Double Membrane Biogas Storage Tank Mounted or Ground Mounted? A comparative approach

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1 Double Membrane Biogas Storage Tank Mounted or Ground Mounted? A comparative approach Biogas Asia Pacific Forum June 2014, KL Matthew Dickinson Operations Director

Established in 1907 as a traditional Steel Fabricators Merged with the Water Industry in 2003 with current

market Over 100 years of continuous trading and growth founded on excellent reputation for quality service

infrastructure Over 100 skilled personnel employed through proposals, engineering, manufacturing and site

2 Established in 1907 as a traditional Steel Fabricators Merged with the Water Industry in 2003 with current directors and owners Additional offices opened locally to the workshop in 2005 In 2008 moved into Far East market Over 100 years of continuous trading and growth founded on excellent reputation for quality service Evolving from a traditional steel fabrication background to be the leading contractor for AD and Biogas infrastructure Over 100 skilled personnel employed through proposals, engineering, manufacturing and site installations Head office near Manchester, United kingdom, a modern 15,000ft² manufacturing facility with a 10,000ft² expansion in June 2011

3 OUR MISSION KIRK GROUP aim to be recognised as the leading global specialist, design & build partner for Anaerobic Digestion & Biogas infrastructure; working in partnership with industries leading specialist technology providers to deliver projects utilising biowaste for the production of biogas as a renewable energy source. We are committed to the promotion and development of AD & Biogas technology to reduce the effects of climate change, eliminate useful waste being diverted to landfill, promote energy security and secure existing fossil fuel resources. We recognise the huge range of benefits (environmental, social and economic) that biogas production & utilisation can bring and are committed to being instrumental in delivering a safe and secure renewable energy network for future generations

4 GLOBAL REFERENCES Project Installations Europe, UK, North America, Australasia, & Asia

5 PRODUCT PORTFOLIO GLASS COATED STEEL TANKS EPOXY COATED STEEL TANKS ACCESS STEELWORK CONCRETE TANKS BIOGAS STORAGE

6 CSTR - Digester designs

7 BASIC PRINCIPLES OF OPERATION The outer membrane is designed to resist external wind forces AIR BLOWER

8 BASIC PRINCIPLES OF OPERATION When gas production exceeds the rate of use, the internal membrane inflates Air Blower Gas in Gas out

9 BASIC PRINCIPLES OF OPERATION When gas usage exceeds the rate of production, the internal membrane deflates. Air Blower Gas in Gas out

10 BIODOME AIR EXHAUST CONNECTION SYSTEM ENGINEERING OVERVIEW EXTERNAL VIEW ULTRASONIC DETECTOR AIR INLET CONNECTION Y-PIECE AIR BLOWERS NON RETURN VALVE

11 BIODOME SYSTEM ENGINEERING OVERVIEW SECTIONAL VIEW OUTER MEMBRANE INNER MEMBRANE VENT STACK OVER PRESSURE VALVE BASE MEMBRANE CLAMPING RAIL CLAMPING RINGS

12 BIODOME SYSTEM ENGINEERING OVERVIEW The outer membrane is a permanently inflated structure. The membrane is inflated by the use of the electrically operated blowers.

production, the internal membrane falls The air pressure

13 When gas production exceeds the rate of use, the internal membrane rises When gas usage exceeds the rate of production, the internal membrane falls The air pressure inside the air compartment maintains the system pressure

14 The blowers ensure that the membrane remains fully inflated under all conditions of gas filling and consumption. This requires the blower to be rated at 140% greater throughput than the maximum gas consumption rate of the plant. Air Exhaust Nozzle Clamping Angles Pressure Regulating Valve Tank Top Angles

15 Viewing Port External Membrane Air Inlet Nozzle Y Piece Over- / Under- Pressure Relief Valve Air Support Blowers

16 MEMBRANE MANUFACTURE The membrane form is achieved by precisely cutting the textile roll to accurate design patterns. These patterns are based on over 20 years experience of the behaviour of the textile under pressurised conditions, and have become a very specialised shape to ensure even stress distribution throughout the structure.

TYPICAL AD PLANT SCHEMATIC The ground based BIODOME is placed on a concrete base with pipe work cast into the base HEAT / POWER GFS Digester with Fixed Roof Digestion & Biogas production BIODOME Gas

17 TYPICAL AD PLANT SCHEMATIC The ground based BIODOME is placed on a concrete base with pipe work cast into the base HEAT / POWER GFS Digester with Fixed Roof Digestion & Biogas production BIODOME Gas Holder Biogas Buffer/Storage FLARE CHP ENGINE The gas holder must be installed in-line between the digester and the gas consumption equipment; this ensures a constant flow of fresh biogas through the Gas Holder and eliminates the risk of biogas stratification.

