检索结果-南通市图书馆

Performance of biotrickling filters packed with structured or cubic polyurethane sponges for VOC removal

Journal of Environmental Sciences 2011年第8期23卷 1325-1333页

作者： Chunping Yang Guanlong Yu Guangming Zeng Haining Yang Fayuan Chen Congying Jin College of Environmental Science and Engineering Hunan University Hunan 410082 China. College of Environmental Science and Engneering Zhejiang Gongshang University Hangzhou 310012 China Key Laboratory of Environmental Biology and Pollution Control Hunan University Ministry of Education Hunan 410082 China

Two identical bench-scale biotrickling filters （BTFs）, BTF 1 and BTF 2, were evaluated for toluene removal at various gas empty bed contact times （EBCTs） and organic loadings. BTF 1 and BTF 2 were packed with structured and cubic synthetic polyurethane sponges, respectively. At a constant toluene loading of 16 g/（***）, toluene removal efficiencies decreased from 98.8% to 64.3% for BTF 1 and from 98.4% to 74.1% for BTF 2 as gas EBCT decreased from 30 to 5 sec. When the toluene loading increased from 35 to 140 g/（***） at a gas EBCT of 30 sec, the removal efficiencies decreased from 99.1% to 77.4% for BTF 1 and from 99.0% to 81.5% for BTF 2. The pressure drop for both BTFs increased with increased air flow rate, and did not significantly vary while the toluene loading was increased under similar operation conditions. BTF 1 and BTF 2 could start up successfully within 19 and 27 days, respectively, when packed with fresh sponge media, and the performances could be restored in 3-7 days after biomass was removed and wasted from the media. BTF 2 displayed higher removal efficiency even under shorter EBCT or higher loading rate than BTF1 when other operation conditions were similar, while it showed lower pressure drop than BTF 1 during the whole period of operation. These results demonstrated that both BTFs could treat waste gas containing toluene effectively.

关键词： biofiltration biotrickling filter elimination capacity empty bed contact time sponge volatile organic compound

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Removal of disinfection by-products formation potential by biologically intensified process

引用

Journal of Environmental Sciences 2005年第2期17卷 315-318页

作者： ANDong LIWei-guang CUIFu-yi HEXin ZHANGJin-song SchoolofMunicipalandEnvironmentalEngineering HarbinInstituteofTechnologyHarbin150090China ShenzhenWaterGroup Shenzhen518031China

The removal of disinfection by-products formation potential(DBPFP) in artificially intensified biological activated carbon(IBAC) process which is developed on the basis of traditional ozone granular activated carbon was evaluated. By IBAC removals of 31% and 68% for THMFP and HAAFP were obtained respectively. Under identical conditions, the removals of the same substances were 4% and 32% respectively only by the granular activated carbon(GAC) process. Compared with GAC, the high removal rates of the two formed potential substances were due to the increasing of bioactivity of the media and the synergistic capabilities of biological degradation cooperating with activated carbon adsorption of organic compounds. A clear linear correlation(R 2=0.9562 and R 2=0.9007) between DOC HAAFP removal rate and empty bed contact time(EBCT) of IBAC process was observed, while that between THMFP removal rate and EBCT of GAC was R 2=0.9782. In addition certain linear correlations between THMFP, HAAFP and UV 254 (R 2=0.855 and R 2=0.7702) were found for the treated water. For IBAC process there are also more advantages such as long backwashing cycle time, low backwashing intensity and prolonging activated carbon lifetime and so on.

