Advanced technologies in water and wastewater treatment



Introduction
Conventionalwater andwastewater treatment processes have
been long established in removing many chemical and microbial
contaminants of concern to public health and the environment.
However, the effectiveness of these processes has become
limited over the last two decades because of three new
challenges (Langlais et al. 1991; Mallevialle et al. 1996). First,
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PLASMA TECHNOLOGY
FOR
WASTE TREATMENT
ABSTRACT
In Nature there is no such thing as waste. If it were not for the waste oxygen that plants produce, we would not have oxygen to breathe Part of the plan for re-using material from living things is to have it decompose(treat) so that it can be assimilated by another life form. These ideas opened the doors for the evolution of a technique called Plasma technology.
Plasma technology is not a new technology but its application for waste treatment, electricity generatio ....etc

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With the increase in population, natural resources of water are being polluted. Ozone technology reveals one of the most efficient and effective method of achieving pollution removal in water. Ozone is the most powerful broad spectrum microbiological control or disinfecting agent available for water treatment. It is highly reactive and unstable. Considering chlorine which is the most commonly used water disinfectant chemical, O3 is 15% stronger oxidizer and kills bacteria 3000 times faster. The important advantage of O3 is that it produces no t ....etc

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INTRODUCTION
Water has always played a prominent role in human civilization. When people first began settling in one place and growing crops for sustenance, it was invariably near water sources like rivers, lakes or ground water springs. Water was needed for drinking, preparing food, bathing, cleaning, irrigating crops and a variety of other tasks, so it was important to have ready access to this resource. The water sources used for supplying water were not always clean and water was treated in one way or other to i ....etc

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PRESENTATION ON WATER TREATMENT
SOURCE OF WATER FOR DOMESTIC USE
• SURFACE WATER (TREATED)
• GROUND WATER
• USEAGE: For Drinking, For Kitchen and other household purposes
MAJOR IMPURITIES OF WATER
• Ionic and dissolved.
• Nonionic and Undissolved or suspended Impurities.
• Gaseous
Relation between pH and alkalinity & CO2
TREATMENT PROCESSES MAJORLY USED
REDUCTION OF TDS
Process Driving force
• Ion Exchange (IX) Chemical
• Reverse Osmosis (RO) Pressure
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