| 预处理及物料配比对有机垃圾厌氧发酵的影响 |
| |
| 引用本文： | 徐一雯,杨国栋,王凤侠,陈辉艇,黄爱莲,刘丽婷,江燕航,宋迎春,蒋建国. 预处理及物料配比对有机垃圾厌氧发酵的影响[J]. 环境工程, 2021, 39(4): 100-106. DOI: 10.13205/j.hjgc.202104016 |
| |
| 作者姓名： | 徐一雯 杨国栋 王凤侠 陈辉艇 黄爱莲 刘丽婷 江燕航 宋迎春 蒋建国 |
| |
| 作者单位： | 1. 清华大学 环境学院, 北京 100084; |
| |
| 摘 要： | 针对我国推行垃圾分类政策后产生的大量有机垃圾难以有效消纳的问题,开展了厨余、果蔬与园林垃圾连续式厌氧发酵实验,并通过超声与碱热预处理技术改善产甲烷性能,并以厨余垃圾单独厌氧发酵作为对照实验组.根据进料有机负荷(OLR),将反应周期分为低有机负荷[OLR=1,2 g/(L·d)]和高有机负荷[OLR=4,6 g/(L·d...
|
| 关 键 词： | 厨余垃圾 果蔬垃圾 园林垃圾 联合厌氧发酵 预处理 |
| 收稿时间： | 2020-04-13 |
EFFECTS OF PRETREATMENTS AND SUBSTRATE COMPOSITIONS ON ANAEROBIC DIGESTION OF ORGANIC WASTE |
| |
| Affiliation: | 1. School of Environment, Tsinghua University, Beijing 100084, China;2. City Appearance and Environmental Management Center of Baoan District, Shenzhen, Shenzhen 518101, China |
| |
| Abstract: | With the implementation of waste sorting policy in China, efficient utilization of organic waste becomes a great challenge in China. In this paper, continuous experiments on anaerobic digestions of kitchen waste, fruit and vegetable waste and garden waste were conducted, while ultrasound and alkali-thermal pretreatment were applied to enhance methane production, with the mono-digestion of food waste served as the control. According to different OLRs, the reaction period was divided into low OLR phase[OLR=1, 2 g/(L·d)] and high OLR phase[OLR=4, 6 g/(L·d)]. The results showed that under low OLR, all reaction systems showed strong stability, among which, kitchen waste had the highest VS removal rate of 90.3% and methane yield of 460 mL/g. Besides, after ultrasonic pretreatment and alkali-thermal pretreatment, the methane yields of co-substrates were increased by 7%~8% and 3%~7%, respectively. Under high organic load, the stability of mono-digestion system was significantly reduced, specifically, the pH value was decreased to 6.70 and the concentration of VFA and TAN was accumulated to 1230, 1519 mg/L, while the VS removal rate and methane yield were reduced by 2.8% and 11% as well. However, the co-digestion systems showed stronger resistance to high OLRs. Compared with kitchen waste, the methane yield of co-substrate was increased to 420 mL/g. After ultrasonic pretreatment, the methane yield was further increased by 3%, while the methane yield after alkali-thermal pretreatment was decreased by 4%. |
| |
| Keywords: | |
|
| 点击此处可从《环境工程》浏览原始摘要信息 |
|
点击此处可从《环境工程》下载免费的PDF全文 |
|
