沼液原位生化预处理玉米秸与猪粪混合厌氧消化性能分析  

Anaerobic co-digestion of corn stalk and swine manure with situ biogas slurry pretreatment

作　　者：彭翔[1] 李秀金[1] 袁海荣[1] 刘研萍[1] 邹德勋[1] 庞云芝[1] 

机构地区：[1]北京化工大学化学工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2016年第6期71-77,共7页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家"十二五"科技支撑项目(2015BAD21B03/2014BAC24B01)

摘　　要：对沼液预处理玉米秸与猪粪的混合厌氧消化性能进行研究,针对主要预处理参数采用四因素四水平正交实验设计,结果表明：经沼液预处理的各组累积产甲烷量比未处理组提高8.07%～32.56%;最优预处理条件为总含固率10%,沼液经4 mm筛网过滤,预处理温度35℃,预处理时间3 d;在最优预处理条件下,沼液预处理较未处理组产气峰值提高65.01%,出现峰值时间提前8 d,累积产甲烷量达到80%时间（t80）缩短33.33%,单位总固体含量（TS）产甲烷量达到192.45 m L/g,比未处理组提高了22.89%,与Na OH预处理效果相近,氨氮、碱度浓度适中,系统稳定性良好。因此,沼液预处理能够明显提高混合物料的厌氧消化性能,同时减少沼液排放,降低二次污染。Orthogonal experiments （four factors, four levels） have been carried out to investigate the anaerobic codigestion of biogas slurry as a pretreatment for corn stalk and swine manure. The results indicated that cumulative methane production for groups with biogas slurry treatment were enhanced by 8.07%- 32.56% compared with the control group. The optimal experimental conditions were-found to be 10% solid content slurry filter aperture, a temperature of 35℃, and 3 days for pretreatment. Under these conditions, the peak in production was 65.01% higher and appeared 8 days earlier than in the case of the unpretreated groups. with a 4 mm daily biogas The time at which cumulative methane production capacity reached 80% （ts0） was accordingly shortened by 33.33%. The bio- gas production per total solids content （TS） was 192.45 mL/g, which was 22.89% higher than for the unpretreated group. The cumulative biogas production was close to that in the NaOH pretreatment group. The anaerobic digestion system was stable, based on the concentration of ammonia nitrogen and alkalinity. These results show that anaero- bic co-digestion of two substrates can be significantly improved by biogas slurry pretreatment of the mixtures, with concomitant reductions in biogas slurry emissions and secondary pollution.

关 键 词：沼液预处理 厌氧消化 玉米秸秆 沼气 

分 类 号：X712[环境科学与工程—环境工程]