Biogas

A financial model of a thermo-chemical biomass to ethanol plant has been developed for LanzaTech.  In a base case modelling scenario the plant produces 150m litres of ethanol and consumes 770,000 tonnes of wood per year. 
The total investment required to build the plant would be NZ$170m.  The breakeven selling price is NZ$0.72 per litre.

This project developed by Watercare Services Ltd investigated the use of a 250kW binary cycle generator to capture and use waste heat that was otherwise sent into the atmosphere in the flue gases from the existing biogas cogeneration engines at the Mangere Wastewater Treatment Plant in Auckland.

EnviroWaste Services investigated a project that would comprise waste heat recovery equipment being fitted to existing landfill gas engines at the Hampton Downs landfill in the Waikato, and an additional packaged burner unit being fitted to combust the landfill gas which is surplus to the gas engine demand.