I N N O V A T O R S
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D E D I C A T E D
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ENVIRONMENTAL
APPLICATIONS
Via Don Battistoni, 1 - 60035 Jesi (AN) Italy
Phone +39 0731.2311- Fax +39 0731.231239
www.pieralisi.com - [email protected]
D E D I C A T E D
I N N O V A T O R S
Environmental Applications
The indiscriminate use of the resources on Earth threatens the existence of life on the
planet. Recovering these resources is the world’s future challenge for making human
life on Earth sustainable. Especially for those resources that are not renewable, such as
water, Pieralisi Group offers a longtime experience and a strong expertise to guarantee
an important contribution to this mission.
We are a global presence with 16.000 installed plants. Since 1970, we design and
develop solutions for sludge thickening and dewatering, basing on our large range of
continuously innovated decanters and separators. Pieralisi centrifuges allow to recover
industrial and process fluids by removing solid and liquid contaminants with significant
environmental and economic advantages.
1 . Municipal waste
2 . Bio waste
3 . Breweries waste water
4 . Fruit juice waste water
5 . Wineries waste water
6 . Water purifying
7 . Pharmaceutical waste water
8 . Tannery waste water
9 . Sugarbeet processing waste water
10 . Tomato processing waste water
Environmental Applications: Processes
D E D I C A T E D
1
Municipal Waste
I N N O V A T O R S
Pre-aeration
Environmental Applications: Processes
2
Bio Waste
Waste
Effluent
D E D I C A T E D
I N N O V A T O R S
Raw
Product
Solid Removal
Sorting
Oil Removal
Oil Removal
Clariflocculation
Anaerobic
Fermentation
Equalization
Bioreactor
Gasometer
Electrical
Power Unit
Screw Press
Clarified Water
Liquor
Clarified Water
Primary
Sedimentation
Dewatering
Anaerobic
Digestion
Biogas
Denitrification
Oxidation
Nitrification
Secondary
Settlement
Thickening
Aerobic
Stabilization
Thickening
Clarified Water
Solid
Solid
WWTP
Composting
Pag 10
Dewatering
Pag 12
Pag 10
Filtration
Dewatering
Disinfection
Pag 12
Sludge Aerobic Treatment
Thickening
Water Treatment
Pag 12
Sludge Anaerobic Treatment
2
Solids Disposal
Surface Water
Solids Disposal
Process section involving Pieralisi technologies
Example of Process Flow Diagram
Process section involving Pieralisi technologies
Example of Process Flow Diagram
3
4
Environmental Applications: Processes
3
Breweries
Waste Water
D E D I C A T E D
I N N O V A T O R S
Environmental Applications: Processes
5
Wineries
Waste Water
Production
Process
I N N O V A T O R S
Clarified Water
Production
Process
Waste Water
Waste Water
pH value adjusting
Sand filter
Strainer
Anaerobic Reactor
Anaerobic
Cleaning Stage
D E D I C A T E D
Water
Strainer
Wet Sludge Disposal
Pre-treatment
Biogas
Activation
Sedimentation
Sand Filter
Dewatering
Pag 12
Process Water
WWTP
Dewatered Sludge
Clarified
Water
Dewatering
Solids Disposal
Clarified Liquid
Pag 12
Dewatered Sludge
Solids Disposal
Process section involving Pieralisi technologies
4
Fruit Juice
Waste Water
6
Water Purifying
Production
Process
Waste Water
Process section involving Pieralisi technologies
Example of Process Flow Diagram
Production
Process
Clarified Water
Waste Water
Strainer
Chemical Treatment
Multi-stage
Filtration
Sedimentation
Neutralization
Pre-treatment
Anaerobic Treatment
Activation
Sedimentation
Example of Process Flow Diagram
Water
Thickening
Dewatering
Pag 12
Clarified
Water
Dewatering
Dewatered Sludge
Solids Disposal
