Dan told the BBC the monitoring and caring for a severely disabled child meant neither he or his partner got much sleep, were exhausted and also had two other children to care for.
The rest of the material produces digestate which can be used as fertiliser by nearby farms.
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Under US President Donald Trump it is expected to be "full speed ahead" for regulatory approval, says Scott Wagner, head of the antitrust practice at the law firm Bilzin Sumberg.