摘要
为探究温度对MEC(Microbial electrolytic cell)阳极膜形成的影响,本实验采用单池MEC产氢装置,在外加电解电压1. 0V,p H=7的厌氧环境下,利用厌氧活性污泥为接种物,以乙酸钠为底物,分别在温度为15℃,25℃,35℃,45℃,55℃的条件下进行MEC阳极膜的培养及阳极膜的产氢能力验证实验。培养过程中,通过测定电解电流,p H值,氢气含量,电化学活性、膜生物量等指标的变化,以分析温度对MEC阳极膜形成的影响;验证实验中则通过测定氢气含量说明各温度条件下培养的膜的产氢能力。实验结果表明,在温度从15℃逐渐升至55℃的过程中,各实验组产生的最大电流先逐渐增大,而后又逐渐减小,最大电流分别为13. 5mA、17. 9mA、22. 5mA、1. 1mA、0. 5mA,相比之下,高温较低温更不利于电活性微生物的生长富集,而中温(25～35℃)最利于其生长繁殖。其中,在35℃时呈现出较大的电流值,最大电流值为22. 5mA,在35℃时氢气含量也最高,高达24. 49%,所以35℃是MEC阳极膜形成的最佳温度。
To investigate the effect of temperature on the formation of MEC anodic films,the MEC hydrogen production unit was used as the inoculum with anaerobic activated sludge at the external power supply voltage of 1. 0 V,p H = 7 and anaerobic environment.The effects of temperature on the MEC anode were investigated by measuring the change of electrolysis current,p H value,electrode potential,hydrogen content and electrochemical activity at the temperature of 15 ℃,25 ℃,35 ℃,45 ℃ and 55 ℃. Membrane formation.The experimental results show that the temperature gradually increases from 15 ℃ to 55 ℃,and then decreases gradually.The maximum currents are 13. 5 m A,17. 9 m A,22. 5 m A,1. 1 m A,and 0. 5 m A,respectively. In contrast,lower temperature and lower temperature are more detrimental to the growth and enrichment of electroactive microorganisms,while medium temperature( 25-35 °C) is most conducive to growth. Reproduction. When the temperature is about 35 ℃,the current is stable and the current is 22. 5 MA,the highest hydrogen content at 35 ℃,up to 24. 49%,so it is 35 ℃ is the best temperature of MEC anode film formation.
作者
邵琼丽
李建昌
邓盛娇
孙和临
SHAO Qiong-li;LI Jian-chang;DENG Sheng-jiao;SUN He-lin(College of Energy and Environmental Sciences,Yunnan Normal University,Kunming,Yunnan,650500,China)
出处
《化学研究与应用》
CAS
CSCD
北大核心
2018年第12期1986-1992,共7页
Chemical Research and Application
基金
国家自然科学基金项目<外源电解协助构建微生物电解池阳极电活性微生物膜的研究>(21463029)资助
关键词
MEC
阳极膜
温度
培养
产氢
MEC
anode film
temperature
culture
hydrogen production
作者简介
李建昌(1966-),男,副教授,主要从事微生物电解池制氢的研究。E-mail:li.jianchang@aliyun.com
