Presented By: Ir Stanley LAUKingsford Environmental

Jointly Prepared By: Professor Kin Man HOIr Stanley LAU

CONTENTS

• Development & Advancement of Sewage and Sludge Treatment Technologies• Roles of University-Government-Industry in

Technologies Development & Applications•Our Experience Sharing

DEVELOPMENT & ADVANCEMENT OF SEWAGE AND SLUDGE TREATMENT

TECHNOLOGIESNEEDMore Renewable Energy, Decarbonization and

Energy Neutral (Less OPEX)Energy Recovery from Sewage and SludgeMore efficient primary solids removal for anaerobic

digestion Better PST and anaerobic digestion technologies Better design with 3-D CFD Modelling

Advanced Biological Nitrogen Removal Less OPEX and organic carbon requirementsNitritation (Short-cut of Nitrification)Autotropic Nitrification and Denitrification

DEVELOPMENT & ADVANCEMENT OF SEWAGE AND SLUDGE TREATMENT

TECHNOLOGIES (CONT’D)NEEDMore efficient Operation Less OPEX

Maximization Each Unit Operation –Simulation and Dynamic Process Modeling(Biowin) Better flow-distribution and flow-balancing - 3D CFD (Fluent, Flow 3D) Simulation Better liquid-solids separation for the grit removal, primary & secondary sedimentation

tanks - 3D CFD (Fluent, Flow 3D) Simulation with liquid-solids separation. Very compact technologies (Compact SBR, MBBR & AGS) in Hong

Kong for caverns and/or upgrading without increasing footprint. Effluent reuse

NEED more & more…

GOVERNMENT- R&D Funding- Legislation- Consultancy

UNIVERSITY- Education- R&DINDUSTRY

- Implementation- Design- Construction- Operation

UGI ROLES IN TECHNOLOGIES DEVELOPMENT & APPLICATION

OUR EXPERIENCE SHARINGIn 1997~1998, we worked together with The University of Queensland• ArchSD Contract - Pilot plant investigation of Sheung Shui Slaughterhouse House WWTP• DSD Contract – Process Design Confirmation Using Bench-Scale Systems for Shek Wu Hui STW

Upgrading

Sheung Shui Slaughterhouse Underground WWTP Bio-reactor

Bench-Scale MLE System for Upgrading of Shek Wu Shui STW

OUR EXPERIENCE SHARING (CONT’D)

In 2002~2005, we worked with DSD, HKUST & Mitsubishi Leading to Full-Scale MBRs• Membrane Bio-reactor Pilot Plant Trial for Centrate Treatment at Shatin STW• Membrane Bio-reactor Pilot Plant Trial at Shek Wu Hui STW and Stonecutters Island STW• Pilot Plant Trial of Membrane Bio-reactor and Reverse Osmosis at Shek Wu Hui STW

MBR Effluent Centrate

MBR Pilot Plant Trial for Centrate Treatment in 2002

MBR Pilot Plant Trial at Shek Wu Hui STW in 2003

Aerial View of Mui Wo MBR STW

In 2010, we worked with DSD & The University of Queensland• Full Scale Testing for Determination of Maximum Treatment Capacity at

Stanley STW with and without Bio-film Carriers

Setup of Bench-scale Reactors for Testing with and without Bio-film Carriers Stanley STW Bio-reactor

OUR EXPERIENCE SHARING (CONT’D)

University Developed CFD and IWA Activated Sludge Modelling have been extensively used in STW Flow & Process Design for DSD since 1996:

Shek Wu Hui STW in 1996 and 2009;Tai Po STW in 2007 and 2013;Sai Kung STW – Existing FSTs Performance

Evaluation in 2005;Shatin STW – MLE process and Upgrading

Existing and New FSTs in 1998 and 2006;Stonecutters Island STW – Upgrading Existing

and New CEPT Tanks with Integrated PST and Flow Distribution CFD Modelling in 2008

Shatin & Tai Po STWs – Enhance the hydraulic performance of the new effluent UV Channels in 2009

Shatin STW – Existing PSTs 3D CFD in 2016 - 17

Inlet Zone Transitional Zone

Uniform Velocity Zone

Effluent Zone

Inlet Baffles

Mid-TankBaffles

Settled Primary Sludge Protection Braffles

In-Board Launders

Lamella Plates/Tubes

OUR EXPERIENCE SHARING (CONT’D)

Flow field & SS distribution for FST

Inlet Energy Dissipating & Flocculation Baffles & Mid-Tank Baffles at Stonecutters STW

3D CFD of PST Inlet

OUR EXPERIENCE SHARING (CONT’D)

Density Current Baffle at Tai Po STW

PolyU Pilot Plants Installation In Progress at Stonecutters Island STW

OUR EXPERIENCE SHARING (CONT’D)

• Contact Angle Analysis for different biofilm carriers

• Testing of Biomass Attachment Ability on different biofilm carriers

• Sludge Digestibility Test for different sludges (AGS, MBBR, SANI, CAS)

• Maximum Specific Nitrifier Growth Rate Determination for different sludges

Maximum Specific NitrifierGrowth Rate Testing Apparatus

Gas Chromatography Mass Spectrometry

Incubator

Lab Scale Tests collaborated with PolyU for Pilot Plant Testing at Shatin STW

OUR EXPERIENCE SHARING (CONT’D)

OUR EXPERIENCE SHARING - INTERNATIONAL EXPERIENCE

• Compact SBR Technology Initiated by The University of Queensland

• Further Development and Full-Scale Implementation by Kingsford Environmental

• Very Advanced Bio-Technology• Very good sludge settle-ability• – SVI60 as low as ~50 mL/g• Incorporate Nitritation-Denitritation

• Over 300 Installations• Many large-scale STWs in SE Asia

• 2018 - Bunus STW II, 168,0000 m3/Day, Malaysia;• 2016 – LNMB STW, 75,000 m3/Day, Philippines;• 2014 – Yen So STW, 200,000 m3/Day, Vietnam;• 2005 – Jelutong STW, 270,000 m3/Day, Malaysia.

Granular Sludge Application

OUR EXPERIENCE SHARING - INTERNATIONAL EXPERIENCE

(CONT’D)

OUR EXPERIENCE SHARING - INTERNATIONAL EXPERIENCE

(CONT’D)

Nereda Pilot Test Plant at Shatin STW, Hong Kong (Testing in progress)

OUR EXPERIENCE SHARING - INTERNATIONAL EXPERIENCE

(CONT’D)

MBBR Pilot Test Plant &