摘要
醋糟在酿造行业中大量产生,除少量用于饲料添加外,大部分成为生物质废弃物,适合于厌氧产沼方式进行能源化处理,但较低的产气量又成为制约厌氧消化工艺应用的主要因素.本研究发现利用废弃轮胎热解过程产生的热解炭,可有效提升醋糟厌氧产甲烷效果,在接种比为1∶1(以VS计)时,产甲烷效果最优,相对于未投加热解炭的对照组,甲烷产率提高56%,达到283 mL·g^(-1);进一步对热解炭制备温度和投加量影响产甲烷效果进行了研究,结果表明,在接种比为1∶1的条件下,热解炭投加量越多,热解温度越高,甲烷产率提升效果越明显,本研究中,当热解炭投加量为12 g,热解温度为1000℃时,甲烷产率相比对照组提升104.4%.通过高通量测序分析,同时结合热解炭本身特性表征,进一步证实热解炭投加可提升水解产酸菌和厌氧产甲烷菌丰度,而其热解炭本身的导电性能可能在增强菌群间互营产甲烷过程中发挥重要作用.
Vinegar residue(VR) is largely produced in the brewing industry. Except for a small amount for animal feed additive, most of VR is used as biowaste. Anerobic digestion(AD) is a favorable treatment method for biowaste, producing large amounts of energy. However, the low methane(CH4) production is the main factor restrictings the application of AD in VR treatment. This study found that the pyrolytic carbon generated from the pyrolysis of waste tires could effectively enhance the anaerobic methanogenic performance of VR AD. When the optimal inoculation ratio condition of inoculum to substrate(ISR) is 1∶1(measured by VS), the CH4 yield is the best and the methane production rate increased by 56% to 283 mL·g^(-1) compared to the control group without pyrolytic carbon dosing. Furthermore, the pyrolysis temperature and dosage for the VR AD system were studied. Results showed that under the condition of 1∶1 inoculation ration, The more pyrolytic carbon is added and the higher the temperature is, more CH4 will be generated. Specially, CH4 yield rate is increased by 104.4% with pyrolysis temperature of 1000 ℃ and pyrolytic carbon dosage of 12 g as compared with the control group. The high throughput sequencing analysis results combined with characteristics of pyrolytic carbon further confirmed that abundances of both hydrolytic bacteria and methanogens were increased after the addition of pyrolytic carbon, which might be from by the good conductivity of pyrolytic carbon, and it played a vital role in microbial syntrophism formation in methanogenic process.
作者
李明凯
孔鑫
谢莉
岳秀萍
袁进
周爱娟
LI Mingkai;KONG Xin;XIE Li;YUE Xiuping;YUAN Jin;ZHOU Aijuan(School of Environment Science and Engineering,Taiyuan University of Technology,Taiyuan 030024;School of Environment,Tsinghua University,Beijing 100084)
出处
《环境科学学报》
CAS
CSCD
北大核心
2021年第9期3641-3649,共9页
Acta Scientiae Circumstantiae
基金
国家自然科学基金项目(No.51908396)
宁波市科技计划项目(No.2018B10023)
山西省应用基础研究项目(No.201801D221338)。
关键词
醋糟
废弃轮胎
热解炭
接种比
厌氧消化
热解温度
vinegar residues(VR)
waste tires
pyrolytic carbon
inoculum to substrate ratio(ISR)
anaerobic digestion
pyrolysis temperature
