City Of Manteca

Waste to Fuel Program

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The City of Manteca is taking steps to minimize costs by creating fuel for its Solid Waste Fleet. 

The City will take specific types of garbage and turn it into Vehicle Fuel which will run the City garbage trucks.  The City has 8 CNG Garbage trucks to date, with the goal of converting the rest to CNG in the next 5 years.  This will meet the California Air Resources Board (CARB) requirements for emissions and save an estimated $500,000 to a million annually in fuel costs.

January 1, 2023 all 2010 and older vehicles must be retrofitted or replaced with alternative fuel or meet current emission standards to be in compliance with regulations set by San Joaquin Valley Air Pollution Control District (SJVAPCD) and CARB.


City of Manteca Wastewater Quality Control Facility (WQCF)  2450 West Yosemite Ave, Manteca, Ca 95337

    The City of Manteca’s goal is to divert recoverable non-cellulosic organic waste produced in the City from landfill disposal towards biologically generated, carbon negative transportation fuel. To attain that goal, the City has completed construction of Phase I of this program and is under construction on Phase II of this program.   The program includes facilities to capture wastewater solids; commercially generated food waste; and fats, oils and grease (FOG) as part of their Waste-to-Fuel Program.

  The captured materials will be cleaned and processed with minimal organic loss for introduction into several continuously stirred anaerobic digesters (AD) at the City of Manteca WQCF.  Biogas generated at the WQCF is currently flared to atmosphere. The AD system will produce a renewable biogas consisting of about 60%-65% CH4, 35% CO2, and small amounts of H2O, H2S, longer chain aliphatics, and Siloxanes.  Many of these components are detrimental to the use of Biogas directly as a vehicle fuel. The new gas treatment processes installed in phase I and II will remove most of the CO2, H2O, H2S,  and Siloxanes to produce SAE J1616 transportation-quality renewable compressed natural gas (R-CNG) with a concentration in excess of 95% methane. The R-CNG will fuel the City’s growing fleet of compressed natural gas vehicles and will be open to the public. The system is designed to produce up to 500 Diesel Gallon Equivalents (DGE)/day (182,500 DGE/year), and is anticipated to initially generate in excess of 140,000 DGE/year. The planned facilities were designed with consideration for future increases in production capacity, potentially doubling in the near future.

  The Biogas produced by the proposed facilities will be utilized to offset current use of diesel and gasoline in City garbage trucks and vehicles. The City has already begun purchasing new CNG vehicles for the garbage fleet as part of the Program. Utilizing the City’s resources in this manner allows for a more economically attractive project with greater environmental benefits than just producing electricity from the biogas.

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2018  - Engineering achievement from California Water Environment Association - North San Joaquin Division (CWEA-NSJ)

2018  - 3rd place for engineering achievement California Water Environment Association (CWEA)

2019  - recipient of the Water Environment Federation (WEF) Project Excellence Award


Saves rate payers about $500k a year.

Helps to meet with future vehicle emission requirements regulations set by SJVAPCD and CARB.

Aligns with recent legislation AB1826 concerning diversion of food waste from landfills

Makes use of biogas emitted from the WQCF.

Reduces CO2, SOx, and NOx emissions to atmosphere.

Key Project Components:

Digester system improvements for biogas production and biosolids treatment.

FOG / Food Receiving Projects - Receiving non municipal waste for co-digestion, concurrent with wastewater.

Fuel - RCNG fuel treatment and dispensing facility under project Compressed Biogas Fueling Facility.

Food Waste Separation Project - Separates Food Waste from Municipal Solid Waste and processes into a slurry,  co-digesting.

RIN/LCSF Credits - D5/D3 pathway modeling, credit brokering and QAP monitoring.


SJVAPCD San Joaquin Valley Air Pollution Control District Grant   $1.893 million

CEC California Energy Commission Grant   $3 million

We are grateful for the support of the SJVACPD & CEC for their support in helping to fund the 2 phases of this program.  We are hopeful of future support from CalRecycle to help fund the last little bit through ORG4 grant funding.

The Basic Process

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Project Manager: Bret Swain, PE, MS, MBA

Main Office Line: 209 456-8400

Sewer:  Drains from homes and businesses to the Water Quality Control Facility (WQCF)

Fats, Oils and Grease (FOG) is a leading cause of sewer backups. FOG occurs when cooking fats are poured down the drain and coat the inside of the pipes, eventually forming a blockage. They accumulate in sewer systems causing clogs and backups. Restaurants have special grease traps to prevent FOG entering the sewer system which must be cleaned periodically.

