Examples of membrane application for water reclamation and ...Examples of membrane application for water reclamation and reuse The Association introduces examples of membrane application

Examples of membrane application for water reclamation and reuse

The Association introduces examples of membrane application of water reclamation and reuse which were

collected from member companies in the fiscal year 2018.

Renewal date: May 9, 2019

●Examples of domestic application

Example 1: Reuse of reclaiming water from sewage

(1) Outline In response to the needs of reclaiming water from sewage for amenities-use and

irrigation water, a low pressure reverse osmosis (RO) system for sewage advanced

treatment provides, at low running cost, ultra-high-grade treated water which is not

only clear but also safe and hygienic, even if you touch it with your hands or feet, or

get in your mouth.

(2) Usage of reclaimed water

⚫ Amenities-use water (like artificial stream, waterfall, pond, and water fountain).

⚫ Car washing water as miscellaneous-use water.

(3) Flowsheet of the process

(1) An extremely clean, safe and hygienic treated water quality which is comparable

to tap water from a drinking water treatment plant can be obtained.

(2) Energy saving owing to using low-pressure RO operation (at 1 MPa or less) enables

to deduce running costs.

(3) Simplified configuration enables automated operation and easy maintenance.

(4) Specifications of the process

⚫ Permeate water flux: 50 m3/d

(5) Specifications of membrane module

⚫ Spiral-wound type RO membrane

⚫ Pressure vessel, 4-inch diameter (made of Fiber Reinforced Plastic)

(6) Water quality Quality parameter Feed

(Secondary treated water)

RO treated water

(Product water)

Drinking-water

standards

Transparency (deg) 55 >100 －

Turbidity (deg) 5.5 <0.1 <2

Color (deg) 14.6 <0.1 <5

MBAS (mg/L) 0.03 <0.01 <0.5

Coliforms (CFU/100 mL) 140 ND ND

BOD (mg/L) 15 <1 －

COD (mg/L) 12 <1 <10

T-P (mg/L) 1.2 <0.005 －

T-N (mg/L) 18 6 －

(7) Pictures, brochure, etc.

Amenity-water park using RO treated water

Low pressure type RO sewage advanced treatment system

(8) Information, URL

Water infrastructure and Service Division,

Kobelco Eco-solutions Co. Ltd

http://www.kobelco-eco.co.jp/

Example 2: Reclaiming water from Factory process-effluent

(1) Outline Effluent from a plating process at a plating plant was discharged to sewage. Since

there was a demand to reclaim water from the drainage as an effective use of water,

the drainage recovery facility was delivered and operated to re-use water in 2012.

(2) Usage of

reclaimed water

Industrial water (partly reused for a feed water of the pure water process)


Removing turbidity with MF membrane and desalination by RO membrane

(Due to high ion concentration of plating drainage, desalting treatment is needed to

reuse industrial water)


Treatment capacity: 120 m3/d

[Main equipment]

Number of MF membrane modules: 4

Number of RO membrane elements: 12

[Auxiliary equipment]

Chemical injection equipment: 1 set

Chemical cleaning equipment: 1 set

Effluent water neutralization equipment: 1 set


MF membrane

Membrane material: polyvinylidene fluoride (PVDF),

Membrane configuration: External pressure type hollow fiber membrane,

Nominal pore size: 0.1 μm,

Membrane area: 50m2

RO membrane

Membrane material: Synthetic polymer (polyamide thin-film composite: PA-TFC),

Membrane configuration: Spiral-wound type membrane,

Salt rejection: 99.5 % or more,

Membrane area: 37.2 m2

(6) Water quality Quality parameter Feed Treated water

pH (－) 7 7

Electrical Conductivity (mS/cm) 230 <20

Turbidity (deg) 5 <0.1

SS (mg/L) 10 <0.1

TOC (mg/L) 20 <0.5

Ca-Hardness (mg/L-CaCO3/L) 450 <0.2

SiO2 (mg/L) 15 0.5

(7) Pictures,

brochure, etc.

Whole-view photo of reclaiming water facility

(8) Information,

URL




Example 3: Reclaiming water from Municipal sewage-effluent

(1) Outline In order to reduce greenhouse gases and to live in harmony with the local community,

it was decided to accept sewage advanced treated water from a nearby sewage

treatment plant as an effective use of water resources, and therefore conventional

industrial water was changed with the treated water by membrane process. Operation

started in 2010.

