In Malaysia, approximately 70 million tones of organic wastes are generated annually as municipal solid wastes, agricultural residues, animal wastes, sewage sludge from wastewater treatment plant and wood chips.
Most of these wastes are either incinerated or dumped in landfill. The latter requires precious open lands, while the former contributes to serious atmospheric pollution. Both of which have serious impact on the environment. The country, therefore, needs to adopt a more practical, economic and acceptable approach in managing and disposing the organic wastes.
The thing about organic wastes is that they harbour abundance volatile matter which can be converted to fuel through suitable treatment, such as pyrolysis. This possible method is receiving increasing attention as an economic and environmentally acceptable route to waste disposal due to its ability to produce fuel gases and oil.
The latest development in the pyrolysis technology is the application of heat by using microwave energy. Microwave treatment might serve as an alternative method for drying, pyrolysing and gasifying the organic wastes in one single step. The research in this method, however, has not been extensive. Published information on microwave pyrolysis design and process condition is also lacking.
A research group at the Department of Chemistry, University Malaysia Sarawak, has designed a laboratory scale microwave pyrolysis system through modification of laboratory microwave oven. The aim is to conduct chemical characterisation of the waste samples and their microwave pyrolysis products, and to optimise the microwave pyrolysis processes for optimum biofuel yield which is environmentally acceptable. The main focus is to develop an efficient, simple and low-temperature based process for converting organic wastes into useful renewable energy sources.
Preliminary studies on low-temperature microwave pyrolysis of sewage sludge suggest a fuel material potential, comparable to the lower grade coal.It is hoped that data gathered in this study will provide useful information on the microwave pyrolysis of organic wastes and the potential use of the process as an alternative for the reutilisation of wastes, which at the same time produce renewable energy sources for industries in Malaysia.
ABOUT UNIVERSITI MALAYSIA SARAWAK (UNIMAS)
UNIMAS was established in 1992. The University's mission is to generate, disseminate and apply knowledge strategically and innovatively to enhance the quality of the nation’s culture and prosperity of its people. The knowledge creation initiatives at UNIMAS are premised partly upon the wealth of natural resources and diverse socio-cultural make up of the State of Sarawak. UNIMAS commitment to research has already been recognized by the stakeholders and partners in industry through provision of endowments for the establishment of eight research chairs; these include the Tun Zaidi Chair for Medicinal Chemistry, the Tun Openg Chair for Sago Technology, the Shell Chair for Environmental Studies, and the Sapura Chair for ICT.
Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel
Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)
Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...
Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.
The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...
Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.
Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...
In the fight against cancer, scientists are developing new drugs to hit tumor cells at so far unused weak points. Such a “sore spot” is the protein complex...
In an article that appears in the journal “Review of Modern Physics”, researchers at the Laboratory for Attosecond Physics (LAP) assess the current state of the field of ultrafast physics and consider its implications for future technologies.
Physicists can now control light in both time and space with hitherto unimagined precision. This is particularly true for the ability to generate ultrashort...
13.04.2018 | Event News
12.04.2018 | Event News
09.04.2018 | Event News
19.04.2018 | Materials Sciences
19.04.2018 | Physics and Astronomy
19.04.2018 | Physics and Astronomy