Basically a management procedure in aquaculture farm

1. Presented MD Yeaminur Rahman
WASTEWATER TREATMENT
AND DISPOSAL IN
AQUACULTURE FARM

2. WASTE WATER

3. Wastewater Management and Water Treatment :
Before 2007:

4. After 2013:

5. Types of Waste in Aquafarm and Management:
• Metabolic waste and management:
Amount of feed
30% of feed become solid waste
Relation between feeding rate with temperature

6. • Chemical waste and
management:
-ultra violet radiation
-chlorination
-ozonation
• Pathogenic waste and
management:
-use of pesticide
-use of fertilizer
-industrial waste

7. • Feed management:
Prevent overfeeding
Unconsumed food turn into
toxic material
Appropriate feed
• Dissolve waste :
Fish feed decomposed
Uneaten feed
Nitrogen and phosphorus
product

8. Waste water treatment
 Physical
 Chemical
 Biological treatment

9. Physical unit operation:
Screening:
Removes objects such as rags, paper, plastic to prevent
damage and clogging of downstream equipment

10. Comminution:
Largest wastes are made smaller by cutting them into
smaller pieces .

11. Sedimentation :
Using gravity or chemical coagulants to remove suspended solids
from water.
• Plain sedimentation
• Sedimentation with coagalities

12.  Granual medium filtration :
A process for removing suspended or colloidal particles.

13.  Chemical Unit Operation:
Chemical Precipitation:
Chemical precipitation is used to remove ionic constituents from
water by the addition of counter-ions to reduce their solubility

14. Dechlorination :
Utilizing activated carbon or adding a reducing agent
can result dechlorination

15.  Biological Unit operation:
Activated sludge process
To treat industrial and sewage water using aeration and
a biological floc composed of bacteria or protozoa

16. Rotating biological contactors:
Wastewater is purified using microorganism membranes which
are attached to disks.

17.  Pond Stabilization:
Ponds designed and built for freshwater treatment to reduce the organic
content and remove pathogens from wastewater

18.  Anaerobic Digestion:
• Biological degradation of organic matter
• Absence of oxygen
• Chemical energy in organic carbon to biogas.

19. Biological Nutrient Removal:
Remove total nitrogen and total phosphorus from wastewater through
the use of microorganisms under different environmental condition .

20. Awareness in people:
Should not through waste in water
Careful about chemical use
Prohibit use of plastic

21. ?