污泥与垃圾焚烧厂渗滤液联合厌氧发酵产氢研究
刘常青,李华藩2,柯壹红2,郑育毅2
1. 福建师范大学地理科学学院,福州 350007;2. 福建师范大学环境科学研究所,福州 350007
摘要:以污泥与渗滤液为原料,考察了垃圾渗滤液的不同添加量以及不同的渗滤液初始pH对厌氧消化稳定性及产氢气性能的影响。结果表明,未添加污泥的渗滤液本身也可以在厌氧发酵过程中产氢。当渗滤液初始pH=5.20时,添加90%的渗滤液时产氢氢能最大,为201.58 mL,最大产氢速率也最高,为9.56mL/h;当初始渗滤液pH=4.47时,最大产氢量出现在渗滤液添加剂量为60 %的样品为57.73mL,随后减小,但最大产氢速度在添加40%的渗滤液达到峰值,为5.11mL/h。
关键词:渗滤液;联合厌氧发酵;生物制氢;污泥
Hydrogen Production from Codigestion of Sewage Sludge and Municipal Solid Waste Leachate
Liu Changqing , Li Huafan2,KeYihong2,Zheng Yuyi2
1. College of Geographical Science, Fujian Normal University, Fuzhou 350007,China;2. Institute of Environmental Science, Fujian Normal University, Fuzhou 350007,China
Abstract:Using sludge and leachate as anaerobic fermentation materials,influences of feedstock proportion on stability of anaerobic fermentation and performance of hydrogen production were investigated. The results show that the leachate without added sludge itself can also produce hydrogen during anaerobic fermentation. When the initial pH of leachate=5.20, the maximum hydrogen production and hydrogen production when adding 90% leachate is 201.58 mL, and the maximum hydrogen production rate is also the highest, 9.56mL/h. When the initial leachate pH=4.47, the maximum yield is obtained. The amount of hydrogen present in the sample with a leachate additive of 60% was 57.73 mL, which was subsequently reduced, but the maximum hydrogen production rate reached a peak at the addition of 40% of the leachate, which was 5.11 mL/h.
Keywords: Municipal solid waste leachate;Anaerobic co-digestion;bio-hydrogen production;Sludge
1.前言
氢气是化石燃料的有前途的替代品。与化石燃料不同,氢气的燃烧,氢气的燃烧不会产生温室气体,因此不会引起全球变暖。它具有较高的单位重量能量产量(141.9 J / kg)。此外,H2可以从各种类型的富含有机物的废物中生产,如釜馏物,污泥,渗滤液,果渣,秸秆和甘蔗渣。因此,生物H2生产有助于减少废物。随着化石燃料储备的迅速枯竭,H2作为清洁和可持续能源的重要性日益增加。
渗滤液中的水分一部分源于垃圾本身含水,另一部分源于垃圾厌氧发酵产生的水分;其组分主要为垃圾中污染物的溶出和随水流带出的细小悬浮物。水质受垃圾成分、垃圾储坑停留时间、储坑内垃圾堆放方式、垃圾层中微生物生长特性等因素影响。此外,由于地域及气候季节差异,渗滤液水质也会有很大变化。对于发酵产氢,pH则是非常重要的影响参数。
详见:中国给水排水2019年中国城镇污泥处理处置技术与应用高级研讨会(第十届) 论文集