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Waste Managements general


Waste management is the collection, transport, processing or disposal, managing and monitoring of waste materials. The term usually relates to materials produced by human activity, 
and the process is generally undertaken to reduce their effect on health, the environment or aesthetics. Waste management is a distinct practice from resource recovery which focuses on delaying the rate of consumption of natural resources. All waste materials, whether they are solid, liquid, gaseous or radioactive fall within the remit of waste management.

Forced circulation evaporators

In these type of evaporators some mechanical device are fitted to circulate the contents heating in it. For example an evaporating pan in which the materials is agitated by a stirring rod or by a mechanical propeller.The liquid is circulated by means of a pump and as it is under pressure in the tubes the boiling point is raised and no boling take places. And it enters the body of the evaporator.
Forced circulation evaporators Forced circulation evaporators
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Rising film evaporators

A rising film or vertical long tube evaporator is a type of evaporator that is essentially a vertical shell and tube heat exchanger. The liquid being evaporated is fed from the bottom into long tubes and heated with steam condensing on the outside of the tube from the shell side. This is to produces steam and vapour within the tube bringing the liquid inside to a boil. The vapour produced then presses the liquid against the walls of the tubes and causes the ascending force of this liquid. As more vapour is formed, the centre of the tube will have a higher velocity which forces the remaining liquid against the tube wall forming a thin film which moves upwards. This phenomenon of the rising film gives the evaporator its name.
Rising film evaporators Rising film evaporators

Multiple effect evaporators

Multiple effect evaporator utilizes the heat from the steam and uses it for evaporation. Sequence of vessel is used in a multiple-effect evaporator. The pressure in the vessel is lower than the preceding vessel. As the pressure decreases the boiling point of water also decreases hence the vapor boiled off in one vessel can be used to heat the next. In multi effect evaporator, only the first vessel is heated by an external source of energy.  These evaporators can be constructed in any number of stages, but in practice four stages evaporators are generally used. Multiple effect evaporator or multi effect evaporator is used a multi-effect evaporation (MEE) distillation process. The process was developed in late fifties and since then it has seen many phases of developments. Though scaling is one of the problem that is attached with it but owing to better thermal performance it is still preferred. In this system, in every stage vapor is condensed thereby giving up its heat to drive more evaporation for the next stage. For improving the performance each stage is operated at a successively lower pressure. 
Multiple effect evaporators Multiple effect evaporators
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Falling Film Evaporators

A falling film evaporator is an industrial device to concentrate solutions, especially with heat sensitive components. The evaporator is a special type of heat exchanger.
Falling Film Evaporators Falling Film Evaporators

Effluent treatment plant

Effluent is any substance that create pollution, such as municipal sewage or industrial liquid waste that flows out of a treatment plant, septic system, pipe, etc. Effluent can be the outflow from a sewage treatment facility or the wastewater discharge from industrial facilities. Effluents are being produced in large amounts from a number of industries, and it is posing a serious threat to our environment. Handling of such type of effluents is quite necessary to prevent our environment from being further threatened by such dangers The effluent treatment plant may follow any of these processes available today, such as conventional method, modern technology. Here we will concentrate on the conventional method used for the effluent treatment plant. The conventional method consists of three main stages, which includes:
Effluent treatment plant Effluent treatment plant

Sewage treatment plant

Sewage treatment is the process of removing contaminants from wastewater, primarily from household sewage. It includes physical, chemical, and biological processes to remove these contaminants and produce environmentally safe treated wastewater (or treated effluent). A by-product of sewage treatment is usually a semi-solid waste or slurry, called sewage sludge, that has to undergo further treatment before being suitable for disposal or land application.Sewage treatment may also be referred to as wastewater treatment, although the latter is a broader term which can also be applied to purely industrial wastewater. For most cities, the sewer system will also carry a proportion of industrial effluent to the sewage treatment plant which has usually received pretreatment at the factories themselves to reduce the pollutant load. If the sewer system is a combined sewer then it will also carry urban runoff (stormwater) to the sewage treatment plant.
Sewage treatment plant Sewage treatment plant
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Air Pollution Control System

Air Pollution Control System Air scrubbers are commonly used in process-air applications to eliminate potentially harmful dust and pollutants. A liquid, in general water added with active chemicals adapted to the process, is sprayed in to the air flow. Aerosol and gaseous pollutants in the air stream are removed by either absorption or chemical reactions with the water solution. 
 Air Pollution Control System  Air Pollution Control System

Biogas Plant

The bio-gas produced from food waste, decomposable organic material and kitchen waste, consisting of methane and a little amount of carbon dioxide is an alternative fuel for cooking gas (LPG). Also, the waste materials can be disposed off efficiently without any odor or flies and the digested slurry from the bio-gas unit can be used as an organic manure in the garden
Biogas Plant Biogas Plant
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