COAGULATION, FLOCCULATION AND SETTLING PILOT PLANT.

INTRODUCTION

Coagulation - fl occulation - settling processes are generally
used to separate colloids from water, as in this case natural
settling speed is too slow to obtain a suffi cient clarifi cation.
This plant enables to study the coagulation, fl occulation and
settling processes separately or simultaneously and it mainly
consists of a stirred feed tank, of two tanks for fl occulant
and coagulant, of a stirred coagulation tank, of a stirred
fl occulation tank and of a plate settler.
Process control, data acquisition and supervision are
automatically carried out by a microprocessor controller
and by a specifi c control and supervision software
 that enables the remote control of various
operational parameters.

TRAINING PROGRAM:
The process unit enables to develop and analyze the following
issues:
• coagulation
• fl occulation
• co-current and counter-current settling
• characteristics of coagulant and of fl occulants
• optimization of coagulation – fl occulation and settling
processes
• automatic PID control
• plant supervision

TECHNICAL CHARACTERISTICS:
Framework of AISI 304 stainless steel with castors
• Cylindrical feed tank of transparent methacrylate for the
water to be treated with submersible pump and capacity of
300 l
• Feed tank of transparent methacrylate for coagulant with
capacity of 60 l
• Feed tank of glass for fl occulant, provided with hot-plate
magnetic stirrer, with capacity of 0.5 l
• Coagulation reactor of borosilicate glass, equipped with
motor-driven stirrer (0 to 300 r.p.m.), with capacity of 30 l
• Flocculation reactor of borosilicate glass, equipped with
motor-driven stirrer (0 to 100 r.p.m.), with capacity of 8 l
• Rectangular settler of transparent methacrylate with conical
bottom and movable plates for its operation in co-current
and counter-current
• Flowmeter of AISI 304 stainless steel for measuring feed fl ow
rate with range of 30 to 300 l/h
• Flowmeter of coagulant feed with range of 2 to 20 l/h
• Feed screw pump with casing and screw of AISI 316 stainless
steel and fl ow rate of 0 to 200 l/h
• Electronic frequency variator for screw pump
• Gear feed pump of AISI 316 stainless steel for coagulant, with
fl ow-rate of 0 to 50 l/h
• Metering pump of fl occulant, with fl ow rate of 0 to 200 ml/h
• Switchboard IP55, complying with EC conformity mark,
including plant synoptic and ELCB
• Digital microprocessor PID controller, with two control loops
• Supervision software for Windows: it enables to control ONOFF
signals, analog signals coming from PID controller, realtime
trend and historical trend
Dimensions: 1800 x 800 x 2700 mm
Weight: 300 kg
Supplied

THEORETICAL – PRACTICAL –
EXPERIMENTAL HANDBOOK