scholarly journals Improvement of Fiber Fines Retention and Mechanical Properties of Board Paper Using Corn and Tapioca Starch- A Handsheet Study

2021 ◽  
pp. 39-50
Author(s):  
Klaus Doelle ◽  
Jonas Sonntag ◽  
Kai Fischer ◽  
Tyler Dominesey
Keyword(s):  
Paper Industry ◽  
Fiber Material ◽  
Cationic Starch ◽  
Renewable Materials ◽  
Tapioca Starch ◽  
Fines Content ◽  
Mesh Screen ◽  
Efficient Resource ◽  
Addition Rate ◽  
Solids Content

Steadily increasing production cost in the paper industry require more efficient resource allocation and utilization of recycled materials and the use of renewable materials and additives to become more environmentally friendly. With this project, 100 g/m² TAPPI handsheets from industrial processed OCC fiber material were produced, without starch and starch in cooked and uncooked form, air-dried at 23°C and contact-dried at 120°C. Starch addition levels were 6.0, 18.0 and 24.0 kg/mt (12.0, 36.0, and 48.0 lbs./st) for pearl and cationic starch, and 2.0, 6.0 and 8.0 kg/mt (4.0, 12.0, and 16.0 lbs./st) for tapioca starch. Fines were measured with a Britt Jar devise having a 75 μm (200 mesh) screen. The highest tensile index improvement of 35.71% for uncooked tapioca starch at an addition rate of 16 lbs./st. The highest tear index improvement of 1.86% was for pearl starch at an addition rate of 12 lbs./st for the cooked & contact dried application. The highest burst index improvement of the produced handsheets was for uncooked & contact dried cationic starch at an addition rate of 12 lbs./st with an improvement of 21.49%. Application of pearl starch showed the largest difference in fines content at the 12 lbs./st and 48 lbs./st of fiber concentrations, reducing the fines content by 22.2% and 24.7% based on solids content respectively. Pearl starch outperformed cationic and tapioca starch products and showed the highest potential for fiber savings and net profit value.

Correlation of wood-based components and dewatering properties of waste activated sludge from pulp and paper industry

2010 ◽  
Vol 62 (2) ◽  
pp. 387-393 ◽  
Author(s):  
H. Kyllönen ◽  
J. Lehto ◽  
P. Pirkonen ◽  
A. Grönroos ◽  
H. Pakkanen ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Paper Industry ◽  
Bound Water ◽  
Calorific Value ◽  
Pulp And Paper Industry ◽  
Pulp And Paper ◽  
Waste Activated Sludge ◽  
Paper Mills ◽  
Elementary Analysis ◽  
Solids Content

Large amounts of wet sludge are produced annually in municipal and industrial wastewater treatment. Already in pulp and paper industry, more than ten million tons of primary sludge, waste activated sludge, and de-inking sludge is generated. Waste activated sludge contains large quantities of bound water, which is difficult to dewater. Low water content would be a matter of high calorific value in incineration but it also has effects on the volume and the quality of the matter to be handled in sludge disposal. In this research waste activated sludges from different pulp and paper mills were chemically characterised and dewatered. Correlations of chemical composition and dewatering properties were determined using multivariate analysis. Chemical characterisation included basic sludge analysis, elementary analysis and analysis of wood-based components, such as hemicelluloses and lignin-derived material. Dewatering properties were determined using measurements of dry solids content, flux and flocculant dosage. The effects of different variables varied according to the response concerned. The variables which were significant regarding cake DS increase in filtration or centrifugation and flocculant dosage needed in filtration were different from those which were significant regarding flux.

