The KOMPOFERM concepts.

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1 The KOMPOFERM concepts. Innovative biogas plants for energy production from bio-waste and other organic wastes. With the Kompoferm dry fermentation concepts Eggersmann Anlagenbau offers efficient, modular systems for the productive extraction of biogas from S to XXL. Solutions of

2 KOMPOFERM - the established plant concept. The initial situation The international waste management industry works with highly efficient technologies and complex plants. In recent years, the requirements placed on these plants have become more complex. At the same time, the awareness of regenerative energies has grown considerably. We have developed a concept which reduces operating costs and improves performance: the KOMPOFERM biogas plants offer the possibility of modern and efficient biogas extraction utilising the technologies of dry fermentation. The principle has proven itself: in the KOMPOFERM dry fermentation plant, the fermentation of solid substrates (e.g. biowaste, garden waste, biogenic fractions from residual waste treatment) produces biogas at a uniformly high level. Maximum gas production, with a high methane content, is achieved with low energy requirements. This means: low investment costs high biogas yield. 2_3

3 KOMPOFERM :» highest quality standards 5 4» minimal susceptance to failure» continuous production» highly cost-effective Air handling Biogas Percolate Exhaust air Room for pumps, blowers, compressors Biogas storage Fermenter tunnel with gastight gate Accessible pipework channel Sandtrap and pumps Percolate fermenter» simple operation» high safety standards» modular design S - XXL The KOMPOFERM -dry fermentation plant in proven design Dry fermentation is a well controlled biologically stable process. Based on the utilisation of the KOMPOFERM process, Eggersmann plants are known for their outstanding cost-effectiveness and simple operation. Our decades of experience and continuous further development of these processes have convinced customers around the world of the quality of our solutions, both for the expansion of conventional plants as well as for new installations. The efficient operation KOMPOFERM plants are distinguished by their reliability, low investment and operating costs, and outstanding efficiency: only a small part of the energy derived flows into the own energy consumption of the plants. Moreover, the process results in digestates with very good structural properties and comparatively low water content, ideally suited for aerobic conditioning and further treatment into compost / fertilizer. KOMPOFERM plants thus set standards for biogas and compost extraction. Your advantages:» high biogas production» well drained digestates» very low plant energy requirements» maximum system availability» high level of automation» low investement costs» short construction period Biomass Biogas Compost / fertiliser Marketing

4 The KOMPOFERM plus concept. The next generation of biogas plant technology. reductions in energy requirements Consumed Energy Derived Increased biogas production The expanded PLUS-concept provides additional benefits With the intelligent design of the percolate cycle, our dry fermentation plants operate with particularly high efficiency. Eggersmann Anlagenbau, as one of Germany s leading innovators, has contributed decisively to the development of this process. Developers and engineers with vast practical insight have now further optimised the proven KOMPOFERM process and again improved its efficiency. The double use of valuable thermal energy supports the fermentation process. The innovative layout shortens the percolate path to a minimum and significantly reduces the area required. Digestate Closed loop process (percolate) 4_5

5 Room for pumps, blowers, compressors Biogas storage Fermenter tunnel with gastight gate Accessible pipework channel Sandtrap and pumps Percolate fermenter Lean gas flare Air handling Biogas Percolate Exhaust air 5 KOMPOFERM plus:» optimal utilisation of heat Enhanced efficiency by the intelligent utilisation of heat By contrast with the established KOMPOFERM design, with KOMPOFERM plus the percolate reservoir is integrated in the plant concept. The percolate cycles are shortened and energy losses reduced to a minimum. Utilising the heat emitted from the percolate reservoirs allows the production of gas to set in much sooner. The fermentation process is optimised by the constant heat influx, increasing the amount of gas production - two factors for even greater cost-effectiveness. The compact design makes this innovative process an attractive alternative with minimal area requirements. Decisive arguments The use of KOMPOFERM plants brings many valuable advantages. For the choice of the optimal plant, several decision factors play an important role. Therefore, for example, the existing site conditions, such as the ground works, the available space plus the level of automation etc., must be considered in this decision. Both plants offer convincing high-value material quality and high efficiency. Another advantage arises from the particularly economical system design and the modular structure of KOMPOFERM.» accelerated fermentation process» reduced start-up phases» shortened cycle paths» minimal area requirements» maximum efficiencies» modular design S - XXL Additional advantages:» increased biogas production» further reductions in energy requirements» low investment costs» further minimisation of maintenance and operating costs» possibility of thermophilic operation with hygienised end products according to BioAbfV.» partially redundant system» possibility fo automatic filling