(2) Usage of

reclaimed

water

Industrial water (cooling tower supply water etc.)

(3) Flowsheet of

the process

Remove turbidity with MF membrane and desalting with RO membrane

(There are many factories near the sewage treatment plant, and the ion concentration

in treated sewage is high. Desalination is required to reuse for the industrial water)

(4) Specifications

of the process

Treated water capacity: 13,500 m3 / day

[Main equipment]

Number of MF units: 6 sets + 1 set stand-by

Number of RO units: 6 sets + 1 set stand-by

[Auxiliary equipment]

Chemical injection equipment: 1 set

Chemical cleaning equipment: 1 set

Backwash wastewater recovery facility: 2 units

(5) Specifications

of membrane

module

MF membrane


Membrane configuration: External pressure type hollow fiber membrane,


Membrane area: 50m2

RO membrane

Membrane material: Synthetic polymer

(polyamide thin-film-composite membrane),

Membrane configuration: Spiral-wound type membrane,

Salt rejection: 99.5 % or more,

Membrane area: 37.2 m2

(6) Water quality Quality parameter Feed Treated water

pH (－) 7 – 7.5 5.8 – 8.6

Electrical Conductivity (mS/cm) 200 <22

Turbidity (deg) 5 <1

Cl (mg/L) 550 <20

SO42- (mg/L) 220 <20

Total-Hardness (mg/L-CaCO3/L) 330 <50

SiO2 (mg/L) 20 <10

(7) Pictures,

brochure, etc.





Example 4: Reclaiming water from Factory drainage-effluent

(1) Outline Since the foundation our customer whose policy of company management has been

based on “reusing and recycling resources” adopted the membrane bioreactor using

submerged type membrane modules for their wastewater treatment, when they moved

their manufacturing site. In sorting and reusing rental dust-clothes that are made

from used clothing and cutting waste etc., there is a water recycling process system

that properly treats and reuses the cleaning drainage from the process in the factory.


Water for primary cleaning such as used dust-clothes


(4) Specifications

of the process

Feed water: Industrial-dust-clothes / print-process-rags cleaning drainage

Volume of drainage: 250 m3/d

⚫ Drainage from laundry process is treated as follows: removing coarse

materials by screening, separating oil in oil-separation tank and by

flocculation pressure floatation equipment.

⚫ Due to high temperatures of the drainage, monitoring temperatures prior to

biological treatment process, and cooling it down, if necessary, in a cooling

tower.

⚫ The treated water excepting the sewage discharge (50m3) is actively reused

for primary washing water of used dust-clothes, etc.


Membrane type: MF membrane

Membrane material: chlorinated polyethylene,

Membrane module unit: 1 unit,

Membrane area: 80m2 / unit

(6) Water quality This table shows designed values and analyzed data in parenthesis, respectively

Quality parameter Feed Treated water

BOD (mg/L) 5,740 (6,730) <600 (4)

COD (mg/L) 2,570 (5,050) － (210)

SS (mg/L) 1,040 (2,900) <600 (<2)

n-Hex (mg/L) 19,870 (6,160) <30 (<3)

pH ( － ) 7.4 ~ 10.2 (10.4) 5 ~ 9 (6.8)

*1. Feed samples were obtained prior to the oil separation/pressure floatation

treatment. Treated water quality is equal to the sewage discharge standards.

*2. n-Hex showed the total concentration of mineral and animal/vegetable oils

contents.


(8) Information URL

Membrane system Division, Kubota Corporation

https://www.kubota.co.jp/product/membrane/

● Examples of Overseas Application

Example 5: Reclaiming water from an ink-manufacturing plant-effluent in India

(1) Outline An ink-manufacturing plant located in India introduced UF pretreatment system to

RO treatment system which was installed for zero liquid discharge purpose.


Reclaiming water for process make-up water

(3) Flowsheet of reclamation process


Max. treatment capacity: 2,000 m3/d


Membrane type: UF membrane

Number of UF modules: 88 modules, Membrane material: polyvinylidene fluoride (PVDF), Nominal pore size: 0.02 μm, Membrane area: 40m2/module

(6) Water quality Quality parameter UF feed UF treated water

pH (－) 6.9 7.1

Electrical Conductivity (mS/cm) 18.1 18.2

Turbidity (deg) 42 0.1


(8) Information URL

Kuraray Corporation

https://www.kuraray.co.jp/

Example 6: Reclaiming water from Textile Dyeing plant-effluent in Bangladesh

(1) Outline Bangladesh is the world's second largest apparel exporting country, but the

environmental conservation infrastructure of the plant was not in place. In 2017, our

UF membrane was introduced for the purpose of treatment and reclamation of

dyeing plant wastewater to improve the environment.


