DOMESTIC WASTE WATER TREATMENT

CONTENTS WHAT IS WASTE WATER ? TYPES OF WASTE WATER ? SOURCES OF DOMESTIC WASTE WATER OBJECTIVES TO TREAT WASTE WATER PROCESS OF WASTE WATER TREATMENT WATER TREATMENT FOR 30 FAMILY RESIDENTIAL BUILDING CONCLUSION

WHAT IS WASTEWATER

IT IS ANY WATER THAT HAS BEEN ADVERSELY AFFECTED IN QUALITY BY ANTHROPOGENIC INFLUENCE .

TYPES OF WASTEWATER

DOMESTIC WASTEWATER FROM HOUSE HOLD TREATED WATER (BATH,FLOOR

WASHING,DISH WASH)

INDUSTRIAL WASTEWATER FROM MANUFRACTURING PROCESS FROM INDUSTRIES (SOFT DRINK , BEER COMPANY , METAL PROCESSING , CHEMICAL IND.)

DOMESTIC WASTEWATER BLACK WATER IT IS THE WASTE WATER CONTAING FECAL MATTER AND URINE.

GREY WATER IT CONSISTS WASTEWATER GENERATED FROM PLATES AND WASH-

HAND BASINS, SHOWERS AND BATHS.

SOURCES OF DOMESTIC WASTEWATER

toilet flushing 40%Bathing 30%Laundry 15%Kitchen 10%Others 5%

OBJECTIVES TO TREAT WASTEWATER

TO REMOVE POLLUTANTS FROM WASTE WATER FOR ITS RECYCLING. TO PROMOTE HEALTH CONCERN AND PUBLIC HYGIENE. TO PRESERVE AQUATIC LIFE AND WILDLIFE HABITAT. REDUCE THE QUANTITY OF WASTE WATER ADDING TO WATER SOURCE.

PROCESS OF WASTEWATER TREATMENT

PRELIMINARY TREATMENT PRIMARY TREATMENT SECONDARY TREATMENT TERTIARY TREATMENT

PRELIMINARY TREATMENT

Remove or to reduce in size the large, entrained, suspended or floating solids. These solids consist of pieces of wood, cloth, paper, plastics, garbage, etc. together with some fecal matter.

Remove heavy inorganic solids such as sand and gravel as well as metal or glass. These objects are called grit.

PRIMARY TREATMENT

SEDEMENTATION COAGULATION FLOCCULATION

SECONDARY TREATMENT

AERATION FILTRATION SECONDARY SEDIMENTATION

TERTIARY TREATMENT

DISINFECTION ; WATER DISINFECTION MEANS THE REMOVAL,

DEACTIVATION OR KILLING OF PATHOGENIC MICROORGANISMS. ODOUR BALANCE ; GENERALLY ARISES DUE TO HYDROGEN SULFIDE. CONTROLLED BY ADDING IRON SALTS OR HYDROGEN PEROXIDE OR CALCIUM NITRATE.

CONCLUSION

WATER IS INDEED THE MOST PRECIOUS COMMODITY FOR OUR DAILY

DAY LIVING. LIFE WITHOUT IT IS ALMOST IMPOSSIBLE. BUT IMPURE

AND POLLUTED WATER MAY BECOME THE CAUSE OF MANY DEADLY

DISEASES OR EVEN DEATH AND IT MAY AFFECT THE ENVIRONMENT

TOO. THAT IS THE REASON WHY THE RAW WATER MAY BE AT

GROUND OR SURFACE NEED TO BE TREATED 1ST BEFORE REACHING

TO THE CONSUMER. THAT’S WHY WATER TREATMENT PLANT HAS

BEEN INSTALLED.