6 Process description KOMPOFERM plus. Biowaste Supply air Optional preparation Combined poor gas and biogas Exhaust air Exhaust air Biowaste Biowaste Supply air Percolate supply Dry fermenter Blower Pump station Dry fermenter Optional conditioning maturation Gas storage Compost Digestate Percolate discharge Condensate Sand trap Heat Percolate supply Percolate fermenter Heat Process heat Surplus water CHP Power Heat Surplus water The KOMPOFERM plus-dry fermentation process is particularly advantageous for the energetic use of solid and stackable biomass (e. g. organic waste, garden waste, biogenic fractions of residual waste), and is particularly environmentally friendly, since is no discharge of greenhouse gas into the atmosphere during start-up and shut-down operations. Pre-treatment Biowastes can be pre-treated through initial screening ( mm) or directly processed if it seems to be adequate. Intensive comminution and addition of liquid is not necessary as the substrate must not be transformed in a pumpable status. Start-up operation The filling of the fermenter tunnel is carried out with a wheel loader. The addition of the final products of treatment as a seeding sludge is only required up to a maximum of 10%. Within the first hours the material is aerobically pre-treated. The required mesophile process temperature is quickly achieved by aerobic self-heating and the drolytic degradation of the biomass is already initiated. Fermentation The actual digestion phase starts with disconnecting the aeration and a simultaneous inoculation with anaerobic biology through irrigation with pre-heated percolate. The organic acids from hydrolysis are effectively dissolved in the drainage liquid, discharged into the percolate fermenter and here immediately transformed through the permanently available methanogenous biology. Thus any acidification that would impair the process is success fully prevented. After a few days, the methane forming biology is also established in the fermenter tunnel, and the main gas formation now happens here. The gas mixture generated during the early fermentation phase can already be delivered to the gas storage, as all of the dry fermenters are operated in a temporarily staggered batch mode. The large-scale biogas storage balances completely the discontinuous biogas production of the individual fermenters. The anaerobic process is bound to high moisture contents in the substrate and an intensive exchange of the metabolic products within the plant components. For this purpose the percolate is evenly and with a high rate irrigated over the substrate by means of a sprinkler system. The effective discharge of the percolate is guaranteed by means of the floor gradient, drainage channels and hole-grid segments which are installed at the inner walls of the fermenter. Accumulation zones are prevented through the additional horizontal drainage and a current flow-through of the pile with a high amount of the percolate is assured. To optimize the drainage performance, there is the possibility to rinse the substrate via a sidestream channel compressor and the ventilation strands of the spigot floor with biogas. The closed loop operation by means of the heated percolate fermenter also guarantees that the necessa- 6_7

7 ry process temperature is maintained. A problematic sedimentation of mineral fines in the percolate fermenter is impossible, as the self filtering function of the substrate is used and in addition an effective also heated sand trap is installed. Process termination After three weeks of retention time eases the gas production in the dry fermenter tunnel. At this time the digestion process is directly stopped by the termination of percolation and intensive aeration (oxygen supply). An efficient rotary piston blower is used for necessary high-pressure aeration. By this means the biogas contained in the pore volume of the substrate is reliably expelled. The exhaust air is led to the gas storage until the methane threshold value is initially achieved, and then switched to weak gas combustion. After that the digestate will be discharged by means of a wheel loader from the fermenter tunnel. In order to adhere to the worker s protection rules and protection from emissions the fermenters are de-aerated with a three-fold air exchange rate during the filling and discharging processes and the exhaust air led through a biofilter. The final product of the treatment is a well dehydrated digestate which can suitably be conditioned in stackable consistency, further conditioned by the rotting process, and treated up to the point of marketable compost. CH 4 content [%] Biogas yield CH 4 content in the biogas of one fermenter Process duration [days] Continous biogas yield in batch process Biogas yield in 8 fermenters Biogasertrag in 8 Fermentern Process duration High-value process and operational technology High-class coating on the inside of the gas exchange areas with epoxy resin layers Complete heat insulation of the entire system Spacious inside height of the fermenters for comfortable operation with wheel loaders Efficient and gentle heat transfer via the percolate Construction conform to German water protection regulation VAwS with internally lined and leakage -monitored containers for the percolate Compact building structure design and machinery equipped with shortest pipeline connections All of the pipelines above ground (biogas, percolate, condensate, exhaust air) in stainless steel Extensive measuring technology for process monitoring and operational safety according to industry standards (biogas analysis, multiplex system, hydrostatic fermenter pressure, temperature, gate sealing pressure, ph value, level indication in the percolate fermenter, percolate funnel and gas storage, IDM-percolate quantity measuring) Up-to-date plant control (Siemens S7, profi bus, process control system with PC-visualisation) Comprehensive process documentation for evaluation and filing of the process monitoring Convincing safety concept and external expert acceptance (Section 29a of the Federal Noise Protection Law and Operating Safety Ordinance) Almost complete minimization of methane loss No discharge of greenhouse gases into the atmosphere» Aerobic add on system (aerated floor, rotary piston blower) during start-up and shut down phase» only up to 10% digestate feedback required» effective and reliable drainage system» optimized drainage with biogas flushing through aeration floor optimal texture of the digestate for aerobe conditioning Example of a KOMPOFERM plus-plant for biowaste Annual capacity Reinjection of inoculation material Process period t / a only up to 10 % 21 days Dry fermenter 6 pieces (25 m x 5,5 m) Percolate fermenter volume 800 m 3 Gas storage volume 630 m 3 Biogas yield Electricity yield, gross Heat yield, gross Digestate for further processing Waste water amount 1,8 Mio. m 3 / a 3,75 Mio. kwh / a 4,2 Mio. kwh / a t / a approx m 3 / a

8 Products and solutions for waste management The comprehensive, modular Waste Transforming System for mechanicalbiological waste treatment. The first semi-mobile dry fermentation plant. A container construction method for small quantities of substrate. Plants and machinery for professional composting, soil remediation and waste treatment www. eco.com KOMPOFERM brochure EN 04/2015 We look forward to hearing from you. Eggersmann Anlagenbau Kompoferm GmbH, Germany Head office Branch office Branch office Internet Max-Planck-Straße 15 Carl-Zeiss-Straße 6 8 Hohmannstraße Marienfeld Bad Oeynhausen Leipzig info@f-e.de Tel.: Tel.: Tel.: Fax: Fax: Fax: info@kompoferm.de