scholarly journals Aspergillus oryzae Grown on Rice Hulls Used as an Additive for Pretreatment of Starch-Containing Wastewater from the Pulp and Paper Industry

Fermentation ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 317
Author(s):  
Stefania Costa ◽  
Daniela Summa ◽  
Federico Zappaterra ◽  
Riccardo Blo ◽  
Elena Tamburini
Keyword(s):  
Aspergillus Oryzae ◽  
Reducing Sugars ◽  
Amylase Activity ◽  
Paper Industry ◽  
Paper Mill ◽  
Point Of View ◽  
Rice Hulls ◽  
Wastewater Bioremediation ◽  
Paper Mill Wastewater ◽  
Fermentation Technology

From an industrial point of view, the use of microorganisms as a wastewater bioremediation practice represents a sustainable and economic alternative for conventional treatments. In this work, we investigated the starch bioremediation of paper mill wastewater (PMW) with Aspergillus oryzae. This amylase-producing fungus was tested in submerged fermentation technology (SmF) and solid-state fermentation (SSF) on rice hulls. The tests were conducted to assay the concentration of the reducing sugars on paper mill wastewater. The bioremediation of starch in the wastewater was carried out by A. oryzae, which proved capable of growing in this complex media as well as expressing its amylase activity.

scholarly journals Separation of cellulose from industrial paper mill wastewater dried sludge using a commercial and cheap ionic liquid

2019 ◽  
Vol 79 (10) ◽  
pp. 1897-1904 ◽  
Author(s):  
Katarzyna Glińska ◽  
Mohammed Aqlan ◽  
Jaume Giralt ◽  
Esther Torrens ◽  
Agusti Fortuny ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Paper Industry ◽  
Research Work ◽  
Paper Mill ◽  
Environmental Concerns ◽  
Operation Conditions ◽  
Volatile Solvents ◽  
Dried Sludge ◽  
Paper Mill Wastewater ◽  
The Impact

Abstract Industrial wastewaters and their treatment are now placed at the heart of the environmental concerns that industries face. Some research work has been carried out in order to limit the impact of these wastes on the environment as well as their costs. In this study, wastewater dehydrated sludge (55% wt. water content) from the paper industry was used to recover cellulose by using tetrakis(hydroxymethyl)phosphonium chloride, [P(CH2OH)4]Cl, ionic liquid as a solvent. The ionic liquid has shown remarkable results in terms of cellulose extraction in addition to its non-volatility and lower toxicity compared to organic volatile solvents. All cellulose, based on dry sludge, was recovered from the industrial dehydrated sludge with better operation conditions. The influence of temperature and the quantity of ionic liquid was preliminary studied in order to optimise the extraction conditions.

Evaluation of an Aerator Control Strategy Utilizing Time Varying Mathematical Model Simulations

1986 ◽  
Vol 18 (6) ◽  
pp. 189-201 ◽  
Author(s):  
D. A. Barton ◽  
J. J. McKeown
Keyword(s):  
Mathematical Model ◽  
Loading Rate ◽  
Paper Industry ◽  
Paper Mill ◽  
Organic Loading Rate ◽  
Variable Model ◽  
Effluent Quality ◽  
Control Scheme ◽  
Paper Mill Wastewater ◽  
Reduction Percentage

A mechanistic mathematical model of the aerated stabilization basin process utilized in the pulp and paper industry is presented. The time variable model is calibrated for a paper mill wastewater treatment system and is used to develop and test a control scheme for the optimization of aeration intensity. The control scheme is shown to reduce aerator usage on an annual basis by seventeen to thirty percent compared to the case of no control. The aerator usage reduction percentage was found to be inversely related to the organic loading rate per aerator horsepower. Savings in aerator usage under the control scheme were equivalent to the existing practice of seasonal aeration control. However, modest improvements in effluent quality variability were observed under the control scheme.

Pulp and paper industry wastewater treatment: use of microbes and their enzymes

2020 ◽  
Vol 5 (10) ◽  
Author(s):  
Chhotu Ram ◽  
Pushpa Rani ◽  
Kibrom Alebel Gebru ◽  
Mebrhit G Mariam Abrha
Keyword(s):  
Chemical Constituents ◽  
Paper Industry ◽  
Oxygen Demand ◽  
Cost Effective ◽  
Paper Mill ◽  
Pulp And Paper Industry ◽  
Pulp And Paper ◽  
Complex Nature ◽  
Paper Mill Effluents ◽  
Paper Mill Wastewater

AbstractPulp and paper industry is coming under one of the most water polluting industries, and generated wastewater is highly toxic in nature. The paper mill requires huge quantity (~50–60 m3 of water to produce one ton of paper) of water, and accordingly huge quantity of chemical contaminated wastewater is discharged. The paper mill effluents have identified 240–250 chemicals in different stages of paper making. Various chemical constituents such as high chemical oxygen demand, biochemical oxygen demand, AOX, chlorinated compounds, color, suspended materials, lignin and their derivatives are released in the wastewater. The present review study is focused on the paper mill processes, wastewater generation and its effective treatment by microorganisms. The biological treatment has been identified as cost-effective and eco-friendly methods for the degradation of xenobiotic compounds for paper mill wastewater. Various studies have been performed so far to investigate the complex nature of wastewater by the application of bacteria, fungi and their enzymes at industrial scale. Therefore, the article discussed the importance of biological method as an effective technique for the degradation of paper mill wastewater.