Spray atomization simulation of bamboo kraft black liquor with high solid content at splash-plate nozzle

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 6599-6612
Author(s):  
Yongjian Xu ◽  
Shenglin Chen ◽  
Xin Du ◽  
Xiaopeng Yue
Keyword(s):  
Paper Industry ◽  
Black Liquor ◽  
Injection Pressure ◽  
Development Trend ◽  
Solid Content ◽  
Nozzle Diameter ◽  
Spray Atomization ◽  
Kraft Black Liquor ◽  
Fluent Software ◽  
Solids Content

Increasing the solids content of pulping black liquor burned in a furnace is a development trend of the alkali recovery system in the pulp and paper industry. However, the viscosity of kraft black liquor increases exponentially with an increase in solids content, especially in the case of non-wood pulping black liquor, such as bamboo. This brings great difficulties to the pulping system and atomization of black liquor at the splash-plate nozzle, which is a complete atomization unit constituted of a splash nozzle and a splash plate. To obtain instructive results for industry, a simulation of the atomization process was made using Fluent software for the bamboo kraft black liquor with solids contents of 70 wt% and 80 wt%, which flowed through splash nozzles with the diameter of 22 or 20 mm. The studies were conducted on the distribution of flow field in the nozzle and atomization region through changing the injection pressure and nozzle diameter. The variation of atomization characteristic parameters, such as liquid film thickness, and breakup length, were elucidated. The results reveal the relationship between spray atomization with injection pressure and nozzle diameter, which provides a theoretical basis for improving the concentration of black liquor entering alkali recovery in the future.

scholarly journals Investigation of the Adsorption Behavior of Jet-Cooked Cationic Starches on Pulp Fibers

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2249
Author(s):  
Esther Ferstl ◽  
Martin Gabriel ◽  
Florian Gomernik ◽  
Stefanie Monika Müller ◽  
Julian Selinger ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Paper Industry ◽  
Adsorption Behavior ◽  
Adsorption Efficiency ◽  
Pulp Fibers ◽  
Cationic Starch ◽  
Starch Properties ◽  
Cooking Temperature ◽  
Cellulosic Pulp ◽  
Jet Cooking

The optimization of the thermal treatment of cationic starch in the paper industry offers the opportunity to reduce the energy consumption of this process. Four different industrially relevant cationic starches, varying in source, cationization method and degree of substitution were treated by a steam-jet cooking procedure, comparable to industrially employed starch cooking processes. The influence of the starch properties and cooking parameters on the adsorption behavior of the starches on cellulosic pulp was investigated. The adsorbed amount was affected by the cooking temperature and the type of starch. For some starch grades, a cooking temperature of 115 °C can be employed to achieve sufficient starch retention on the pulp fibers. The energy consumption could further be reduced by cooking at higher starch concentrations without loss of adsorption efficiency.

scholarly journals PATI TERMODIFIKASI ENZIMATIS SEBAGAI KOMPONEN PEREKAT BAHAN SALUT KERTAS CETAK

2016 ◽  
Vol 2 (01) ◽  
Author(s):  
Nina Elyani ◽  
Jenni Rismijana ◽  
Teddy Kardiansyah ◽  
Cucu ,
Keyword(s):  
Kraft Pulp ◽  
Paper Industry ◽  
Dry Weight ◽  
Modified Starch ◽  
Cationic Starch ◽  
Water Penetration ◽  
Paper Properties ◽  
Bleached Kraft Pulp ◽  
Base Paper ◽  
Printing Paper