关键词： intensified biological activated carbon(IBAC) disinfection by-products formation potential(DBPFP) empty bed contact time water treatment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A review on treatment of disinfection byproduct precursors by biological activated carbon process

引用

Chinese Chemical Letters 2022年第10期33卷 4495-4504页

作者： Jie Fu Ching-Hua Huang Chenyuan Dang Qilin Wang School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Civil and Environmental Engineering Georgia Institute of TechnologyAtlantaGA 30332United States Center for Technology in Water and Wastewater School of Civil and Environmental EngineeringUniversity of Technology SydneySydneyNew South Wales 2007Australia

Disinfection by-products(DBPs)in water systems have attracted increasing attention due to their toxic *** of precursors(mainly natural organic matter(NOM))prior to the disinfection process has been recognized as the ideal strategy to control the DBP ***,biological activated carbon(BAC)process is a highly recommended and prevalent process for treatment of DBP precursors in advanced water *** paper first introduces the fundamental knowledge of BAC process,including the history,basic principles,typical process flow,and basic operational ***,the selection of BAC process for treatment of DBP precursors is explained in detail based on the comparative analysis of dominant water treatment technologies from the aspects of mechanisms for NOM removal as well as the treatability of different groups of DBP ***,a thorough overview is presented to summarize the recent developments and breakthroughs in the removal of DBP precursors using BAC process,and the contents involved include effect of pre-BAC ozonation,removal performance of various DBP precursors,toxicity risk reduction,fractional analysis of NOM,effect of empty bed contact time(EBCT)and engineered ***,some recommendations are made to strengthen current research and address the knowledge gaps,including the issues of microbial mechanisms,toxicity evaluation,degradation kinetics and microbial products.

关键词： Disinfection byproduct precursor Biological activated carbon Formation potential Natural organic matter empty bed contact time Ozonation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Arsenite Removal from Simulated Groundwater by Biogenic Schwertmannite: A Column Trial

引用

Pedosphere 2013年第3期23卷 402-408页

作者： XIE Yue ZHOU Li-Xiang Department of Environmental Engineering College of Resources and Environmental Sciences Nanjing Agricultural University

To assess the feasibility of biogenic schwertmannite to act as a sorbent for removing arsenite from groundwater, a series of biogenic schwertmannite-packed column adsorption experiments were conducted on simulated As（III）-containing groundwater. empty bed contact time （EBCT）, As（III） concentration in effluent, and the removal efficiency of As（III） through the column were investigated at pH 8.0 and temperature 25 ± 0.5 ℃. The results showed that the breakthrough curves were mainly dependent on EBCT values when the influent As（III） concentration was 500 μg L-1 and the optimum EBCT was 4.0 min. When the effluent As（III） concentration reached 10 and 50 μg L-1, the breakthrough volumes for the schwertmannite adsorption column were 4200 and 5600 bed volume （BV）, with As（III） adsorption capacity of 2.1 and 2.8 mg g-1, respectively. Biogenic schwertmannite could be regenerated by 1.0 mol L-1 NaOH solution, and more than 80% of As（III） adsorbed on the surface of schwertmannite could be released after 3 successive regenerations. The breakthrough volume for the regenerated sehwertmannite-packed column still maintained 4 000-4 200 BV when the As（III） concentration in effluent was below 10 μg L-1. Compared with other sorbents for As（III） removal, the biogenic schwertmannite- packed column had a higher breakthrough volume and a much higher adsorption capacity, implying that biogenic schwertmannite was a highly efficient and potential sorbent to purify As（III）-contaminated groundwater.

关键词： adsorption capacity As(III) breakthrough volume empty bed contact time sorbent

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improving AOC degradation rate by intensified biological process in advanced water treatment

引用

Journal of Harbin Institute of Technology(New Series) 2007年第1期14卷 93-96页

作者：安东李伟光宋佳秀崔福义 School of Municipal and Environmental Engineering Harbin Institute of Technology Shanghai Normal University

The object of is to evaluate assimilable organic carbon（AOC） degradation rate by intensified biological technique in advanced water treatment. By artificially acclimating and cultivating strains attached onto carbon surface, the selected strains can be intensified for their degradation to organic matters. The research indicates that ozonation process increases AOC concentration considerably, however, it is beneficial to microdegradation. Temperature and empty bed contact time （ TEBC ） are two important factors affecting microbiology. From 14 to 27 ℃, intensified biological carbon can remove AOC better compared with granular activated carbon （GAC）. Under identical TERC, intensified technique increases more than 10% AOC reduction.

关键词： activated carbon assimilable organic carbon empty bed contact time advanced water treatment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：