scholarly journals Treatment of Wastewater from Pulp and Paper Mill using Coagulation and Flocculation

2020 ◽  
Vol 9 (1) ◽  
pp. 158-163
Keyword(s):  
Zeta Potential ◽  
Oxygen Demand ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Pulp And Paper Mill ◽  
Chemical Parameters ◽  
Coagulation And Flocculation ◽  
Physico Chemical ◽  
Paper Wastewater ◽  
Local Medium

In this work, an effluent sample from a local medium-scale paper mill has been treated using alum as a coagulant and chitosan (natural polymer) as a flocculant. Initially, the dose of alum has been optimized by adjusting the zeta potential to near zero for best coagulation results. The dose of 0.04 g/L was able to merely coagulate and unable to cause sweep flocculation of impurities. Then, at the optimised dose of 0.04 g/L various concentrations of chitosan in the range of 0.1-0.5 g/L were investigated for obtaining maximum flocculation of the suspended impurities. The physico-chemical parameters like pH, total suspended solids (TSS), chemical oxygen demand (COD), absorbance, and zeta potential were studied for comprehending the flocculation behavior. The observed results exhibited that the maximum flocculation was achieved at the chitosan concentration of 0.3 g/L. At the flocculant concentration of 0.3 g/L, 81% TSS removal and maximum 78% COD were reduced. Moreover, zeta potential value of the collected supernatant was close to zero (–1.49 mV) which showed larger floc formation and easy settleability of the impurities. In all, it can be said that the utilization of chitosan along with alum may be a better option for the treatment of pulp and paper wastewater as well as other similar types of wastewater.

Water Quality of the River Sava at the Inflow of a Pulp and Paper Mill Effluent

1990 ◽  
Vol 22 (5) ◽  
pp. 189-194 ◽  
Author(s):  
V. V. Cibulić
Keyword(s):  
Treatment Plant ◽  
Oxygen Demand ◽  
Paper Mill ◽  
Negative Influence ◽  
Pulp And Paper ◽  
Water Levels ◽  
Toxic Substances ◽  
Pulp And Paper Mill ◽  
Paper Mill Effluent ◽  
High Concentrations

The results of investigations into the effects of wastewaters from pulp and paper production on the River Sava are presented in this paper. Two situations were studied, i.e., when the treatment plant was in operation and when it was not working. The results of the investigations indicated that the wastewaters had significant effects on the Sava. Chemical oxygen demand (COD) and biochemical oxygen demand (BOD) were increased and some toxic substances were present at high concentrations, e.g., phenols, oils and grease, dyestuff, etc. The negative influence of the wastewaters was greater during the summer, at low water levels in the Sava. The Sava is a tributary of the River Danube, into which the pollution from this river finally flows. Regardless of the water flow rates, toxic substances are constantly accumulating, and, as a result, even such large systems as the Danube and the Sava are becoming more and more polluted.

The Eutrophication of Pulp and Paper Wastewater Recipients

1991 ◽  
Vol 24 (3-4) ◽  
pp. 411-415 ◽  
Author(s):  
J. Wartiovaara ◽  
P. Heinonen
Keyword(s):  
Biological Treatment ◽  
Nutrient Loading ◽  
Paper Industry ◽  
Paper Mill ◽  
Pulp And Paper Industry ◽  
Pulp And Paper ◽  
Pulp And Paper Mill ◽  
Paper Wastewater ◽  
The Cost

During recent years the BOD-loading of pulp and paper mill wastewaters has decreased dramatically, due to more effective circulation of water in the processes, and the new activated sludge biological treatment plants. This traditional threat to the environment has been forgotten by the scientists who nowadays are more interested in the role of chlorine compounds discharged from bleaching processes. However, eutrophication due to nutrient loading is still present in many recipients of pulp and paper industry. The BOD-reduction has often been carried out on the cost of adding nutrients, pnosphorus and nitrogen to the purification processes. The biological treatment has also decreased the inhibitive effect of wastewater on the biological production of the recipient water body. Therefore, the eutrophication arises immediatly. The authors worry about the research of nutrients; loadings, development trends and eutrophication effects.

scholarly journals A review on bioremediation of pulp and paper mill effluent – An alternative to conventional remedial technologies

2018 ◽  
Vol 10 (1) ◽  
pp. 367-374 ◽  
Author(s):  
Sangeeta Madan ◽  
Preeti Sachan ◽  
Utkarsh Singh
Keyword(s):  
Biological Treatment ◽  
Oxygen Demand ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Residual Effects ◽  
Organic Load ◽  
Pulp And Paper Mill ◽  
Paper Mills ◽  
Paper Mill Effluent ◽  
Paper Mill Effluents

