Water Practice Case Study

Wastewater Plant Upgrades in Eastern Sierra Mountain Region


Total Cost Savings Identified
Proposed Savings (kWh)
Proposed Savings (kW)

Main Problems

  1. Excessive aeration
  2. Excessive recirculation of activated sludge
  3. Sludge disposal


Plant Type

Activated Sludge

(with Plug Flow Aeration)

Plant Size (MGD)


The AESC team worked to improve this treatment plant’s energy efficiency while mitigating risk, increasing resiliency, and creating a more environmentally-sustainable operation. The team identified the following opportunities: dissolved oxygen-based operation of aeration blowers, right size aeration blowers, ammonia based aeration monitoring and control, lift pump optimization, and sludge management and disposal.

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