SAWEA December 2006 Dammam, KSA December 2006 Dammam, KSA. ... Client: Almarai Application : Domestic Waste Capacity: 600m3/d Operational since May 2005 Location: Al Kharj,

Case Study of MBR Technologies for WW Reuse Applications

Mazen BachirTechnical Manager

ACWA Emirates LLC

SAWEA December 2006 Dammam, KSA

Submerged Membrane Bio-Reactors (SMBR)- Brief OverviewSMBR- Kubota SMBR- Common CriteriaACWa MBR Installations

Industrial: Al-Marai (and Domestic)Domestic: Palm, Al-Ansab, Greens, Ruwais

Discussion

Contents . . . .Contents . . . .

Screening &Grit Removal

Primary Settlement Secondary Treatment‘Biological’ Stage

Final Settlement Disinfection (if required)

Outfall

Conventional Treatment -> Reliance on gravity separation

SMBR SMBR –– Brief OverviewBrief OverviewOvercoming Inherent Weakness in Conventional DesignOvercoming Inherent Weakness in Conventional Design

Screening &Grit Removal

Combined Treatment Stage

Reuse

(disinfected effluent)

THE GENIUS OF SMBR -> Placing membrane units inside the activated sludge aeration tank & using the aeration for membranecleaning AND biological aeration supply

SMBR SMBR –– Brief OverviewBrief OverviewMBR 2nd Generation MBR 2nd Generation -->MBR One Step Technology>MBR One Step Technology

Submerged MBR Submerged MBR –– KUBOTA KUBOTA –– Middle East InstallationsMiddle East Installations• The Membrane…

• > 1500 installations• Operating since 1990• Title 22 approved• Membrane Life > 10 years

SMBR SMBR –– Brief OverviewBrief Overview

Submerged MBR Submerged MBR –– KUBOTA KUBOTA –– Middle East InstallationsMiddle East Installations


Submerged MBR Submerged MBR –– KUBOTA KUBOTA –– Middle East InstallationsMiddle East Installations

Screened crude sewage

Treated &disinfected

effluent

Air in

In Out

Waste Sludge


What it can offerWhat it can offer…………• Unrestricted Irrigation Quality Permeate

• < 3 mg/L BOD

• < 1 mg/L Total Suspended Solids

• < 1 mg/L Ammonia-N

• < 2.2c/100mL Total Coliforms (Title 22 approved)

• < 1/L parasite

• < 0.1 mg/L Total Phosphorus*

• < 3 mg/L Total Nitrogen*

• < 0.2 NTU Turbidity

• Ultrafiltration quality effluent with drinking water clarity


• TOLERANCE, FLOW• DISCHARGE CONSENTS, GOVERNMENTAL

REQUIREMENTS• AESTHETICS, LOCATION, and LAND AVAILABILITY.• MOBILITY, TANKER TRAFFIC, NOISE, ODOUR• POWER and CHEMICAL CONSUMPTION• QUALITY, CONTAMINANTS• TIMESCALE• RETROFIT, PHASING, MODULAR• MINIMUM PROCESS STEPS, SIMPLICITY• REDUNDANCY, TURNDOWN• SUITABLE FOR HIGH PURITY DOWNSTREAM

TREATMENT PROCESS - REUSE

SMBR SMBR –– Common CriteriaCommon Criteria

Client: Almarai

Application : Domestic Waste

Capacity: 600m3/d

Operational since May 2005

Location: Al Kharj, Saudi Arabia

Client: Almarai

Application : Industrial Waste (Dairy)

Capacity: 4000m3/d

Operational since June 2005

BA

A

B

Installation Locations Installation Locations –– KSAKSA

Case History . . . . Case History . . . . ACWAACWA

Location: Palm Jumeirah, Dubai

Client: Nahkeel / Metito


Capacity: 21,700m3/d

Operational July 2006Location: Greens,

Dubai

Client: EMAAR / Metito



Operational March 2005Location: Al Ansab,

Muscat, Oman

Client: OWSC



Operational Nov 2006

E

C

DE

C

D

Installation Locations Installation Locations –– GulfGulf


11-- Submerged MBR Submerged MBR –– AlmaraiAlmarai -- IndustrialIndustrial


• Waste from Dairy Operations, Al Kharj• Full flow 4000m3/d• COD = 12,000 kg/d• Retrofit of existing conventional plant• Available Footprint = 9m x 9m

