摘要
为了研究餐厨垃圾高温（55℃）厌氧消化条件下,高浓度Na Cl对产甲烷的抑制及除盐后的产甲烷恢复情况,建立了4组血清瓶实验分别研究在较低Na Cl质量浓度（5 g/L,A组）、Na Cl质量浓度突然增加（20 g/L,B组）以及在不同的高浓度Na Cl抑制时间后采取除盐处理（C、D组）对餐厨垃圾产甲烷的影响。结果表明,当Na Cl质量浓度为5 g/L时,高温厌氧消化甲烷产量和浓度在前期逐渐上升,最高分别可以达到27 m L/d和71.3%;当Na Cl浓度升高至20 g/L后,甲烷产量在2 d之内迅速下降,之后逐渐降低,甲烷日产量低于1 m L/d,产甲烷抑制作用明显;而在Na Cl质量浓度由20 g/L降低至5 g/L之后,甲烷产量又有不同程度的恢复,其中在高浓度Na Cl条件下5 d之后降低其浓度的C组实验相比15 d之后才降低浓度的D组实验甲烷产量恢复效果要好;同时甲烷浓度的变化也受到Na Cl浓度变化的影响,Na Cl浓度增大会导致产气中甲烷浓度降至30%-35%,而减小Na Cl浓度之后,甲烷浓度可以恢复至50%-58%。
Serum bottle experiments were conducted to investigate the inhibition and recovery effects of high Na Cl concentration on methane production from thermophilic（ 55 ℃） anaerobic digestion of food waste. Results indicated that when Na Cl concentration was maintained at 5 g / L（ group A）,the daily methane volume and concentration could gradually increase to approximately 27 m L / d and 71. 3%,respectively. However,when the Na Cl concentration was 20 g / L（ group B）,the daily methane volume dropped sharply to a very low level within2 days,and then it was kept under 1 m L / d; methane production was strongly inhibited. After lowering Na Cl concentration from 20 to 5 g / L（ groups C and D）,the daily methane production was recovered to different levels,depending on the inhibition time. Results showed that the methanogenesis recovery time became longer along with the increase in inhibition time under high Na Cl concentrations. In addition,the methane concentration was also affected by the variation in Na Cl concentration. Methane concentration decreased to the range of 30% to35% in response to the increase in Na Cl concentration. After the lowering of Na Cl concentration,the methane concentration could recover to the range of 50% to 58%.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第3期1426-1431,共6页
Chinese Journal of Environmental Engineering
基金
国家海洋公益性行业科研项目(201305022)
深圳市科技计划技术创新项目(CXZZ20151117141320317)
关键词
氯化钠浓度
餐厨垃圾
高温厌氧消化
甲烷恢复
NaCl concentration
food waste
thermophilic anaerobic digestion
methane recovery
