摘要:

Uncovered reservoirs are susceptible to contamination from many sources. One way to prevent contamination is to construct a roof for the reservoir. The concept of a floating roof is discussed. Such a floating cover is designed to prohibit algae, dirt and debris from entering the water, and it will also eliminate the problem of dead air space between the roof and water as may be found with conventional reservoir roof designs.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1975.tb00841.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

The temperature of a chlorine container, the surrounding room temperature, and cylinder size must be taken into consideration before withdrawal of chlorine gas. At a temperature of 65 degrees fahrenheit, the maximum desirable rate of withdrawal is about 40 lbs/day for 150‐lb cylinders and about 450 lbs/day for 2000‐lb containers.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1975.tb00842.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

Aluminum sulfate, also known as alum, must be handled with care in order to prevent injury. The dust may cause irritation to eyes, skin and mucous membranes. Protective clothing should be worn when handling alum. First aid procedures for minor alum‐induced irritations and guidelines for handling and storage of alum liquor are given.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1975.tb00843.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

Jar test procedures, significance, and test equipment are discussed. The jar test determines the most effective chemical coagulant or combination of coagulants for treatment of water from a particular raw water source.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1975.tb00844.x

出版商:Wiley    

年代:1975

数据来源: WILEY

摘要:

The use of analytical balances in laboratory analysis is discussed.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1975.tb00845.x

出版商:Wiley    

年代:1975

数据来源: WILEY