Enviromentally friendly with useful by-products...
For organic waste... the answer is "Organics". A patented process for recycling animal manure using specially bred maggots is successful... it took since the market crash of the 30's to perfect.
The Eco-Mag System, developed in Russia, is being marketed by APT Envirotech and CFB in response to growing volumes of animal waste.
It uses maggots to generate three separate products...
Chitin is a "bio-polymer@ which has applications from fibre manure to medicinal sorbents. It is a high-value product fetching up to US$9,000.00 per ton on the international market.