Pag 12
Dewatered Sludge
Clarified Liquid
Process section involving Pieralisi technologies
Example of Process Flow Diagram
Filtered Water
as Drinking Water
Process section involving Pieralisi technologies
Solids Disposal
Example of Process Flow Diagram
5
6
Environmental Applications: Processes
7
Pharmaceutical
Waste Water
D E D I C A T E D
I N N O V A T O R S
9
Sugarbeet
Processing
Waste Water
Production
Process
Clarified Water
Waste Water
Environmental Applications: Processes
D E D I C A T E D
Production
Process
Clean Water Make Up
Waste Water
Rake / Defatting
Clarifier
Neutralization
Pre-treatment
Homogenization
Tank
Activation
Sedimentation
Sludge
I N N O V A T O R S
Clean
Water
Clarified
Water
Dewatering
Anaerobic Treatment
Pag 12
Dewatering
Dewatered Sludge
Pag 12
Dewatered Sludge
Solids Disposal
Solids Disposal
Clarified Liquid
Process section involving Pieralisi technologies
Process section involving Pieralisi technologies
Example of Process Flow Diagram
8
Tannery
Waste Water
10
Tomato
Processing
Waste Water
Production
Process
Example of Process Flow Diagram
Production
Process
Waste Water
Clean Water Make Up
Solid Removal
Waste Water
Biological
Oxidation
Polymer Solution
Dewatering
Solids Disposal
Biological
Treatment
Waste Water
Clean
Water
Settling
Sludge
Pag 12
Thickening
Clarified
Water
Dewatering
Pag 12
Dewatered Sludge
Process section involving Pieralisi technologies
Example of Process Flow Diagram
Process section involving Pieralisi technologies
Solids Disposal
Example of Process Flow Diagram
7
10
Environmental Applications: Thickening
D E D I C A T E D
I N N O V A T O R S
Environmental Applications: Thickening
D E D I C A T E D
I N N O V A T O R S
The Thickening Solution
5. Control Panel
Flushing Water
4. Flushing Valve
Flushing Water
4. Flushing Valve
6. Decanter
Centrifuge
Sludge
Mixer
TYPICAL VALUES
0,5÷2% DS
3a. Flow Meter
1. Pump
2. Polymer Unit
Dosing
Tank
3b. Flow Meter
Clarified Water
Drain
Powder Polymer
Mixing and
Activation
Tank
Water
Water
Thickened Sludge
Liquid Polymer
TYPICAL VALUES
7. Pump
6 ÷ 8 % DS
Tank
2a. Dosing Pump
A complete line of a solid-liquid
thickening plant consists of the
following equipment:
1
2
2a
2b
3a
3b
4
5
6
7
.
.
.
.
.
.
.
.
.
.
2b. Pump
Sludge feeding pump (mono pump)
Preparation unit for polymer solution (for liquid or powder active ingredients)
Liquid polymer dosing pump
Polymer solution feeding pump
Sludge flow meter
Polymer solution flow meter
Flushing valves
Main control panel
Decanter centrifuge
Pump for thickened sludge
Thickening:
volume reduction and
solid concentration increase
100
80
60
Decanters are used for dynamic thickening
in order to increase the solid concentration
in the liquid up to 6-8% dry solid.
Thickened sludge is usually sent to
the following dewatering step.
IN
Thi
c
ken
i
40
ng
Pro
ces
s
OUT
20
0
0,5÷2% DS
6÷8% DS
11
12
Environmental Applications: Dewatering
D E D I C A T E D
I N N O V A T O R S
Environmental Applications: Dewatering
D E D I C A T E D
I N N O V A T O R S
The Dewatering Solution
5. Control Panel
Flushing Water
4. Flushing Valve
Flushing Water
4. Flushing Valve
6. Decanter
Centrifuge
Sludge
Mixer
TYPICAL VALUES
1÷10% DS
3a. Flow Meter
1. Pump
2. Polymer Unit
Dosing
Tank
3b. Flow Meter
Clarified Water
Drain
Powder Polymer
Mixing and
Activation
Tank
Water
Water
Solid Cake
7. Screw Conveyor
Liquid Polymer
TYPICAL VALUES
25 ÷ 30 % DS
Drain
Tank
2a. Dosing Pump
A complete line of a solid-liquid
dewatering plant consists of the
following equipment:
1
2
2a
2b
3a
3b
4
5
6
7
.
