| Summary: | 碩士 === 逢甲大學 === 綠色能源科技碩士學位學程 === 107 === Under the crisis of mitigating climate change and energy scarcity, this study advocates the application of Net zero energy building (NZEB) for building energy-saving design and renewable energy generation. And using Energy use intensity (EII) for the measurement unit of the overall comprehensive index of building energy consumption, the “optimal performance percentage” is used as the optimization method to continuously improve the design and analysis, which is in line with energy-saving performance.
In most domestic pig farmers, the treatment of pig-raising wastewater is treated with early three-stage wastewater, but the effect is not good. The biggest problem is that the traditional anaerobic tank lacks agitation, causing most of the sludge to settle at the bottom, followed by The gas after anaerobic fermentation can’t be used directly because the sulfur contained in these biogas can’t be directly burned by the generator. This study uses an anaerobic fermentation system, which includes a large anaerobic fermentation tank, a sand filter, a desulfurization system, and a generator. The system can solve the problem of pig wastewater and can be used as a renewable energy source. In this study, the five-stage method is used to distinguish the system before setting, during the system setting, and after setting up the system. The system adds 600 kg of pig manure solids and the system's final stable period every week. In the last three stages, the maximum methane production rate (MPR) was 0.18, 0.39 and 0.39 m3/m3-d, and the maximum biogas production rate (BPR) was 0.25, 0.51 and 0.57 m3/m3-d.
The pig farm in this study consumed 37,345 kWh/y, but after optimization by high-performance buildings, it was 28,195 kWh/y. The anaerobic fermentation experiment calculated that the wastewater generated by the farm could generate 33,756 kWh/y. Therefore, the energy balance calculation: 33,756 kWh / y ≥ 28,195 kWh / y, so this study demonstrates the feasibility of the calculation and design of the net zero-energy farm.
Key words: net zero energy-consuming buildings, pig wastewater, anaerobic fermentation capacity, simulation
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