Economics of a Nordic paper mill: case study

2010 ◽  
Vol 110 (1) ◽  
pp. 5-23
Author(s):  
Esa Hämäläinen ◽  
Ulla Tapaninen
Keyword(s):  
Financial Management ◽  
Paper Industry ◽  
Paper Mill ◽  
Statistical Correlation ◽  
Point Of View ◽  
Process Data ◽  
Long Distance ◽  
Paper Mills ◽  
Content Type

PurposeThe purpose of this paper is to reveal how the prices, costs, and logistics develop in the case mill and how these variables correlate with profits, and finally to give suggestions for improvements.Design/methodology/approachA typical Finnish paper mill is selected for the basis of the case study. The complete data for the mill for the years 2001 to 2007 at a monthly level are used. The data are obtained from the mill's financial management system and transferred to Excel. Statistica 4.1 software is used to run the statistical correlation analyses. The results can be generalized with certain limitations to paper manufacturing located at a long distance from its customers.FindingsThis paper gives an important insight into the economics of the Finnish paper industry. From theory‐building point of view, the empirical process data show that the variation in production lines is minimal, but there are important variations in paper deliveries. A lot can be gained in the logistics processes. Larger volumes delivered in tons also tend to increase profits. From the mill to the consignees, fluctuations in the process and paper sales grow substantially, which indicates longer storage times.Research limitations/implicationsThe results of the case study are based on the data of a single large integrated paper mill in Finland covering the years 2001‐2007, so the results cannot be directly generalized to concern all Nordic paper mills. In May 2005, there was an industrial blackout, which considerably affected the production and deliveries of all Finnish paper mills in that year.Practical implicationsThe competitive advantages of the Finnish paper industry are undermined by low paper prices and costly logistics. The mill managers should increasingly focus on overcapacity and cost issues and also deliver volumes, which all could contribute to higher profits.Originality/valueIn this paper, the Finnish paper industry is studied through a time series, economic geography, and statistical tools. This approach is a novel method and gives new insights into this research object. The mill's economic variables, such as paper prices, profits, and logistics and manufacturing costs, and the characteristics of these issues in a spatial context are studied.

The Use of Coagulation-UV Irradiation/H2O2 and Electrocoagulation Methods on Pulp and Paper Mill Wastewater Treatment

2018 ◽  
Vol 280 ◽  
pp. 393-398 ◽  
Author(s):  
G. Yuliani ◽  
R. Agustiningsih ◽  
H. S. Halimatul Munawaroh ◽  
N. F. Rahmi
Keyword(s):  
Wastewater Treatment ◽  
Uv Irradiation ◽  
Irradiation Time ◽  
Paper Industry ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Pulp And Paper Mill ◽  
Nacl Concentration ◽  
Paper Mill Wastewater ◽  
Physical And Chemical

Effluents from pulp and paper mill typically consist of high loading of inorganics compounds (e.g., Na2CO3, Na2S, NaOH and NaCl) and organics compounds (e.g., lignin and polysaccharides fragments, alcohols, carboxylic acids) Several methods, such as biological, physical and chemical treatment, have been reported to degrade these molecules. However, coagulation is by far the cheapest, simplest and most common method employed for secondary wastewater treatment to reduce colour and organics. In this research, two most widely used methods were employed to treat a model wastewater of pulp and paper industry, namely a combination of coagulation-flocculation-UV irradiation/H2O2 and electrocoagulation (EC). In the application of coagulation-flocculation-UV irradiation/H2O2 method, the decrease in colour (measured as absorbance at 500 nm) was 71%, and the COD removal was measured to be 38% under the optimum conditions of pH 8, coagulant dose of 700 ppm, flocculant dose of 60 ppm, 130 rpm of coagulant stirring rate, 1 day irradiation time, and 25 mM of H2O2. For the EC method, 91% reduction of color and 84% reduction of COD were achieved at 40 min of electrolysis time, pH of 8, 600 ppm of NaCl concentration, electrode distance of 1.5 cm and 2 V of voltage. The EC method may serve as an efficient method for color and organics removals from pulp and paper mill wastewater.

Treatment of Different Wastewaters from Pulp and Paper Industry in Methane Reactors

1985 ◽  
Vol 17 (1) ◽  
pp. 223-230 ◽  
Author(s):  
P K Latola
Keyword(s):  
Power Plant ◽  
Paper Industry ◽  
Granular Sludge ◽  
Paper Mill ◽  
Pulp And Paper Industry ◽  
Pulp And Paper ◽  
Plastic Foam ◽  
Loading Rates ◽  
Multi Stage ◽  
Removal Efficiencies

A wastewater from an integrated paper mill with a COD of 1200 mg/dm3 was anaerobically treated in a multi-stage reactor. The BOD7 removal efficiencies of 60-75 % were achieved at maximal loading rates of 5-6 kg COD/m3d and HRT of 4-6 hours due to the granular sludge. Industrial sulphite evaporator condensates from Ca- and Na-processes were treated in anaerobic filters containing light gravel, plastic foam and power plant slag as filter media. The BOD7 removals of 78 % on average were achieved at loading rates of 1.8-3.3 kg COD/m3d with Ca-process evaporator condensates and 80 % BOD7 removals were achieved with Na-process condensates at loading rates of 3.5-4.1 kg COD/m3d.

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