| With energy and environmental issues become increasingly prominent, since the 21 century, the world is facing energy crisis and growing environmental problems, and biogas is a renewable pollution-free high-quality fuel, it can replace the original straw and coal and other energy material. Manure, industrial organic wastewater, sewage, garbage and other organic biomass waste biogas technology can be completely harmless digestion, biogas technology is currently in China to develop one of four key renewable energy projects. Therefore, the rational use of biomass resources, the development of biogas industry, can ease China’s energy supply and demand gap, but also can effectively reduce environmental pollution, these features make biogas technology has important practical significance.In this paper, the combination of theoretical analysis and experimental methods for study of crops-cucumber vines prepared biogas fermentation equipment, including equipment selection, design, and validation equipment rationality, raw material consumption calculations and Ralstonia crushing ratio, dosing rate typical factors on anaerobic fermentation reactions.This paper has studied biogas technology related basic processes, including the process of anaerobic degradation of factors influence the reaction summarized and analyzed; cucumber vines selected as anaerobic fermentation biogas feedstock, the feasibility and application analytical on.The main results and conclusions are as follows:(1) In this paper, the raw material pretreatment elaborated in terms of energy crops and broken relevance,using mathematical tools- characterized by particle size, particle formation after crushing crops were characterized Theoretical calculations show that: in the same crushing force case, the particle size distribution of less than 2mm cucumber vines, which accounted for 45% of the mass fraction, broken energy accounted for only 42.5%, it is possible according to the actual situation can reduce energy consumption broken broken manner.(2) design package anaerobic fermentation experiment apparatus comprising an anaerobic reactor tank,cylindrical tank wall thickness is determined, as well as select form a stirrer and a motor power connector jacket and barrel, the wall thickness of the jacket OK; while taking advantage of major energy-consuming devices, the energy transfer calculation, and then the temperature sensor accuracy of time from the perspective of theoretical analysis, verification anaerobic fermentation reactor is reasonable.(3) in the usual crops- cucumber vines as raw material by temperature(35 ℃) conditions, continuous feeding of the way, a study of the impact on its fresh cucumber vines gas properties, namely cucumber vine cucumber vine Ralstonia match yield performance of gas while extracting residual sludge reactor Ralstonia different than after, with an electron microscope to observe colonies of anaerobic microorganisms, the further explanation of the total amount of fresh cucumber vines anaerobic fermentation and gas production Effect of the amount of methane gas produced.By adding active sludge different dosing rate anaerobic fermentation reaction studied under the temperature conditions, the total amount of the reaction process by gas, the amount of methane gas, PH and other data, analysis dosing rate anaerobic fermentation gas impact study showed that: when the dosing rate of7%, and enhance the daily gas production has more significant effect, and continue to improve when dosing rate, the effect is very obvious, but in the subsequent reaction, can continue to maintain a more high average daily gas production; when dosing was 10%, the fluctuation range of the reactor PH decreased from 7.32 to7.13, the fermentor is always in a weak base state, the stability of p H values than the other two dosing rate high, can not by adding a weakly basic substance to adjust the p H value and the dosing rates were 5 and 7% in the first experiment p H 11 Tiancheng weak acid, this time is not conducive to anaerobic fermentation reaction. |
