Brown and Caldwell – RNG Development

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Brown and Caldwell – RNG Development

About the Company:

Brown and Caldwell is an environmental engineering consulting firm, serving clients locally and globally from 52 locations. They are the largest engineering and construction firm solely focused on the U.S. water and environmental sectors.

They have worked with municipal, federal, and private organizations to overcome environmental challenges with their designs and solutions. Brown and Caldwell offer a comprehensive range of engineering, scientific, consulting and construction services necessary for a successful project.

Brown and Caldwell were founded on the principles of service, great technical solutions, and innovation, and these qualities are just as important to them today they were on day one.

About the Solution:

Brown and Caldwell focuses on efficient cost effective design and construction to deliver renewable natural gas (RNG) facilities that maximize uptime and minimize long-term maintenance. RNG is a carbon neutral, versatile fuel that is fully compatible with existing pipelines and infrastructure. It is generated by anaerobically turning biogas from animal waste, food waste, wastewater sludge, and trash into biomethane and used to power agricultural, industrial, and commercial businesses, homes, and vehicles. Brown and Caldwell has been helping clients capitalize the monetization of RNG for nearly 40 years.

Their services include biogas conditioning and upgrading to pipeline quality biomethane and the gas monetization, operation, design, construction, and permitting of RNG facilities. This diverse experience has enabled them to deliver custom designs for nine projects over the last six years that incorporate stakeholders interests into the facility and maximize carbon intensity scores and overall profitability.

Brown and Caldwell 201 N Civic Dr, Walnut Creek, California USA 800-727-2224 Visit Company Website

Solution Type

  • AD Support


  • Project Developer


  • Energy


  • GHG
  • Odor
  • Pathogens

To view additional information about this vendor, click below.

Solution Strengths, Weaknesses and Critical Indicators

Anaerobic Digester Associated Technology:

NOTE: There are several technology types that are used as part of an integrated manure management system that includes an anaerobic digester and are not applicable to manure management in other cases. The impact of these technologies on the critical indicators are represented as those of an entire anaerobic digester system.


  • Long usable life and can be run reliably
  • Creates energy and generates environmental credits
  • Requires proper preparation of the feedstock
  • Requires other technologies for energy utilization
  • Requires other technologies for digestate handling
  • Proper feeding & system monitoring is required to avoid system downtime
  • Proven technology for odor control, GHG reduction and pathogen reduction

Newtrient Comments/Opinions:

Brown and Caldwell has recently been added to the Newtrient catalog. Newtrient will continue to work with Brown and Caldwell to further refine the cost and performance information on their solutions. Newtrient will update this entry as more information becomes available and as new commercial dairy installations come online.

Newtrient 9-Point Scoring Rating

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