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biogas HANDBOOK Table 3.6 Operational parameters of biogas plants Parameter Symbol Unit Determination Temperature T V per day °C Measurement during operation Operational pressure P mbar Measurement during operation Capacity, throughput V m3/d; t/d Measurement Reactor volume VR m3 Determined by construction Gas quantity m3/d; m3/a Measurement during operation and conversion to Nm3 V per year Retention time (hydraulic, HRT d Calculation from operating data minimum guaranteed) MGRT Organic load kg oTS / (m3 * d) Calculation from operating data Methane concentration in biogas CH4 % Measurement during operation Specific biogas yield % Calculation from operating data Specific biogas production m3 / m3 Calculation from operating data Gross energy kWh Determination from the quantity of biogas and methane concentration Electricity production kWh Measurement at the BTTP generator Output to grid kWh Measurement after the BTTP generator Efficiency of BTTP η % Calculation from operating data Station supply thermal / electric kWh Basis of planning, afterwards measurement during operation Specific station supply thermal / kWh/m3 Input Calculation from operating data electric kWh/GV Energy production kWh Sum of energy that can be sensibly utilized. Calculation from operating data Plant efficiency η % Net energy drawn from gross energy Availability % Percentage of hours in a year in which a plant is fully functioning Utilization % Ratio of the real quantity input to the projected capacity Total investment € All expenses caused by the biogas plant Subsidies € Pre-determined Subsidy percentage % Percentage of all subsidies in relation to total investments Specific investments €/m3 reactor Only sensible when primarily manure from animal husbandry is used €/GV Specific treatment costs €/m3 Input; €/GV Calculation 29PDF Image | biogas HANDBOOK
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