.
.
.
.
.
.
.
.
.
2b. Pump
Sludge feeding pump (mono pump)
Preparation unit for polymer solution (for liquid or powder active ingredients)
Liquid polymer dosing pump
Polymer solution feeding pump
Sludge flow meter
Polymer solution flow meter
Flushing valves
Main control panel
Decanter centrifuge
Screw conveyor for solid cake trasportation
Dewatering:
volume reduction and
solid concentration increase
100
80
60
Decanters are used for dynamic solid-liquid
separation and dewatering; the inlet solid
concentration increases up to 20-35% dry solid,
depending on the sludge stabilization efficiency
obtained in the previous treatment steps.
IN
De
wa
te
rin
40
20
gP
roc
ess
OUT
0
1÷10% DS
20÷35% DS
13
14
Environmental Applications: Components
D E D I C A T E D
I N N O V A T O R S
Environmental Applications: Components
D E D I C A T E D
I N N O V A T O R S
Preparation unit for polymer solution
Several additives are largely considered to increase the performance of
thickening and dewatering plants. Polyelectrolyte is the type of additive
most commonly used for environmental applications.
Pieralisi polymer preparation unit is specifically designed to be
operated both with powder and liquid additives according to the
specific requirements of the client. The results is a fully homogenized
and activated polymer solution with the concentration suitable for the
requested performances. The system is suitable to work on a continuous
base and its automatic control can be demanded to a dedicated local
panel or integrated in the main control panel.
a
b
Pumps
Decanter Centrifuge
High efficiency separation unit capable to handle liquid mixture containing
a considerable amount of solid particles. Decanter performances are related
not only to process operating parameters but also to the mixture composition,
density and viscosity of the different phases, solid density and particles size.
The internal centrifugal force is the result of the rotational speed coupled with
the large bowl diameter. The decanter is driven by a main motor connected
to the horizontal shaft of the bowl. The product enters through the feed pipe
into the centre of the bowl where it is accelerated generating the solid-liquid
separation.
The clarified liquid phase is discharged from the rotating bowl by means of
special devices on one side of the bowl.
The dewatered solid, collected on the bowl internal walls, is transported by
the scroll and continuously discharged on the opposite side.
Several options are available to configure the decanter accordingly to the
requirements of each specific process. Solid scraper (a) and gate valve (b) are
the most commonly used in environmental applications.
a
The centrifugal technology requires a constant inlet flow in order to keep
stable separation conditions. For this reason, mono pumps (progressive
cavity pumps) are usually installed to properly feed the sludge and the
polymer solution to the decanter and eventually to pump the clarified
liquid to the storage area. Each pump can be equipped with VFD,
constantly monitored and automatically regulated by the main control
panel.
Flow Meter
b
The possibility to measure the flows to the decanter allows a more precise
control of the operating parameters assuring cost optimization and more
stable performances. Pieralisi installs on its unit only major brands flow
meters with proven quality and reliability.
Sludge – Polymer Mixer
The proper mixing of the activated polymer solution into the sludge is
a key factor for the separation performances. Pieralisi static mixer is
designed to blend the flows in a gently and effective way, guaranteeing
the full contact of the polymer with the sludge solid particles.
Screw Conveyor
Electrical and control panel
“Pieralisi Control System” is divided in two main sections: power and control.
