Anaerobic hydrogen production of molasses from mixed microbial communities immobilized by activated granular carbon

Molasses wastewater was evaluated as substrate for biohydrogen production by anaerobic fermentation in a novel continuous mixed attached growth reactor ( CMAGR ) with aeration pretreated sludge attached onto granular activated carbon under continuous flow condition.It was indicated that the CMAGR system was operated at the conditions of influent COD of 2000～6000mg / L , hydraulic retention time ( HRT ) of 6hand temperature of 35 ℃ , when the pH value and oxidation-reduction potential ( ORP ) ranged from 4.16and-434 mV respectively , stable ethanol-type fermentation was formed with the sum of ethanol and acetate concentration ratio of 89.3%to the total liquid products after 40days operation.The H 2 content in biogas and chemical oxygen demand ( COD ) removal were estimated to be 46.6% and 13% , respectively.It was also investigated that the effects of organic loading rates ( OLRs ) on CMAGR hydrogen production system.It was found that hydrogen production yield increased from 3.72 mmol / hL to 12.51 mmol / hL as OLRs increased from 8 kg / m 3 d to 32 kg / m 3 d.The maximum hydrogen production rate of 12.51mmol / hL at a OLR of 32kg / m 3 d and the maximum hydrogen yield by substrate consumed was 130.57 mmol / mol happened at OLR of 16 kg / m 3 d.Greater pHs appeared to be favour to butyrate production and the maximum of 0.51mol / mol was obtained at pH of 4.14.However , ethanol / acetate ratio was greater than 1.1at pH fluctuated between 3.4 - 3.6and 4.1 - 4.4which indicated that these pHs were favour to ethanol type fermentation.Therefore , the continuous mixed attached growth reactor ( CMAGR ) could be a promising attached growth system for biohydrogen fermentation.     

甜菜良种繁育有关理论与技术分析：6.甜菜品种的环境的互作与糖厂主栽 …

本文讨论了甜菜品种的种性与环境互作及这种互作对甜菜品种根产量，含糖率和抗病性的影响。这种由环境产出的经济性变异可以分为可预测的环境和不可预测的环境变异两种类型因此，糖厂在自己的甜菜产区主栽品种的选择上，应该在参考品种区域化试验和生产示范数据的同时，安排品种对比试验确定品种种性     

制糖废水厌氧发酵制氢技术研究进展

归纳了厌氧发酵生物制氢的产氢机理、主要途径及影响因素,重点阐述了制糖废水的研究现状和发展趋势.通过分析制糖废水的处理研究进展,可知目前的处理主要集中在厌氧发酵制氢工艺并且取得了良好的成果,对开展后续研究有一定的指导意义,为生物制氢技术实现工业化奠定了基础.但仍存在一些问题和困难,并提出了一些解决策略.     

依托特色实验室建立应用化学专业创新性实践教学模式

创新性实践教学是高校人才培养的重要环节,本学院近几年来在依托特色实验室建立应用化学专业创新性实践教学新模式方面进行了一些有益的改革探索,并取得了良好的效果,文章从教学内容、方式和手段等方面对其进行了介绍。     

多层次、递进式创新性实践教学模式的研究与探索

创新性实践教学是高校人才培养的重要环节,广东工业大学轻工化工学院近年来结合学院自身特点,在应用化学专业推行"多层次、递进式创新性实践教学模式",分别针对不同层次和不同阶段的本科生,逐步递进培养学生的自主探究式学习意识、创新性研究意识和创新性工程研发能力,使学生实现从工科院校入学新生到应用化学专业创新型工程人才的蜕变。     

室内甲醛催化净化装置的设计与开发

文章在于提供一种高效、多功能和价格便宜的甲醛催化净化装置,以解决目前市面上甲醛净化装置存在的效率低、功能单一和价格昂贵的问题。该多功能甲醛催化净化装置具有室温持续高效甲醛净化功能、多功能和人性化、小型集成化设计和整机价格低廉的特点,具有良好的市场推广前景。     

我国平板玻璃企业现状、面临形势和发展策略

1我国平板玻璃工业现状 新中国成立之后,我国平板玻璃工业得到了飞速发展,尤其是改革开放以后的二十多年取得的成就更令世人瞩目.     

秸秆的强化糖化技术及其生物制氢的实验研究

通过对植物秸秆的糖化降解,在不同时间、不同温度下测定糖含量,并进行产氢实验.结果表明,用盐酸降解植物秸秆的效果比醋酸好,在时间为1h、温度在20℃时,各有最大的糖度值36.8、35.4Bdx,相对应产氢量为0.02mL、0.0182mL H2/L糖化液.因此,利用秸秆糖化技术并进行产氢的可行性研究会成为一个研究热点.     

产氢细菌对不同单双糖的发酵产氢利用与效能

采用间歇培养方法,分别以单糖(葡萄糖、果糖、半乳糖和甘露糖)、双糖(蔗糖)作为产氢微生物培养基中的底物,对产氢微生物培养过程中的产氢效能进行了研究,探索产氢细菌对不同单双糖的发酵产氢的利用与效能.研究结果表明:不同单糖之间的气体产量差别较小,但是底物浓度对氢气产量影响很大;葡萄糖浓度10g/L是产氢菌SUES-1生长、产氢的适宜底物浓度;双糖(蔗糖)的产氢量大于相同浓度单糖(葡萄糖)的产氢量.     

The molecular biological characterization of a strain of biohydrogen-producing anaerobe in Clostridium Genus

The anaerobic process of biohydrogen production was developed recently. The isolation and identification of biohydrogen producing anaerobic bacteria with high evolution rate and yield is an important foundation of the fermented biohydrogen production process through which anaerobic bacteria digest organic wastewater. By considering physiological and biochemical traits, morphological characteristics and a 16S rDNA sequence, the isolated Rennanqilyf33 is shown to be a new species.