DAYLIFF BUF 4 Istruzioni per l'installazione

Installation &

Operating Manual

BUF 4

Ultrafiltration Treatment Plant

SPECIFICATIONS

INSTALLATION 4

INDEX

Contents herein are not warranted

4. MAINTENANCE 9

2.1 Equipment Specication 4

2.2 Module Description 4

OPERATION 5

3.1 Pre Treatment 5

3.2 Filtration & Flushing Process 5

3.3 Start Up & Start Up Pre Checks 8

3.4 Module Flushing 8

3.5 Shutdown 8

4.1 CIP 9

4.2 Fouling 10

4.3 Handling & Storage Procedure for UF Membranes

5. TROUBLE SHOOTING 11

6. TERMS OF WARRANTY 14

1. SPECIFICATIONS

DAYLIFF BUF4 Ultrafiltration plants are highly effective, easy to operate and simple to

maintain systems that offer the ideal solution for small and medium scale water treatment

requirements. Their particular application is for the removal of particles, colloidal

material, sand, organic and inorganic polymeric particles. They are particularly suitable

for the treatment of polluted surface waters from dams, rivers, reservoirs etc. as well as

wastewater recovery. The process will not remove dissolved salts including sodium,

calcium and chlorides and so is not suited to the treatment of groundwater with high TDS

levels. Standard models are suitable for low turbidity (up to 15NTU) raw water

applications.

Systems are frame mounted and supplied as complete units with all necessary accessories

and controls for simple integration with the flow process.

Congratulations on selecting a BUF4 Ultraltration Treatment Plant.

They are manufactured to the highest standards and if installed and

operated correctly will give many years of efcient and trouble free

service. Careful reading of this Installation Manual is therefore

important, though should there be any queries they should be

referred to the equipment supplier.

Filtrate

B/Wash CIP

Tank 100LT

Pump

controller

120 Microns

Strainer

Flush Valve

Raw

Water Inlet Valve

Dayliff UF Membrane

Drain

Valve

They offer the following features:-

• Fully automated plant operation including normal filtration and backwash cycle

with solenoid valve activation.

• High efficiency single Dayliff feed/backwash/cleaning pump with integral Brio

pump controller for auto switching and dry run protection.

• 120-micron pre-filter.

• Integrated CIP/Cleaning/Backwash/Flushing tank.

• System monitoring instruments including product flow meter and pressure gauges.

• Skid mounted for simple installation.

DAYLIFF BUF4 systems provide a high performance, high efficiency treatment process that

produces fully potable water without chemical additions. The process uses low energy

consumption and provides consistent quality without frequent operational intervention.

Due to the efficiency of the membranes, it also offers considerable savings over

conventional systems and is the ideal solution where potable water is required.

OPERATING PARAMETERS

Operating Pressure: 0.2 - 2bar

Maximum Feed Pressure: 3 Bar

Maximum Operating Trans Membrane Pressure (TMP): 2 Bar

Chlorine Tolerance: 100 ppm

Max Operating Temp: 45 C

Operating pH Range: 2-12

Raw Water Quality: Turbidity <15 NTU, Oil/Grease 0 mg/l

Treated Water Quality: <0.2μm

Recovery Range: 95-98% depending on raw water quality.

Backwash Frequency: Every 20-60mins

A raw water analysis should be provided to establish the extent of pre-treatment

necessary.

EQUIPMENT SPECIFICATIONS

BUF4/140BUF4/70BUF4/40

Flow Rate(m /hr)

No. Membrane Modules

Pump

0.35

0.25

DDP50A

1200x1100x1700

0.7

1.0

100

1.4

110

0.37 0.75

3 4

DDP60 DDP65

Dimensions (LxWxH)mm

Weight, Kg

Type

BUF4/100

Ultrafiltration (UF) involves pressure-driven separation of materials from a feed solution.

