摘要:

Water treatment plant sludge consists primarily of the solids that are found in raw water. These solids include colloidal materials, organic and inorganic solids, algae and viruses, and treatment chemicals. Treatment chemicals, which are added to the water during a specific treatment process, cause any solids present in the water to settle out. There are various types of water treatment processes, and each process produces a characteristic type of sludge. This paper discusses the following areas related to water treatment sludges: sources of sludge, sludge removal, and sludge disposal alternatives. Sludge lagoons, mechanical dewatering, and disposal of dried sludge are addressed.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1988.tb01189.x

出版商:Wiley    

年代:1988

数据来源: WILEY

摘要:

The ability to forecast electrical shorts is not an exact science, but shorts can be predicted in some instances. An insulation tester, or megger, is a tool that can be used to help prevent a short before it occurs. A megger can also show a loss of electricity within a motor and/or the leads to that motor. This article discusses the use of meggers for testing motors.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1988.tb01190.x

出版商:Wiley    

年代:1988

数据来源: WILEY

摘要:

This article describes the construction and use of a fire hydrant drainer which is helpful in draining fire hydrants that have plugged drain holes.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1988.tb01191.x

出版商:Wiley    

年代:1988

数据来源: WILEY