anaerobic digestion and biogas capability statement

Download Anaerobic Digestion and Biogas Capability Statement

Post on 23-Jul-2016




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    Anaerobic Digestion (AD) of organic waste to produce biogas presents many benefits principally generating a flexible renewable fuel thus reducing greenhouse gas emissions and returning nutrients from waste material as agricultural fertiliser. Other benefits include minimizing odour problems from handling and use of manure as fertiliser on agricultural land; minimizing leaking of Nitrogen (N) and Phosphorus (P) from agricultural land; decomposition of pathogens and weed seeds in the manure; promoting local employment; and developing the local economy. Ramboll offers a full range of services for AD, biogas upgrade, gas to grid and vehicle fuel projects from planning and project development, to design, implementation and follow-up on operation and maintenance. Project feasibility The feasibility study is a broad overview of the project requirements. We identify appropriate sources and predicted volumes and seasonality of digestate. We calculate the nutrient loading and predict biogas yield. We assess the area required for the plant and identify utility constraints or service supplies needed for the development. We determine options for gas use. And we estimate the cost (investment, O&M and life cycle cost) and potential income from the plant. Detailed design The design should outline and test the combination of technologies that are best suited for any particular project. The optimal performance of the plant in terms of energy generation has to be balanced with its performance and compliance with environmental permits and licences.

    Environmental impacts We assess planning, environ-mental and permitting issues associated with the proposed development. As part of the appraisal Ramboll will review site constraints, site history and undertake consul-tation with the relevant authorities and public bodies. Procurement process The objective of the procurement process is to ensure value for money through a high-quality contract with a reputable bidder at a competitive price. In this phase, we short list the suppliers of mechanical and electrical equipment and civil works contractors in a prequalification procedure, we prepare tender documents and we conduct a professional procurement process. Supervision of design and construction The overall objective of this phase is to ensure that the supplier fulfils the requirements of the contract. In other words, we safeguard our clients interests in relation to the supplier. In service Provisional takeover of the AD/ gas upgrade facility marks the beginning of the guarantee period, typically two years duration. In this period, we assist our clients in identifying and documenting defects and in making sure that the suppliers correct them.

    Ramboll's services Once an AD plant has been decided, Ramboll typically provides support and advice as the owner's engineer throughout the development process on relevant technical, environmental and financial matters. Our clients include project developers, utilities and contractors, and our services include:

    CONTACT Lars Erik Hgenhaven Larsen Head of department Phone +45 51618365

    Selected project references Maabjerg Bioenergy: Maabjerg Bioenergy Drift A/S, Denmark,

    630,000 tonnes/year of manure and organic food waste generating 18.4Mm biogas/year

    Novozymes: Novozymes A/S, Denmark, 1.6Mm/year waste sprit and formic acid from Novo Nordisk generating 7.2Mm biogas/year

    Cumnock WWTW: Scottish Water, UK, 67,000 tonnes/year of sewage sludge with codigestion of municipal waste generating 2.3Mm biogas/year

    Norrkiping: Norrkoping Municipality, Sweden, 20,000 tonnes/year of mixed waste

    Ha BioPark: H Biopark AS, Norway, 400,000 tonnes/year of municipal solid waste

    Ramboll's geographical AD and biogas project experience

    Outline design/feasibility Feasibility studies Due diligence Risk assessment Environmental impact

    assessment Budgeting and time

    scheduling Permitting

    Basic design Conceptual and tender

    design for anaerobic digestion process and gas utilisation including CHP and biogas upgrading

    Civil and structural design for tanks, access, buildings, etc

    Detailed design Process and instrumentation

    design Civil and structural design Project certification and

    authority approval Environmental permitting

    and licensing Procurement

    Construction Construction management

    and supervision Installation supervision

    Test & commissioning Acting on behalf of the

    developer during testing, commissioning and handing over of the project

    Post construction Follow-up on O&M Decommissioning

    Why choose Ramboll for your AD and biogas project?

    Ramboll has worked in the energy sector with an international presence for many years and is recognised as world class

    Being part of a multi-disciplinary company represents complete services within the waste business and offering a single point of contact for the client

    Has a large technical resource combining considerable experience in both Anaerobic Digestion process as well as biogas handing and use including appraisals of all upgrade technologies and delivery to gas networks or as vehicle fuel

    National and international offices.

    AD and biogas in Ramboll

    Number of specialists: 30

    Annual turnover: 1.5Million

    Years of experience: 20

    Financial ModelAvailable Feedstocks

    Agricultural Waste

    Municipal Waste

    Commercial Waste

    Energy Crops

    Waste Capture

    Plant Design/ Operation

    Gate Fee

    Digestate Use

    Gas Yield/Usage




    Sewage Sludge

    What is biogas?

    Biogas, CH4, is produced by use of anaerobic digestion of raw materials: manure, organic waste and energy crops. Sludge is digested in huge digestion tanks for several weeks at elevated temperatures with continuous rotation of the material.

    The solid fraction of the digestate, rich in Nitrogen and Phosphorus, is filtered out and the sludge is delivered back to the farmers for use as fertiliser.

    The biogas can be combusted in CHP engines or upgraded by removal of unwanted gases to concentrate the biomethane for delivery to the gas grid or as a vehicle fuel.


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