【摘要】：為實現(xiàn)糞秸清潔化、高效化厭氧產(chǎn)甲烷,試驗在自制的纖維質(zhì)物料高含固率連續(xù)產(chǎn)甲烷反應(yīng)器中,以油菜秸稈和牛糞為原料,在中溫條件(37℃±1℃)下研究了2個攪拌頻率(8 r·min~(-1)和35 r·min~(-1))對該反應(yīng)器啟動階段產(chǎn)甲烷效率的影響。結(jié)果表明,在僅添加牛糞和出料回填的條件下,低頻率攪拌反應(yīng)器(R1)和高頻率攪拌反應(yīng)器(R2)均能在5 d后穩(wěn)定產(chǎn)氣,產(chǎn)甲烷效率沒有顯著差異。在牛糞和秸稈混合進(jìn)料、含固率分別為10%和15%的條件下,低攪拌頻率會提高反應(yīng)器甲烷產(chǎn)率,且會使物料在反應(yīng)器內(nèi)產(chǎn)生更加明顯的空間異質(zhì)性,反應(yīng)器上部VFAs濃度顯著高于下部。當(dāng)TS=10%,進(jìn)料VS為0.46 kg·d~(-1)時,R1的平均比甲烷產(chǎn)率和容積甲烷產(chǎn)分別為123.54 L·kg~(-1)VS_(added)和1.13 L·d~(-1),比R2高11.08%和10.78%;當(dāng)TS=15%,進(jìn)料VS為0.69 kg·d~(-1)時,R1的平均特殊甲烷產(chǎn)率和容積甲烷產(chǎn)率分別為94.84 L·kg~(-1)VS_(added)和1.31 L·d~(-1),比R2高11.68%和11.82%。上述研究結(jié)果為該反應(yīng)器利用糞秸在高含固率條件下實現(xiàn)快速啟動和高效產(chǎn)甲烷提供了理論依據(jù)和工藝參數(shù)。
[Abstract]:In order to realize the clean and efficient anaerobic methanogenesis of manure straw, rape straw and cow dung were used as raw materials in a self-made continuous methane production reactor with high solid content of fibrous materials. The effects of two stirring frequencies (8 r 路min ~ (- 1) and 35 r 路min ~ (- 1) on the methane production efficiency in the start-up stage of the reactor were studied at medium temperature (37 鈩，

本文編號：2437534