19-07-2013, 03:08 PM
POTABLE WATER FROM INDUSTRIAL WASTEWATER
POTABLE WATER.pdf (Size: 205.21 KB / Downloads: 132)
Abstract:
The objective of the study was to treat the textile wastewater and convert it into potable grade water in the
laboratory scale. It involved a rigorous treatment procedure involving screening, coagulation, flocculation, aeration,
biological treatment, filtration and ion exchange. From the analysis of the treated water it can be said that the industrial
waste water can be converted into potable grade water.
INTRODUCTION
Textile is one of the major polluting industries
in Bangladesh and the effluent from the dyeing
and finishing section is a major source of water
pollution. Its effect is becoming more evident with
the increase in the number of textiles in the country.
The wastewaters which are characterized by
high alkalinity, high BOD and high suspended
solids are often disposed off to nearby rivers,
ponds or lakes without proper treatment. They
contaminate and decrease the amount of fresh water
in addition to causing serious damage to ecology
and aquatic lives. Therefore, under the
circumstances it will be helpful to think of ways to
treat
the textile wastewater so that it can be
reused.[1]
EXPERIMENTAL PROCEDURE
The experimental work thus can be divided into
three parts- analysis of the raw water, treatment of
the raw water and finally the analysis of the treated
water (Potable grade water)
For the qualitative analysis of raw wastewater,
the following parameters were measured in the
laboratory :- pH , Total Dissolved Solid (TDS ) ,
Total Suspended Solid ( TSS ) , Total Solid ( TS
) , Turbidity , Color, Dissolved Oxygen, Specific
Conductance, Biochemical Oxygen Demand (BOD)
, Chemical Oxygen Demand (COD ) and Different
metal ion concentration. All of these parameters
were measured using available standard methods.
The treatment involved a rigorous treatment
procedure involving screening, coagulation,
flocculation, aeration, biological treatment,
filtration and ion exchange. Process steps in the
laboratory scale treatment of wastewater are shown
in Figure 1
CONCLUSION
This study us a demonstration of effective
industrial waste water treatment. If applied
commercially, the industrial waste water can be
recycled as potable water to complete the reuse
cycle and zero discharge effluent from industry.