Upload
others
View
7
Download
0
Embed Size (px)
Citation preview
www.eisenmann.us.com© Eisenmann 2014
Anaerobic Digestion of High Solids Organic Material
Solid Waste & Recycling ConferenceMay 2014
John McDowell, Sales Engineer – Biogas Solutions
www.eisenmann.us.com© Eisenmann 2014
www.eisenmann.us.com© Eisenmann 2014
Introduction
Extracting Value of Organic Waste using Anaerobic Digestion
High Solids Digestion
Project Profile
Agenda
www.eisenmann.us.com© Eisenmann 2014
Eisenmann USA
Over 37 Years in the US
Located in Crystal Lake, Greater Chicago Area
Sales, Engineering, Design and Services
Over 1000 industrial installations in the US
Over 90 biogas installations worldwide
~ 80 employees (3700 globally)
www.eisenmann.us.com© Eisenmann 2014
Extracting Value from Organic Waste
with Anaerobic Digestion
www.eisenmann.us.com© Eisenmann 2014
Current State of National Organics Recovery
Source: EPA
www.eisenmann.us.com© Eisenmann 2014
Waste Audits
Conducting a waste audit or evaluation
Sources: MIT and Tim Horton
www.eisenmann.us.com© Eisenmann 2014
Anaerobic Digestion Process
Liquids and solidsmay be separated.
Full Graphic: http://americanbiogascouncil.org/pdf/adOverview.pdf
www.eisenmann.us.com© Eisenmann 2014
Solids Content and Handling of Feedstock
Low Solids High Solids
What kind of digester do I need? Typical Approach: High solids or Low solids?
www.eisenmann.us.com© Eisenmann 2014
Solids Content and Handling of Feedstock
What kind of digester do I need? How can I handle the feedstock - pumping or stacking?
Low Solids High Solids
Pumpable Stackable
www.eisenmann.us.com© Eisenmann 2014
High Solids Digestion
www.eisenmann.us.com© Eisenmann 2014
Mixed Horizontal Plug Flow Schematic
Biowaste AD System 3D-Model
SubstrateConditioning
Substrate Feed
Solids Separation
Main Digester
Pump Room
BiogasConsumer
Post Digester
www.eisenmann.us.com© Eisenmann 2014
Substrate Conditioning - Grinding
Quick grinding of larger size, inhomogeneous substrates
Suited for yard and landscape waste
www.eisenmann.us.com© Eisenmann 2014
Star screen
Substrate Conditioning - Screening
Loosening, sieving, transport, removal of oversize contaminants
Suited for green bin, yard, and landscape waste
www.eisenmann.us.com© Eisenmann 2014
Substrate Conditioning - Hammermill
Substrate is macerated and homogenized with hammermillOrganic material is macerated; packaging and contaminants are separated
Suited for packaged pre- and post-consumer food waste and slaughterhouse waste
www.eisenmann.us.com© Eisenmann 2014
Substrate Feed System - Solids
Provides buffer storage of conditioned, high solids organic waste
Suited for stackable and bulk materials
www.eisenmann.us.com© Eisenmann 2014
Substrate Feed System - Liquid
Receiving pit and/or tanks for liquid organic materialsReceives and provides buffer storage
Suited for all pumpable organic material
www.eisenmann.us.com© Eisenmann 2014Biowaste AD System 3D-Model
Maximizing Biogas Production
www.eisenmann.us.com© Eisenmann 2014
Digestate Handling
Hose pumps used to remove and convey digestate from main digester vessel
Suction pump with less wear parts and easy maintenance
Suited for digestate with lumpiness and high viscosity
www.eisenmann.us.com© Eisenmann 2014
Solids Separation
Screw press separators remove non-digestible solids
Press cake – 30-35% total solids Press water – 8-20% total solids
www.eisenmann.us.com© Eisenmann 2014
Post digester
Covered vessel for residual gas production
Size varies depending on storage requirementsSubmersible mixersDouble membrane gas storage
www.eisenmann.us.com© Eisenmann 2014
Output – Biogas
Combined Heat and Power Unit (CHP)
Electricity: on-site or fed into utility or micro grid Thermal energy: heat digestion process or
industrial processes
Biogas Upgrading Unit
Fed into utility pipeline system (RNG) Utilization as vehicle fuel (CNG or LNG)
www.eisenmann.us.com© Eisenmann 2014
Output – Digestate
The nutrient-rich solid and liquid digestate can be a valuable co-product.
