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Iowa Energy Office - Biomass Innovation Brochure_W&RRC Copyrighted November 5, 2018 City of Dubuque Consent Items # 9. ITEM TITLE: lowa Energy Office - Biomass Innovation SUMMARY: City Manager transmitting an excerpt from the lowa Energy Office's Energy Plan recognizing the City of Dubuque's Biomass Innovation at the Water& Resource Recover Center. SUGGESTED DISPOSITION: Suggested Disposition: Receive and File ATTACHMENTS: Description Type Biomass Innovation-City of Dubuque Supporting Documentation _ ��.; 4�` j . :.� � 'fi'-•+,. L;'�:_, ".J' � � I ' ._' .. " ._ _. .. . " � . .'� y.� � �' ' . � . � .� Jr`��� �I i Y :� a�Pf I I .... . . . . _. .. .. .. a .i � ..�....� � `r � . .. . . . . _. ". e. ..' ,: ; ` _., ,kT..'. ._ _ 9! '_.._.._.__ �I Biomass Innovation - City of Dubuque � Following a plant upgrade in 2013,Dubuque's Water&Resource Recovery Center(WRRC) I began to capture biogas from anaerobic digestion tanks that were introduced to treat ) wastewater and serve as a renewable energy resource.The anaerobic digestion process � produces methane gas that is captured,cleaned and burned to power turbines that generate � 'I _ _ electricity.The CHP system features three 200kW microturbines that generate 80 percent of � the plant's electricity needs.Thermal energy produced through this process is used to heat the � • ; complex.An additional by-product is 15.5 tons of fertilizer output per day from the digesters, —� eliminatingthe previous need to incinerate residual biosolids. ��"' `L �--� �� ._ .�-. '...� _ The WRRC,which processes an average of seven million gallons of wastewater per day,has --- �� � achieved a cost savings of over$624,000 annually through the reduction of grid-purchased ,� electricity,eliminating fuel oil costs related to the incineration process and increasing the ' 't � efficiency of its operating staff.In addition,revenues over$215,000 can be generated through - the high-strength waste program. �T T�T T^j T� U U��U The ability to process high-strength waste at WRRC provides an advantage to several local businesses,including a food processor that eliminated a daily 90-mile haul of waste and reduced ,ER & RF SOURC its cost per gallon for wastewater disposal by 60 percent.Dubuque is the headquarters of Unison,the manufacturer of biogas conditioning units installed at the site and the project RECU VERY provided the opportunity for this supplier to showcase equipment locally. In August 2016,Dubuque entered into a partnership with BioResources Development and Black �T��R � Hills Energy to generate approximately 200 Mcf/day of pipeline quality RNG at the WRCC site, CEJ.�! 1� j " a portion of which will be injected into the natural gas pipeline distribution system.This product _�_,__---- -- `� *S qualifies for gas revenues and RIN(Renewable Inventory Number)payments due to its use as an _ --- -� advanced biofuel.The city will receive lease payments and a portion of gross revenues from the sale of gas and RI Ns.With the city converting some fleet vehicles to natural gas fuel,there will also be the potential to power city vehicles with RNG produced at the facility.When the pipeline was tapped in late 2017,the project became one of the first biogas sites in the state with a direct � feed to the gas pipeline. f .�: ., -s.. . � -: �J;�J r � - �i : :t � "� ' ,wF�r�� ��. -`... 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