ISSN:0278-4491    

DOI:10.1002/ep.670050202

出版商:American Institute of Chemical Engineers    

年代:1986

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670050203

出版商:American Institute of Chemical Engineers    

年代:1986

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670050204

出版商:American Institute of Chemical Engineers    

年代:1986

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.670050205

出版商:American Institute of Chemical Engineers    

年代:1986

数据来源: WILEY

摘要:

AbstractThe response of sequencing batch reactors (SRB's) in an industrial application was investigated. Four bench‐scale SBR's and a bench‐scale conventional activated sludge unit were operated with wastewater from a petrochemical complex. In terms of the degradation of BOD material and nitrification, the performance of the SBR's was comparable or slightly superior to that of the conventional activated sludge unit. However, for high strength wastes with BOD5>300 mg/l and under organic shock loading conditions, effluent from an SBR may have a high solids content as a result of abundant dispersed‐cells growth. The SBR reacted well to a series of phenolic shock loadings; phenols were degraded from initial concentrations ranging from 200 to 950 mg/l to<0.1 mg/l. A model of the SBR, which incorporated the Monod kinetics, was presented as a desig

ISSN:0278-4491    

DOI:10.1002/ep.670050206

出版商:American Institute of Chemical Engineers    

年代:1986

数据来源: WILEY

摘要:

AbstractNone of the congressional bills proposed to control acid deposition since 1981 can be considered a cost‐effective approach. Ways to improve spatial, temporal, and regulatory efficiency in choosing which emission sources to control are examine

ISSN:0278-4491    

DOI:10.1002/ep.670050207

出版商:American Institute of Chemical Engineers    

年代:1986

数据来源: WILEY

摘要:

AbstractA detailed engineering evaluation of the potential for using an absorption on spent shale process (ASSP) for controlling sulfur emission from oil shale plants was completed. The evaluation analyzes the potential effectiveness and cost of absorbing SO2on combusted spent shale in either a fluidized bed combustor (FBC) or a fluidized transport system (lift pipe) for three retorting processes: Lurgi (lift pipe), Union C (FBC), Modified In Situ (FBC).Conceptual designs were completed for the three retorting processes and the costs of removing SO2by the ASSP approach were compared to the costs of removing either H2S (including other sulfur species such as mercaptans and thiophenes) or SO2by the leading conventional sulfur removal processes. A number of significant process variables were identified and evaluated in the study. The study was performed under contract with the U.S. Environmental Protection Agency.

ISSN:0278-4491    

DOI:10.1002/ep.670050208

出版商:American Institute of Chemical Engineers    

年代:1986

数据来源: WILEY

摘要:

AbstractStrategies for regulating toxic and hazardous air pollutants have technical bases ranging from threshold limit values for chemicals, to emissions ceilings based upon ambient concentrations. Each strategy has advantages, technical limitations, and policy implications. Major options being considered for amending the Clean Air Act are reviewed.

ISSN:0278-4491    

DOI:10.1002/ep.670050209

出版商:American Institute of Chemical Engineers    

年代:1986

数据来源: WILEY

摘要:

AbstractAnionic polyacrylamide was used to flocculate kaolin slurries. Both linear and branched polyacrylamide were polymerized. The polymer samples were fractionated and the molecular weights determined on the fractionated samples. The molecular weight range studied varied from 10,000 to 3,000,000. Each polyacrylamide sample was hydrolyzed to anionic levels ranging from 5 to 25 percent. The flocculating performance of the above polymers was measured on kaolin slurries using both settling tests with 3% kaolin and jar tests with 200 ppm kaolin. The effect of anionic polyacrylamide conformation on the flocculating rates was determined by varying the pH and hydrolysis level. The effect of the polymer configuration was studied by varying the molecular weight and using both linear and branched samples. In every case tested the linear polyacrylamide was a more effective flocculant than the branched polymer. The polyacrylamide effectiveness increased with increasing molecular weight for both the linear and branched samples tested. Increasing the mean end‐to‐end distance of the dissolved polymer molecular increased its flocculating effectiveness. This increased length could be accomplished by changing either the pH or the hydrolysis level. The results of the study were the same whether settling tests or jar tests were used as a performance crite

ISSN:0278-4491    

DOI:10.1002/ep.670050210

出版商:American Institute of Chemical Engineers    

年代:1986

数据来源: WILEY

摘要:

AbstractAqueous Film Forming Foam (AFFF) is the most effective fuel/oil fire fighting agent. Wastewater generated from firefighting training facilities contains mixtures of AFFF, residual free fuel oil, emulsified fuel oil, gasoline, purple K (PKP), and miscellaneous combustion products. Membrane treatment of these wastewaters by a two stage ultrafiltration (UF) and reverse osmosis (RO) process appearas economically attractive. Cost effectiveness of the membrane process is compared with a rotating biological contactor (RBC) and a carbon adsorption system.

ISSN:0278-4491    

DOI:10.1002/ep.670050211

出版商:American Institute of Chemical Engineers    

年代:1986

数据来源: WILEY