Industrial Effluent Treatment
The various streams & waste water from washing and sewage are collected in septic tank & led into the raw sewage sump. The sewage is pumped into the Skid mounted Package type Sewage treatment Plant for biological oxidation of organic impurities in presence of activated (biomass) bacterial sludge.
The aeration is imparted by Diffused type aerators installed in the tank. The biological treatment method followed is of Moving Bed Bio Reactor (MBBR), also known as Fluidized Bio Reactor (FAB). The air is induced in the tank from bottom and it moves upward through moving Media. Moving media due to its movement ensures full utilization of oxygen in the air before it reaches top.
The bacteria's which form film on the moving Media utilizes this oxygen and degrades the substrate coming from the sewage water. Increased surface area increases the quantum of the biomass to great extent and thus can sustain shock loads. The Moving film of bacteria's falls down as soon as its thickness increases beyond certain limit. The anaerobic growth at the bottom most layers makes it loose and it falls down. This makes the maintenance of biomass fully automatic. The sludge settled at bottom is drained out, by Sludge transfer pump into Sludge drying bed.
The overflow of Aeration tank is allowed to pass through a Tube Settler. Any carryover of the suspended solids is settled here. The clarified effluent that overflows from Tube Settler is chlorinated with Sodium hypochlorite solution for disinfection and then filtered in a pressure filter. Alum solution is dosed for coagulation of suspended and colloidal impurities prior to the filtration. The filtered, treated effluent can very well be used for irrigation or discharged into drains as it confirms to the standards stipulated by Pollution Control Board.
