scholarly journals Performance assessment of activated carbon supported catalyst during catalytic wet oxidation of simulated pulping effluents generated from wood and bagasse based pulp and paper mills

RSC Advances ◽  
2017 ◽  
Vol 7 (16) ◽  
pp. 9754-9763 ◽  
Author(s):  
Bholu Ram Yadav ◽  
Anurag Garg
Keyword(s):  
Activated Carbon ◽  
Performance Assessment ◽  
Supported Catalyst ◽  
Oxygen Demand ◽  
Pulp And Paper ◽  
Small Scale ◽  
Wet Oxidation ◽  
Catalytic Wet Oxidation ◽  
Pulp And Paper Mills ◽  
Paper Mills

The present study reports the performance of catalytic wet oxidation (CWO) for the treatment of simulated pulping effluents (with chemical oxygen demand (COD) = 15 000 and 17 000 mg L−1) from large and small scale pulp and paper mills, respectively.

Water Pollution Abatement in Small Paper Mills in India

1988 ◽  
Vol 20 (1) ◽  
pp. 37-48 ◽  
Author(s):  
L. Panneerselvam
Keyword(s):  
Water Pollution ◽  
Wastewater Treatment ◽  
Raw Materials ◽  
Pollution Abatement ◽  
Pulp And Paper ◽  
Operating Costs ◽  
Small Scale ◽  
Pulp And Paper Mills ◽  
Paper Mills ◽  
Recovery System

In order to reduce the demand for the forest based raw materials by the organised industrial sectors like the large integrated pulp and paper mills, the Government of India started promoting several small-scale pulp and paper mills based on non-wood agricultural residue raw materials. However promotion of these small mills has created another environmental problem i.e. severe water pollution due to non-recovery of chemicals. Because of the typical characteristics like high silica content etc. of the black liquor produced and the subsequent high capital investment needed for a recovery system, it is not economically feasible for the small Indian mills to recover the chemicals. While the quantity of wastewater generated per tonne of paper produced by a small mill is same as from a large integrated pulp and paper mill with a chemical recovery system, their BOD load is four times higher, due to non recovery of chemicals. However the existing wastewater disposal standards are uniform for large and small mills for e.g. 30 mg BOD/l. To meet these standards, the small mills have to install a capital intensive wastewater treatment plant with heavy recurring operating costs. Therefore the feasible alternative is to implement various pollution abatement measures, with the objective of not only reducing the fibre/chemical loss but also to reduce the investment and operating costs of the final wastewater treatment system. To illustrate this approach, a case study on water pollution abatement and control in a 10 TPD mill, will be discussed.

scholarly journals Waste Water Treatment Technology for Small Scale Pulp and Paper Mills in Thailand (Part 2)

2000 ◽  
Vol 54 (3) ◽  
pp. 389-395,017
Author(s):  
Hiromutsu Wada ◽  
Bussarin Khongseri ◽  
Nusara Sinbuathong ◽  
Yoshinari Kobayashi
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Pulp And Paper ◽  
Small Scale ◽  
Treatment Technology ◽  
Pulp And Paper Mills ◽  
Paper Mills ◽  
Water Treatment Technology

scholarly journals Integral indices for quality assessment of pulp and paper mill effluents

2014 ◽  
Vol 33 (1) ◽  
Author(s):  
Konstantin Bogolitsyn ◽  
Maria Gusakova ◽  
Nina Samsonova ◽  
Natalia Selivanova ◽  
Alexsandra Pochtovalova
Keyword(s):  
Oxygen Demand ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Complex Nature ◽  
Pulp And Paper Mill ◽  
Pulp And Paper Mills ◽  
Paper Mills ◽  
Paper Mill Effluents ◽  
Northwest Region ◽  
Qualitative And Quantitative Characteristics

AbstractThe first part of this investigation studied complex nature of chemical oxygen demand (COD ) parameter on local and overall effluents, which were obtained from two pulp and paper mills, located in the Northwest region of Russia. Contribution of individual compounds and fractions of matters having different chemical nature to COD for these effluents was established. The second part of this study shows that, qualitative and quantitative characteristics of priority pollutants and their contribution to COD for different pulp and paper mills are not the same, though these mills use similar technologies and produce similar products.

scholarly journals Bioremediation of Agro-Based Pulp Mill Effluent by Microbial Consortium Comprising Autochthonous Bacteria

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Virendra Kumar ◽  
Purnima Dhall ◽  
Rita Kumar ◽  
Yogendra Prakash Singh ◽  
Anil Kumar
Keyword(s):  
Black Liquor ◽  
Oxygen Demand ◽  
Pulp Mill ◽  
Paper Mill ◽  
Kraft Pulping ◽  
Pulp And Paper ◽  
Small Scale ◽  
Pulp And Paper Mill ◽  
Nitrogen And Phosphorus ◽  
Paper Mills

