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Search Results: 1 - 10 of 353353 matches for " Biofiltration<br>生物净化技术 "
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Recent Developments in Biological Waste Gas Purification
生物净化废气技术的进展

ZHANG Tian-Tian,LI Jian-Jun,CEN Ying-Hua,SUN Guo-Ping,
张甜甜
,李建军,岑英华,孙国萍

微生物学通报 , 2007,
Abstract: Biological treatment provides an cost effective and environmentally friendly alternative for many waste gas emissions.Biological waste air treatment is achieved at ambient temperatures,it does not generate secondary pollutants,such as nitrogen oxides,it has become in many instances the method of choice for the control of low concentrations of odors,volatile organic compounds,or hazardous air pollutants in large air streams.A significant body of knowledge and experience has been generated on biological waste gas purification.Examples of waste gas treatment are presented in this paper,such as at municipal wastewater treatment plants,emission from live stock industries,sulfur emissions from industries.This paper discusses the problem of how to prevent biomass clogging and introduces the application of molecular biotechnology in biologeical treatment.The development trend of the Biological treatment are discussed.We hope the biological treatments can gain widely application in China.
Recent Developments in Biological Waste Gas Purification
生物净化废气技术的进展

ZHANG Tian-Tian,LI Jian-Jun,CEN Ying-Hua,SUN Guo-Ping,
张甜甜
,李建军,岑英华,孙国萍

微生物学报 , 2007,
Abstract: Biological treatment provides an cost effective and environmentally friendly alternative for many waste gas emissions. Biological waste air treatment is achieved at ambient temperatures, it does not generate secondary pollutants, such as nitrogen oxides, it has become in many instances the method of choice for the control of low concentrations of odors, volatile organic compounds, or hazardous air pollutants in large air streams. A significant body of knowledge and experience has been generated on biological waste gas purification. Examples of waste gas treatment are presented in this paper, such as at municipal wastewater treatment plants, emission from live stock industries, sulfur emissions from industries. This paper discusses the problem of how to prevent biomass clogging and introduces the application of molecular biotechnology in biologeical treatment.The development trend of the Biological treatment are discussed.We hope the biological treatments can gain widely application in China.
Start-up and Affecting Factors of Biofilter for Treatment of NOx Under Aerobic Conditions
有氧条件下生物滤塔去除NOx的挂膜启动及研究

LI Hui-ying,HUANG Shao-bin,LU Le,WANG Rui-min,HUANG Hui-xing,
李慧颖
,黄少斌,卢乐,王瑞敏,黄慧星

环境科学 , 2011,
Abstract: An optimized aerobic denitrifying bacteria was applied to a biofilter for the removal of NOx. The removal process of NOx was investigated, and the relationship between environmental factors and NOx removal efficiency as well as the NOx transfermechanism under aerobic conditions are discussed. The results show that the biofilter finished start-up after 26 days and the presence of oxygen has no evident negative effect on the efficiency of NOx removal. Mainly happening at the middle and under part of the biofiltration system, the removal of NOx get a high efficiency of 93.6% at the EBRT of 59s and the inlet NOxconcentration of 286.4 mg/m3 with 10% O2. A special biomembrane system was formulated by nitrobacteria, facultative denitrifying bacteria and aerobic denitrifying bacteria in the biofiltration system.
THE PROPERTIES FOR ORGANOBENTONITES TO ADSORB NAPHTHYLAMINE,NAPHTHOL AND ITS APPLICATION IN WASTEWATER TREATMENT
有机膨润土吸附水中萘胺、萘酚的性能及其应用

Zhu Lizhong,Li Yimin,Zhang Jianying,Wang Jue,
朱利中
,李益民,张建英,王珏

环境科学学报 , 1997,
Abstract: Backflushing is a useful technique to remove deposits and internal clogging of the membrane in membrane bioreactors and to increase the rate of permeate flux.An experiment was carried out to use filtered water for backflushing.An equation was derived for optimum backflush interval determination and it was tested in a crossflow ultrafiltration membrane bioreactor.This bioreactor was a laboratory scale system composed of activated sludge bioreactor with a hollow fiber membrane module.The equation is expressed as f(t)=(Q f- Q b)/( t f- t b).Based on this,an automatic control of optimum backflush interval can be accomplished with a computer control system.
生物-非生物煤炭脱硫新技术的研究
陈敏,徐复铭,吴宏翔,樊旭
环境科学 , 1995,
Abstract: 对生物-非生物煤炭脱硫的原理、菌种及操作条件等问题进行了探讨和实验研究。实验结果表明非生物-乳化技术与生物脱硫技术结合应用,大大提高了脱硫效率。在2—3d内煤炭黄铁矿硫去除率为53.2%,总硫去除率为32.7%。而且改变煤粒度或反应条件均会改变总硫去除率,最高可达47%(2d)。
Temperature and moisture distribution in biofilter packings
生物过滤填料层的温湿度场分布

