Lecturer:

Tower 1/ Aras / Room

Ext.

Offsite and Onsite Treatment

Water & WastewaterEngineering

ECW 542

DA/RH/ZMZ

Learning Outcome

At the end of Week 3 students should be able to

- describe onsite treatment

- describe offsite treatment

ONSITE AND OFFSITETREATMENT

DEFINITION

• Individual System – connected directly toindividual septic tanks.

• Connected Services – collected and conveyby sewer systems to a sewage treatmentplant.

INDIVIDUAL SEPTICTANKS (IST)

Primary Treatment SystemsPrimary Treatment Systems

Individual Septic Tanks

Typical Performance of IndividualTypical Performance of IndividualSeptic TanksSeptic Tanks

InfluentBOD : 200 - 400 mg/lSS : 200 - 350 mg/l

EffluentBOD : 150 - 200

SS : 50 - 180

CONNECTED SERVICES

Connected ServicesConnected Services

Connected ServicesConnected Services

THANK YOU