Waste to Fuel Facility: located at 2450 W Yosemite Ave. Manteca, Ca. 95337

Biogas Treatment: Biogas is produced using well-established technology in a process involving several stages: The actual biogas production takes place through anaerobic digestion in large tanks for about three weeks. In the final stage, the gas is purified (upgraded) by removing impurities and carbon dioxide.

CNG Fuel: Compressed natural gas (CNG) (mostly methane stored at high pressure) is a fuel which can be used in place of gasoline, diesel fuel and propane/LPG. CNG combustion produces fewer undesirable emissions than the aforementioned fuels. In comparison to other fuels, natural gas poses less of a threat in the event of a spill, because it is lighter than air and disperses quickly when released. Biomethane, which is cleaned-up biogas from anaerobic digestion or landfills, can be used.

Collection Trucks: 
A class of Heavy Duty Vehicle used to collect municipal solid waste.  The City of Manteca has other types of HD CNG Vehicles including vacter and vac-con trucks.

Food Waste: Waste food disposed of and found in Municipal garbage. Legislation (AB1826) requires all Cities to divert food waste diversion from landfills


Invitation to August 27, 2019 Ribbon Cutting

2019 August CNG Facility Press Release.pdf

Manteca Biosolids and Biogas Plan - Final.pdf

Solid Waste Master Plan

Presentation - CWEA-NSJ - Sept 18 2019.pdf

Presentation - Green Team San Joaquin - Sept 18 2019.pdf

New Coverage

Television News Video: August 27, 2019 - By Lonnie Wong
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Radio Broadcast Interview:  August 26, 2016 Rich Ibarra
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Article: August 27, 2019 Manteca Bulletin - Valley Green Leader

​Article: July 30, 2019 Manteca Bulletin - It's A Gas!

Article: December 27, 2018 - Turning Waste into Green

Article: December 2016 TPO Magazine - How City Trucks in Manteca, California Could Run On Food Waste

Article:  Move for hunger - Manteca Technology will now combine food waste with residual methane gas to fuel municipal garbage trucks

Radio Broadcast with Article:  February 01, 2016  Capital Public Radio - Manteca Starts Food Waste Recycling Program


Article:   Western Water - groundbreaking

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City of Manteca representatives accepting the Project Achievement Award for Waste to Fuel Program at 2019 WEFTEC conference in Chicago from Thomas Kunetz, WEF President 2018-2019

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In attendance at the August 27, 2019 Waste to Fuel Ribbon Cutting Ceremony


Pictured Left to Right: 

Rich Silverman - Former Councilmember, Gary Probst - Senior Field Representative on behalf of Jerry McNerney United States Congress District 9, Kristina Solberg - Field Representative  On behalf of Dianne Feinstein, United States Senate , Mark Houghton - Director of Public Works,  Jason Laughlin - Field Representative On behalf of Heath Flora, State Assembly, District 12,  David  Breitenbucher - Deputy Mayor,  Jose Nunez - Councilmember, Gary Singh - Councilmember, Ben Cantu - Mayor,
Mike Anderson - Legislative Assistant for Vice-Chair Tom Patti  San Joaquin County Board of Supervisors, District 3, Karen Warner - District Chief of Staff, on behalf of Congressman Josh Harder, US Congress District 10Mallory DeLauro -
District Director On behalf of Eric Swalwell, United States Congress, District 15

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(above) Kristina Solberg - Field Representative presents a Certificate on behalf of Dianne Feinstein, United States Senate


(above) Mallory DeLauro - District Director presents a Certificate on behalf of Eric Swalwell, United States Congress, District 15

Photo of Mark Houghton addressing the crowd at the Ribbon Cutting Ceremony with the Waste to Fuel equipment in the background. 


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(above) Gary Probst - Senior Field Representative  presents a Certificate on behalf of Jerry McNerney United States Congress District 9

DC7A0669 Certificate Presenter.jpg(above) Karen Warner  District Chief of Staff, presents a Certificate on behalf of Congressman Josh Harder, United States Congress District 10

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Mike Anderson - Legislative Assistant presents a Certificate on behalf of Vice-Chair Tom Patti  San Joaquin County Board of Supervisors, District 3

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(above) Jason Laughlin - Field Representative  presents a Certificate on behalf of Heath Flora, State Assembly, District 12

All Certificates presented to Mayor Ben Cantu