摘要:

AbstractThe adsorptive capacities of activated carbon for major organic constituents (target compounds) of a wide variety of wastewater were measured in pure water and in actual wastewater samples. Competitive adsorption due to the presence of other orgnic components of total organic carbon of the wastewater (background TOC) reduced carbon capacities for all target compounds in the wastewaters from the respective pure water isotherms. The capacity reduction for a target compound was found to depend on the relative adsorptivity of the target compound versus competing compounds (poorly adsorbed TOC components produced a small reduction in capacity for a more strongly adsorbed target compound), and the fraction of the background TOC attributable to the target compound. Those findings were validated by carbon column adsorption breakthrough data.

ISSN:0278-4491    

DOI:10.1002/ep.670090111

出版商:American Institute of Chemical Engineers    

年代:1990

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670090102

出版商:American Institute of Chemical Engineers    

年代:1990

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670090103

出版商:American Institute of Chemical Engineers    

年代:1990

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670090104

出版商:American Institute of Chemical Engineers    

年代:1990

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670090107

出版商:American Institute of Chemical Engineers    

年代:1990

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670090108

出版商:American Institute of Chemical Engineers    

年代:1990

数据来源: WILEY

摘要:

AbstractAs new programs are initiated by industry and federal or state regulatory agencies to reduce releases of hazardous air pollutants and reactive volatile organic compounds into the atmosphere, there are increasing questions over the loss of organic compounds from fugitive sources, the best method to estimate these losses, and the factors that influence these losses. The presently established method is to use generalized emission factors for each specific piece of equipment comprising a process unit. The accuracy of the estimates obtained using the available emission factors depends upon two features. These are first, the precision and accuracy of the actual emission factors or correlations themselves, and second, the resemblance of the systems from which the correlations were developed to those for which they will be applied.

ISSN:0278-4491    

DOI:10.1002/ep.670090112

出版商:American Institute of Chemical Engineers    

年代:1990

数据来源: WILEY

摘要:

AbstractAs part of DOE's Clean Coal Technology program, a field evaluation of Gas Reburning‐Sorbent Injection (GR‐SI) technology is being carried out by Energy and Environmental Research Corporation. The project is cofunded by the Gas Research Institute and the State of Illinois Department of Energy and Natural Resources. GR‐SI technology is applicable to the control of emissions of acid rain precursor species, oxides of nitrogen and sulfur from coal fired utility boilers. Three units representative of pre‐NSPS design practices, a 117 MWewall, a 71 MWetangentially, and a 33 MWecyclone fired boiler located in Illinois will be the host sites for this three‐phase demonstration project.Process specification studies have confirmed that GR‐SI technology is capable of achieving the stated goals of the project, 60 percent reduction in NOxand 50 percent reduction in SO2emissions. NOxemissions will be reduced by staged fuel addition using natural gas as the reburn fuel, while SO2emissions will be reduced by capturing sulfur by dry, calcium based sorbent injection which will be augmented by the displacement of about 15–20 percent of the coal input by natural gas firing.Phase 1, Design and Permitting, was completed earlier this year. In addition to process specifications which focused on injection system design criteria and precipitator enhancement approaches, detailed environmental information has been developed, including the assessment of waste disposal options and performing permitting work. In phase 2 of the project, anticipated to be initiated in 1989, installation and check‐out will be performed. The project will culminate in sustained 12‐month demonstrations of the technology on each host unit. Results of Phase 1 and plans for subsequent work

ISSN:0278-4491    

DOI:10.1002/ep.670090113

出版商:American Institute of Chemical Engineers    

年代:1990

数据来源: WILEY

摘要:

AbstractThe removal of four volatile organic compounds from aqueous solution by air stripping using a cascade crossflow device has been studied. This method of operation gave mass transfer coefficients and removal efficiencies quite similar to those achieved in conventional countercurrent operations. However, in terms of reduced pressure drops and greater range of stable operation, the advantages of the cascade crossflow device far outweigh those of the conventional countercurrent stripper.

ISSN:0278-4491    

DOI:10.1002/ep.670090114

出版商:American Institute of Chemical Engineers    

年代:1990

数据来源: WILEY

摘要:

AbstractChevron Richmond Research Center (RRC), located in Richmond, California, conducts research and technical service in the fields of petroleum and petrochemical products, processes, and related matters. To assure proper disposal of all wastes generated, RRC has implemented a unique waste disposal system. The system entails the use of specific disposal procedures and color‐coded waste receptacles for the different types of wastes. Communication with employees is vital for successful use of the waste disposal system. A written waste mangement plan documents the achieved and the projected reductions in wasted generation. Most of the hazardous waste reductions realized prior to 1989 were from installation of equipment and offsite recycling. Much of the future reductions are expected to come from changes in laboratory procedures and practices. The ultimate goal is to increase employee environmental awareness so that waste minimization is a routine part of every jo

ISSN:0278-4491    

DOI:10.1002/ep.670090115

出版商:American Institute of Chemical Engineers    

年代:1990

数据来源: WILEY