At present, a large amount of water required for paper production and various chemicals has been identified in effluents, which is produced at different steps of paper making in paper mills. The pulp and paper industry is typically related to pollution difficulties related to high biological oxygen demand (BOD), chemical oxygen demand (COD), colour, suspended solids, lignin and chlorinated compounds. Several studies have been made on eliminate these difficulties of pulp and paper effluents, the problem still continues. Although the physical and chemical methods are on the track of treatment, they are not on par with biological treatment because of cost ineffectiveness and residual effects. The biological treatment is known to be effective in reducing the organic load and toxic effects of paper mill effluents. Some microorganisms including bacteria and fungi have been involved in degrading the chemicals present in pulp and paper mill effluent. This article is an overview of the attempts made by several researchers worldwide to use biotechnological methods for degradation of the toxic compounds present in pulp and paper mill effluents by using fungi, bacteria, algae and enzymes. The current study clearly shows that application of native dominant bacterial and fungal isolates may be used forthe treatment of large pulp and paper mills effluents.

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 Novosphingobium nitrogenifigens sp. nov., a polyhydroxyalkanoate-accumulating diazotroph isolated from a New Zealand pulp and paper wastewater

2007 ◽  
Vol 57 (11) ◽  
pp. 2467-2471 ◽  
Author(s):  
Sarah L. Addison ◽  
Sonia M. Foote ◽  
Nicola M. Reid ◽  
Gareth Lloyd-Jones
Keyword(s):  
New Zealand ◽  
Type Strain ◽  
Gene Sequence ◽  
Sequence Data ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Rrna Gene ◽  
Pulp And Paper Mill ◽  
Paper Mill Effluent ◽  
Paper Wastewater

A diazotroph capable of accumulating significant amounts of polyhydroxyalkanoate was isolated in New Zealand from a bioreactor treating nitrogen-deficient pulp and paper-mill effluent. Strain Y88T is Gram-negative, rod-shaped and positive for catalase, nitrate reductase and urease activities. The complete 16S rRNA gene sequence was most similar to those of other members of the genus Novosphingobium, the highest level of similarity (94.7 %) being found with respect to the type strain of Novosphingobium stygium. The combined phenotypic, chemotaxonomic and sequence data show that while strain Y88T belongs to the genus Novosphingobium, it is distinct from all currently recognized Novosphingobium species. Therefore, strain Y88T represents the first nitrogen-fixing species of the genus Novosphingobium, for which the name Novosphingobium nitrogenifigens sp. nov. is proposed. The type strain is Y88T (=ICMP 16470T=DSM 19370T).

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 Coagulation and UF treatment of pulp and paper mill wastewater in comparison

2012 ◽  
Vol 10 (1) ◽  
pp. 127-136 ◽  
Author(s):  
Marjana Simonič ◽  
Doroteja Vnučec
Keyword(s):  
Ceramic Membrane ◽  
Oxygen Demand ◽  
Active Surface ◽  
Paper Mill ◽  
Pilot Scale ◽  
Pulp And Paper ◽  
Pulp And Paper Mill ◽  
Polyaluminum Chloride ◽  
Paper Mills ◽  
Paper Mill Wastewater

AbstractA study using coagulation-flocculation and ultrafiltration (UF)methods for pulp and paper mills’ wastewater (WW)was carried out. The reduction efficiencies of turbidity and chemical oxygen demand (COD), the removal efficiency of total suspended solids (TSS) and absorbance at 254 nm were the main evaluating parameters. Using coagulation-flocculation, the efficiencies of alum and polyaluminum chloride (PACl)were studied, when used alone and when coupled with flocculant aids. During the coagulation-flocculation process, use of a single coagulant, the coagulant dosage, and the pH, play an important role in determining the coagulation efficiency. At the optimum PACl dosage of 840 mg L−1 and optimum pH of 9.0, turbidity reduction was found to be 94.5%. A combination of inorganic coagulant and flocculant, or polymer was applied, in which PACl was used coupled with the polyelectrolytes Organopol WPB20 and WPB40. PACl coupled with Organopol WPB20 by optimal pH 9 gave a 98.3% reduction of turbidity, 91.9% removal of TSS, and a 60.2% reduction in COD. Ultrafiltration trials were carried out on a pilot scale. A tubular module was used with ceramic membrane. This membrane is a multi-channel membrane with an active surface layer made of Al2O3 and ZrO2. Within the acidic range, the turbidity and TSS were removed at above 99%.

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