treatment of waste water in industrial grade processes for reutilising in day day to life

1. DOMESTIC WASTE WATER
TREATMENT

2. 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

3. WHAT IS WASTEWATER
 IT IS ANY WATER THAT HAS BEEN ADVERSELY AFFECTED IN QUALITY BY
ANTHROPOGENIC INFLUENCE .

4. 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.)

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

6.  GREY WATER
 IT CONSISTS WASTEWATER GENERATED FROM PLATES AND WASH-HAND
BASINS, SHOWERS AND BATHS.

7. SOURCES OF DOMESTIC
WASTEWATER
toilet flushing 40%
Bathing 30%
Laundry 15%
Kitchen 10%
Others 5%

8. 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.

9. PROCESS OF WASTEWATER
TREATMENT
 PRELIMINARY TREATMENT
 PRIMARY TREATMENT
 SECONDARY TREATMENT
 TERTIARY TREATMENT

10. 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.

11. PRIMARY TREATMENT
 SEDEMENTATION
 COAGULATION
 FLOCCULATION

12. SECONDARY TREATMENT
 AERATION
 FILTRATION
 SECONDARY SEDIMENTATION

13. 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.

15. 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.