YU Jianming,CHU Shuyi,WANG Jiade,
於建明
,褚淑祎,王家德

环境科学学报 , 2008,
Abstract: To optimize the structural design and control parameters of biofilters (BF), experiments were conducted to study the temperature and moisture distribution in the packings for H2S removal in the biofilter. The coupling relationship between the moisture in the packings and the inlet gas temperature as well as the axial distribution of the H2S concentration was investigated. The experimental results showed that, after the simulated waste gas with H2S is pumped into the BF, the temperature in the packings starts to increase, and the increase is greater at the lower parts than at the upper parts. The increase in temperature propagates from the bottom to the top and an axial temperature gradient forms after 12 operation days. Due to the heat conduction of the wall, a radial temperature gradient is also established. The transfer rate of moisture at the lower parts is much larger than that at the upper parts and finally an axial moisture gradient forms. As the inlet gas temperature increases, the moisture in the packings decreases exponentially. The H2S concentration gradually decreases along the axis from the bottom to the top. As the operation time increases, the H2S concentration at any point of the axis gradually increases.
Effects of Moisture content and pH on H2S Removal in a Biofilter
填料湿度、pH值对BF系统处理H2S废气的影响

WANG Jiade,GAO Zengliang,CHU Shuyi,CHEN Jianmeng,
王家德
,高增粱,褚淑祎,陈建孟

环境科学学报 , 2006,
Abstract: In order to optimize the design and operation of biofilters, effects of moisture content and pH on H2S removal in a biofiher have been studied in this paper. The experiment has reached following important results. The H2S removal efficiency in the biofiher decreased when the moisture content was below 45% and a proper moisture content ranging from 50% to 70% was essential to the biofilter for a long-term operation. The properties of the inlet gas such as gas velocity, relative humidity and temperature, interacted with the biological activities to change the moisture content in the biofiher, and under the conditions of this experiment, the maximum drying rate of packing was in proportion to the logarithm of relative humidity, 0.68 power of gas velocity and 0.8 power of temperature. Finally the effect of pH on the activity of H2S-oxided bacteria was obvious when the value of pH exceeded 8.0.
甲醛空气净化器及光催化降解甲醛的研究进展
Progresses on Formaldehyde Air Purifier and Photocatalytic Degradation of Formaldehyde
 [PDF]

曾晶, 江志成, 郑爱苹, 谢梦淋, 吴梦芹, 肖强
Journal of Advances in Physical Chemistry (JAPC) , 2016, DOI: 10.12677/JAPC.2016.54015
Abstract:
综述市售空气净化器消除室内甲醛污染的作用原理,分析应用光催化降解技术消除室内甲醛污染反应器的研究现状,讨论光催化技术降解室内气态甲醛的发展方向以及应用前景。
The paper summarizes the principle of elimination of indoor formaldehyde pollution in the com-mercialized air purifier. The status of the photocatalytic degradation reactor for the elimination of indoor formaldehyde pollution has been reviewed. The development direction and application prospects of photocatalytic degradation of indoor air formaldehyde are discussed.
Characteristics of Biofilm Phase During the Long-term Degradation of a Toluene-contaminated Gas Stream Using BTF
生物滴滤塔降解甲苯废气长期运行生物膜相特性研究

HU Jun,ZHENG Jiang-ling,WU Yue-xin,ZHANG Li-li,CHEN Jian-meng,
胡俊
,郑江玲,吴越新,张丽丽,陈建孟

环境科学 , 2012,
Abstract: This study analyzes the accumulation and distribution of biomass and changes in properties of biofilm in a long-term biotrickling filter (BTF) system in order to investigate the correlation between the biofilm phase properties and the performance. After a long-term operation of 130 days, the BTF showed a deterioration in degradation performance and an increase in pressure drop with a gradual increase of biofilm thickness and uneven distribution of biomass. Meanwhile, the porosity of the upper and lower layers decreased from 85% and 82% in the start-up period to 65% and 40%, respectively, as a result of the excessive accumulation of biomass and its non-uniform distribution. The AWCD values showed a decreasing trend indicating that the biological activity decreased with the aging of biofilm in the long-term BTF. The contents of total extracellular polymeric substances (EPS) and protein in the later period were twice as much as those in the start-up period. The value of protein to polysaccharide (PN/PS) ratio increased from 0.3 to 0.95, and showed positive correlation with the surface hydrophobicity of the biofilm, which increased from 33% to 73% accordingly. The mean molecular weight of EPS decreased during the operation of BTF. The result of FTIR further showed that the main chemical composition of EPS changed in the long-term BTF accordingly, possibly resulting in the deterioration of performance in the long-term BTF. The above experimental results could be very helpful for reducing the clogging and performance deterioration in long-term BTF.
A biofilter treating hydrogen sulfide with high load and gas velocity in intermittent mode
高气速间歇式生物过滤去除高负荷H2S

Wu Dan,Zhu Lin,Wang Jian,Liu Qiang,Tang Yin,Gui Juduo,
吴丹
,朱琳,王俭,刘强,唐音,桂居铎

环境工程学报 , 2013,
Abstract: 采用生物过滤法,以鸡粪堆肥和PE混合物为填料,在高气速条件下间歇式处理高负荷H2S废气。空床停留时间为20、15、10、6.7和5 s时,入口浓度3 000 mg/m3下的平均去除率分别为100%、100%、96.5%、89.2%和90.5%。高气速EBRT为5 s时,高入口负荷2 147 g/(m3·h)时的去除负荷为2 023 g/(m3·h),去除率达94%。采用Michaelis-Menten模型进行生物降解宏观动力学研究,其中Ks为550 mg/m3,Vm为6.8×104 g/(m3·d)。结果表明,在实验温度17~24℃,湿度30%~50%下,生物过滤法间歇式处理高气速高负荷H2S的去除性能好。
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