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ECW 542

Water & Wastewater Engineering Lecturer:

Tower 1/ Aras / Room Ext. Offsite and Onsite Treatment DA/RH/ZMZ


Learning Outcome At the end of Week 3 students should be able to - describe onsite treatment - describe offsite treatment


ONSITE AND OFFSITE TREATMENT


DEFINITION • Individual System – connected directly to individual septic tanks. • Connected Services – collected and convey by sewer systems to a sewage treatment plant.


INDIVIDUAL SEPTIC TANKS (IST)


Primary Treatment Systems ď †Individual Septic Tanks


Typical Performance of Individual Septic Tanks

Effluent BOD : 150 - 200 SS : 50 - 180

Influent BOD : 200 - 400 mg/l SS : 200 - 350 mg/l


CONNECTED SERVICES


Connected Services


Connected Services


THANK YOU


ECW542-wk03-L07