waste water treatment by bikash
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Transcript of waste water treatment by bikash
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.