期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
PTA污水生化沼气利用初探
1
作者 杨曙 《节能》 2018年第4期61-63,共3页
PTA生产过程产生大量污水,污水处理困扰PTA生产企业。PTA污水生化沼气如何被高效利用,能将其变废为宝成为聚酯生产优质燃料。通过比较生化沼气输配方式优劣,对进炉燃烧方案进行优化,结合工艺流程,评价了改造后的效果。
关键词 PTA污水 生化沼气 送烧 热媒炉 控制
下载PDF
蓝藻猪粪共发酵产沼气及动力学研究 被引量:26
2
作者 王寿权 严群 阮文权 《食品与生物技术学报》 CAS CSCD 北大核心 2008年第5期108-112,共5页
对蓝藻与猪粪分批混合发酵进行了研究。结果表明,猪粪与蓝藻总固体(TS)质量比例在3∶7时产气效果最好,发酵最佳初始pH为8.0。在整个反应中,产沼气潜力分别为175 mL/g、546 mL/g、560 mL/g,发酵出料中总氮含量为2.2 g/L,总磷含量为0.14 g... 对蓝藻与猪粪分批混合发酵进行了研究。结果表明,猪粪与蓝藻总固体(TS)质量比例在3∶7时产气效果最好,发酵最佳初始pH为8.0。在整个反应中,产沼气潜力分别为175 mL/g、546 mL/g、560 mL/g,发酵出料中总氮含量为2.2 g/L,总磷含量为0.14 g/L,未检出藻毒素,可以作为肥料使用。对发酵的生化产沼气潜力(BMP)的研究结果表明,最终甲烷产量B0为302.5 mL/g,反应速率常数k为0.144 d-1,整个产甲烷的过程与Cheynoweth方程的相关系数R2为0.976 7,能够用Cheynoweth方程较好反映蓝藻与猪粪混合产甲烷的规律。 展开更多
关键词 蓝藻 猪粪 厌氧发酵 沼气 生化沼气潜力
下载PDF
源头破碎沥水处理厨余垃圾及产甲烷潜力研究 被引量:2
3
作者 蒙艳 刘彤宙 《资源节约与环保》 2019年第4期147-147,169,共2页
针对国内家庭厨余垃圾总量大、处理难的特点,本文使用一种家庭端厨余垃圾破碎沥水设备,对破碎沥水后的厨余垃圾体积、重量、理化和产气潜力等进行评价。结果表明,厨余垃圾经过破碎沥水处理后减容率和减重率分别为40%~60%和15~30%;处... 针对国内家庭厨余垃圾总量大、处理难的特点,本文使用一种家庭端厨余垃圾破碎沥水设备,对破碎沥水后的厨余垃圾体积、重量、理化和产气潜力等进行评价。结果表明,厨余垃圾经过破碎沥水处理后减容率和减重率分别为40%~60%和15~30%;处理后厨余垃圾适合厌氧发酵处理,且设备产生的冲洗废水可直接汇入生活污水管网;厨余垃圾发酵产生甲烷含量高达到55%,试验开始时即表现出较高的产气速率;不同有机成分影响厨余垃圾的发酵。 展开更多
关键词 厨余垃圾 源头破碎沥水 减容减重效果 生化沼气潜力
下载PDF
Methanethiol Removal from Biogas by Biological Conversion in an Anaerobic Biotrickling Filter
4
作者 王佳佳 张卫江 徐姣 《Transactions of Tianjin University》 EI CAS 2015年第3期259-263,共5页
In this study, methanethiol(MT)-degradation bacteria were cultivated by using MT, methanol and trimethylamine as carbon sources under anaerobic conditions. It was found that the batch bacteria used MT and metha- nol... In this study, methanethiol(MT)-degradation bacteria were cultivated by using MT, methanol and trimethylamine as carbon sources under anaerobic conditions. It was found that the batch bacteria used MT and metha- nol as carbon sources grew faster than those used trimethylamine. The enriched bacteria used MT and methanol as the carbon sources were respectively inoculated in different biotrickling filters. The biological conversion performance ot MT under anaerobic conditions was investigated in biotrickling filters. The results showed that the performance of the biotrickling filter inoculated with the bacteria enriched using MT was better than that inoculated with the bacteria en- riched using methanol. When the inlet concentration of MT was 0.005vo1% (50 ppm), the empty bed residence time was 50 s, pH value was 8.0, and the flow rate of the nutrient solution was 10 L/h, the removal efficiency of MT reached 95.3%. Adding methanol stimulated the growth of the biomass and the degradation of MT, but caused that some bacteria only degrading methanol outcompeted the bacteria only degrading MT. The concentration of sodium bicarbonate in the nutrient solution needed to be controlled lower than 30 g/L, otherwise, it would be harmful to the degradation of MT. 展开更多
关键词 METHANETHIOL degradation biotrickling filter METHANOL sodium bicarbonate
下载PDF
Development of an Anaerobic Digestion Unit for Biogas Production from Cow Dung Substrate
5
作者 Adesoji Matthew Olaniyan Musliu Olushola Sunmonu Kehinde Peter Alabi 《Journal of Agricultural Science and Technology(A)》 2014年第9期743-749,共7页
