绿氧与NaOH组合处理对玉米秸厌氧消化性能影响

Anaerobic biogasification performance of corn stalk pretreated by a combination of green oxygen and NaOH

用绿氧(GO)与NaOH组合对玉米秸秆进行预处理,研究了不同GO添加量对玉米秸厌氧消化产气性能的影响。结果表明:绿氧与NaOH组合预处理可使产气高峰提前,在2%NaOH中分别添加0.05%GO(1#)和0.1%GO(2#)的预处理样品T80时间为31 d和34 d,比2%NaOH预处理样品(3#)分别缩短了5 d和2 d;总产气量较3#样品都有明显的提高,其中1#样品总产气量为40750mL,是3#样品的1.1倍;其反应后总固体(TS)、挥发性固体(VS)减少的也最多,分别由32.8%和47.8%提高到了37%和50.9%。因此,绿氧(GO)与NaOH组合可以提高秸秆的可生物降解性和发酵产气率。

Green oxygen（GO） and NaOH have been used in combination to treat corn stalk.The biogasification performance of corn stalk pretreated by different amounts of GO and NaOH was investigated.The results showed that the gas production peak appeared earlier for the treated corn stalk.Values of the technical digestion time T80（the time to reach 80% of the maximal production） were 31 days and 34 days for the corn stalks treated by 0.05%GO＋2%NaOH（1#） and 0.1%GO＋2%NaOH（2#）, respectively;these are 5 days and 2 days shorter,respectively than the corresponding values for the corn stalk treated by 2%NaOH alone（3#）.The total biogas production of samples 1# and 2# showed an obvious increase compared with that for sample 3#.Sample 1# afforded a total biogas production of 40750 mL,which was 1.1 times that of sample 3#.Sample 1# also showed the biggest reductions in total solids（TS） and volatile solids（VS）,with the reductions of VS and TS being increased from 47.8% and 32.8% for sample 3# to 50.9% and 37.0%,respectively,for sample 1#.The results suggest that pretreatment by a combination of GO and NaOH is an effective method to improve the biodegradability and gas production rate of corn stalk.