Green Steel Environmental provides products for anaerobic digester operators to clean their wastewater and renewable natural gas in an economical and environmentally positive way. We upcycle an industrial by-product, use it to sequester important nutrients from renewable natural gas and wastewater, and reuse those nutrients as fertilizer. Our products replace the current state of the art which includes hazardous chemicals and expensive, non-renewable materials.

Our first product is an additive for anaerobic digesters that sequesters phosphorus and sulfur in the digester. Our phosphorus removing capabilities replace hazardous chemicals like ferric chloride and aluminum sulfate (alum). We can also replace or work alongside biological phosphorus removal processes. There are typically no capital expenditures required by a digester operator to use our products as we can deliver our products in a granulated form or in a powder that can be added as a slurry. Our product settles into a plant’s biosolids and can be included in either land applications as fertilizer or in any standard landfill. Customers should expect significant reductions in phosphorus and struvite.

A second benefit of our product is in sulfur removal. We can remove up to 80% of the sulfur that is generated inside an anaerobic digester before that sulfur becomes hydrogen sulfide. This dramatically reduces the load and expense of any biogas scrubbing infrastructure.