A.ENV.0135 - Treating abattoir wastewater with Covered Anaerobic Lagoons
Covered Anaerobic Lagoon (CAL) technology enables the capture and use of methane from wastewater as an energy source in an abattoir.
| Project start date: | 19 February 2012 |
| Project end date: | 14 July 2012 |
| Publication date: | 15 January 2024 |
| Project status: | Completed |
| Livestock species: | Grain-fed Cattle, Grass-fed Cattle, Sheep, Goat, Lamb |
| Relevant regions: | National |
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Summary
The aim of this investment was to generate useful, industry-specific data on the rationale behind alternative Covered Anaerobic Lagoon (CAL) technologies and what makes them viable. Appropriate design criteria, cover types, and how to operate and maintain CALs were included in a set of guidelines, as well as current/future challenges and barriers associated with effective use and general application in the red meat industry.
Objectives
To generate useful industrial specific data on the rationale behind alternative Covered Anaerobic Lagoon technologies and what makes them viable.
Key findings
A review of Covered Anaerobic lagoons was undertaken and found that current installations of covered lagoons in Australia are limited. Covered anaerobic lagoons are entirely practical and appropriate for the Australian Red Meat industry.
Benefits to industry
Abattoir wastewater has been treated in a number of different ways in the past however covered anaerobic lagoons have been found to offer a range of benefits including:
• relatively low construction and operating costs.
• ability to improve odour control from wastewater treatment.
• ability to capture and use methane from the wastewater as an energy source in the abattoir.
• ability to generate carbon credits from capturing methane.
MLA action
MLA and AMPC have continued to collaborate in projects in this area including the RRnd4P Waste to Profits project.
Future research
The following aspects might be considered for further review and research. In preparation, it is suggested that the data gathering listed below be undertaken:
• Actual organic loading experience on uncovered and covered anaerobic lagoons based on temperature of wastewater (and effect of ambient temperature)
• Application of pre-treatment for anaerobic lagoons, particularly relating to requirements for anaerobic lagoons if grease removal is not implemented (e.g., scum crust breaking and success under covers)
• Longevity of different type of covers
• Most effective methods of trenching and the recommended approach (perhaps related to soil type) and cost differential between methods
• Gas collection methods (perimeter duct versus simple take off [single or multi point]) and costs and benefits
• Appropriate gas pressure measurement and general and instrumentation
• Gas generation rate and energy output.
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For more information Contact Project Manager: Irene Sobotta |
