Anaerobic Biodigester Project

Transforming Food Waste into Clean Energy & Fertilizer for New Canaan

Chomp anaerobic biodigester containerized system - modular food waste processing unit

Chomp's containerized biodigester system - delivered ready for installation

500-1,000
Tons/Year Capacity
95%
GHG Reduction
$268K
Annual Savings Potential
30%
Federal Tax Credit (through 2032)

Federal Funding Available Through 2032

The Inflation Reduction Act (IRA) provides substantial tax credits for biodigester projects, reducing upfront costs by 30-50%.

30% Base Credit (IRA Section 48)+10% Domestic Content Bonus+10% Energy Community Bonus

How Anaerobic Digestion Works

Detailed anaerobic digestion process diagram showing biomass inputs (livestock excrement, sewage sludge, food waste, agricultural products), fermenter tank with biogas production, methanogen bacteria converting nutrients to biogas for energy use, and fermentation residue compost output

Complete biogas production process: from diverse biomass inputs through anaerobic fermentation to renewable energy and organic fertilizer outputs

1

Collection

Food waste collected from schools, restaurants, and institutions

2

Digestion

Bacteria break down waste in oxygen-free tanks at 95-100°F for 3-4 weeks

3

Energy Production

Biogas captured and converted to electricity or renewable natural gas

4

Fertilizer Output

Nutrient-rich digestate used as organic fertilizer for farms and parks

Environmental Impact

95%+ GHG Reduction

Prevents methane emissions from landfills while generating renewable energy, achieving the highest emissions reduction of any food waste solution.

4,560 tons CO₂e/year

Equivalent to removing 990 cars from the road

Renewable Energy Generation

Biogas can power municipal buildings, be sold to the grid, or converted to renewable natural gas (RNG) for vehicles.

~500 MWh/year

Enough to power 45 homes annually

Organic Fertilizer Production

Digestate is a nutrient-rich organic fertilizer that can be used on town parks, athletic fields, or sold to local farms.

~800 tons/year

High-quality organic soil amendment

Cost Analysis

Capital Investment

Equipment & Installation$550K - $1.1M
30% Federal Tax Credit (IRA)-$165K - $330K
Potential Bonuses (Domestic Content + Energy Community)-$110K - $220K
Net Cost After Credits$275K - $550K

Annual Operating Economics

Tipping Fee Savings (1,924 tons @ $112/ton)+$215K
Energy Revenue (RNG or electricity)+$30K - $50K
Operating Costs (labor, maintenance, utilities)-$80K - $120K
Net Annual Benefit$125K - $185K

Payback Period: 2-4 Years

With federal tax credits, the system pays for itself in 2-4 years through tipping fee savings and energy revenue. Over 20 years, net savings could exceed $2.5 million.

Implementation Timeline

Phase 1: Planning & Design

6-9 months
  • Feasibility study & site selection
  • Engineering design & permitting
  • Secure federal tax credits
  • Community engagement

Phase 2: Construction

12-18 months
  • Site preparation & foundation
  • Equipment installation
  • Electrical & gas connections
  • Testing & commissioning

Phase 3: Operations

Ongoing
  • Staff training & hiring
  • Waste collection logistics
  • Energy offtake agreements
  • Monitoring & optimization

Total Timeline: 2-3 Years

From initial planning to full operations. Starting now positions New Canaan to meet the January 2026 CT compliance deadline and maximize federal tax credit benefits before they phase out.

Proven Success Stories

UC Davis biodigester installation showing interior processing equipment and biogas capture system

UC Davis - Chomp Biodigester

UC Davis installed a Chomp biodigester in 2021 to process campus food waste. The system handles 20-30 tons per week, generates renewable natural gas for campus vehicles, and produces organic fertilizer for the campus farm.

Processes 1,000+ tons/year of campus food waste
Powers campus shuttle buses with renewable natural gas
Reduces campus GHG emissions by 95%
Massachusetts biodigester facility showing commercial-scale anaerobic digestion infrastructure

Massachusetts Biodigester Network

Massachusetts built extensive biodigester infrastructure to support their 2014 food waste ban. The state achieved 7% total waste reduction - the only state to meet its goals among early adopters.

15+ commercial biodigesters statewide
Processes 500,000+ tons/year of organic waste
Blueprint for Connecticut's expansion

Ready to Transform New Canaan's Food Waste?

Join Planet New Canaan in building a sustainable future with renewable energy and zero food waste.

Images courtesy of Chomp Inc.