Accession Number : ADA184346

Title :   Carbon Dioxide Treatment for Scale Removal and Control in Potable Water Systems.

Descriptive Note : Final rept.,

Corporate Author : CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL

Personal Author(s) : Prakash,Temkar M. ; Neff,Chester H. ; Scholze,Richard J. ; Bandy,John T. ; Smith,Edgar D.

Report Date : MAY 1987

Pagination or Media Count : 59

Abstract : Carbon dioxide treatment for controlling and removing scale deposits in potable water systems has been investigated for potential application at Army installations. Scaling of water treatment systems is costly in terms of severe headloss and reduced carrying capacity of pipes, loss of heat transfer capacity in water heating systems, high operating costs due to inefficiencies, downtime and maintenance, and operational safety hazards. Conventional treatments for scale removal and control include mechanical and chemical methods. These methods are expensive and often ineffective; in addition, some chemical additives are unsafe, requiring special handling techniques and evacuation of building occupants during treatment. The Illinois State Water Survey has successfully field-tested a carbon dioxide treatment system. Treatment with controlled levels of carbon dioxide removed scale deposits safely and effectively; subsequent treatment kept the test pipes relatively scale-free while in service. However, one drawback is that overtreating a water system can result in corrosion due to dissolution of the scale and the protective coating on pipes.

Descriptors :   *WATER TREATMENT, *CHEMICALS, *CARBON DIOXIDE, SCALE, DRINKING WATER, PIPES, HEAT TRANSFER, HEATING, COSTS, MAINTENANCE, SAFETY, HAZARDS, WASTE WATER, ARMY FACILITIES

Subject Categories : Civil Engineering
      Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE