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Saturday, July 14, 2007

municipal solid waste--waste to energy

 
Alka's is the world's first continuous process for all manner of waste plastics"

Pie on the table:

We are not talking of a pie in the sky idea that is still in the laboratory. Alka and her husband Umesh, are buying in 5 tonnes of plastic waste everyday in Nagpur,India at prices attractive to rag pickers. They are wringing fuel oil out of that unsightly pile and selling it to industries. Production from their plant, Unique Plastic Waste Management & Research Co Pvt Ltd is sold out for the next year.

In the produce, approximately 70% is liquid hydrocarbon, 15% is gas and 5% is solid coke. Balance is ash and metal fines.

Her work is breathtaking good news for this planet's environment.

http://www.goodnewsindia.com/index.php/Magazine/story/alkaZ
 
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Bio- petroleum from sewage sludge
BioPetrol is developing a commercially viable global solution for turning sewage sludge into oil, saving enormous sums in disposal and saving the earth from the destructive sewage dumping which is ruining the environment.

The substantial increase in the amount of sewage sludge worldwide has become a major environmental concern. The treatment and disposal of sewage sludge is a never-ending problem for cities around the world which requires innovative new solutions. Because the disposal of sludge consumes more than 30% of the budget of wastewater treatment plants, sludge handling equipment is of vital interest to plant operators.
The technological processes involved in the Bio-Petrol generation belong to the sphere of liquefying carbon-rich solid fuels. The liquefaction processes common today comprise two stages:

1. Thermal breakdown of the molecular structure to create radical fractions different in size.

2. Stabilization of the radicals by recombining themselves or by redistribution of hydrogen from the raw material itself or by hydrogen that is introduced from outside (molecular hydrogen or from hydrogen-donor matter).

Measures to be implemented to resolve the problem of sewage sludge that contain a high degree of organic matter could primarily aim at recycling it through a thermo chemical pyrolysis process in order to recover hydrocarbons that make up the structure of sewage sludge. Pyrolysis of sewage sludge produces oil, gas and char products. The pyrolysis oils have also been shown to contain valuable chemicals in significant concentrations and hence may have the potential to be used as chemical feedstock.
The process of low temperature thermochemical conversion of municipal sewage sludge to oil is a new technology in developed countries. The amount of investment is still less than the amount invested in the sewage sludge incineration process, and the operational economy of the process is obviously superior to incineration.
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Pyrolysis and gasification, like incineration, are options for recovering value from sewage sludge by thermal treatment. Both pyrolysis and gasification turn sewage sludge into energy-rich fuels by heating the sludge under controlled conditions. Whereas incineration fully converts the input sewage sludge into energy and ash, these processes deliberately limit the conversion so that combustion does not take place directly. Instead, they convert the sewage sludge into valuable intermediates that can be further processed for materials recycling or energy recovery.

Pyrolysis and gasification offer more scope for recovering products from sewage sludge than incineration. When sludge is burnt in a modern incineration the only practical product is energy, whereas the gases, oils and solid char from pyrolysis and gasification can not only be used as fuel, but also purified and used as a feedstock for petrochemicals and other applications. Obviously, there is a growing demand for sludge management technologies capable of: 1). Meeting increasingly stringent regulatory requirements. 2.) Effectively utilizing potential for material and/or energy recovery.
More over it will help to reduce the stream and river pollution that is caused by disposing off sludge. This technology of preparing biopetroleum will also lead to a revolution in petroleum industry an will also help in protecting environment.

The technology, improved by BioPetrol Ltd. (patent pending) is capable of processing carbon wastes, other than sewage sludge, including agri-wastes, bagasse, pulp and paper residues, tannery sludge and other end-of-life products such as plastics, tires and the organics in municipal solid waste.

1 comment:

Vincent2012 said...

Indigenous oil refining incomplete combustion toxic gases and precipitation of diesel caused serious environmental pollution, refinery perimeter soil, surface and groundwater has been severely damaged.

Continuous Feed Pyrolysis Plants