Rinse or soak in cold water (if soaking, make sure you change the water each day) to help avoid staining, and then wash along with your regular laundry. No need for a separate load!
When washing and drying, avoid high temperatures and the use of softeners, whiteners or any other unnecessary additives.
If using high heat, please be aware that it may wear the pads out faster, and may also make them a bit puffier, by shrinking the core batting slightly. Please visit this page from the wonderful EcoNuts, for great tips on natural disinfectants: http://econutssoap.com/how-to-disinfect-laundry/