CAJ | 학술논문

采用可控恒温厌氧发酵装置,选用牛粪、鸡粪、稻秆3种原料,按干物质比例0∶2∶1、0.4∶1.6∶1、0.8∶1.2∶1、1.2∶0.8∶1、1.6∶0.4∶1、2∶0∶1混合,研究了各配比在15℃、20℃、25℃、30℃下的厌氧发酵情况.结果表明:随温度升高,各配比产气速率和累积产气量均增大,15℃下发酵周期最长,其他温度对发酵周期影响无显著差异;不同配比下,累积产气量均呈先增大后减小的趋势,牛粪、鸡粪、稻秆3种原料混合的发酵效果显著好于牛粪与稻秆、鸡粪与稻秆2种原料混合的发酵效果,但配比对发酵周期无显著影响.通过模型预测,得到最优工艺组合,在发酵温度为30℃,牛粪、鸡粪与稻秆配比为1.22∶0.78∶1时,可获得最大累积产气量为28308.7mL.
채용가공항온염양발효장치,선용우분、계분、도간3충원료,안간물질비례0∶2∶1、0.4∶1.6∶1、0.8∶1.2∶1、1.2∶0.8∶1、1.6∶0.4∶1、2∶0∶1혼합,연구료각배비재15℃、20℃、25℃、30℃하적염양발효정황.결과표명:수온도승고,각배비산기속솔화루적산기량균증대,15℃하발효주기최장,기타온도대발효주기영향무현저차이;불동배비하,루적산기량균정선증대후감소적추세,우분、계분、도간3충원료혼합적발효효과현저호우우분여도간、계분여도간2충원료혼합적발효효과,단배비대발효주기무현저영향.통과모형예측,득도최우공예조합,재발효온도위30℃,우분、계분여도간배비위1.22∶0.78∶1시,가획득최대루적산기량위28308.7mL.
Fermentation of raw materials can be mixed to make up for deficiencies of the single fermentation and in different degrees to enhance the effect of fermentation of raw materials.This research was carried out in controllable constant-temperature fermentation equipment.Cow dung, chicken manure and rice straw were selected with the proportions of TS ratio(0∶2∶1,0.4∶1.6∶1,0.8∶1.2∶1,1.2∶0.8∶1,1.6∶0.4∶1,2∶0∶1) as raw materials, and biogas fermentation at temperatures of 15℃,20℃,25℃and 30℃ was studied.The main conclusions were drawn as follows: the biogas production rate and cumulative biogas yield of each proportion rose with the increase of temperature; the fermentation period was longest at 15℃, but there were no difference among the other temperatures; the cumulative biogas yield was first increased and then decreased with the change of proportion, that was fermentation of a mixture of three types of raw materials--cow dung, chicken manure and rice straw, was significantly better than the effect of the mixture of cow dung and rice straw, as well as the mixture of chicken manure and rice straw, but no significant impact on the fermentation period.The model predicted, with the optimal combination of technology, the temperature of 30℃ and the TS ratio of cow dung, chicken manure and rice straw was respectively 1.22∶0.78∶1, the cumulative biogas yield was expected to reach maximum 28308.7mL.