Envirotech Engineering Ltd is a waste engineering solutions provider
We have waste treatment solutions and handling systems for municipalities and private operators
We do waste treatment technology consultancy work and can offer you a feasible solution, an advanced well designed solution for your solid and waste problems. We are associated with well known operators and we have expertise in the following categories:
First we can offer a well proven technology solution in municipal and Industrial waste incineration, which besides answering to all modern legislation, produces electricity for the national grid of your country. We operate worldwide.
We build state-of-the-art plants together with well-known and like-minded partners. We also retrofit installations to comply with the most stringent regulations and customer requirements.
Secondly we can offer suitable fixed and portable solutions for contaminated soil and other varied waste which exist around and which have to be handled properly. We operate worldwide as well.
Our multi-stage grate is ideally suited for use in installations for thermal treatment of various kinds of municipal and industrial waste or biomass. Our multi-stage grate is the only grate combustion system which incorporates separate and independently controlled actuators for waste or biomass transport and waste or biomass mixing.
We offer a suite of technologies that maximize the value of waste streams and minimize the environmental impact, preserving the land and the air we breathe. Whether it involves mechanical waste pre-treatment or valorization of waste in a energy-from-Waste plant.
waste-to-energy plant is a waste management facility which combusts wastes to produce electricity. This type of power plant is sometimes called a trash-to-energy, energy recovery or resource recovery plant. Most waste-to-energy plants burn municipal solid waste, but some burn industrial waste. Landfill gas and digester gas power plants are sometimes included in this category, but are usually considered separately.
Modern waste-to-energy plants should not be confused with the trash incinerators that were commonly used until a few decades ago. Those plants usually did not remove hazardous or recyclable materials before burning. In fact, the process used was not that much different from burning trash in a pit or barrel. The old incinerators endangered the health of the plant workers and the nearby residents. Also, most of these incinerators did not generate electricity.
Waste-to-energy plants share much of their design and equipment with other steam-electric power plants, particularly biomass plants. First, waste is brought to the facility. Then, the waste is sorted to remove recyclable and hazardous materials. The waste is then stored until it is time for burning. The waste can be added to the boiler continuously or in batches, depending on the design of the plant. Modern waste-to-energy plants are designed to reduce the formation of new pollutants in the furnace, such as NOx, SOx and particulates, and to destroy pollutants already present in the trash. Pollution control measures, such as bag houses, scrubbers and electrostatic precipitators capture most of the pollution not destroyed by combustion. Odor pollution can be a problem when the plant location is not isolated. Some plants store the waste in an enclosed area with a negative pressure, which prevents unpleasant odors from escaping, and the air drawn from the storage area is sent through the boiler or a filter. Unfortunately, not all plants are operated in the best possible manner and the concerns and complaints of nearby residents are often legitimate.
A modern, properly run waste-to-energy plant sorts material before burning it and can co-exist with recycling. In fact, recycling rates are typically higher in areas that have waste-to-energy plants. Items that are not recyclable, by design or economically, and are not hazardous can be sent to the plant for burning. In addition, the plants allow the previously un-recyclable metals integrated into products to be captured. The metals are collected from the bottom of the furnace and sold to foundries.
There is always some level of pollution generated at power plants. Waste-to-energy plants emit more pollution than natural gas plants, but less than coal plants, which produce half of the electricity in the United States. A few plants use gasification, which is thought to be less polluting, perhaps incorrectly, but most combust the waste directly because it is a mature, efficient technology. Waste-to-energy plants also reduce the volume of waste by 80 to 90%. Sometimes the ash is clean enough to be used for some purposes, but otherwise it is land filled. However, depending on the design of the plant, how it is operated and the type of waste being burned, the plant may produce significantly more pollution and the ash and other wastes may be highly toxic.
Burning waste does produce dioxin, as do coal and natural gas plants. How much dioxin is greatly debated. Advances in design and new regulations have caused large reductions in the amount of pollution produced by waste-to-energy plants, particularly dioxin. However, it produces more dioxin than other fuels, such as natural gas. Also, solar, wind and hydroelectric power do not produce dioxin at all. Others believe that the amount of pollution produced is offset by the landfill space saved, metal captured, pollutants destroyed in the furnace and the electricity produced, which might have otherwise been produced at a coal plant, which generally produces much more pollution than a waste-to-energy plant. Waste-to-energy plants also replace the burning of landfill gas. Landfill gas contains about 50% methane, 50% carbon dioxide, is contaminated with a small amount of pollutants. Unlike at waste-to-energy plants, there are little or no pollution controls on the burning of landfill gas, which is usually flared or used to run a reciprocating engine or micro turbine. Cleaning up the landfill gas is usually not cost effective because natural gas, which it substitutes for, is relatively cheap. However, it might be a better solution to regulate the burning of landfill gas than to use waste-to-energy plants.
Working with a world leader in providing advanced treatment technology for bio solids, we are able to address the major problems of sewage, ground and surface water. We offer total solutions for sludge originating from various sources including: Municipal and industrial sewage sludge / Manure / Slurry from the pulp and paper industry / Slaughter waste and meat industry
Bio-solids= organic residue slurry containing typically more than 50% of water. By enhancing the quality of bio solids to allow for beneficial re-use or by reducing and inertizing the volume of bio solids for a safe and economical final disposal, our unique approach ensures a sustainable solution to our customers' problems.
For instance, the hard pelletizer transforms pathogenic sludge into a valuable organic fertilizer or a green fuel. Another example is the maximal volume reduction and inertization of slurry through the ZERO FUEL fluidized bed combustor. We will provide interested parties with proven thermal treatment processes, key process equipment, engineering services, operation and maintenance support, technological tests and demonstration campaigns.
Our incinerators can decontaminate large quantities of material. They are available in both portable and stationary models. And they can handle pesticides, paint, solvents, creosote, coal tar and hospital lab waste, and oil contaminated soil.
The contaminants are burned out of the material using very high temperatures. The resulting gases are diverted from the drum through a vertical afterburner. The decontaminated material is safe to use as an ingredient in construction materials, including hot mix asphalt.
