ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
Clostridium lentocellum SG6 fermented various pure crystalline cellulosic materials eciently with maximum acetic acid yield (gram acetic acid/gram substrate) of 0.67, at low substrate (8 g l)1 ) concentration. The strain grew poorly on crude biopolymers but fermented them easily after alkali treatment, when grown with 8 g substrate l)1 concentration of alkali-extracted cotton straw (AECS), paddy straw (AEPS) and sorghum stover (AESS) etc. The acetic acid to substrate (A/S) ratios were similar to those obtained with pure cellulosic materials. An increase in substrate concentration led to a decreased A/S ratio and a decreased percentage of substrate degraded. At high substrate concentration of 75 g ®lter paper l)1 , the strain SG6 converted 63.2 g ®lter paper into 31.28 g acetic acid l)1 . At 100 g l)1 concentrations, AECS and AEPS served as the best substrates for acetic acid production when compared with other biopolymers. A maximum amount of 30.98 and 30.86 g acetic acid was produced from 70.6 g AEPS and 70.1 g AESS l)1 of medium by strain SG6, respectively. Acetic acid production of 0.67 g g)1 pure cellulose (Whatman No. 1 ®lter paper), 0.63 g g)1 of alkali-treated cotton straw (AECS) are the highest among the cellulolytic bacteria reported so far in mono culture fermentations with pure and native cellulosic materials.