Have you considered ...

Have you considered eliminating all of your waste. Using  a modern day biodigester with RNA microbial groups will breakdown 100% of the organic matter into their elemental form.  You are left with potable water and some minerals for any use. Suggest add to cow feed. Their immune system will thank you.  No chemicals at all. 100% natural microbes. Depending on the density of waste and volume anywhere from 3 cents per 1,000 gallons to thick mass of 1 cent per 100 gallons.  Using nature to do what she is already doing is always less expensive. We just need to put it where it can do the most good.