Study finds use for dead carp

Study finds use for dead carp

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Carp fertiliser trial. Photo: Daniel McRorie

Carp fertiliser trial. Photo: Daniel McRorie

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WA researchers at Curtin University found that dead carp could be used successfully, from fertiliser to feed.

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WA researchers at Curtin University found that dead carp could be used successfully in a range of ways, from fertiliser to feed.

This could help use the large amounts of dead carp, which would be generated if government decided to introduce the carp virus.

The study investigated various options which could also be applied more broadly to deal with fish waste and found that converting carp into compost and liquid hydrolysate fertiliser are both potentially viable routes.

"Composting trials of up to 40 tonnes showed that the dead carp could effectively be used to produce a safe, nutrient rich compost for application in agriculture and horticulture," lead researcher Janet Howieson said.

"This is a viable option on both local and large scale alike."

National Carp Control Plan coordinator Jamie Allnutt said fermentative hydrolysis for making fertiliser and use of carp as an input for vermiculture had been shown to be technically viable for smaller community-based applications, and could be implemented based on the draft methods, protocols and costings in this work.

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The study also investigated, at small scale, the use of decomposing carp as feed for black soldier fly larvae, used to supplement fish feed in small scale aquaculture trials.

Using the nutrient rich water, which results from carp processing to act as input for biogas production, was also considered.

During the study, it became obvious that commercial operators are open to exploring carp utilisation options. This research project is an important part of the National Carp Control Plan.

The plan will be delivered to the federal government in late December.

The government will then decide on the next steps.

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