Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : recycling


Recycling of Wood – Plastic Composite Prepared from Poly (Ethylene Terephthalate) and Wood Sawdust

Halla M. Shehap; Mohammed A. ALzuhairi; Sarmad I. Ibrahim; Saif S. Hussien

Engineering and Technology Journal, 2021, Volume 39, Issue 11, Pages 1654-1662
DOI: 10.30684/etj.v39i11.2203

Plastic waste has become one of the humanities and the ecosystem balance serious environmental Challenges. Furthermore, it is the primary source of plastic pollution because it is inexpensive, widely available, and frequently discarded. Using various waste materials and side fractions as part of wood-plastic composites is one way to promote the circular economy (WPC). Several environmental benefits can be realized by using recycled plastic, including extending the usable life of plastic, reducing waste, contributing to the development of trash recycling, and preventing resource depletion. One of the most efficient recycling processes is glycolysis; the (PET) is depolymerized by ethylene glycol in continuous stirring reactors at temperatures between 200 and 220◦C using glycol as solvent. This work concentrates on the experimental investigation of composite materials from DE polymerization PET, Unsaturated polyester, and VV/55 as a matrix and wood sawdust as reinforcement. The composite samples were checked by the Hardness test, water test, and density test. According to the experimental results, the optimum value is at (2%) wood percentage, giving high hardness value, low density, and low water absorption.

Framework for Solid Waste Management in Steel Fabrication

Luma A.H. Al-Kindi; Wadood K.Kh. Alghabban

Engineering and Technology Journal, 2019, Volume 37, Issue 2C, Pages 227-236
DOI: 10.30684/etj.37.2C.5

Solid Waste Management (SWM) is a term used to determine greatest energy-efficient and least-polluting ways to deal with the different components and items of community’s Solid Waste stream. The solid waste could be either in solid or liquid form. Solid waste could be defined as, ”Any material that is not required by the owner, fabricator or processor.” Solid Waste could be classified as Domestic waste, Industrial waste, Waste from oil plant, Electronic-waste, Construction waste, Agricultural waste, Food treating waste, Bio-medical waste, and Nuclear waste. Due to social and environmental significances, waste reduces, reuse, and recycle have become necessities in minimizing the environmental damage that could happen through waste disposal. Steel products may be used in various construction and industrial applications, such as machines, bridges, buildings, vessels, highways, machinery, tools, and automobiles. It is estimated that the world’s annual production of Steel is 1500 Million tons and that 85% of annual steel production is recycled worldwide. In this research, a framework for steel fabrication waste management is suggested consists of three stages; these stages are scrap classification stage, reusable scrap stage, and non-reusable scrap stage. The framework is applied in one of the Iraqi Ministry of Oil Companies; the Heavy Engineering Equipment Company, which is an important industrial company specialized in steel fabrication and construction work.

Marshall Characteristic for Reclaimed Asphalt Pavement

Noor Adel Ismaeel; Ayman A. Abdul Mawjoud

Engineering and Technology Journal, 2016, Volume 34, Issue 7, Pages 200-208

The recycling asphalt paving creates a cycle for the use of materials that improve the use of natural resources, as it reduces the use of new materials from the aggregate and asphalt, which can be a rare commodity in some areas. The increasing in the use of milling machines nowadays led to the production of large amount of wasted materials, recycling is consider an important solution that can take them into consideration when creating a network of new roads or rehabilitation of damaged networks. This process has many advantages. It is reduce the environmental pollution and preserves natural resources as well as economic benefit. The main objective of this study is to evaluate recycling material through Marshall test and knowing their validity and can be used in hot mix asphalt in the construction and maintenance of road networks in Iraq, with finding the best ratio of mixing with the new material. Where it was planned to use old materials from one of the streets of Mosul city, while the new material consisting of asphalt Grade (50-60) are included within the aggregate of binder course and cement as a filler. Optimum value of the asphalt content was found by Marshall method through the preparation of a mixture of new material and use this value in the preparation of mixtures of recycled where it was the use of five percentages of recycled materials, namely, (0%, 20%, 30%, 50% and 100%). These mixtures were exposed to : the Marshall test to find their characteristics. The results show that recycling rates up to 50% of recycled materials were perform well within specification limits for use, while 30% was considered as the ideal ratio showed better performance in all characterstics. Showed 30% increase in Marshall stability of the mix for the base mix to more than 41% and other characteristics are within the specification limits.

Study the Effect of Iron Powder Additives on Mechanical properties of Recycling of Aluminum Cans Scrap

Jawad. k. Oleiwi

Engineering and Technology Journal, 2016, Volume 34, Issue 5, Pages 830-838

This paper involves the effect of iron powder in recycling of aluminum cans scrap on some mechanical properties. This process includes burning aluminum cans to remove paint and shredding into small pieces then melting aluminum pieces using an electrical furnace at (750 ºC). Iron powder (0.6, 1.2 and 1.8 wt %) was added to the melt sequentially. The composition is then casted into cylinder steel molds. The mechanical and metallurgical characteristics of the fabricated alloys were studied through an optical microscope including hardness, tensile testing, scanning electronic microscope and X-ray fluorescence. The results indicated that the maximum value of tensile strength and elongation percentage are recorded for the addition of (1.2%) of Iron powder. While maximum modulus of elasticity reported was at (0.6%) Iron powder cast. Hardness also increased with the increase of Iron additives.

New Method for Recycling of waste paper in useful products

Bahra D. Ghafour; Mohammed A. A; Falak O. Abas

Engineering and Technology Journal, 2013, Volume 31, Issue 17, Pages 3322-3333

Waste paper recycling is a process by which waste paper or waste cellulose fibers
are processed together with some chemical additions to produce another product such
as file cover, greeting card paper board and duplicating paper for goods.
A new efficient and simple method has been designed then applied in a present
work. Different types of waste papers are introduced as (writing paper WT, news paper
NT and magazine paper MT) during an experimental design apparatus stages of
collecting, separating, cutting, digesting / cooking, bleaching, lifting couching,
pressing and drying, finishing for final applications at operation conditions.
The finish products go to checking their characteristics properties, physical and
mechanical properties such as specific gravity, moisture content, brightness color,
porosity, stiffness, tensile strength, tensile breaking, elongation, and tearing resistance.
The result for these properties proved that all types give good mechanical properties
for application in another utilization use as saving pads for goods with optimum
application of newspaper samples.

Simple Treatment Of Textile Industry Wastewater For Reuse And Recycling

M. Sh. J. Al-Muhamadawi; M. A. Zablouk; Mahmood M. Barbooti

Engineering and Technology Journal, 2009, Volume 27, Issue 10, Pages 2072-2084

The aim of the present work is at describing a simple physico-chemical
treatment for the textile wastewater of a local plant to bring its characteristics to
that used within the plant. Lime and polyelectrolyte were employed individually to
aid the removal of pollutants. The effectiveness of the treatment was indicated by
measuring parameters like biochemical oxygen demand, BOD, turbidity, electrical
conductivity, EC, total suspended solids, TSS, total dissolved solid, TDS, for the
produced water after filtration through simple sand filter. The treatment was
supported by an extensive study of the coagulation/flocculation and filtration
processes. Color dyes adsorb efficiently onto the coagulant particles and separates
from the original liquor. Pollutants removal efficiency (Turbidity, TSS, TDS, and
color), by (87-90%, 81-85%, 30-32% 40-45%) respectively could be obtained by
using lime solution of concentration 35-40 mg/L without addition of cationic
polyelectrolyte. Increasing lime concentration results in some difficulties like high
pH value of water discharged, dewatering problems and sand filter clogging.