CH4 Biogas: Napoleon Biogas Case Study April 4, 2017 Odor Management Workshop

Transcription

1 CH4 Biogas: Napoleon Biogas Case Study April 4, 2017 Odor Management Workshop

2 Facility Case Study CH4 Biogas Introduction Napoleon Biogas Plant Overview Odor Issue Summary Control Systems Monitoring Lessons Learned

3 CH4 Biogas Overview Who we are: Formed in 2009, by a group of engineers, industry experts, & entrepreneurs with a passion for the environment & the perseverance to drive change. Centered on proven technology for large co-digestion facilities utilized in over 45 plants worldwide since An independent study by Cornell University concluded that our Synergy Biogas facility was the most efficient system in NYS. Leaders in the space, representing the biogas industry overall, and well connected and active in policy and legislation. sustainable. clean. power.

4 Napoleon Biogas: Overview Broke ground in 2012 and starting taking waste in 2013 Designed to handle 400 wet tons of waste per day and produce biogas for up to 2.8 MW/h of electrical power Complete mix system with de-packaging capabilities

5 Napoleon Biogas: Process Schematic Example Feedstock Recycled Goods Pomace Gas Prep CHP 1 CHP 2 Energy DAF Sludge Vegetable Screenings Regional Livestock Manure Receiving/ Mixing Tank Pasteurization Anaerobic Digester Storage Tank Solids Separation Biosolids Can Goods Biofilter Regional Food Waste WWTP Discharge

6 Odor Issue Summary The facility received 55 total odor complaints. 60% were from 3 people Started in April complaints received when the plant wasn t receiving and processing waste Two independent consultants reviewed and negated validity of the odor complaints on a basis of wind direction, distance to the facility, and description of odor, and due to overall design and technology

7 Odor Control: Systems Receiving tanks 1. High solids are received in a covered, completely mixed inground receiving tank with a 10 by 10 mechanically lifted hatch that is normally closed unless a truck is unloading. 2. To control potential odors from this step, the odorous air is withdrawn and sent to the two stage air treatment system. 3. There is a continuous withdrawal of approximately 530 cubic feet per minute, maintaining a negative pressure, to the prefilter representing a tank volume air exchange of about 13 minutes

8 Odor Control: Systems Main Building 1. Packaged wastes are received inside the main building, which has a continuous withdrawal of 1,760 cfm of odorous air to the odor control system (biofilter). 2. Delivered packages are processed inside the building by a crusher and screening unit. The organics are directed to the receiving tanks and the recycled material are kept in covered storage containers. Pasteurization, tanks, and piping 1. Pasteurization tanks, digester and digestate storage tank are sealed vessels. Biogas generated by the digester and released in the storage tank is directed in a sealed pipeline to CHP units. Excess biogas is directed in sealed pipelines to an onsite flare for combustion.

9 Odor Control: Biofilter Biofilter 1. Odorous air from the depackaging area, the centrifuge area and the receiving tanks is directed to a pre-filter. Building air and discharge from the pre-filter is directed to a biofilter that uses fixed film biology to absorb and degrade odorous air constituents on a continuous basis. 2. The biofilter is an in-ground concrete tank that contains pumice rock for microorganisms to grow on. 3. Blowers automatically maintain negative pressure in the building and receiving tanks. 4. Treated air is discharged to atmosphere via a 15-foot high stack. 5. Operators do a daily smell test and H2S test at the stack to verify system performance.

10 Odor Monitoring 1. Surveillance readings Daily protocol for odor collection at the facility perimeter using a Jerome meter Daily localized H2S monitoring at various points (tanks, biofilter, etc.) 2. Recording daily weather including wind speed and direction 3. Odor Complaint Handling Odor complaint registration - in person, over the phone, or on the company website Complaint response documentation and testing Take corrective actions as necessary Document and communicate findings and results

11 Odor Management: Lessons Learned Put in place best-in-class technology and processes then use it! Engage with the community early and often! Before, during, and after construction, and through on-going operations engage with the community and key stakeholders Continue outreach and ease of accessibility for questions or concerns

12 CH4 Biogas: Napoleon Biogas Case Study April 4, 2017 Odor Management Workshop thank you!