Fertilizer industry waste water treatment

Fertilizer industry waste water treatment


Sources:
Spill overs from manufactured of acids used as raw materials, spill over of the final fertilizer products, boiler blow down, cooling waters etc.


Properties

i. Effluent from ammonia production is highly alkaline.
ii. Effluent from phosphoric acid manufacturer is acidic.
iii. High amount of fluoride present in the phophatic fertilizer.


Bad Effects
i. Fertilizer effluents cause eutrophication due to algal bloom.
ii. Enrich the fluoride content of receiving waters causing dental skeletal fluorosis to human.
iii. Presence of Cr, CN-, NH3 are harmful to aquatic life.
iv. Abnormal calcification of bones in animals.

How to Treatment those
a) Segregation of wastes.
b) Removal of urea by hydrolysis.
c) Removal of fluoride and phosphate by precipating with chalk.
d) Removal of oil and greases by mechanical oil separation.