In the power unit are placed all the main switches and the variable frequency
drivers (VFD) for both decanter and auxiliaries. The control module is based
on a PLC and HMI with touch screen panel. A dedicated software, designed
by Pieralisi automation department, is embedded in the PLC to automatically
control the whole thickening and dewatering sections in each operating step:
start-up, duty, flushing and shut-down. The HMI allows to navigate through
several areas:
• separation process monitoring
• operating parameters control
• alarms detection
• trends display
The last control release optimizes the separation performances and stabilizes
the operation conditions by controlling the decanter in “torque mode”. The
logic is continuously measuring the torque on the decanter scroll, keeping it
stable at its set point value, by smoothly acting on the scroll differential speed.
All Pieralisi control panels can be equipped with a dedicated module for
remote connections and assistance.
The solid exiting from the decanter can be discharged by gravity on an
underlying container or transported to a side container by means of a
screw conveyor. The unique design of Pieralisi decanter allows to install
both horizontal and inclined conveyors directly under the solid outlet.
The layout of the conveying system is tailored on the specific path
required on each site and can be based on a multiple solution with more
than one element. In any case the control of each component and the
automatic management of the transition sequences is implemented in the
main control panel in accordance with the decanter operating status.
Flushing Valves
The flushing procedure is a key factor for the main components life cycle
and long term performance stability. Thus, two specific cleaning sequence
are automatically activated by the PLC before the centrifuge shut down or
in case of necessity. Dedicated solenoid valves are installed on the circuits
to allow the flushing of both the internal part of the rotating assembly and
the case volume outside the bowl. The flushing cycle parameters can be
adjusted from the HMI in accordance to the requirements of each plants.
15
Bowl
ROTATING
ASSEMBLY
Scroll
Bowl
Scroll
MATERIALS
Case
Parts in contact
with the product
EXECUTION
Installation area
LUBRICATION
Gearbox
Bearings
PROCESS
CONFIGURATION
Liquid outlet
Bowl drive
DRIVES
Scroll drive
DECANTER
OPTIONS
Kits and Systems
PLANT
OPTIONS
Kits and Systems
Steep cone
Shallow cone
Inner surface with liners
Inner surface with grooves
Wear protections solid discharge bushings (replaceable)
Wear protections inner surface (flame spray)
Single flight
Reduced pitch flight
Variable pitch flight
Flight with windows
Flight wear protections: sprayed tungsten carbide
Flight wear protection: tiles (replaceable)
01
Diffuser wear protections : plates (replaceable)
SAF 2205 Duplex stainless steel
AISI 414 stainless steel
AISI 304 stainless steel
AISI 316 stainless steel
Painted carbon steel case and subframe
Stainless steel cylindrical body
Stainless steel solid-liquid chambers
Stainless steel subframe
Stainless steel
Tailored on the application and International or European standard
Safe area (not hazardous area)
Hazardous area: ATEX Zone 1
Hazardous area: ATEX Zone 2
Oil bath
Automatic greasing
Fruit juice waste water
Wineries waste water
Water purifying
Pharmaceutical waste water
Tannery waste water
Sugarbeet processing waste water
Tomato processing waste water
Configuration Table
Breweries waste water
D E D I C A T E D
Bio waste
Environmental Applications: Configuration Table
Municipal waste
16
01
1
2
3
4
5
6
7
8
9
10
I N N O V A T O R S
02
03
04
Two phases (1 liquid - 1 solid)
Three phases (2 liquids - 1 solid)
Interchangeable liquid outlet levels
Liquid discharge level adjustable during operation
Electric motor
Hydraulic motor
Fixed differential speed (countershaft)
Electric motor (back drive)
Hydraulic motor
Rotovariator
Control panel
Counter pressure valve
Cooling fan
Inertization system
Solids scraper device
02
Cyclone kit
Gate valve kit
03
CIP washing system
Filtering unit
Additive unit
Solid conveyor system
Homogenizing system
Feeding pump
Flow rate measurement kit
Heating system
04