Reclaiming water for process make-up water



Max. treatment capacity: 12,000 m3/d


Membrane type: UF membrane

Number of UF modules: 12 modules,



Membrane area: 40m2/module

(6) Water quality Quality parameter UF feed UF treated water

pH (－) 8.0 8.1

Electrical Conductivity (mS/cm) 6.7 6.8

Turbidity (deg) 6.8 0.1


Fig. 1 UF membrane unit

(8) Information URL

Kuraray Corporation

https://www.kuraray.co.jp/

Example 7: Reclaiming water from Al Ansab STP( sewage treatment plant-effluent)

(1) Outline Sewage treatment plant in Muscat, Oman. MBR process was adopted for the purpose

of treated water reuse. The MBR facility of 55,000m3/d has been in operation since

2010, and then since 2018 the MBR facility as a total capacity of 125,000m3/d has

been operating after the additional construction. The MBR treated water is supplied

to a green zone adjacent to the treatment plant and used for a variety of applications

as well.


⚫ Irrigation water to green areas

⚫ Re-use of pipelines and tankers in the city

(Irrigation, park/golf course watering, cooling tower, etc.)



Facility Name: Al Ansab STP

Treatment method: Membrane separation activated sludge method

Processing capacity: 125,000m3/d

Operation start-up: 2010

Operation Management: HAYA Water

(5) Specifications of the membrane

Membrane type: MF membrane

Membrane material: chlorinated polyethylene,

Membrane module unit: 480 sets,

Membrane area: 580m2 / unit

(6) Water quality Quality parameter Feed MBR treated water

BOD (mg/L) 256 5

TSS (mg/L) 250 5

T-N (mg/L) 35 6

NH3-N (mg/L) 25.2 1



Kubota Corporation

https://www.kubota.co.jp/product/membrane/

Example 8: Installation of MBR water treatment system in Peru

(1) Outline This project is to build a facility to treat wastewater from food process and restaurant

of livestock and marine products in Peru, South America. By treating high BOD load

wastewater with MBR, the treated water is used for greening irrigation around, and

also contributed to the improvement of the surrounding environment.


It is used for irrigation water to green surrounding areas.



Design processing capacity: 1,000m3/d

Feed water：Food processing wastewater


Model name：Toray MBR module MEMRBRAYⓇ TMR140-100S

Membrane type：Flat sheet membrane type MBR, Single deck type

Membrane material：PVDF

Membrane area：140m2 / unit

Number of unit：26 units

(6) Water quality Quality parameter MBR treated water

Temperature (℃) 25.8

BOD (mg/L) 8.6

COD-Cr (mg/L) 19.5

Electrical Conductivity (μS/cm) 5,210

E-Coli (MPN / 100mL) <1.8



Toray Co., Ltd. Water Treatment & Environmental Business Department,

Water Treatment Division, Membrane Business Unit 2

http://www.toray.jp/products/prod_005.html

Example 9: Municipal sewage plant in Saudi Arabia

(1) Outline The project was to build a sewage treatment facility in Jeddah Saudi Arabia which

had a total capacity of 60,000 m3/d, consisting of the standard sewage treatment

method plant of 30,000 m3/d and coexisting additional plant of 30,000 m3/d applying

MBR process. It contributes to improve the environmental problem of the sewage-lake

which was a long-standing concern in the region; and besides the treated water is used

for green irrigation of the eastern region.


It is used for irrigation water to green surrounding areas.

(3)_Flowsheet of reclamation process


Design capacity: 30,000m3/day

Raw water: Living wastewater

(water collection by tankers from sewage lakes)


Model name：Toray MBR module MEMRBRAYⓇ TMR140-200D

Membrane type：Flat sheet membrane type MBR, Double deck type





Temperature (℃) 34 34

BOD (mg/L) 293 6.2

COD-Cr (mg/L) 831 29

NH4-N (mg/L) 80 <1

pH (－) 7.2 6.9

Electrical Conductivity (μS/cm) 1,032 988


(8) Information,

URL




Example 10: Treatment of gray water in Australia

(1) Outline The project is to make a facility to treat living wastewater of a worker camp at a

resource mining facility on a remote island in Australia.