The technology is used to remove particulate and microbial contaminants, but it does not

remove ions and small molecules. Pressure drives the process, which typically operates

with a feed pressure of 0.2 to 2bar. UF plants are automated and have low operational

labor requirements. These systems, however, can require frequent cleaning. UF

membranes are commercially available in tubular, hollow-fiber, and spiral wound

configurations.

UF membranes reject solutes ranging in size from 0.2 microns and larger. The UF

membrane process separates molecules within the solution on the basis of size. The pore

size and molecular weight cut-off (MWCO) are often used to characterize a membrane.

The pore size is the nominal diameter of the openings or micro-pores in the membrane

expressed in microns. BUF4 membranes have a 100K pore size.

Different membrane materials with the same nominal MWCO may have differing particle

rejection. Pore size distribution and uniformity rather than the chemical nature of the

membrane material may cause this effect.

1.1 Working Principle

Fig 1: Material Size and Membrane Filtration Process Guide

Metal Ions

Insecticides

Micrometers (log scale)

Human Hair

0.0001 0.001

0.01

100

0.1 1.0 10 100

Micrometers (log scale)

Approximate Molecular Weight (Daltons)

200 1,000 10,000 20,000 100,000 500,000

Angstrom Units (Log Scale)

100 1000 10' 10' 10'

Separation Processes

Reverse Osmosis

IX Nanoltration

DOW Electrodeionization DOW Ultraltration

Microltration

3 6 8 2 3 6 8 2 3 6 8

200

300

600

800

2000

3000

6000

8000

Ionic Range Molecular Range Macro Molecular Range Micro Particular Range MacroParticular Range

Latex Emulsions

Endotoxins Pyrogens

Soluble Salts

Antibiotics

Dissolved Organics

Crypto

Bacteria

Colloids

Algae

Viruses

Relative Size of Common Materials

Glardia

2. INSTALLATION

2.1 Equipment Specication

The Ultrafiltration plant consists of the following major components

1. Feed pump/Backwash/CIP pump.

2. Electric Solenoid valves -Inlet, Flush and Drain valves.

3. Backwash/CIP tank.

4. Pump controller.

5. Timer circuit.

6. UF membrane.

7. Piping.

8. Optional Waste water tank.

9. Optional Raw water tank.

10. Optional chemical dosing tanks.

11. Optional chemical dosing systems.

2.2 Module Description

Systems are frame mounted and supplied as complete units with all necessary accessories

and controls for simple integration with the flow process. They offer the following

features:-

ŸFully automated plant operation including normal filtration and flushing cycle.

ŸHigh efficiency single Dayliff feed/backwash/Cleaning pump saving energy, i.e.

Low CAPEX and OPEX.

ŸIntegrated automated backwash/flushing/cleaning process.

ŸSystem monitoring instruments including product flow meter and pressure gauges.

Ÿ120-micron pre-filter.

ŸSkid mounted for simple installation.

ŸIntegrated CIP/Cleaning/Backwash/Flushing tank.

ŸDry running pump protection

Fig 2: UF Membrane Cross Section

1. Feed water enters chamber on offset

2. Floods hollow fibres internally

3. Breaks through walls

4. Exits through middle (center tub) pipe

5. Flows through center fitting

6. Electric valve flush valve opened to strip build up inside each hollow fibre

Centre tube

with holes in

Clamp

Seal

Product

(Clean)

Flush

End Cap

Raw

Feed

Hollow Fibre

Magnied

3. OPERATION

3.1 Pre Treatment

Ultrafiltration membrane designs are based on qualified feed water conditions as shown

in table above. If the feed water quality is outside of the required levels, a pilot study should

be done to confirm performance, increase the number of UF membranes to lower

filtration flux or pretreatment must be considered.

Depending on application, a safety screen of 150 – 300 microns is recommended on the

feed to the UF system, which must be frequently cleaned at least once a day depending on

If the system is designed and installed to the conditions shown

but the feed water quality is not maintained as required, then

consult a Dayliff retailer.