www.eisenmann.us.com© Eisenmann 2014
Considerations
Feedstock Solids content and handling Quantity / Feedstock agreements
Output Use of biogas and digestate
@wallstreetdaily.com
@wue.coop
www.eisenmann.us.com© Eisenmann 2014
CR&R Biogas Case Study
- Organic Waste to Vehicle Fuel
www.eisenmann.us.com© Eisenmann 2014
Extracting Value from Organic Waste
Landfill with GasCollection Composting Anaerobic
Digestion
EmissionsReduction
Energy Generation
Nutrient Recovery
Cost of Disposal Lower Middle Higher
www.eisenmann.us.com© Eisenmann 2014
CR&R Anaerobic Digestion Project
Feedstocks
High Solid Yardand Food Waste
Throughput
229 Tons per Day~ 80,000 Tons per Year
(Over 300,000 Tons per Year in 2020)
Biogas / CNG Production
~ 1,000,000Diesel Gallon Equivalent (DGE)
per Year
CR&R Environmental Services
~50 Municipal Contracts
> 2.5 Million Customers
Perris, California – Phase 1
www.eisenmann.us.com© Eisenmann 2014
CR&R Project Benefits
“After a worldwide search, Eisenmann’sanaerobic digestion system stood out
as the only technology that was able toprovide the highest possible conversion rates
for the broadest range of feedstocks.”
Mike Silva, CR&ROrganics Processing Project Leader
Diverting green waste to biogas plant reduces emissions of green house gases CNG to fuel fleet of collection vehicles Digestate will be used as soil amendment or composting
www.eisenmann.us.com© Eisenmann 2014
Contact
John McDowell
Sales Engineer – Biogas Division
Phone: (815) 382 - 1152E-Mail: [email protected] East Dartmoor Dr.Crystal Lake, IL 60014
www.eisenmann.us.com
www.eisenmann.us.com© Eisenmann 2014
Additional Slides and Information
www.eisenmann.us.com© Eisenmann 2014
Municipal Biogas Plant
Built: 2010Location: SwitzerlandSubstrate: manure, post consumer foodwaste
from green bin collection, yard waste,food manufacturing waste
Capacity: 12,000 t/yrDigester size: 212,000 gallonsBiogas flow: 88 CFMInstalled electrical capacity: 330 kW
Main and post digester Biogas piping
www.eisenmann.us.com© Eisenmann 2014
Biogas Plant with Pushfloor Delivery
Built: 2012Location: SwedenSubstrate: post consumer foodwaste from
green bin collection, yardwaste
Capacity: 20,000 t/yrDigester size: 2 x 212,000 gallonsBiogas flow: 153 CFMBiogas upgraded to CNG, used to fuel publictransportation vehicles
3D Rendering Double concrete main digester with pushfloor substrate delivery system
www.eisenmann.us.com© Eisenmann 2014
Anaerobic Digestion Process – Overview
Food Waste
Green Waste
Receiving Area Pulper/GrinderScreening
System
Main DigesterBiogas
Separator
Liquid Effluent
Press Cake
Post Digester /
StorageLiquid Fertilizer
Composting
Walking Floor
Container
Biogas Upgrading
Substrate Receiving
Substrate Dosing
Biogas
Digestate
Substrate Preparation
www.americanbiogascouncil.org
Promoting the Anaerobic Digestion and Biogas Industries
www.americanbiogascouncil.org
Promoting the Use of Biogas
O 208 Members from the U.S., Germany, Italy, Canada and the UK
O All Industry Sectors Represented
Key Industry Goals:
O Promote biogas markets, technologies and infrastructure
O Achieve policy parity
O Promote as a best practice for environmental stewardship andgreenhouse gas reduction
www.americanbiogascouncil.org
Promoting the Anaerobic Digestion and Biogas Industries
Changing the Biogas Industry through:o Legislative and Regulatory Affairs:
o Federal:
o Favorable language in Farm Bill
o Introduction of Biogas Investment Tax Credit(Rep. Kind and Rep Lewis)
o States: 8 separate organics recycling legislations
o Sharing Expertise:
o Specialized Working Groups
o Marketing and Education:
o Briefings, presentations, and webinars for customers, policy makers, and the general public
o Member Exposure
o Speaking opportunities in ABC workshops, webinars
o Large Industry Network – 6,000+ member company contacts
o Entire supply chain of production, processing and useJoin Today!
Contact Josh Lieberman at [email protected] or 202-640-6595 x 322
www.americanbiogascouncil.org
Promoting the Anaerobic Digestion and Biogas Industries
35
Some of our members:
Dedicated to maximizing the production and use of biogasfrom organic waste
35