Code of Maine Rules
01 - DEPARTMENT OF AGRICULTURE, CONSERVATION AND FORESTRY
001 - AGRICULTURE - GENERAL
Chapter 211 - RULES FOR THE DISPOSAL OF ANIMAL CARCASSES
Appendix 001-211-B
Current through 2024-38, September 18, 2024
BEST PRACTICAL TREATMENT
FOR ANIMAL CARCASS INCINERATORS
The following language was taken from a model DEP license for a veterinary incinerator used to dispose of animal carcasses:
1. Best Practical Treatment ("BPT") for existing equipment means that method which controls or reduces emissions to the lowest possible level considering:
- the existing state of technology;
- the effectiveness of available alternatives for reducing emissions from the source being considered; and
- the economic feasibility for the type of establishment involved.
This source was previously subject to Best Available Control Technology (BACT) requirements. The former BACT determination is now considered Best Practical Treatment for this source. BPT for the Class IV-A veterinary incinerator includes the following:
Operating temperature in the secondary chamber or refractory lined stack shall be maintained at or above 1600°F with a stack gas retention time, at or above 1600°F, of at least 0.5 second.
To ensure an efficient burn and to prevent odors and visible emissions, the secondary chamber shall be preheated, as specified by the manufacturer, until the pyrometer temperature measures a minimum of 1200°F prior to commencing the burn cycle (check with the manufacturer to see that this will still ensure compliance, there is usually test data available or a VE can be done at the source; if not then leave at 1600).
Once the burn cycle has commenced by introduction of primary chamber combustion, the incinerator shall be operated in an efficient manner and as specified by the manufacturer for the period of time between preheat and reaching the set operational temperature to be a minimum of 1600°F in the secondary chamber.
The temperature in the secondary chamber or refractory lined stack shall be maintained at or above 1600°F for the duration of the burn cycle.
A pyrometer and 1/4 inch test port shall be installed and maintained at the location of the incinerator or refractory lined stack, which provides sufficient volume to insure a flue gas retention time of not less than 0.5 seconds at the minimum of 1600°F.
A log will be maintained recording the weight of the waste charged, preheat time, charging time and the temperature of the secondary chamber every 60 minutes after start-up until, and including, final shutdown time. For facilities operating a chart recorder, the start time, date, and weight charged may be logged on the chart.
A maximum particulate emission rate of 0.20 gr/dscf corrected to 12% CO2 will be met. Emissions information is based on a licensed allowed particulate matter emission limit of 0.20 gr/dscf corrected to 12% CO2, the burning of propanefuel as an auxiliary fuel, and the use of AP-42 factors: Tables 2.3-1 and 2.3-2 for biomedical waste incineration (dated 7/93) and Table 1.5-1 for liquid propane fuel (dated 07/08):
PM - 0.20 gr/dscf corrected to 12% CO2, based on BACT, and 0.20lb/103 gallons fuel factor.
SO2 - 0.16 lb/hr based on the AP-42 factors of 2.17 lb/ton and 0.00 lb/103 gallons fuel factor.
NOX - 0.47 lb/hr based on the AP-42 factors of 3.56 lb/ton and0.207 lb/103 gallons fuel factor.
CO - 0.34lb/hr based on the AP-42 factor of 2.95 lb/ton and 7.50 lb/103 gallons fuel factor.
VOC - 0.04 lb/hr based on the AP-42 factor of 0.299 lb/ton and 1.0 lb/103 gallons fuel factor.
Visible emissions from the incinerator shall not exceed 10% opacity based on a six (6) minute block average basis.
The ash must be disposed of in accordance with the requirements of the Bureau of Remediation and Waste Management.
The incinerator operator(s) shall receive adequate training to operate the incinerator in accordance with the manufacturer's specifications and shall be familiar with the terms of the Air Emission License.
2. BPT for new sources and modifications requires a demonstration that emissions are receiving Best Available Technology (BACT) as defined in 06-096 CMR 100. BACT is a top down approach to selecting air emission controls considering economic, environmental and energy impacts. BACT for the Class IV-A (veterinary) incinerator includes the following:
Operating temperature in the secondary chamber or refractory lined stack shall be maintained at or above 1600°F with a stack gas retention time, at or above 1600°F, of at least 1.0 second.
To ensure an efficient burn, and to prevent odors and visible emissions, the secondary chamber shall be preheated, as specified by the manufacturer, until the pyrometer measures a minimum of 1200°F prior to commencing the burn cycle (check with the manufacturer to see that this will still ensure compliance, there is usually test data available or a VE can be done at the source; if not then leave at 1600).
Once the burn cycle has commenced by introduction of primary chamber combustion, the incinerator shall be operated in an efficient manner, and as specified by the manufacturer, for the period of time between preheat and reaching the set operational temperature to be a minimum of 1600°F in the secondary chamber.
The temperature in the secondary chamber or refractory lined stack shall be maintained at or above 1600°F for the duration of the burn cycle.
A pyrometer and 1/4 inch test port shall be installed and maintained at the location of the incinerator or refractory lined stack, which provides sufficient volume to insure a flue gas retention time of not less than 1.0 second at a minimum of 1600°F.
A log will be maintained recording the weight of the waste charged, preheat time, charging time and the temperature of the secondary chamber every 60 minutes after start-up until, and including, final shutdown time. For facilities operating a chart recorder, the start time, date, and weight of waste charged may be logged on the chart.
A maximum particulate emission rate of 0.20 gr/dscf corrected to 12% CO2 will be met. Emissions information is based on a licensed allowed particulate matter emission limit of 0.20 gr/dscf corrected to 12% CO2, the burning of propanefuel as an auxiliary fuel, and the use of AP-42 factors: Tables 2.3-1 and 2.3-2 for biomedical waste incineration (dated 7/93) and Table 1.5-1 for liquid propane fuel (dated 07/08):
PM - 0.20 gr/dscf corrected to 12% CO2, based on BACT, and 0.20lb/103 gallons fuel factor.
SO2 - 0.16 lb/hr based on the AP-42 factors of 2.17 lb/ton and 0.00 lb/103 gallons fuel factor.
NOX - 0.47 lb/hr based on the AP-42 factors of 3.56 lb/ton and0.207 lb/103 gallons fuel factor.
CO - 0.34lb/hr based on the AP-42 factor of 2.95 lb/ton and 7.50 lb/103 gallons fuel factor.
VOC - 0.04 lb/hr based on the AP-42 factor of 0.299 lb/ton and 1.0 lb/103 gallons fuel factor.
Visible emissions from the incinerator shall not exceed 10% opacity based on a six (6) minute block average basis.
The ash will be disposed of in accordance with the requirements of the Bureau of Remediation and Waste Management.
The incinerator operator(s) shall receive adequate training to operate the incinerator in accordance with the manufacturer's specifications and shall be familiar with the terms of the Air Emission License.