WARNING

Depending on application, a safety screen of 120 microns is recommended on the feed to

the UF system, which must be frequently cleaned at least once a day depending on the

quality of water. A variety of technologies can be used such as self-cleaning screens and

bag, cartridge, or disc filters. Depending on the type of water or range of feed water

parameters other pretreatment technologies such as oxidation, coagulation, and

sedimentation and media filtration may also be recommended.

3.2 Filtration & Flushing Process

Fig 3: Filtration Step for UF membrane

Solenoid

Inlet

Valve Feed

Pump

Controller

Solenoid

Inlet

Valve

Solenoid

Flush

Valve

B/Wash

CIP

Tank

100LT

Drain

120 Microns

Strainder

FILTRATE

Solenoid

Drain

Valve

To Drain

Dayliff UF Membrane

Filtration

ŸInlet solenoid valves open|flush solenoid valve closed|Drain

solenoid valve closed

ŸSettable timer settings - 30min*

ŸFlush tank filling until full

ŸMonitor differential pressure (feed pressure filtrate pressure

should never be more than 2Bar

ŸRegular cleaning of feed line screen filter every week or

sooner

Normal operation refers to the routine operating sequence of a system and includes the

filtration and flushing steps. At initial startup, the UF membranes are flushed for 3hrs to

remove any residual chemicals.

•This is done by manually adjusting the timer box settings to extend flushing time. The

flush process does not make filtrate.

•After the start up forward flush is done, the UF membrane can be placed in the

filtration mode by manually adjusting the timer settings.

•A filtration cycle ranges from 6 to 30 minutes and while in operation, all the feed

water is converted into a filtrate. As contaminants are removed during the filtration

mode, the trans-membrane pressure (TMP) increases (difference in pressure

between the feed and the filtrate line).

•At the end of the set filtration cycle time, a flushing (cleaning) sequence will be

triggered automatically for the flush duration set and the process is routine and

repetitive during normal operation.

Fig 4: UF Membrane Flushing

Flushing

ŸInlet solenoid valves closed| Flush Solenoid Valve

Open | Drain solenoid valve open

ŸSettable timer settings - 30 Secs*

ŸFlush tank filtrate water level falling

Pump

Controller

To Drain

Solenoid

Inlet

Valve Feed 120 Microns

Strainder

Solenoid

Flush

Valve

Flush

CIP

Tank

100LT

Drain

Solenoid

Drain

Valve

FILTRATE

Dayliff UF Membrane

•The flushing mode occurs automatically (after manually setting the timer) and is

used to loosen and wash-out particulates deposited on the hollow fiber of the UF

membrane.

•It's critical that the flushing time be set long enough to wash-out all dirt until clear

water is observed.

•The flush time may therefore vary depending on the water quality. Typically, 30sec is

set as standard flush time but should be changed at site appropriately.

Fig 5: BUF4 CIP Process

CIP

ŸInlet solenoid valves closed| Flush Solenoid Valve

Open | Drain solenoid valve open

ŸSettable timer settings - 60min* until no pH change

ŸCIP tank chemical recirculating

Pump

Controller

To Drain

Solenoid

Inlet

Valve

Feed 120 Microns

Strainder

Solenoid

Flush

Valve

Flush

CIP

Tank

100LT

Drain

Solenoid

Drain

Valve

FILTRATE

Dayliff UF Membrane

The Clean in Place (CIP) is performed by circulating CIP chemicals until UF membrane

recovers operating flow and pressure.

•During the CIP process recirculation of the chemical is done until there is no further

change in the pH of the CIP chemicals which indicate no further chemical reaction is

ongoing.

•A soak operation can also be included to improve the effectiveness of the cleaning.

•Soaking for 1-2hrs allows more time for the chemical to react with contaminants that

have attached to the membrane surface or penetrated the fiber wall. To soak, once

the unit is circulating the CIP chemical, power off the unit and close off all ball valves

to ensure CIP chemical stays within the UF membranes for the soak period. After the

soak a routine flushing is performed to remove any remaining particulates and

residual chemicals.

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