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NIWA biogas system improves pig farm efficiency

posted Mar 16, 2012, 2:06 AM by ema-1 ema-1   [ updated Mar 22, 2012, 3:13 AM ]
"An innovative biogas system technology, developed by NIWA in Hamilton, has been embraced by the Australian pork industry.

By converting pig effluent to biogas,which is then used for heat and electricity, it reduces the carbon emissions of the user. This means it can claim carbon credits resulting from the reductions in emissions from the effluent.

The first pond based biogas system that NIWA designed was a purpose-built 7000m3 covered anaerobic pond for Steve Lepper’s piggery in Taranaki. At the Lepper piggery, the biogas is used for electricity generation and heating in a combined heat and power unit (CHP). As well as providing the majority of the piggery’s electricity needs during daytime, waste heat from the generator is used in a reticulated hot water system for keeping young pigs warm.

Steve Lepper expects to recoup his $120,000 investment ($30,000 of which came from an EECA grant) within three years. The Lepper biogas system won the Small-Medium Business category in EECA awards in 2010"

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