Category Archives: Waste Management

Analysis of a Composting Facility

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The composting process is a complex interaction between the waste and the microorganisms within the waste. The microorganisms that carry out this process fall into three groups: bacteria, fungi, and actinomycetes. Actinomycetes are a form of fungi-like bacteria that break down organic matter. The first stage of the biological activity is the consumption of easily available sugars by bacteria, which causes a fast rise in temperature. The second stage involves bacteria and actinomycetes that cause cellulose breakdown. The last stage is concerned with the breakdown of the tougher lignins by fungi. The composting process occurs when biodegradable waste is piled together … Continue reading →

Waste-to-Energy Pathways

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Waste-to-energy is the use of modern combustion and biological technologies to recover energy from urban wastes. The conversion of waste material to energy can proceed along three major pathways – thermochemical, biochemical and physicochemical. Thermochemical conversion, characterized by higher temperature and conversion rates, is best suited for lower moisture feedstock and is generally less selective for products. On the other hand, biochemical technologies are more suitable for wet wastes which are rich in organic matter. 1. Thermochemical Conversion of Waste The three principal methods of thermochemical conversion of MSW are combustion (in excess air), gasification (in reduced air), and pyrolysis (in … Continue reading →

The Popular Methods for Aluminium Recycling

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The demand for aluminium products is growing steadily because of their positive contribution to modern living. Aluminium is the second most widely used metal whereas the aluminum can is the most recycled consumer product in the world. Aluminium finds extensive use in air, road and sea transport, food and medicine, packaging, construction, electronics and electrical power transmission. The excellent recyclability of aluminium, together with its high scrap value and low energy needs during recycling make aluminium highly desirable to one and all. The global aluminium demand is forecasted to soar to nearly 70 million tons by 2020 from around 37 … Continue reading →

Animal Waste Management in Africa: Perspectives

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Livestock and poultry production are among the main economic activities in rural as well as urban areas of African countries. The livestock sector, in particular sheep, goats and camels, plays an important role in the national economy of African countries. In addition, the region has witnessed very rapid growth in the poultry sector. The livestock industry and poultry industry, however, are contributing heavily to greenhouse gas emissions and waste crisis in Africa due to the absence of a sustainable animal waste management system. Most of the manure is collected in lagoons or left to decompose in the open which presents … Continue reading →

Fuel Pellets from Solid Wastes

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Municipal solid waste is a poor-quality fuel and its pre-processing is necessary to convert it into fuel pellets to improve its consistency, storage properties, handling characteristics, combustion behaviour and calorific value. Technological improvements are taking place in the realms of advanced source separation of MSW, resource recovery and production of MSW fuel pellets in both existing and new plants for this purpose. There has been an increase in global interest in the preparation of MSW fuel pellets or Refuse Derived Fuel (or RDF) so let us take a close look at this interesting alternative fuel. Pelletization of Muncipal Solid Waste … Continue reading →

Recycling of PET Plastic Bottles

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Like all other modern urban centers, the Middle East also faces challenges in environmental protection due to tremendous tonnage of plastic waste produced in different forms. The gross urban waste generation from Middle East countries exceeds 150 million tons per annum, out of which 10-15 percent is contributed by plastic wastes. The burgeoning population, growing consumption, and an increasing trend towards a “disposable” culture, is causing nightmares to municipal authorities across the region and beyond. Plastic consumption has grown at a tremendous rate over the past two decades as plastics now play an important role in all aspects of modern … Continue reading →

The Significance of E-Waste Management

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E-waste is the fastest growing waste stream, and its disposal is a major environmental concern in all parts of the world. More than 50 million tons of e-waste is generated every year with major fraction finding its way to landfills and dumpsites. E-waste comprises as much as 8% of the municipal solid waste stream in rich nations, such as those in GCC. Globally only 15 – 20 percent of e-waste is recycled while the rest is dumped into developing countries. However, in the Middle East, merely 5 percent of e-waste is sent to recycling facilities (which are located in Asia, … Continue reading →

