A Presentation On
By: Vipul Chavda Cleantech Water 20,4th Floor, Ratna Business Square Opp. H.K.College, Ashram Road, Ahmedabad.
• Contents
• • • •
Waste Water Pollutants / Impact Type of Treatment for STP Typical STP for Residential Complex Three rules for Better STP • Proper Design • Proper Engineering • Proper Operation & Maintenance
• Waste Water Pollutants • Why Waste Water Treatment ?? • • • • •
Compliance with Law Resource Recovery – Water is Precious Improved Surface / Ground Water Quality Improved Public Health Long-term Sustainability
• Pollutants in Sewage • • • • •
BOD ( Bio-Logical Oxygen Demand) COD (Chemical Oxygen Demand) TSS ( Total Suspended Solids ) pH Oil & Grease
• Type of Treatment for STP • Aerobic Treatment
• AnAerobic Treatment
• Takes Place in the presence of Air • Air can be provided by External Sources • The Organic Pollutants are converted in carbon DI-oxide and Water.
• Takes place in the absence of Air • The Organic Pollutants are converted by anaerobic organisms to a gas containing Methane and Carbon Di-oxide
• Comparison • Aerobic Treatment
• AnAerobic Treatment
• No Smell around the Area • Consumes more electrical energy • Sludge Production is high
• Smell all around the plant area • Energy consumption is low • Sludge Production is low
• Different Technologies to Treat Waste Water • • • • • • • •
Activated Sludge Process Extended Aeration Process Submerged Aerated Fixed Film Moving Bed Bio Reactor Sequential Batch reactor Electro Oxidation Membrane Bio Reactor Rotating Bio Logical Contactor
• Moving Bed Bio Reactor • In the MBBR bio film technology the bio film grows protected within engineered plastic carriers, which are carefully designed with high internal surface area. • These bio-film carriers are suspended and thoroughly mixed throughout the water phase. • With these technology it is possible to handle extremely high loading conditions without any problem of clogging and treat industrial, municipal, and domestic sewage or waste water on relatively low foot print area.
Inlet
• Flow Diagram for MBBR
Raw Sewage
Tertiary System
Treated Water
Bar Screen
Chlorination
Oil & Grease trap Chamber
Tube Settler
Sludge Handling
Equalization Tank
Bio-Reactor
Images
• Operating Parameter
Parameter
Inlet
Outlet
pH
7 to 8
6 to 7.5
BOD
250-350 mg/l
<30 mg/l
COD
400-600 mg/l
<100 mg/l
TSS
200-300
<20 mg/l
Oil & Grease
100
<5
Flow Sheet for MBBR Process
Presented By Vipul Chavda B.E. Chemical , MBA Director Cleantech Water +91-9558996411