摘要:

AbstractTwo strategies for the cleanup of PCB‐contaminated soils are being developed: biodegradation by selected bacteria and extraction with aqueous surfactant solutions. Extensive biodegradation has been demonstrated byPseudomonas putidastrain LB400 in studies with Aroclor‐spiked laboratory soil and soil from a New York State site containing 525 ppm of transformed Aroclor 1242 (depleted of di‐ and trichlorobiphenyls). Solutions of sodium dodecylbenzenesulfonate can extract PCB from soils. A bench‐scale process with four countercurrent stages effected the cleanup of a heavy clayey soil. The PCB was recovered from the surfactant solution by precipitation with calcium chloride, reducing the mass of contaminated material to 3% of the original so

ISSN:0278-4491    

DOI:10.1002/ep.3300080113

出版商:American Institute of Chemical Engineers    

年代:1989

数据来源: WILEY

摘要:

AbstractA consistent methodology regarding major facets of enclosed landfill flare design is presented. A natural draft landfill gas (LFG) incinerator is an enclosed flare consisting of three parts: burner, damper, and stack. Such an incinerator will burn LFG at temperatures up to 1800°F without the need for support gas, or fans to provide draft. Modeling of actual heat release, draft, and stack velocity is a function of many parameters including stack height, incinerator temperature, ambient conditions, stack and damper area, frictional losses, flue molecular weight and heat capacity, among others. The involved variables are simplified to three dimensionless groups that depend on temperature and damper area alone. Graphs are presented for reference, along with a full analytical treatment for those who wish to develop comprehensive modeling

ISSN:0278-4491    

DOI:10.1002/ep.3300080114

出版商:American Institute of Chemical Engineers    

年代:1989

数据来源: WILEY

摘要:

AbstractThe goals of this research are to develop an understanding of the transport phenomena that occur during the desorption of contaminants from soil and to obtain rate information. This information can then be used to develop a model to predict the performance of full‐scale thermal treatment systems for optimization and cost reductio

ISSN:0278-4491    

DOI:10.1002/ep.3300080115

出版商:American Institute of Chemical Engineers    

年代:1989

数据来源: WILEY

摘要:

AbstractFive process unit operations were evaluated for effectiveness in treating aqueous effluent from a hazardous waste treatment facility. The aqueous effluent contained residual amounts of various organics and heavy metals. The objective of the pilot test program was to produce an aqueous product which could meet requirements for discharge to a POTW, or directly to the environment, and a solid product which could be disposed of in a Class I landfill. Processes evaluated included one primary, evaporative crystallization, two secondary, activated sludge bio‐treatment and reverse osmosis, and two tertiary, carbon adsorption and ultraviolet peroxidation. Test results from these process operations identified several processing configurations whereby the final treated product could meet discharge criteria. Performance results of each process unit operation are summarized and discusse

ISSN:0278-4491    

DOI:10.1002/ep.3300080116

出版商:American Institute of Chemical Engineers    

年代:1989

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.3300080117

出版商:American Institute of Chemical Engineers    

年代:1989

数据来源: WILEY

ISSN:0278-4491    

DOI:10.1002/ep.3300080101

出版商:American Institute of Chemical Engineers    

年代:1989

数据来源: WILEY