There are three types of municipal biogas:
- Landfill gas: biogas captured in a landfill resulting from the degradation of buried organic material.
- Source separated organic (SSO) anaerobic digestion biogas: biogas produced by anaerobic digesters fed with SSO.
- Sewage sludge gas: biogas produced by anaerobic digesters used to stabilize sewage sludge (biosolids) produced by the waste water treatment plant (WWTP).
The non organics from pre sorted MSW as well as the biosolids from waste water treatment plants can be gasified using the patented wet gasification process without burning. This process lends itself also to forest and beach areas to convert bark, sawdust, timber clean up, construction and drift wood into renewable energy without tar build up, exhaust or smoke issues.
BIOGAS Equity 2 focuses on the conversion of organic food wastes from grocers, cafeterias, restaurants and residences.
Anaerobic digestion of organic municipal food waste is often preferred to composting because of odor issues related to composting.
The organic fraction of the MSW needs to be collected separately or arrived at by the pre processing technology we offer.
Anaerobic digestion of MSW is a challenging proposition because of contaminants (chemical, metal, plastic, etc.) and seasonal fluctuation of quality and quantities fed into the anaerobic digester.
Our engineering partners will install appropriate systems to sort for the contaminants.
Careful study and planning (technical and financial) is paramount to the success of an MSW biogas plant.
BIOGAS Equity 2 will negotiate with a waste transportation company that owns the contract and decide if we own the plant outright or come to an agreement for joint ownership.
Biosolids/ Sewage Sludge
Wastewater treatment http://www.biogas2.com/s (WWTP) produce considerable amount of dewatered sewage sludge that is incinerated with the residue being used as landfill conver.
Anaerobic digestion of biosolids captures the biogas. Moreover, anaerobic digestion stabilizes the sludge (odor) and produces energy to offset WWTP treatment cost. It is a much more sustainable process than incineration often used.
BIOGAS Equity 2 offers study, design, project management, digester start-up, digester optimization, biogas utilization engineering services to WWTP owners and operators. With limited funds available to municipalities, we are prepared to finance and if desired operate the plant on the waste water treatment site.
We have also developed expertise in co-digestion of sludge with other substrates (grease trap, food waste, manure, etc.) to improve digesters biology, biogas production, tipping fee revenues and overall plant efficiency. It’s beneficial to place a municipality’s biogas plant near a wastewater facility and truck other city wastes to it. Land costs are likely less expensive near a wastewater plant.
We believe that in most cases, municipalities prefer to keep the digestates separate and produce fertilizers and soil amendments. It allows the sharing of the CHP and some infrastructure.