Louisiana Administrative Code › Title 33 - ENVIRONMENTAL QUALITY › Part VII - Solid Waste › Subpart 1 - Solid Waste Regulations › Chapter 30 - Appendices › Section VII-3007 - Processes to Reduce Pathogens - Appendix D.1 and D.2 [Formerly Appendix D.2 existed in section 3009.Appendix E.]

Current through Register Vol. 50, No. 6, June 20, 2024
Appendix D.1
Processes to Significantly Reduce Pathogens
Aerobic Digestion
A process conducted by agitating solid waste with
								air or oxygen to maintain aerobic conditions at residence times ranging from 60
								days at 15oC to 40 days at
								20oC, with a volatile-solids reduction of at least
								38 percent.
Air Drying
A process that allows liquid waste to drain and/or
								dry on under-drained sand beds or on paved or unpaved basins in which the depth
								of the waste is 9 inches. A minimum of three months is needed for this process;
								during two of these months daily temperatures must average above
								0o C.
Anaerobic Digestion
A process conducted in the absence of air during a
								residence time ranging from 60 days at 20oC to 15
								days at 35-55oC, with a volatile-solids reduction of
								at least 38 percent.
Composting
A process conducted by the within-vessel,
								static-aerated-pile, or windrow method whereby the solid waste is maintained at
								minimum operating conditions of 40oC for five days.
								For four hours during this period, the temperature must exceed
								55oC.
Lime Stabilization
A process in which sufficient lime is added to
								produce a pH of 12 after two hours of contact.
Other Methods
Other methods or operating conditions for
								significantly reducing pathogens may be acceptable if pathogens and vector
								attraction of the waste (volatile solids) are reduced to an extent equivalent
								to the reduction achieved by any of the above methods.
Appendix D.2
Processes to Further Reduce Pathogens
Composting
A process conducted by the within-vessel,
								static-aerated-pile, or windrow method. If the within-vessel or
								static-aerated-pile method is used, the solid waste is maintained at operating
								conditions of 55oC or greater for three days. If the
								windrow method is used, the solid waste attains a temperature of
								55oC or greater for at least 15 days during the
								composting period, and the windrow is turned at least five times during this
								high-temperature period.
Heat Drying
A process in which dewatered solid waste cake is
								dried by direct or indirect contact with hot gases and moisture content is
								reduced to 10 percent or less. Solid waste particles reach temperatures well in
								excess of 80o C or the wet-bulb temperature of the
								gas stream, in contact with the solid waste at the point where it leaves the
								dryer, is in excess of 80o C.
Heat Treatment
A process in which liquid waste is heated to
								temperatures of 180o C for 30 minutes.
Thermophilic Aerobic Digestion
A process in which liquid waste is agitated with
								air or oxygen to maintain aerobic conditions at residence times of 10 days at
								55-60o C, with a volatile-solids reduction of at
								least 38 percent.
Other Methods
Other methods or operating conditions for further
								reducing pathogens may be acceptable if pathogens and vector attraction of the
								waste (volatile solids) are reduced to an extent equivalent to the reduction
								achieved by any of the above methods.
Any of the processes listed below, used in
								conjunction with the processes described above, will further reduce pathogens.
								The processes listed below will not, however, reduce the attraction of disease
								vectors if they are not used in conjunction with one of the above processes,
								and therefore are not sufficient alone.
Beta-Ray Irradiation
A process in which solid waste is irradiated with
								beta rays from an accelerator at dosages of at least 1.0 megarad at room
								temperature (ca. 20o C).
Gamma-Ray Irradiation
A process in which solid waste is irradiated with
								gamma rays from certain isotopes, such as 
								60Cobalt and 
								137Cesium, at dosages of at
								least 1.0 megarad at room temperature (ca. 20o
								C).
Pasteurization
A process in which solid waste is maintained for
								at least 30 minutes at a minimum temperature of 70o
								C.
Other Methods
Other methods or operating conditions may be
								acceptable if pathogens are reduced to an extent equivalent to the reduction
								achieved by any of the above add-on methods.
AUTHORITY NOTE:
					 Promulgated in accordance with
					 R.S.
					 30:2001 et
					 seq.