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Industrial Waste.

Types of industrial waste required as materials for industrial use include:

• Waste wood
• Waste thermoplastics; but not including thermoplastic medical waste
• Waste paper
• Waste steel (including stainless steel)

What Are the Benefits of Wastewater Treatment?

1. saving of extra water,
2.recycling of water,
3.ground water,surface water source is safe from pollution due to treatment of waste water.
4.treated water is used for vegetation.
5.cost of transportation of polluted water is saved.
6.Air pollution is limited to treatment plant.

Characteristics of wastewaters

Municipal wastewater is mainly comprised of water (99.9%) together with relatively small concentrations of suspended and dissolved organic and inorganic solids. Among the organic substances present in sewage are carbohydrates, lignin, fats, soaps, synthetic detergents, proteins and their decomposition products, as well as various natural and synthetic organic chemicals from the process industries. Table 1 shows the levels of the major constituents of strong, medium and weak domestic wastewaters. In arid and semi-arid countries, water use is often fairly low and sewage tends to be very strong,  where water consumption is 90 l/d per person. 

Classification of ETP

 1 High-grade treatment

 1.1 Chemical

 1.2 Biological

 1.3 Chemical-biological

 2 Mechanical treatment

 3 Other treatment

 4 Direct discharges

Wastewater Treatment

Introduction 

Wastewater treatment refers to the process of removing pollutants from water previously employed for industrial, agricultural, or municipal uses. The techniques used to remove the pollutants present in wastewater can be broken into biological, chemical, physical and energetic. These different techniques are applied through the many stages of wastewater treatment.