first order reaction. The rate constant was found to be inversely proportional to the concentration of parameters. Thus, the microbial strains were found efficient for the biosorption/removal of Pb2+ and Zn2+.

Biosynthesis of Zinc Oxide Nanoparticles Using Leaf Extract of Prosopis juliflora as Potential Photocatalyst for the Treatment of Paper Mill Effluent

2021 ◽  
Vol 11 (23) ◽  
pp. 11394
Author(s):  
Ahmed M. Abbas ◽  
Sabah A. Hammad ◽  
Heba Sallam ◽  
Lamiaa Mahfouz ◽  
Mohamed K. Ahmed ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Organic Pollutants ◽  
Hexagonal Wurtzite Structure ◽  
Paper Mill ◽  
Prosopis Juliflora ◽  
Zno Nps ◽  
Leaf Extracts ◽  
Paper Mill Effluent ◽  
Paper Mill Effluents ◽  
Ft Ir

This paper reports on the manufacture of ZnO nanoparticles (ZnO NPs) from Prosopis juliflora leaf extracts. Various methods of characterization were used, including X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and transmission electron microscope TEM. ZnO NPs has a hexagonal wurtzite structure with a preferred orientation of 101 planes, according to XRD. The functional groups found in ZnO NPs isolated from leaves are responsible for the FT-IR peaks that correspond to them. The morphology of the produced nanoparticles is a sphere-like form, as shown in the SEM pictures. TEM examination revealed ZnO NPs with a size of 50–55 nm. These ZnO NPs were used to remediate pollutants in paper mill effluents, and they were able to remove 86% of the organic pollutants from the sample at 0.05 mg/L dose and reduce 89% of the organic pollutants during a 5-h reflex time. Meanwhile, for the photocatalysis of paper mill effluents, it has been noted that COD was removed by 74.30%, 63.23%, and 57.96% for the first, second, and third cycles, respectively.

Corrosion of steel due to iron oxidizing bacteria

2019 ◽  
Vol 66 (1) ◽  
pp. 19-26 ◽  
Author(s):  
Reena Sachan ◽  
Ajay Kumar Singh
Keyword(s):  
Extracellular Polymeric Substances ◽  
Immersion Test ◽  
Corrosion Products ◽  
Localized Corrosion ◽  
Content Type ◽  
Electrochemical Tests ◽  
Iron Oxidizing Bacteria ◽  
Uv Visible ◽  
Corrosion Of Steel ◽  
Sulphite Formation

Purpose The purpose of this study is to investigate microbial influenced corrosion of steel because of iron oxidizing bacteria (IOB). Design/methodology/approach Carbon steel was selected for this study. Winogradsky media was used for isolation of IOB and as test solution for corrosion measurements. Electrochemical tests and immersion test were conducted to estimate the corrosion rate and extent of pitting. The corroded surface was analysed by SEM and corrosion products formed over the metal surface were identified by XRD and Fourier transformed infrared. Biofilm formed over the corroded metal was analysed by UV-visible spectroscopy for its extracellular polymeric substances (EPS) constituents. Findings Presence of IOB in Winogradsky medium enhances corrosion. Uniform and localized corrosion increases with increased bacterial concentration and EPS constituents of the biofilm. Iron sulphite formation as one of the corrosion products has been suggested to be responsible for increased corrosion attack in the inoculated media in comparison to control media where corrosion product observed is iron hydrogen phosphate which is protective in nature. Originality/value This work correlates increased corrosion of steel in the presence of bacteria with the nature of corrosion products formed over it in case of IOB. Formation of corrosion products is governed by various electrochemical reactions; hence, inhibition of such reactions may lead to reduce or stop the formation of such products which enhances corrosion and thereby may reduce the extent of microbial induced corrosion.