It was difficult to construct the wastewater treatment facility in such a remote area,

accordingly, transportable units of treatment facility components were prefabricated

in a factory and then only assembled at the construction site.

Adopting the MBR process enabled the facility to be compact and also the filtered

water to be used for miscellaneous-use water.


It is used for a miscellaneous-use water of the local facilities, and for returning water

to the source of water.



Design treatment capacity: 1,500m3/d

Feed water: Living wastewater (workers’ camp)


Model name：Toray MBR module MEMRBRAYⓇ TMR140-100S

Membrane type：Flat sheet membrane type MBR, Single deck type




(6) Water quality Quality parameter MBR treated water

BOD (mg/L) <10

TSS (mg/L) <5

T-N (mg/L) <5

T-P (mg/L) <8

Turbidity (NTU) <2

E-Coli (CFU / 100mL) <1






Example 11: Treatment of wastewater in India

(1) Outline The project is to make a facility to treat wastewater from a pharmaceutical

manufacturing plant in Ahmedabad, India. In this facility, the wastewater is treated

by a combined process of MBBR (fluid carrier bed) and MBR. The filtrated water from

MBR is reused for irrigation water and reclaimed for process water after further

treatment with RO process.


It is used for irrigation water to green the surrounding area and for miscellaneous-

use water of the local facilities.



Design treatment capacity: 1,500m3/d

Feed water: Factory wastewater (Pharmaceutical manufacturing plant )


Model name：Toray MBR module MEMRBRAYⓇ TMR140-200D

Membrane type：Flat sheet membrane type MBR, Double deck type





Turbidity (NTU) － <1

TSS (mg/L) 280 <1

BOD (mg/L) 450 3

COD (mg/L) 1,200 25


(8) Information, Toray Co., Ltd., Water Treatment & Environmental Business Department,

URL Water Treatment Division, Membrane Business Unit 2

www.toray.jp/products/prod_005.html

Example 12: Treatment for cooling tower supply water

(1) Outline Cooling tower supply water


The plant is producing high-purity grade terephthalic acid (PTA: Pure Terephthalic

Acid). Prior to introducing this treatment facility, the plant effluent after biological

treatment was discharged to the wastewater treatment plant of the industrial park.

For the purpose of reducing both the operation cost and the environmental impact

load, a wastewater reuse facility consisting of the membrane separation-activated

sludge method (Membrane Bioreactor: MBR) plus RO treatment system was

introduced.

The facility has started the operation since May 2012, and as of October 2018 MBR

and RO membranes of the treatment system have been smoothly on operation without

any replacement of the both membranes.



Incoming feed flow: 6,000m3/d

RO recovered water: 4,200m3/d

RO concentrate: 1,800m3/d

（discharging to a central sewage plant in the industrial park; COD-Cr<100mg/L）


MBR

Product code name：Mitsubishi Chemical Product STERAPORETM 5000 Series

Membrane type: hollow-fiber UF membrane

Membrane material: PVDF

Membrane area: 1,000m2/unit × 12 units ⇒ 12,000m2

(6) Water quality Quality parameter Feedwater MBR treated

water RO concentrate RO treated

water

COD-Cr (mg/L) 5,000 <30 <100 <5

SDI ( － ) － around 2 －－

TDS (mg/L) 1,500 － 4,500 30

(7) Features 1. MBR decomposes the undegradable substance which is derived from

petrochemical wastewater and achieves to reduce COD-Cr.

2. Since the brine (concentrate) of RO treatment system which is operated at 70%

recovery has less than 100mg/L of COD-Cr, it makes possible to discharge to a central

sewage plant in the industrial park.

3. Since SDI (Silt Density Index) of the MBR-treated water is around 2, the RO

treatment achieves a stable operation.

4. The suspension-type membrane module design enables the conventional activated

sludge method to convert into MBR process without pulling sludge from the existing

tank.



Mitsubishi Chemical Aqua-solutions Co., Ltd

https://www.mcas.co.jp/

Documents

Examples of membrane application for water reclamation and ...Examples of membrane application for water reclamation and reuse The Association introduces examples of membrane application