Brown and Caldwell to design waste-to-energy upgrades at wastewater treatment facility

Dec. 16, 2019
Wastewater facility to significantly reduce greenhouse gas emissions via biogas recycling.

The Derry Township Municipal Authority (DTMA) selected Brown and Caldwell, an environmental engineering and construction firm, to design energy efficiency improvements at its Clearwater Road Wastewater Treatment Facility (WWTF).

Already accepting organic waste from third-party carriers, the authority is developing long-range plans to maximize the capability to receive additional organic wastes. Facility upgrades are considered key to expanding capacity and increasing energy efficiency, thus evolving the 5.02 million gallons per day WWTF into a highly sustainable operation.

Under DTMA’s $15 million energy enhancement program at the WWTF, Brown and Caldwell will lead the design of a combined heat and power (CHP) facility capable of burning biogas that will power two generator engines. After pairing with a new gas conditioning system for high-quality fuel production, the CHP facility will integrate into the WWTF’s existing electrical and heating system to provide electricity and heat throughout. Brown and Caldwell will assist DTMA with the procurement of the engines through COSTARS, the Commonwealth of Pennsylvania's cooperative purchasing program.

Other improvements include a conveyance system to transport gas throughout the facility, sludge blending tank enhancements to maximize energy recovery via biogas generation and secondary digester modifications for future conversion to a primary digester.

“Increasing the production and beneficial use of anaerobic digester biogas as our fuel source to provide power and heat is significantly more efficient and environmentally sustainable than using electrical power from the grid or fossil fuels,” said DTMA Executive Director Wayne Schutz. “The Authority has a strong interest in fully reusing our resources, and this project meets numerous objectives within DTMA’s core values to maintain and improve our facilities without impacting our ratepayers while propelling future sustainability.”

A multidisciplinary team led by Brown and Caldwell includes RK&K, who will provide electrical and instrumentation expertise, and Bassett Engineering, who will assist with permitting, site design and stormwater control.

Upon completion of improvements, the WWTF will increase biogas power generation from 280 to 1,600 kilowatt’s per hour, significantly reducing the facility's carbon footprint.

“We applaud DTMA for embarking on this important program to promote sustainability within the township,” said Brown and Caldwell Project Manager Colin O’Brien. “Brown and Caldwell is honored to play a key role in transforming the facility and joining DTMA on its journey to becoming a more sustainable, green community.”

The design phase of the project will run through May 2020, with construction scheduled to begin by fall 2020.

Sponsored Recommendations

NFPA 70B a Step-by-Step Guide to Compliance

NFPA 70B: A Step-by-Step Guide to Compliance

How digital twins drive more environmentally conscious medium- and low-voltage equipment design

Medium- and low voltage equipment specifiers can adopt digital twin technology to adopt a circular economy approach for sustainable, low-carbon equipment design.

MV equipment sustainability depends on environmentally conscious design values

Medium- and low voltage equipment manufacturers can prepare for environmental regulations now by using innovative MV switchgear design that eliminates SF6 use.

Social Distancing from your electrical equipment?

Using digital tools and apps for nearby monitoring and control increases safety and reduces arc flash hazards since electrical equipment can be operated from a safer distance....