Two coling water formulations were created using the principles discussed so far. The process consisted of the following steps:
Analysis of the water proposed for use in the system
Survey of pretreatment and post treatment to evaluate any potential interactions
Entering data into computer program and generating scale forming tendency graphs
Survey of monitoring and pretreatment equipment and suggesting necessary improvements.
Creation of formulation based on corrosion, scale and biological fouling potential, and chemical interaction potential
Bench testing of formulation to test for stability and suitability
Field trial
The product development model outlined here for synthetic or recycled waters differs from the standard development model in several important ways. The important differences are the emphasis on avoiding potential interaction, monitoring, and the use of computer software to predict potential for multiple chemical interactions.
The first case illustrates the differing scaling potential of two well waters for which one formulation had to be created. In well #2 water silica is limiting cycles. Well #1 water had moderate levels of silica, but was high nitrate and phosphate, indicating a potential for calcium phosphate scale. In this case high silica dictated the use of a silica control polymer. Excellent calcium and silica control was provided by PBTC and terpolymer. Three years later, silica is still being removed and between 250 and 300 ppm of silica is maintained in the system.
| Parameter | Well Water 1 | Well Water 2 |
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