Pulp and paper
Babak Mirzaei; Kazem Dos hosseini; Esmaeil Ghasemi; Yahya Hamzeh
Abstract
In this study two types of paper sludge, prepared by Mazandaran wood and paper company and Latif papermaking company along with wood flour utilized as plastic filler in polypropylene and high density polyethylene based composites. Weight percentage ratio of coupling agent, polymer and filler were kept ...
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In this study two types of paper sludge, prepared by Mazandaran wood and paper company and Latif papermaking company along with wood flour utilized as plastic filler in polypropylene and high density polyethylene based composites. Weight percentage ratio of coupling agent, polymer and filler were kept constant 2%, 38%, and 60% in all formulations, respectively and composites were prepared by varied ratios of paper sludge and wood flour include 0: 60, 40: 20, 20: 40, and 60:0. Density, water absorption and thickness swelling of injection molded composites then measured. The results indicated the gradual substitution of wood flour by paper sludge increases the density of composites, and improves their water absorption and thickness swelling. The ratio of paper sludge to wood flour had statistically significant difference on all these properties, but the paper sludge type showed statistical difference just on the density of composites. Further to that, polypropylene based composites demonstrated lower density, water absorption and thickness swelling compared to high density polyethylene based ones.
Pulp and paper
Yahya Hamzeh; Babak Mirzaei; Kazem Dost hosseini; Alireza Ashori; Kambiz Rashedi; Alyeh olfat
Abstract
Characteristics of pulp and paper mill solid wastes depend generally on the raw materials, stock preparation process as well as wastewater treatment plant. In order to determine the best application of paper mill solid wastes, physicochemical properties of solid waste produced in the Mazandaran Wood ...
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Characteristics of pulp and paper mill solid wastes depend generally on the raw materials, stock preparation process as well as wastewater treatment plant. In order to determine the best application of paper mill solid wastes, physicochemical properties of solid waste produced in the Mazandaran Wood and Paper Industry Co. and Latif Paper Co. were analyzed. The dry content, pH, fiber dimensions, composition of organic and inorganic compounds of the both solid were analyzed. The dry content of the produced wastes in Latif and Mazandran were determined as 69.3 and 36.7 percent, respectively. The pH of both wastes was close to neutral (pH/7.0). The fiber length of Latif and Mazandaran wastes were 1.68 and 1.08 mm, respectively. In addition, the total amount of carbohydrates, glucose and mannose quantity in the Latif waste were determined as 48.09, 29.5 and 7.2 percent that were higher than that of Mazandaran waste. In the contrary, the lignin, xylose and galactose content of Mazandaran waste were determined as 15.3, 17.3 and 3.7 percent that were higher than those of Latif waste. The mineral content of Latif and Mazandarn wastes were determined 44.7 and 39.5 percent, respectively. XRF analyses revealed that the predominant elements in the incinerated ash of both wastes contained calcium oxide, aluminum oxide and silicon oxidethat can be used as raw material for lightweight concrete and zeolite synthesis.
Pulp and paper
Aghdas Sadeghi; Ali Abdolkhani; Yahya Hamzeh; Ahmad Mirshokraei; Alinaghi Karimi
Abstract
In this study the pulping of bagasse using TMAH and EDA as organic bases was investigated and compared to conventional Soda and Soda-AQ bagasse pulping. Resulting pulps properties including Kappa number, reject, screen yield of pulp and optical and mechanical properties of handsheets prepared from them ...
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In this study the pulping of bagasse using TMAH and EDA as organic bases was investigated and compared to conventional Soda and Soda-AQ bagasse pulping. Resulting pulps properties including Kappa number, reject, screen yield of pulp and optical and mechanical properties of handsheets prepared from them were determined and compared. Kappa number of TMAH pulp was considerably lower than others. Also, optical properties of TMAH and TMAH-NaOH pulps were considerably higher than Soda and Soda-AQ reference pulps. As well as, addition of EDA to pulping liquor resulted suitable pulp with better properties compared to Soda pulp. Based on the obtained results, it was concluded that the delignificatiom mechanism of TMAH differ to hydroxide ion from NaOH and probably it improves the delignification rate through increasing of lignin degradation and its solubility.