Small-scale agro-based pulp and paper mills are characterized as highly polluting industries. These mills use Kraft pulping process for paper manufacturing due to which toxic lignified chemicals are released into the environment. Lack of infrastructure, technical manpower, and research and development facilities restricts these mills to recover these chemicals. Therefore, the chemical oxygen demand (COD) of the emanating stream is quite high. For solving the above problem, four bacteria were isolated from the premises of agro-based pulp and paper mill which were identified as species ofPseudomonas, Bacillus, Pannonibacter, andOchrobacterum. These bacteria were found capable of reducing COD up to 85%–86.5% in case of back water and 65-66% in case of back water : black liquor (60 : 40), respectively, after acclimatization under optimized conditions (pH 6.8, temperature 35°C, and shaking 200 rpm) when the wastewater was supplemented with nitrogen and phosphorus as trace elements.

scholarly journals Wastewater Treatment Technology for Small Scale Pulp and Paper Mills in Thailand (Part 3)

2001 ◽  
Vol 55 (12) ◽  
pp. 1742-1749,017
Author(s):  
Hiromutsu Wada ◽  
Prisnar Siriacha ◽  
Yoshinari Kobayashi
Keyword(s):  
Wastewater Treatment ◽  
Pulp And Paper ◽  
Small Scale ◽  
Treatment Technology ◽  
Pulp And Paper Mills ◽  
Paper Mills

Photo-catalytic degradation of gaseous pollutants in paper mills of southern China

TAPPI Journal ◽  
2018 ◽  
Vol 17 (03) ◽  
pp. 167-178 ◽  
Author(s):  
Xin Tong ◽  
Jiao Li ◽  
Jun Ma ◽  
Xiaoquan Chen ◽  
Wenhao Shen
Keyword(s):  
Degradation Rate ◽  
Southern China ◽  
Catalytic Degradation ◽  
Pulp And Paper ◽  
Gaseous Pollutants ◽  
Pulp And Paper Mills ◽  
Paper Mills ◽  
Initial Concentration ◽  
First Order ◽  
First Order Kinetics

Studies were undertaken to evaluate gaseous pollutants in workplace air within pulp and paper mills and to consider the effectiveness of photo-catalytic treatment of this air. Ambient air at 30 sampling sites in five pulp and paper mills of southern China were sampled and analyzed. The results revealed that formaldehyde and various benzene-based molecules were the main gaseous pollutants at these five mills. A photo-catalytic reactor system with titanium dioxide (TiO2) was developed and evaluated for degradation of formaldehyde, benzene and their mixtures. The experimental results demonstrated that both formaldehyde and benzene in their pure forms could be completely photo-catalytic degraded, though the degradation of benzene was much more difficult than that for formaldehyde. Study of the photo-catalytic degradation kinetics revealed that the degradation rate of formaldehyde increased with initial concentration fitting a first-order kinetics reaction. In contrast, the degradation rate of benzene had no relationship with initial concentration and degradation did not conform to first-order kinetics. The photo-catalytic degradation of formaldehyde-benzene mixtures indicated that formaldehyde behaved differently than when treated in its pure form. The degradation time was two times longer and the kinetics did not reflect a first-order reaction. The degradation of benzene was similar in both pure form and when mixed with formaldehyde.

ENVIRONMENTAL IMPACT OF PULP AND PAPER MILLS

2012 ◽  
Vol 11 (1) ◽  
pp. 81-85 ◽  
Author(s):  
Dan Gavrilescu ◽  
Adrian Catalin Puitel ◽  
Gheorghe Dutuc ◽  
Grigore Craciun
Keyword(s):  
Environmental Impact ◽  
Pulp And Paper ◽  
Pulp And Paper Mills ◽  
Paper Mills

Biotreatability test of bleach wastewaters from pulp and paper mills

1997 ◽  
Vol 35 (2-3) ◽  
pp. 101-108
Author(s):  
X. Wang ◽  
T. H. Mize ◽  
F. M. Saunders ◽  
S. A. Baker
Keyword(s):  
Wastewater Treatment ◽  
Pulp And Paper ◽  
Reductive Dehalogenation ◽  
Continuous Reactor ◽  
Batch Reactors ◽  
Aerobic Treatment ◽  
Pulp And Paper Mills ◽  
Paper Mills ◽  
Degradation Rates ◽  
Adsorbable Organic Halide

Research is focused on an integrated way to simultaneously optimize the bleaching operations and subsequent wastewater treatment for pulp and paper mills. Bleach wastewaters from ClO2-bleached pulping studies at Institute of Paper Science and Technology (IPST) were used as the feed for batch reactors to test and rank the treatability and kinetics. The key aspect of the system is the use of sequential anaerobic/aerobic phases to enhance reductive dehalogenation of chloro-organic materials. Two continuous reactor systems, one operated in an anaerobic-aerobic mode and a second in an aerobic-aerobic mode, received bleaching wastewater obtained from a full-scale plant. Acclimated cultures from both continuous reactors were used to quantify the AOX (Adsorbable Organic Halide) and COD removal from various bleaching wastewaters. In general, the sequential anaerobic/aerobic treatment of bleach wastewater can improve both biotreatability and degradation rates.

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