Typical Raw Effluent Quality for Low BOD Wastewater
pH	6-9
BOD	200-300 mg/l
COD	500-800 mg/l
TSS	100-200 mg/l
Oil & Grease	10-20 mg/l

 

 

Typical Outlet Parameters after Secondary Treatment
pH	6.5 - 8.5
BOD	< 30 mg/l
COD	< 250 mg/l
TSS	< 100 mg/l
Oil & Grease	< 10 mg/l

 

The Treatment Process

 

Raw Effluent from entire factory will flow by gravity to Collection Tank through a Bar Screen Chamber. In this chamber bigger size solid particles (>10 mm particle size) as well as leaves, twigs etc. will be separated. Then the whole waste is pumped to an Aeration Tank/ SAFF Reactor/ FAB Reactor, where removal of organic matter will take place. The type of reactor will be decided based on area available at site, underground/ aboveground process, height restriction etc. In this Reactorfixed surface/ floating surface/ diffused aeration system will be provided for effective mixing & aeration necessary for proper growth of micro-organisms. For proper growth & maintenance of micro-organisms special bacteria (EM) culture will be dosed periodically.

 

The effluent comprising of the biological floc from the Reactorwill overflow into Tube/ Plate/ Lamella Settler or Secondary Clarifier where they will settle down at the bottom. This underflow sludge will be recycled back by the Sludge Pump to the Reactorto maintain the population of micro-organisms. Excess sludge will be periodically transferred to Sludge Drying Beds or passed through a Filter Press, where sludge will be collected & disposed off whenever required.

 

The overflow water from Settler/ Clarifier will be discharged to municipal sewer.

 

Advantages of the Technology

            1]         Low Project Cost
            2]         Minimum Operating Cost
            3]         Easy & Minimum Maintenance
            4]         Can Handle Shock Load

 

 

	Overflow of Secondary Clarifier
	Outlet Clear Water
	Click to enlarge