11-- Submerged MBR Submerged MBR –– AlmaraiAlmarai -- IndustrialIndustrial


• Consent Quality TSS < 5 mg/L• Consent Quality COD < 100 mg/L• General Wash Purposes and Irrigation• Status: Operational since June 2005

22-- Submerged MBR Submerged MBR –– AlmaraiAlmarai -- DomesticDomestic


• Sewage from Accommodation, Canteens & Kitchens

• Full flow 750m3/d

33-- Submerged MBR Submerged MBR –– Palm JumeirahPalm Jumeirah


• Plant capacity = 18,000m3/d AADF• 6 separate streams of 3,000m3/d to cater for increasing

flow profile over time• Denitrification requirement (<30mg/L TN)• Stabilised sludge requirement• Nahkeel requirements

• Aesthetic, preferably ‘unseen’ plant• Minimised footprint• No odour or Noise• Minimised sludge production• Low operator requirements• Very high effluent quality for recycling onto parks

and gardens• Fire-fighting water make-up

• Underground MBR Installation

33-- Submerged MBR Submerged MBR –– Palm JumeirahPalm Jumeirah


BalancingTank Aeration / Anoxic Tank

MembraneTank

PermeateTank

ScreenArea

9m

Ground Level

Sea Level

44-- Submerged MBR Submerged MBR –– Al Al AnsabAnsab


• Will be the worlds largest submerged membrane plant, to treat a daily flow of up to 76,000m3/day

• It will treat an ultimate equivalent population of 900,000 people, or 220,000m3/d.

• Effluent Quality:• BOD < 10mg/L• TSS < 10mg/L• NH3-N < 1mg/L• NO3-N < 8mg/L• F.Coliforms < 2.2c/100mL• Viable helminth ova < 1/L• Turbidity < 2 NTU• All at 95%ile limits

44-- Submerged MBR Submerged MBR –– Al Al AnsabAnsab


*

* *

5/10 year comprehensive

BNR design for nitrification

Gravity Operations of Membranes

8no tanks, peak daily flow treatable with 7

Completely automatic chemical cleaning (press button)

Commissioning of the plant is expected in 2007

On site test rig to enable easy checking of membrane performance

Irrigation, General Wash Purposes and Civil Use (e.g. Fire-Fighting)

Membrane Tanks

Aeration Tanks

Anoxic Tanks

Distribution Chambers• Total footprint of treatment tanks is 150m * 50m

Recycle Channel

55-- Submerged MBR Submerged MBR –– The GreensThe Greens


• The MBR plant will be retro-fitted on an existing plant to increase it capacity by 4-fold, to cater to the recent expansion in the surrounding area. The plant is located next to the local school, and is also required to improve the effluent quality, to meet the more recent stringent rules and regulations.

• Upgrade of existing extended aeration plant from 3,000m3 -> 12,000m3/d

55-- Submerged MBR Submerged MBR –– The GreensThe Greens


• Surface aerators replaced with fine bubble aeration to allow increased MLSS

Existing clarifier to be converted to Anoxic Tank

Existing aeration tank to be fitted with fine bubble diffusers

Existing aeration tank to be fitted with fine bubble diffusers

New MBR Tank

New MBR Tank

New MBR Tank

Recycle

New 3mm screen

Submerged MBR Submerged MBR –– RuwaisRuwais & OGD III& OGD III


• 1,000m3/d flow from labour camp• Short term requirement

• Mobile plant required• Irrigation Reuse

• Very short construction time available

DiscussionDiscussion…………

Documents

SAWEA December 2006 Dammam, KSA December 2006 Dammam, KSA. ... Client: Almarai Application : Domestic Waste Capacity: 600m3/d Operational since May 2005 Location: Al Kharj,