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Technical Issues
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5.4. Technical Issues
The lack of automatic monitoring of control parameters constrains treatment performance. For example, the absence of monitoring devices for dissolved oxygen in the aeration tanks results in significant variance from optimum DO levels (4 mg/l instead of the effective level of 2 mg/l). This can result in excessive energy usage and associated expenses in this example or in other areas, inadequate treatment (Ref 5, Annex 6, pg. 26).
The processes are not automated and adjustments are made manual under the direction of the Chief Engineer based on the results of sample analysis conducted by the on-site laboratory. Flow measurement and control is limited so such adjustments are restricted.