Effect of carbides on sensitivity of pitting corrosion in Inconel 718 alloy

2020 ◽  
Vol 67 (2) ◽  
pp. 158-165
Author(s):  
Xianping Wei ◽  
Wen Jie Zheng
Keyword(s):  
Pitting Corrosion ◽  
Inconel 718 ◽  
Design Methodology ◽  
Electrochemical Impedance ◽  
Immersion Test ◽  
Nacl Solution ◽  
Inconel 718 Alloy ◽  
Content Type ◽  
Corrosion Susceptibility ◽  
Dynamic Electrochemical Impedance Spectroscopy

Purpose This paper aims to expand the application area of Inconel 718 alloy in marine environment, the sensitivity of pitting corrosion should be analyzed and discussed, especially the effect of block carbides. Design/methodology/approach Effect of carbides on the sensitivity of pitting corrosion for Inconel 718 alloy was carried out at 30°C in 3.5% NaCl solution using dynamic electrochemical impedance spectroscopy and anodic polarization techniques. In addition, the initiation of pitting corrosion was investigated by immersion test in 0.05 M HCl + 6% FeCl3 solution. Findings As a result, the precipitation of carbides, as the initiation of pitting corrosion, increased pitting corrosion susceptibility, especially the block carbides could lead to deep-spalling. Within that process, temperature and potential acted as the main controlling factors, and the effect of the latter was more distinct. Originality/value The initiation of pitting corrosion was revealed by the immersion test. The mechanism of pitting corrosion was analyzed and discussed.

Pulp and paper mill effluent treatment by hybrid anaerobic upflow fixed-bed bioreactor combined with slow sand filter

2015 ◽  
Vol 57 (23) ◽  
pp. 10528-10536 ◽  
Author(s):  
Tripti Mishra ◽  
Sudipta Ramola ◽  
Anil Kumar Shankhwar ◽  
Amit Kumar Rabha ◽  
R.K. Srivastava
Keyword(s):  
Fixed Bed ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Effluent Treatment ◽  
Pulp And Paper Mill ◽  
Sand Filter ◽  
Paper Mill Effluent ◽  
Fixed Bed Bioreactor ◽  
Slow Sand Filter

The effects of nutrient limitation (nitrogen and phosphorus) on BOD removal from post-coagulated Pinus radiata sulfite pulp and paper mill wastewater in a baffled aerated stabilisation basin–laboratory pilot scale study

2011 ◽  
Vol 63 (3) ◽  
pp. 491-501 ◽  
Author(s):  
R. Dewi ◽  
J. A. Van Leeuwen ◽  
A. Everson ◽  
S. C. Nothrop ◽  
C. W. K. Chow
Keyword(s):  
Pinus Radiata ◽  
Paper Mill ◽  
Pilot Scale ◽  
Pulp And Paper ◽  
Pulp And Paper Mill ◽  
Nitrogen And Phosphorus ◽  
Paper Mill Effluent ◽  
Paper Mill Effluents ◽  
Significant Difference ◽  
Sulfite Pulp

The use of coagulation and flocculation for tertiary treatment of pulp and paper mill effluent was investigated, where the evaluation was based on the removal of nitrogen (N), phosphorus (P) and BOD from post-coagulated wastewater. The study was undertaken on laboratory scale aerobic stabilisation basins (ASB). Two post coagulated (alum) wastewaters were studied, where the BOD:N:P ratios were 100:1.3:0.06 and 100:1.3:0.3. These wastewaters were treated in two identical concurrent simulations (A & B). The influent ratio for ‘A’ was selected representing the composition of actual coagulated Pinus radiata sulfite pulp effluent mixed with paper mill effluent. The input composition for ‘B’ represented a typical P concentration found in existing pulp and paper mill effluents. Unmodified sludge collected from a mill-pond was added at 4% v/v to each simulation replicating the treatment conditions at full-scale. Similar high percentage removals of BOD and COD occurred after 28 days (two HRTs) which were 94 and 67% respectively for ‘A’, and 98 and 70% respectively for ‘B’, where both remained at steady state during the third HRT. A statistical analysis of the data revealed that there was no significant difference in the sample variance of the BOD and COD results.

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