Civil Engineering Reference
In-Depth Information
Design summary and drawings, as well as specifications
•
Normal operating time for intermittently operated processes, such as filter back-
washing and residuals handling
•
Utility bill schedule and possible alternative schedules
•
Water treatment plant water quality standards
•
Information from previous pump, lighting, and HVAC (heating, ventilation, and
air conditioning) audits or testing
•
Description of finished water storage facilities
•
Based on plant data obtained, the ''big picture'' can be determined for water treat-
ment facilities in terms of unit energy consumption (energy consumed per million
gallons of water treated). Typical values for various types of water treatment plants
are shown in Figure 30-5. Plants with unit energy consumption in the lower range for
their category would be considered energy efficient and may not need a detailed energy
evaluation. Those in upper ranges for their category could potentially benefit from a
detailed evaluation.
Evaluate Utility Bills and Schedules
Unfortunately, most people at water utilities do not understand energy costs or how
those costs are billed. In fact, supervisors and managers at many plants never see
2,000
1,500
1,000
500
0
Plants with
125-psi High
Service
Pumps
Fig. 30-5.
Ranges of unit power consumption for typical water treatment plants
Plants with
75-psi High
Service
Pumps
Plants with
100-psi High
Service
Pumps
