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From an engineering perspective, the plant is well designed, incorporating features to minimize maintenance and even generate revenue through production of biogas and fertilizer.
Living in eastern Canada, Tave van Zyl is used to very cold winters, which sparked her interest in renewable sources of heat - specifically methane, or biogas .
Some cleaning is also required but digesters exist that produce sufficiently clean biogas for conventional engine cogenerators, as well as a high grade compost for agricultural purposes.
Utilization of manure implies providing an economic return from manure by use of its nutrient elements as a fertilizer or by converting it to biogas or compost that may increase its value, or by combustion to convert it to heat.
Another creative idea of the time saw 80 council vehicles powered by biogas produced at the Christchurch sewage plant.
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