An anaerobic digestion unit for producing biogas from cow dung in the rural communities was designed, fabricated and tested for performance, durability and throughput. The major components of the digester included the... An anaerobic digestion unit for producing biogas from cow dung in the rural communities was designed, fabricated and tested for performance, durability and throughput. The major components of the digester included the substrate holding tank, tank cover, agitator, debris collector, inlet and outlet pipes, gas reception tank, hose and heat source. The digester is a vertical cylindrical tank with an inlet pipe for the introduction of substrate and an outlet pipe to collect the digested substrate. An agitator is incorporated inside the digester to break scum on the substrate and create uniform temperature profile in the digester while a pressure gauge was fitted to the gas outlet valve to measure the gas pressure in the tank. The agitator shaft is extended outside to be driven by an electric motor through belt and pulley system. The criteria considered in the design of the digester included air tightness of the system, mesophilic and thermophilic temperature, nature and type of substrate used, substrate retention period, number of crank turns per minute and volumetric capacity of the digestion tank. Other considerations included the desire to make the digestion tank and gas reception tank of galvanized steel to ensure good quality of the product and the need for a strong structural support to ensure structural stability of the system. After construction and assembly, the biogas digestion unit was tested with 40 kg of cow dung diluted with 80 kg of water and subjected to a retention period to make a substrate (slurry) of 10 % total solid (TS). Daily gas yield was determined; gas pressure in the tank was measured by the pressure gauge, while the ambient temperature was taken at five hours interval. Results showed that a cumulative gas yield of 0.415 litres after 22 d retention period at average substrate temperature and pH of 29 ℃ and 6.2, respectively. The digester has a substrate holding capacity of 330.8 litres and a production cost of $375 with all the construction materials being available locally. 展开更多
关键词 Anaerobic digestion BIOGAS COW dung.
下载PDF
Biogas by two-stage microbial anaerobic and semi-continuous digestion of Chinese cabbage waste
6
作者 Xiaoying Dong Lijie Shao +3 位作者 Yan Wang Wei Kou Yanxin Cao Dalei Zhang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第5期847-852,共6页
Anaerobic digestion of Chinese cabbage waste was investigated through a pilot-scale two-stage digester at a mesophilic temperature of 37 ℃. In the acidification digester, the main product was acetic acid, with the ma... Anaerobic digestion of Chinese cabbage waste was investigated through a pilot-scale two-stage digester at a mesophilic temperature of 37 ℃. In the acidification digester, the main product was acetic acid, with the maxi- mum concentration of 4289 mg·L^-1 on the fourth day, accounting for 50.32% of total volatile fatty acids. The oxidation reduction potential (ORP) and NH^+-N level decreased gradually with hydraulic retention time (HRT) of acidification. In the second digestion phase, the maximum methanogenic bacterial concentration reached 9.6 × 10^10ml^-1 at the organic loading rate (OLR) of 3.5-4 kg VS·m^-3, with corresponding HRT of 12-16 days. Accordingly, the optimal biogas production was 0.62 m^3· (kg VS)^-1, with methane content of 65%-68%;. ORP and NH4^+-N levels in the methanizer remained between -500 and -560 mV and 2000-4500mg· L^-1, respec- tively. Methanococcus and Methanosarcina served as the main methanogens in the anaerobic digester. 展开更多
关键词 Anaerobic digestion Semi-continuous Two-stage Biogas Chinese cabbage waste Microbial ecology
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部