Common effluent treatment methods
Summary :
Table of Contents
- Introduction
- Definition of pollution
- The literature review
- The waste water treatement
- The theory of gaseous effluent treatment
- Advantages
- Disadvantages
- Conclusion
- References
Abstract
Pollution may be defined as any condition in which certain substances are present in such concentrations that they can produce undesirable effects or changes in physical, chemical, biological, radiological properties of air, water, soil. Such substances are called pollutants. The primary air pollutants are those that are emitted directly from the source, which include particulate matter like ash, smoke, dust, fumes, mist, spray and inorg. Gases like SO2, H2S, NO, NH3, CO, HF and olefins, aromatic hydrocarbons, radioactive compound. The secondary air pollutants are those that are formed by the interactions of primary pollutants and normal atm. constituents. These include SO3, NO2, PAN, ozone, aldehydes, ketones, sulphates and nitrate salts. The problem of water pollution due to discharge of domestic and industrial wastes into aquatic systems has already become a serious problem in the country. The water pollutants are classified into oxygen demanding wastes, disease causing agents, synthetic org. compounds, plant nutrients, inorg. chemicals & minerals, sediments, radioactive substances, thermal discharges, oils.
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