The activated sludge pilot plant consists of an oxidation reactor, of a settler and of a final chlorination tank, according to the traditional diagram of single-stage sewage treatment process. Biomass is oxidized in a reactor with agitator by the air blown by a compressor. The processed liquid is sent to the settler through an overflow. The sludge settling on settler bottom are recycled by are circulation pump into the oxidation tank.
The water flowing out of the settler is chlorinated and conveyed to a drain. Process control,data acquisition and supervision are automatically carried out by a microprocessor controller and by a specific control and supervision software that enables the remote control of various operational parameters.
The process unit enables to develop and analyze the following issues:
Purification efficiency versus the following parameters:
composition of water to be treated
pH in oxidation tank
concentration of dissolved oxygen
Automatic PID control
Framework of AISI 304 stainless steel with castors.
Feed tank with capacity of 700 l.
Cylindrical oxidation reactor of transparent methacrylate, with capacity of 300 l,including an agitator of AISI 304 stainless steel with geared motor and air diffuser of AISI 316 sintered stainless steel.
Settler of transparent methacrylate, with capacity of 150 l.
Feed tank for hypochlorite solution, with capacity of 20 l.
Chlorination tank of transparent methacrylate, with capacity of 6 l.
Magnetic drive feed gear pump, with body of AISI 316 stainless steel, flow-rate 0 to 60l/h.
Sludge recirculation magnetic drive gear pump, with body of AISI 316 stainless steel,flow rate 0 to 60 l/h.
Metering pump of sodium hypochlorite, flow rate of 0 to 1.5 l/h.
Diaphragm compressor with body of stainless steel, flow rate of 1.2 Nm /h.
Board-type microprocessor-controlled pH-meter, with range of 2 to 12 pH and 4-20 mA output signal.
Board-type microprocessor-controlled dissolved oxygen meter, with range of 0 to 10 ppm and 4-20 mA output signal
Flowmeter for measuring the feed flow rate of air to the reactor, with range of 0 to 1800 Nl/h.
Electronic flow transmitter for feed flow rate, with range of 0 to 60 l/hand 4 to 20 mA output signal.
Board-type electronic indicator of feed flow rate with range of 0 to 60 l/h.
Electronic flow transmitter for sludge re circulation flow rate with range of 0 to 60 l/h and 4to 20 mA output signal
Board-type electronic indicator of sludge re circulation flow rate with range of 0 to 60 l/h
ThermoresistancePt 100 with sheath of AISI 316 stainless steel
Board-typeelectronic temperature indicator
Switchboard,complying with EC conformity mark, including plant synoptic and ELCB
Connectinglines and valves of AISI 304 and 316 stainless steel
Max. feed: 1kg/day of COD (1.7 g/l for a flow rate of 25 l/h).
An ENGLISHinstruction manual consisting of experimental procedures, block diagram etc.will be provided along with the Apparatus.
The wholeset-up is well designed and arranged on a rigid structure painted withindustrial PU Paint.