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.
Waste Managements general
The bio-gas produced from food waste, decomposable organic material and kitchen waste, consisting of methane and a little amount of carbon di oxide 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.
forced circulation evaporators
Aqua Enviro Care offers a complete range of Forced Circulation Evaporators with options of crystallization and additional accessories like elutriation legs, hydrocyclones , post product centrifuge / spray dryer for crystal separation / drying. Forced Circulation Evaporators are short tube evaporators and are ideally used when the boiling of feed liquid on the heating surfaces is to be avoided due to the salting and fouling characteristics of the liquid. Hence in these evaporators the flow velocity in the tubes is kept very high. In forced circulation evaporators the liquid is circulated at high velocities in the tubes of the heat exchanger while steam is provided in the chest. This liquid is partially evaporated when the pressure is reduced in the vapour-liquid separator to the corresponding boiling temperature. High volume , low head axial flow circulation pumps are used for recirculating the crystal laden slurry in the evaporator and hence the operation of this evaporator is independent of the temperature difference. In the crystallizing operation crystals can be separated from the crystallizing slurry by adjusting the velocity of the circulating stream
rising film evaporators
Aqua Enviro Care offers a complete range of Rising Film Evaporators of both short and long tube design In Rising Film Evaporator, due to the ascending force of the vapour bubbles, which are produced during boiling, the liquid and vapours flow upwards in a parallel flow. Simultaneously the vapour quantity also increase thereby forming a "Climbing" film on the walls of a tube. Due to this there is a high turbulence in the liquid and these evaporators are advantageous for heat sensitive, highly viscous and moderately scaling liquids. The temperature difference in the rising film evaporators should be high between the heating chest and boiling chamber to ensure the circulation and formation of a climbing film.
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.
Falling Film Evaporators
An evaporator is used to evaporate a volatile solvent, usually water, from a solution. Its purpose is to concentrate non volatile solutes such as organic compounds, inorganic salts, acids or bases. Typical solutes include phosphoric acid, caustic soda, sodium chloride sodium sulfate, gelatin. In many applications, evaporation results in the precipitation of solutes in the form of crystals, which are usually separated from the solution with cyclones, settlers, wash columns, elutriating legs, filters or centrifuges. Examples of precipitates are sodium chloride, sodium sulfate, sodium carbonate and calcium sulfate. The desired product can be concentrated solution, the precipitated solids, or both
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:
Sewage treatment plant
Aqua Enviro Care Sewage Treatment Plant is a contaminated water discharged from domestic, industrial, municipal and other sources. Sewage treatment plant is designed to remove the contaminants from the water so that they can be recycled and reused. Both organic and inorganic contaminants are removed by using different physical, chemical and biological processes. The treatment plant produces waste stream which is a treated effluent and a solid waste or sludge which are reused. Sewage is collected and transported via a network of pipes and pump stations to a municipal treatment plant. Normally three stages are involved for treating sewage- primary, secondary and tertiary. After being treated the effluent can be reused to flush toilets, greening parks, or for recharging ground water.
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.