Best practice example. bio - methane gas grid injection plant. GreenGasGrids

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1 Best practice example of an existing bio - methane gas grid injection plant IEE project GreenGasGrids The sole responsibility for the content of this publication lies with the authors. It does not necessarily reflect the opinion of the European Union. Neither the EACI nor the European Commission are responsible for any use that may be made of the information contained therein.

2 General information: Location of the biogas plant: Wr.Neustadt, Lower Austria Feedstock: Liquid & hygienisation free Upgrading technology: Gas permeation / Membrane Technology Bio-methane gas grid injection: yes (120 Nm³/h) Commissioning date: April 2011 Operator: EVN in cooperation with AWVWNS Located at the wastewater treatment plant of Abwasserverband Wiener Neustadt Süd, the facility produces around 250 Nm 3 /h raw gas - using sewage sludge as substrate. The produced biogas is used as fuel for electricity generation and in order to increase the efficiency of the biogas plant the waste heat is used in the waste water treatment process as well, thus both products strongly contribute to the goal of achieving energy autarky. Abwasserverband Wiener Neustadt Süd does not need the entire but just part of the capacity of the biogas facility for their own needs. Therefore - based on the approval in compliance with the waste management act the in addition produced biogas volume (200Nm 3 /h), using liquid co-ferments, are in cooperation with EVN (among others the operator of the gas distribution grid) - upgraded to bio-methan and injected into the gas distribution grid. Page 2 of 2

3 Waste water treatment plant before Kickoff of the project Membrane system, Container B Page 3 of 3

4 Entire installation: analysis and pretreatment/ upgrading unit/ offgas burner Overview Page 4 of 4

5 The Biogas-Upgrading Plant is designed as three Container Unit. Container A : Biogas Preatreatment Container B : Biogas Upgrading Unit by Membranes Container C : Offgas Burner to avoid any exhaust of CH4 into the atmosphere The unit can be continuously adjusted in terms of: - Purity of Productgas % of CH4 - Injection capacity in Nm3/h - Purity of Offgas % CH4 Technical data Type of biogas plant digestion tanks ~ m³ capacity; with gas-injection Type and annual amount of feedstock (planned of real figures) - Start of biogas production 1962 (waste water treatment plant) and now additional feedstock Start of bio-methane production 1962 (waste water treatment plant) Distance to gas grid 2,3km gas pipeline Operating pressure of the gas grid 2,5-4bar Main technical installations (kind and relevance for utilization pathway(s)) - How are the digesters heated? Heat loss from cogeneration unit Type of upgrading technology Gas permeation / Membranes Annual raw gas and product gas production (planned and real figures / observation period) Annual biogas production: ~ 1, m³ biogas for upgrading to bio-methane Methane content of biogas and bio-methane ~ % CH4 bio-methane: & > 98,5 % Which gas components measured at what intervals? CH4, CO2, O2, N2, H2S, What is the specific electricity and heat consumption of the upgrading plant (kwh per MWh bio-methane) Ø 0,04 kwh / kwh Bio-methane in the gas grid; no heat; Type of gas treatment. Chemical scrubber for Sulfur, gas drying, active charcoal for possible byproducts like siloxanes Expected annual bio-methane amount injected into the gas grid. (planned and real figures / observation period) ~ 8, kwh/a Economic data Total investment costs (up to the injection points) 1.5 mio Euros What is the level of the revenues for the different products (are there any fixed prices granted for what period)? - Who owns which installations along the value chain? biogas production including desulfurization & gas storage AWVWNS upgrading plant, pipeline and gas grid injection - EVN Page 5 of 5

6 What does the cost burden sharing look like (if any).- How could you finance that project? - What investment subsidies were granted for what (upstream/downstream)? Subsidies for the bio-methane-pipeline only are expected Are there any indirect financial subsidies that make the implemented business model attractive. Business model What are the drivers that make the project attractive? long range projectable, legal and economical basic conditions; a developing market; political will and decisions; What products are sold to whom, where do revenues come from? heat supply; gas products for house holds and mobility are planned; Who are the most important project partners? EVN & AWVWNS Why are there different ownerships along the value chain (up to the injection or final energy use point, respectively), if any? Competences of partners are used optimally; core businesses; What is the legal form of that enterprise and why did you go for that form? - Is there any tracking / certification system applied to guarantee transparency, avoid double counting, show sustainability of the products to business clients. Yes currently a TÜV-certification for the whole product chain from production to consumer; soon to come: official biogas register What marketing activities are done? Activities are in development, mainly for household products (tariffs) Main lessons learned What do you think makes your project a successful one? Combination of competences and focus on core competences; problem solving competences; What would you do/make in another way with respect to the experience you have made. nothing Are there any issues that are real barriers to replication of such projects or a smooth market development, respectively? Many because every project is extremely individual: gas production, technical requirements, gas grid infrastructure, legal aspects; What would you recommend new plant operators and project developers to concentrate on to develop such a project in a successful way. Data source Are the figures provided by the builder or by the operator or an independent third party? operator Page 6 of 6