This research has been conducted through several steps. Step I was base papermaking using 80% LBKP and 20 % NBKP. They were refine separately up to 300 ml CSF, then mixed with 15% CaCO3, 0.6% AKD, 0.5% poliacrylamide, and 1,5% cationic starch to dry-weight of fibers. Step II was modifying starch enzymaticaly at 70-75°C, pH 6.5 - 7.0, amylase 0,05% for 15 minutes. Step III was base-paper coating with varied adhesives. Variation I use natural starch, Variation II use enzymatic modified starch, Variation III use commercial starch each of 8%. Testing for the handsheets comprise of brightness, roughtness, picking strength, water penetration, and pH. The results showed that the viscosity for natural starch, enzymatic starch and commercial starch respectively at 8000 cPs, 26 cPs and 114 cPs. The use of enzymatic modified starch give the best paper properties. The experiments has replicated in a laboratory of paper industry, with the same results, using clay and CaCO3 at 40:60 ratio, enzymatic starch, commercial starch, and natural starch.Keywords: starch, coated printing paper, amylase, viscosity.  ABSTRAK Penelitian ini dilakukan melalui beberapa tahapan. Tahap I adalah pembuatan kertas dasar dengan menggunakan bahan baku 80% serat pendek atau leaf bleached kraft pulp (LBKP) dan 20% serat panjang atau needle bleached kraft pulp ( NBKP) digiling secara terpisah hingga mencapai derajat giling 300 ml CSF. Selanjutnya pulp dicampur ke dalam bahan kimia yang terdiri 15 % CaCO3, 0,6% AKD, 1,5% pati kationik dan Poliakrilamida sebesar 0,5% terhadap berat kering pulp. Lembaran dibuat pada gramatur 60 g/m2. Tahap II adalah pembuatan pati termodifikasi enzimatis pada kondisi inkubasi suhu sekitar 70 – 75oC, pH : 6,5 – 7,0, waktu selama 15 menit dengan penambahan amilase sebesar 0,05%. Tahap III adalah proses penyalutan kertas dasar dengan pati termodifikasi enzimatis, sebagai pembanding menggunakan pati alam maupun pati komersial. Kemudian dilakukan pengujian terhadap lembaran yang dihasilkan meliputi : derajat putih, kekasaran, penetrasi minyak, ketahanan cabut, daya serap air dan pH. Selanjutnya dilakukan uji coba di industri dengan komposisi pigmen kaolin dan kalsium karbonat 40 : 60 menggunakan pati enzim, pati komersial, dan pati alam. Hasil percobaan menunjukkan bahwa viskositas untuk pati alam, pati enzim dan pati komersial masing-masing adalah sebasar 8000 cPs, 26 cPs dan 114 cPs. Penggunaan pati modifikasi enzim memberikan sifat kertas yang paling baik. Hasil replikasi percobaan di laboratorium industri, pati enzim juga menghasilkan sifat kertas yang lebih baik.Kata kunci: pati, kertas cetak salut, amilase, viskositas.  

Treatment Technologies for Organochlorine-Containing Sludges and Concentrates from External Treatment of Pulp and Paper Wastewaters

1991 ◽  
Vol 24 (3-4) ◽  
pp. 319-329 ◽  
Author(s):  
M. Almemark ◽  
G. Finnveden ◽  
B. Frostell
Keyword(s):  
Paper Industry ◽  
Pulp Mill ◽  
Pulp And Paper Industry ◽  
Pulp And Paper ◽  
Effluent Treatment ◽  
Organochlorine Compounds ◽  
Chlorinated Phenols ◽  
Chemical Coagulation ◽  
Solids Content ◽  
Available Information

Literature data and results from current Swedish research have been used to compile characteristics of and disposal methods for sludges and concentrates from external treatment of wastewaters from the pulp and paper industry. Very little sludge from aerobic lagoon treatment in Sweden is handled, and most of the solids are deposited in the receiving waters. In North America, Finland and Japan, where activated sludge treatment is used to a great extent, sludge handling is an important part of kraft mill effluent treatment. Typically, 5-15 kg of dry solids has to be handled per ton of pulp with a process discharge of 15-20 kg of BOD5/t90- For chemical coagulation, the amounts of sludges produced are higher, typically 40-80 kg dry solids/t90. Especially in Japan, chemical coagulation is used to a great extent. Laboratory and pilot- plant experiments with Ultrafiltration of alkaline stage and total bleach plant effluents suggest that concentrates with a total solids content of approximately 20 and 50 kg dry solids/t90 are produced. The concentrations of organochlorine compounds in sludges and concentrates have not hitherto been well documented, and nor have environmental effects of different disposal methods. Chlorinated phenols, catechols and guaiacols have been found in variable concentrations; chlorinated dibenzodioxins and furans have also been detected. Vacuum filters and especially belt filter presses have been used to dewater sludges. Typical dry solids concentrations achieved vary from 20-35 % for primary sludges to 15-20 % for secondary sludges. Anaerobic digestion may be applied before dewatering of sludges, and methane yields of 200-400 1 CH4/kg VSrem have been reported. Sludge has been disposed of in landfills or incinerated. Leachates from landfilling of pulp and paper industry sludges may contain high levels of soluble organic material, but available information suggests that organochlorine compounds do not leach to a substantial extent. Incineration of pulp mill sludges and concentrates seems to be an increasingly attractive method.

