摘要:

What happens when air gets in a pipeline? How can air pockets in a pipeline affect your distribution system operations? These questions underscore one of the most misunderstood phenomena in water supply today. Many operational problems, particularly at the time of initial startup of a pipeline, are blamed on inadequate thrust blocking, improper pipeline bedding, and the like. Broken pumps, valves, pipe, and faulty instrumentation readings are a few examples of the kinds of difficulties that may be attributed to poor installation practices. Many of these problems, however, are not caused by improper pipeline installation but by failure to remove air from the line. When air is allowed to accumulate in pressurized pipeline, efficiency is sacrificed and serious damage can occur. Removal of air from a pipeline will not solve all surge and efficiency problems. However, the elimination of air can solve one of the most common causes of these problems.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1994.tb01192.x

出版商:Wiley    

年代:1994

数据来源: WILEY

摘要:

The uses and capabilities of computers continue to grow at an exponential rate. Operators can conduct well field modeling, develop “what if” scenarios involving plant operations, perform chemical usage studies and cost and productivity analyses, and a wide variety of other tasks. There is no doubt that by training operators to fully use computer technology, you will improve your overall plant operations. Learning how to use a computer is not difficult; in fact, it can be fun and quite satisfying. Many operators train themselves or attend evening classes. City of Pasco supervisors encourage operators to learn about computers with tuition reimbursement for completed classes. The cost of computer training is rapidly repaid by the employee's increased productivity and morale.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1994.tb01193.x

出版商:Wiley    

年代:1994

数据来源: WILEY

摘要:

In past years the City of Hutchinson, Kansas, Water Department used a chlorine system that required two injectors at each well site. Because of a change in state regulations, chlorine injection into a well is prohibited (except in emergencies). Instead, injection must be made into the main located outside of the well house. The change in regulations prompted water department employees to design a series of valves that would enable chlorine injection to be accomplished through a one‐injector system.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1994.tb01194.x

出版商:Wiley    

年代:1994

数据来源: WILEY

摘要:

Distribution system maintenance, which is generally taken for granted by most customers, is one of the more challenging budget line items. Budget decisions are easier when they are based on complete and easily understood data. Remember, these records only show distribution requirements; they do not reflect customer satisfaction. There is no amount of money that can be budgeted to reflect the satisfaction of time saved, a job well done, and a community that trusts its drinking water supply is dependable and safe.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1994.tb01195.x

出版商:Wiley    

年代:1994

数据来源: WILEY

摘要:

The article lists the question of the month from AWWA's SSOS Hotline. This month's question is on identifying the cause of taste and odor problems in water. The article discusses identifying risks and preventing problems.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1994.tb01196.x

出版商:Wiley    

年代:1994

数据来源: WILEY