从维纳斯和微藻中生产挥发性脂肪酸和甲,使用双阶段无氧共消化
Agnes Adam Duarte Pinheiro1, Edilberto Mariano da Silva1, Dicla Cesario Pereira de Oliveira1
1Federal University of Pernambuco, Department of Civil and Environmental Engineering, Cidade Universitária, CEP, Recife, PE, 50670-901, Brazil.
概括
将维纳斯 (VIN) 添加到微藻生物质 (MB) 中,可以在无氧消化 (AD) 过程中增加甲 (CH4) 的产生. MB的预处理提高了稳定性,提高了沼气产量,这表明了有希望的联合消化策略.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 无氧消化 (AD) 是废物利用的关键技术.
- 微藻生物质 (MB) 和维纳斯 (VIN) 是AD.的潜在原料.
- 优化MB和VIN的共同消化对于高效的甲 (CH4) 生产至关重要.
研究的目的:
- 评估维纳斯 (VIN) 作为辅基质对微藻生物质 (MB) 无氧消化 (AD) 的影响.
- 在共消化过程中评估稳定性和挥发性脂肪酸 (VFA) 和甲 (CH4) 生产.
- 研究微藻生物质预处理对AD过程的影响.
主要方法:
- 两个阶段的无氧消化系统:酸性反应堆 (AR),其次是甲性反应堆 (MR).
- 包括的阶段:VIN启动,MB+VIN共消化,以及预处理的MB (PTMB) +VIN共消化 (50:50 COD比).
- 监测VFA,CH4产量,以及微生物群体分析 (例如,Methanosaeta).
主要成果:
- 第一个阶段 (VIN AD):VFA从240增加到2126 mg/L;CH4产量平均为71±37 NmL CH4/g COD.
- 第二阶段 (MB+VIN):由于VFA积累,最初的CH4产量为246±31毫升CH4/g COD,降至63毫升CH4/g COD,稳定在183毫升CH4/g COD.
- 第三阶段 (PTMB+VIN):CH4产量达到197 ± 72NmL CH4/g COD,比第一阶段增加2.7倍,比第二阶段增加1.1倍.
结论:
- 可以同时消化MB和VIN,预处理可提高稳定性和CH4产量.
- 乙类甲生成,由乙酸盐生产者如Methanosaeta主导,是主要的途径.
- 这项研究表明,利用维纳斯利用微藻生物质改善生物气生产的可行策略.
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