Study on Cationic Starch Graft Copolymer in Papermaking Wastewater Treatment

2011 ◽  
Vol 356-360 ◽  
pp. 1990-1993
Author(s):  
Quan Xiao Liu ◽  
Wen Cai Xu
Keyword(s):  
Wastewater Treatment ◽  
Graft Copolymer ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Wastewater Discharge ◽  
Mass Ratio ◽  
Cationic Starch ◽  
Flocculation Time ◽  
Better Than ◽  
Papermaking Wastewater

Paper industry is one of the major environmental pollution industries in china, pulp and paper industry wastewater discharge amount is from 10% to 12% of the national total wastewater discharge amount. Cationic starch graft copolymer was prepared in laboratory and used to treat papermaking wastewater. The effects of its cationic degree, dosage, flocculation temperature, flocculation time and the combination with alum on papermaking wastewater treatment were investigated. It was found that the best flocculation in the treatment of papermaking wastewater is achieved when cationic degree of cationic starch graft copolymer is 27.38%, adding amount is 15mL, flocculation temperature is 50°C and the mass ratio of alum to cationic starch graft copolymer is 2: 1. The flocculation of composite flocculant made up with alum to cationic starch graft copolymer to papermaking wastewater is much better than only cationic starch graft copolymer is used.

scholarly journals Edible additives & cellulosic paper

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 2114-2116
Author(s):  
Jinming Wan ◽  
Xueren Qian ◽  
Meiyun Zhang ◽  
Shunxi Song ◽  
Jing Shen
Keyword(s):  
Green Chemistry ◽  
Carboxymethyl Cellulose ◽  
Paper Industry ◽  
Cationic Starch ◽  
Cellulosic Paper

Assembly of biofibers into paper-based products fits well into green chemistry principles. Biobased additives such as cationic starch and carboxymethyl cellulose are widely used in the paper industry. Edible additives, which often can be regarded as “safer” than regular biobased additives, may also play a role in tailorable design of paper-based products.

scholarly journals Fungi-resistant basalt fiber material

Surface ◽  
2020 ◽  
Vol 12(27) ◽  
pp. 153-160
Author(s):  
V. M. Shevchenko ◽  
◽  
N. A. Guts ◽  
A. Ye. Shpak ◽  
N. Ye. Vlasenko ◽  
...  
Keyword(s):  
Chemical Industry ◽  
Paper Industry ◽  
Basalt Fiber ◽  
Fiber Material ◽  
Filter Material ◽  
Cellulose Fibers ◽  
Future Generations ◽  
Basalt Fibers ◽  
Industrial Countries ◽  
Digital Formats

Leading industrial countries display the growth of paper industry even more than other industries. The paper is and was very important for our civilization. Technical industries also require the paper. The electro-technical, radio-technical industries use widely various kinds of paper for the production of things like cables, condensers, radio-diffusers, resistors, TV-sets and so on. In the chemical industry papers are used for chromatography, electrophoresis etc. But besides of clear advantages for simple usage there are some another advances for some usage namely materials which are resistant to mold fungi and the microorganisms. It is known that the least subject to the fungi effect are things what are consisted as linen fibers among all as well as sulfite and sulfate cellulose. The artificial fibers are more resistant than natural. Obviously the problem of conservation of already printed on paper materials growths more and more every year. Now it is strange when we can’t read old books which have not being saved in new digital formats. That is why the preserve the old paper literature in worthy state is so important for us and for future generations, and the problem of obtaining so called “biocide” material is so actual. It means such material which may destroy bacteria, mold fungi, and insects. In this work we have used the clays from Zakarpatiyan oblast Horbsky field. These clays are classified as bentonite type and have the following consistence with particular size is between 0,3 and 0,25 mm. The authors studied the sorption of latexes by basalt fibers. The following latexes were investigated: divinyl methyl methacrylate (DMMA), divinyl nitrile (SKN), isoprene nitrile (L-7). A method was used to recharge the surface of cellulose fibers to obtain a flexible, durable filter material. We checked the resistance of materials to mold.

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