Solid Waste Management in the Middle East – Major Challenges

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Middle East is one of the most prolific waste generating regions of the world. Solid waste management in the Middle East is bogged down by major challenges like lavish lifestyles, ineffective legislation, infrastructural roadblocks, indifferent public attitude and lack of environmental awareness. High standards of living are contributing to more generation of waste which when coupled with lack of waste collection and disposal facilities have transformed ‘trash’ into a liability. Major Hurdles The general perception towards waste is that of indifference and apathy. Waste is treated as ‘waste’ rather than as a ‘resource’. There is an urgent need to increase … Continue reading →

Waste-to-Energy Outlook for the Middle East

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High-income Middle Eastern countries like Saudi Arabia, UAE, Qatar, Bahrain and Kuwait are counted as world’s largest waste producers in terms of per capita waste generation which is more than 2kg per day in some countries. The urban waste generation from the region has now crossed 150 million tons per year which has forced policy-makers and urban planners to seriously look for sustainable waste management solutions, including recycling and waste-to-energy. Let us take a look at solid waste generation in major countries across the Middle East region: Country MSW Generation (million tons per annum) Saudi Arabia 15 United Arab Emirates … Continue reading →

A Quick Glance at Composting Methods

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The composting process is a complex interaction between the waste and the microorganisms within the waste. The microorganisms that carry out this process fall into three groups: bacteria, fungi, and actinomycetes. Actinomycetes are a form of fungi-like bacteria that break down organic matter. The first stage of the biological activity is the consumption of easily available sugars by bacteria, which causes a fast rise in temperature. The second stage involves bacteria and actinomycetes that cause cellulose breakdown. The last stage is concerned with the breakdown of the tougher lignin by fungi. Types of Composting There are 3 broad types of composting methods—anaerobic composting, aerobic composting, … Continue reading →

مشكلة رمي النفايات في الأردن

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في الماضي القريب، كانت عمان تعتبر واحدة من أنظف المدن في العالم,  حالياً، وكما هو الحال في البلدان الأخرى، يشكل رمي النفايات على الأرض في المناطق العامة مشكلة بيئية متزايدة في الأردن, والتي بدورها تشوه المظهر العام للبلاد كما أن لها آثاراً خطيرة على البيئة والإقتصاد والصحة العامة. “القمامة غير المرئية“ تعتبر ظاهرة الرمي العشوائي للنفايات كارثة وطنية، حيث تنتشر النفايات المختلفة مثل العلب المعدنية والأكياس البلاستيكية وأعقاب السجائر والمحارم وأغلفة الطعام والإطارات القديمة على جوانب الطرق. لتسليط الضوء على المشكلة, قامت كاتبة المقال بدراسة ماسحة في عام 2011، حيث كشفت الدراسة عن المفاهيم الخاطئة لدى العامة لمفهوم “النظافة” في … Continue reading →

الاثار الضاره لرمي النفايات

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يعد رمي  النفايات خطر شائع يمكن للمرء ان يشهده في جميع المناطق الحضريه, حيث الشوارع و الارصفه و مواقف السيارات و الطرق السريعه اغلبها مغطاه باغلفه المواد الغذائيه و زجاجات المياه و المشروبات الغازيه و الاكياس البلاستيكيه و النشرات الدعائيه و اعقاب السجائر بالاضافه الى المناديل الصحيه و الاوراق و غيرها. 1.9 بليون طن ما يقدر سنويا من النفايات ينتهي بها المطاف في المحيطات , مما يدل بشكل واضح على ان الناس يميلون الى رمي الاشياء عشوائيا في اي مكان على القيام  برميها في صناديق القمامه. لايعد رمي هذه  القمامه مشكله جماليه فحسب و انما  مشكله بيئيه لها عواقب وخيمه … Continue reading →