BIODOME AD PLANT SCHEMATIC Placing our BIODOME on top of the digester provides major benefits such as; No concrete base required, no additional pipe work, space saving and no steel roof on tank.

18 BIODOME AD PLANT SCHEMATIC Placing our BIODOME on top of the digester provides major benefits such as; No concrete base required, no additional pipe work, space saving and no steel roof on tank. Generally this option will save a significant amount of capital costs. HEAT / POWER The BIODOME is situated directly above the gas production to provide a buffer storage volume between production and usage.

19 The gas holder must be installed in-line between the digester and the gas consumption equipment, ensuring a constant flow of fresh biogas through the gas holder and eliminates the risk of biogas stratification. Digester Distance Pressure drop across each section of the plant is directly related to the size and length of the pipework, number of valves and fittings through which the gas must flow. The BIODOME is the pressure input to the gas system, resulting in the digester pressure being higher and all downstream equipment being lower.

BENEFITS OF DOUBLE MEMBRANE BIOGAS STORAGE SYSTEMS Enhanced safety with biogas storage with double layer of same-strength membrane Positive header pressure acting on inner membrane allows easy

20 BENEFITS OF DOUBLE MEMBRANE BIOGAS STORAGE SYSTEMS Enhanced safety with biogas storage with double layer of same-strength membrane Positive header pressure acting on inner membrane allows easy drawing of biogas, eliminating vacuum situation in fixed roof applications System equipped with back-up blowers, methane gas detector & over/under pressure relief valve to ensure system safety Long lifespan with UV resistance, H2S resistance & anti-static coating

21 BENEFITS OF INTEGRATED SYSTEMS Significantly reduced CAPEX price No steel roof No extra foundations No extra pipework No separate gas buffer Further reduced project footprint Maintain operational performance Biogas buffer for gen-sets Low maintenance Long product lifespan Greater flexibility with design

22 BIODOME GAS HOLDERS Available as stand alone system or rim mounted onto existing storage / digestion tanks Each system specifically designed to meet process and environmental requirements Rapid on-site installation using specially trained teams

23 BIODOME MEMBRANE SPECIFICATIONS & QUALITY The membrane is designed to DIN codes for air supported structures. Both the inner & outer membrane have UV protection and has an additional anti-static coating. The coating is also a treatment for protection against sulphur found in biogas. The membrane is specified for a low methane permeability of 165ml/m2/day/bar pressure. BIODOME uses the strongest textile membrane currently commercially available. We supply the same strength textile fabric for both inner & outer membrane. Total traceability is maintained for every metre of membrane weld for our quality records.

INNOVATION AND SPECIAL PROJECTS Hogsmill

Concrete Settlement Tanks for conversion

24 INNOVATION AND SPECIAL PROJECTS Hogsmill STW Project Details: Supply of 2-off Top Mounted BIODOME Double Membrane Gas Holders Installed on 2-Off existing Ø30m Concrete Settlement Tanks for conversion to digesters. Operating pressure 25mbar and safety blow-off pressure of 30mbar. Height restriction of storage above tank is 6m.

Beddington STW Project Details: Supply and

Solution is to replace a floating steel roof

25 Beddington STW Project Details: Supply and installation of a Top Mounted BIODOME Double Membrane Gas Holder onto an existing concrete tank 22mØ. Solution is to replace a floating steel roof and must incorporate 2 Stainless Steel platforms for access inside the tank

DOUBLE MEMBRANE BIOGAS HOLDER COVERS Dual cover for in-ground lagoons or ponds Traditionally single membrane covers without rain drainage, resulting in pooling & also prone to leakage and accidents

26 DOUBLE MEMBRANE BIOGAS HOLDER COVERS Dual cover for in-ground lagoons or ponds Traditionally single membrane covers without rain drainage, resulting in pooling & also prone to leakage and accidents Double membrane solution allows safety & operational advantages for in-ground ponds, like the above-tank application Perfect for existing lagoons which are now under regulation pressures to cover & capture methane

TOP MOUNTED BIOGAS HOLDER ROOFS Dual-purpose of roof cover & biogas storage Eliminating need for fixed steel roof, lowering CAPEX Operational advantages with positive header pressure for

27 TOP MOUNTED BIOGAS HOLDER ROOFS Dual-purpose of roof cover & biogas storage Eliminating need for fixed steel roof, lowering CAPEX Operational advantages with positive header pressure for downstream usage Flexible to be increased for extra storage space UV-resistant, H2S resistant & can withstand elements (high wind speed & snow loads) Suitable for retrofitting of existing tanks

28 WORLD GALLERY

29 WORLD GALLERY

30 THANK YOU & CONTACT US: Enquiries: BIODOME ASIA A Office Tower Empire Subang Jalan SS16/1, Subang Jaya Selangor, Malaysia

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