摘要:

Preozonation of biologically or physically–chemically treated wastewater effluents, followed by passage through granular activated carbon (GAC) for tertiary wastewater treatment was studied at the Duck Creek Wastewater Treatment in Garland, Texas. Whereas the average period of operation for the GAC before exhaustion without ozone pretreatment was 70 days, pretreatment with ozone or with oxygen alone extended GAC operation to at least 480 days, withoutexhaus–tion. Effluent streams consistently metapplicable discharge standards during this period of time, without the necessity of regenerating the GAC.

ISSN:0191-9512    

DOI:10.1080/01919518508552319

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Only two water works in the UK apply ozone at present as part of their treatment, onefor taste and odor control and theother forcolor removal. Forthetwo applicationus ozone was the most economical option at thetime theplants were installed andozone has been successful for the purpose for which it was designed.

ISSN:0191-9512    

DOI:10.1080/01919518508552320

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

A new anti-biofouling ozone system which intermittently supplies high-concentration ozone was demonstrated to be effective for preventing marine biofouling in test cooling tubes (titanium, aluminum brass and epoxy-coated PVC) simulating condenser and intake conduit systems of power plants. Injection of ozone of about 5 mg/L for five minutes once each day was enough to keep them clean. Corrosion of titanium and aluminum brass tubes after the three-month test was found tobe negligible.

ISSN:0191-9512    

DOI:10.1080/01919518508552321

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

This paper describes the singular and composite effects of two catalysts; ultraviolet (UV) light and ultrasound (US) on the ozone (O3) oxidation of a purified solution of a commercially available humic acid with the objective of minimizing trihalomethane formation potential (THMFP). The principal findings are that (1) the most effective reactor conditions for both thedestruction of nonvolatile total organic carbon (NVTOC) and THMFP utilized both US and UV in combination with ozon, and (2) bicarbonate alkalinity reduces the oxidation efficiency of the US–UV–O3system apparently asa consequence ofradical scavenging.

ISSN:0191-9512    

DOI:10.1080/01919518508552322

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The efficiency of ozone for different purposes can be determined by different laboratory tests. It is necessary to use a specific test for each aim of ozonation. Consequently, the design of commercial ozone–water contact systems can be determined in relation with the purpose of ozonation: virucide effect, oxidation of pollutant, clarification improvement or wastewater disinfection.

ISSN:0191-9512    

DOI:10.1080/01919518508552323

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

A fully automated system is controlling a two-stage ozonation system treating 140 × 103m3/h (6.4 mgd) of potable water in a full-scale water treatment plant. A supervisory computer has a data communications path to each of six ozone generators and a direct link to the ozone destruct system. Total ozone requirement is calculated, the most power-efficient equipment configuration is selectedt and the flow of ozone to each contactor is controlled. Inaddition, graphic display ofequipment status and process variables is provided system events are logged, and strip charts and reports are produced.

ISSN:0191-9512    

DOI:10.1080/01919518508552324

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

ISSN:0191-9512    

DOI:10.1080/01919518508552318

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor