ISSN:0191-9512    

DOI:10.1080/01919517908550846

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Five new ozone, systems have been developed to make wool resistant to laundering shrinkage. Through rapid reaction, significant fiber degradation does not occur. Dyeing properties are improved and the fibers are somewhat bleached. In the most advantageous and energy-efficient process, steam is mixed with ozonea; garments, fabric, and sliver may be treated. Pilot or plant–scale treaters have been successfully tested for thrfee of the processes.

ISSN:0191-9512    

DOI:10.1080/01919517908550847

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

The processing of photographic images results in the discharge of I thousands of pounds of chemicals and millions of gallons of water each day in the U.S. alone. With ever increasing environmental regulations and the rising cost of chemicals, the photoprocessing industry has turned to ozone for chemical recovery and pollution control. While the recovery of silver from photographic solutions or effluents by ozonation has been studied, recycle of ferricyanide bleach is the major use of ozone today. In addition, ozone is being used for chemical destruction of processing solutions where reuse has not been practical.

ISSN:0191-9512    

DOI:10.1080/01919517908550848

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

The oxidation of dissolved fluorene and 9–fluorenone was studied in dilute aqueous media using ozone–oxygen systems. The efficacy of complete degradation of the titled polynuclear aromatics (PNA) was evaluated and the products were examined. Both PNA were readily oxidized, fluorene offering less resistance to ozone oxidation than 9–fluorenone. Partially oxidized PNA (e.g. hydroxylated PNA) were formed initially and were subsequently oxidized to produce aromatic dicarboxylic acids. Oxalic acid and to a small extent, an unknown aliphatic dibasic acid were the major end–products. The destruction of these aliphatic dibasic acids required longer periods of ozonation.

ISSN:0191-9512    

DOI:10.1080/01919517908550849

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Ozonation Ozonation is generally considered to improve biodegradation of water pollutants and this improvement in biodegradation is believed to bring about increased organic removal during activated carbon contacting. A review of the literature indicated that the effect of ozonation on biodegradation has not yet been studied in a thorough scientific manner and, therefore, our investigation was undertaken with this purpose in mind. Part I of the study consisted of ozonation followed by respirometric biodegradation studies. Ozonation was accomplished in a 3 m bubble column system capable of accurate O dosage measurements. Respirometric studies were done in an electrolytic respirometer. Total Organic Carbon, Chemical Oxygen Demand, Total Kjeldohe Nitrogen and nitrite plus nitrate were measured before and after each step. The following three substrates were used: (i) natural plus synthetic organic polluted river water, (ii) river water containing high level of natural organic substances, (iii) synthetic nitroaniline solutions. The results indicate that oxygen uptake and organic uptake during biodegradation are usually improved by ozonation, except in the case of (para nitroaniline). A new parameter indicative of the fraction of organics made biodegradable by ozonation is defined.

ISSN:0191-9512    

DOI:10.1080/01919517908550850

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Pilot plant studies were conducted in Brampton, Ontario, Canada to establish the optimum criteria for the ozone disinfection of effluents under various conditions of wastewater treatment plant operations. The effects of ozonation on the physical and chemical characteristics of the wastewater effluents were examined as well. More than 99‰ reductions of Total Coliform Fecal Coliform and Fecal Streptococci counts were achieved and some upgrading of the effluent in terms of COD and color were also attained.

ISSN:0191-9512    

DOI:10.1080/01919517908550851

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor