摘要:

In spite of being the most basic of water‐treatment processes, filtration today remains as much an art as a science. This article presents experience, available formulas, and design criteria to aid in more economical filter design and Operation. Parts 2 and 3 of this article will be presented in later issues of the Journal.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1975.tb02291.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

After a New York study was completed, it was determined that plankton organisms and amorphorous matter are more effectively removed by diatomite filtration than microscreening only and that microscreening, as a pretreatment process to diatomite and slow sand filtration, be considered for filtration efficiency.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1975.tb02292.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

Various alloys were exposed in quiescent potable water for periods up to fifteen years. Although average corrosion rates were low, a number of interesting instances of significant localized damage were observed. The alloys so affected were aluminum bronze, nickel‐copper, manganese bronze, type 416 stainless steel, and galvanized iron.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1975.tb02293.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

During a study to determine mixing intensity, four groups of jars‐test Systems were utilized and mean velocity gradient, turbulent gross drag coefficient, and Reynolds and Power numbers were calculated. It was concluded that the same G, or mean velocity gradient, values could be produced by impellers of different shapes as long as projected areas were the same.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1975.tb02294.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

A long‐term study was made on the qualitative and quantitative recovery efficiency of the carbon adsorption method vs that of a continuous liquid‐liquid extraction method for several chlorinated hydrocarbon pesticides. Water from the Mississippi River, upstream from New Orleans, was extracted by both methods, and comparative results indicate that the latter method may be more efficient.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1975.tb02295.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

This study evaluates the effectiveness of a lime coagulation, lime, and limesoda ash softening in the removal of lead. The treatment processes were simulated at laboratory scaie oh a variety of waters having synthetically developed Chemical characteristics. All Systems reduced lead levels to 0.05 mg/l; however, alum coagulation was effective only in the pH range 8–9, not at near neutral values. Chemical softening in the solids‐contact mode resulted in virtually complete removal of lead.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1975.tb02296.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

This article presents results of an investigation involving bacterioflora that influence the creation of ochre, or iron ore, in the Ranney wells in Belgrade, Yugoslavia. The qualitative and quantitative relations of the bacteria are discussed in relation to the physicalchemical characteristics of the water, specific yield, seasonal Variation, and other parameters.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1975.tb02297.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

After research began to determine algal growth potential in potable water supplies, a “bonus” study also occurred involving metal concentrations. The following summarizes the results of the incidental study and compares them with limits proposed or set by various Standards.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1975.tb02298.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

Defined and discussed here are both disadvantages and adyantages afforded the consumer in the use of PVC pipe.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1975.tb02299.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

The comment pertains to an article that appeared in the Jun. 1973Journal AWWAauthored by Jesse H. Barlow and entitled “Sludge Handling and Disposal.”

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1975.tb02290.x

出版商:Wiley    

年代:1975

数据来源: WILEY