Biogas-To-RNG Project Developer Is Ready To Move The Needle

BioCycle interviewed Bob Powell, founder and CEO of Brightmark, about his company’s growth trajectory in the anaerobic digestion and RNG space.
Nora Goldstein

Connections: What’s Cooking?
Sally Brown

Finding the ingredients to make a potting mix that plants will love from Class A digested biosolids entails trying a range of recipes, sniff tests and parameter measuring.
Sally Brown

Connections: Hail To The Trees … And The Biosolids

Drawdown series continues with carbon sequestration related to trees and the benefits of adding recycled organics. Part IV
Sally Brown

Maryland Nutrient Trading Update
The final rule bars direct trades between wastewater treatment plants (WWTP) as a means to avoid new pollution “hotspots” and requires a tighter WWTP “performance baseline” for trades of credits from WWTPs to other sources.

Recent developments in the state of Maryland show that progress can be a work in progress.
Michael H. Levin
BioCycle March/April 2019

Are California Markets Ready For Influx Of Recycled Organics?
Are California Markets Ready For Influx Of Recycled Organics?

A full-day Workshop at BioCycle West Coast18 explored that question. Outcomes and next steps are captured in a final report.
Ron Alexander and Nora Goldstein
BioCycle August 2018

Malt Producer Closes Loop With Digestate
A 3-tank pasteurization system with tube-in-tube heat exchangers facilitates final treatment of the digestate, used as a biofertilizer.

Sixty percent of Muntons’ supply chain carbon footprint is attributed to artificial fertilizer used by its barley growers. The solution? Convert its liquid malt waste into biofertilizer.
Richard Crowhurst
BioCycle June 2018

Nutrient Credits Start To Surge
Chesapeake Bay Nutrient Credits

Nutrient credit initiatives are proceeding with relative speed in several states. This could be good news for anaerobic digestion projects.
Michael H. Levin
BioCycle May 2018

Recovering Nutrients In Digested Dairy Manure
Figure 1. Treatment phases (top row) and nutrient content changes in effluent stream (bottom row) at Edaleen Dairy

Further separation concentrates nitrogen and phosphorus in the solids. The liquid “tea water” contains mainly dissolved solids, including ammonia and potassium.
Peter Gorrie
BioCycle March/April 2018

Poultry Litter Digestion And Digestate Analyses
Oril-Leader poultry farm AD system is the largest in Ukraine.

Data indicates codigestion with other substrates can improve biogas yield and quality. And most of the organic N is converted to ammonia, which can be converted to ammonium and nitrate by soil microbes. Part II
Craig Coker
BioCycle October 2017

Poultry Litter Digestion
Poultry litter contains valuable major and minor plant nutrients, and a significant amount of energy.

Poultry litter — a heterogeneous and fairly dry mix that includes manure and bedding — can be diluted to improve its digestibility. Part I
Craig Coker
BioCycle September 2017

Liquid Manure And Digestate Composting
Figure 2. Turning and aeration screws along the bottom of the traveling bridge

Researchers in Italy examined fate of nitrogenous compounds during composting to meet EU nitrate limit of 152 lbs/acre.
Alessandro Chiumenti and Craig Coker
BioCycle July 2017

Selling Your Sustainability Story
Magic Dirt™

What looks like peat, acts like peat but isn’t peat? That’s the sustainability story behind Magic Dirt™, made from anaerobically digested dairy manure fibers.
BioCycle March/April 2017

Nutrient Credit Procurement Update
State legislation could create opportunities for advanced BMPs like anaerobic digestion to predictably sell forward large volumes of “long-term verified nutrient credits.”

State proposals to procure nutrient reductions like commodities may offer anaerobic digestion projects new revenue streams.
Michael H. Levin
BioCycle February 2017

New Technologies Capture Phosphorus And Ammonia
Separated solids with high P levels (1). Samples (2) after each stage of the P recovery process (from left to right): slurry; solids after dewatering; liquids after dewatering; and final low P liquid product.

Companies, often in tandem with universities, are developing phosphorus and ammonia recovery systems that can be paired with anaerobic digesters.
Dan Emerson
BioCycle September 2015

Ontario Composter Expands With Digestate Processing
Digestate is mixed with carbon sources using an Ecoverse DW 3080 stationary shredder/blender in the enclosed receiving hall at the composting facility.

All Treat Farms composts digestate from the anaerobic digester servicing the City of Toronto’s residential organics collection program.
Peter Gorrie
BioCycle August 2015