415 

 

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Reduced non-renewable energy use: Reduced non-renewable energy use by 33,625 MMBtu per 
year 

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Reduced greenhouse gas emissions as a result of renewable energy utilization: Reduced 
greenhouse gas emissions by 6,926 metric tons. 
 

NUTRIENT & MATERIALS RECOVERY 

 

Materials recovery strategy established and communicated with utility employees  

 

Adequate staffing to support materials recovery program (contractual or in-house)  

 

Market assessment conducted for recovered materials  

 

Contracts or agreements in place for materials provision  

 

Ongoing exploration and evaluation of materials recovery opportunities  

Biogas Recovery and Reuse – Final contract negotiations underway with a private contractor to recover, 
clean and reuse biogas.  Recovered biogas will be used to supplement the grid. 

Actively managing WERF project NTRY9T15, Sustainable Struvite Control Using Residual Gas from 
Digester Gas Cleaning Process. 

Final contract negotiation stages underway with Ostara for phosphorus harvesting with revenue 
generated from the sale of recovered phosphorus. 

Total trihalomethane abatement through the beneficial use of centrate side stream as a source of 
ammonia for controlled chloramination which subsequently reduces chemical chlorine usage. 

Performing a multi-site residual sulfite study for the Arizona Department of Environmental Quality to 
revise the operational performance and analysis of residual chlorine for reducing chemical usage and 
minimizing chemical discharge to the environment. 

Actively engaged with the University of Arizona, LIFT and Test-Bed Network to pilot and evaluate new 
technologies for nutrient recovery and sale. 

Performance Measures & Results 

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Biogas recovery and resale: Cease flaring of excess methane while generating revenue of 
approximately $175,000 annually. 

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Struvite mitigation: Reduction in ferric chloride usage and struvite related maintenance 
activities for an estimated savings of $150,000 annually. 

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Struvite harvesting for resale: Estimated revenue will be $150,000 annually. 

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THM abatement: Documented reduction in hypochlorite usage and bisulfite usage for an 
estimated savings of $250,000 annually. 

 

WATER REUSE 

 

Board/executive management reuse strategy established 

 

Communications and outreach plan developed and implemented  

 

Ongoing market assessment of reused water to public/private and public/public entities 

 

Investments in reuse infrastructure