Effluent treatment plant is used for treating waste water coming from different manufacturing industries. Manufacturing industries use different types of chemicals or dyes for treating materials. After treatment, waste water is discharge to the environment directly having caused pollution to environment. To reduce pollution caused by waste water, effluent treatment plant is widely utilized.
In textile industry, various types of dyes and chemicals are widely used for weaving knitted fabrics, dyeing knitted fabrics and garments wasting plant. Waste water is treated in effluent treatment plant. Waste water is discharged from souring, bleaching, washing and dyeing during dyeing process.
Nowadays, a lot of dyeing and textile plants have already established for processing textile products. The following are the characteristics of waste water which is allowed to be discharge to environment directly after treatment.
PH=6-9
BOD = 50 mg/L
COD= 200 mg/L
Suspended solid = 150 mg/L
Color = Light brownish
The followings are characteristics of waste water produced in dyeing industry.
PH=9-11
BOD=300 mg/l
COD=200 mg/l
SS=200 mg/l
Characteristics of waste water after treatment
PH=7-8
BOD=30 mg/l
COD=160 mg/l
Suspended solid=30mg/l
Color=Light brownish
Process of waste water treatment:
Effluent comes in collection tank
↓
Equalization tank (Cooling & Mixing)
↓
Primary clarifier tank (Neutralization)
↓
Aeration tank
↓
Secondary clarifier (Tank 1 & 2)
↓
Sludge returns to aeration tank
↓
Thickness filter
↓
Fish pond
↓
Outlet
Post: Introduction of Effluent Treatment for Textile Industry
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