溫和水熱預(yù)處理促進(jìn)秸稈產(chǎn)沼氣的條件優(yōu)化研究
發(fā)布時間：2018-10-19 19:12
【摘要】：以水稻秸稈為原料,在前期單因素試驗(yàn)基礎(chǔ)上,通過正交試驗(yàn)研究不同水熱預(yù)處理?xiàng)l件對稻秸理化特性及產(chǎn)沼氣效果的影響.結(jié)果表明,預(yù)浸時間、初始含水率和熱處理時間3個因素對稻秸厭氧發(fā)酵20d累積TS產(chǎn)氣率的影響程度各不相同,各因素對厭氧發(fā)酵累積TS產(chǎn)氣率的影響大小順序?yàn)槌跏己暑A(yù)浸時間熱處理時間;得出的最佳水熱預(yù)處理?xiàng)l件為:初始含水率為55%,預(yù)浸時間為2h,熱處理時間為6h;與處理CK相比,最佳預(yù)處理?xiàng)l件下稻秸20d容積產(chǎn)氣率提高29.79%,產(chǎn)氣量達(dá)總產(chǎn)氣量60%和80%時間可提前5d;結(jié)合預(yù)處理前后稻秸理化特性變化規(guī)律分析,表明溫和水熱預(yù)處理促進(jìn)了纖維素和半纖維素的降解溶出,并促使其更多轉(zhuǎn)化為揮發(fā)性脂肪酸(VFA),從而有利于稻秸快速產(chǎn)沼氣.
[Abstract]:The effects of different water and heat pretreatment conditions on the physicochemical properties and biogas production of rice straw were studied by orthogonal experiment on the basis of single factor experiment. The results showed that three factors, prepreg time, initial moisture content and heat treatment time, had different effects on the cumulative TS gas production rate for 20 days of anaerobic fermentation of rice straw. The influence of various factors on the cumulative TS gas production rate of anaerobic fermentation was in the order of initial moisture content prepreg time heat treatment time. The optimum conditions of hydrothermal pretreatment are as follows: the initial moisture content is 55, the prepreg time is 2 hours, and the heat treatment time is 6 h. Under the optimum pretreatment condition, the volumetric gas production rate of rice straw increased 29.79% in 20 days, and the time of gas production reached 60% and 80% of the total gas yield could be advanced 5 days, and the changes of physicochemical characteristics of rice straw were analyzed. The results showed that mild hydrothermal pretreatment promoted the degradation and dissolution of cellulose and hemicellulose and promoted its conversion to volatile fatty acid (VFA), which was beneficial to the rapid production of biogas from rice straw.
【作者單位】： 江蘇省農(nóng)業(yè)科學(xué)院農(nóng)業(yè)資源與環(huán)境研究所農(nóng)業(yè)部農(nóng)村可再生能源開發(fā)利用華東科學(xué)觀測實(shí)驗(yàn)站;
【基金】：農(nóng)業(yè)部公益性行業(yè)專項(xiàng)(201503135-17)
【分類號】：S216.4;X712
本文編號：2282104
[Abstract]:The effects of different water and heat pretreatment conditions on the physicochemical properties and biogas production of rice straw were studied by orthogonal experiment on the basis of single factor experiment. The results showed that three factors, prepreg time, initial moisture content and heat treatment time, had different effects on the cumulative TS gas production rate for 20 days of anaerobic fermentation of rice straw. The influence of various factors on the cumulative TS gas production rate of anaerobic fermentation was in the order of initial moisture content prepreg time heat treatment time. The optimum conditions of hydrothermal pretreatment are as follows: the initial moisture content is 55, the prepreg time is 2 hours, and the heat treatment time is 6 h. Under the optimum pretreatment condition, the volumetric gas production rate of rice straw increased 29.79% in 20 days, and the time of gas production reached 60% and 80% of the total gas yield could be advanced 5 days, and the changes of physicochemical characteristics of rice straw were analyzed. The results showed that mild hydrothermal pretreatment promoted the degradation and dissolution of cellulose and hemicellulose and promoted its conversion to volatile fatty acid (VFA), which was beneficial to the rapid production of biogas from rice straw.
【作者單位】： 江蘇省農(nóng)業(yè)科學(xué)院農(nóng)業(yè)資源與環(huán)境研究所農(nóng)業(yè)部農(nóng)村可再生能源開發(fā)利用華東科學(xué)觀測實(shí)驗(yàn)站;
【基金】：農(nóng)業(yè)部公益性行業(yè)專項(xiàng)(201503135-17)
【分類號】：S216.4;X712
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