Swansea University

Mu

ssel

sAliv

e2

01

3

Photo by Sara Barrento

Sara BarrentoIngrid Lupatsch

Alex Keay

The

Depuration trial

Conditions of approval

Bulk bins require a minimum flow rate 6500L/h per bin for 250kg of mussels to keep minimum oxygen levels, that is above 5 mg/L ... to keep oxygen > 5mg/L or 50%

Conditions of approval

But pumping water is expensive,

as it consumes energy and increases the carbon footprint…

Can oxygen be maintained

above 5 mg/L at flows lower

than 6500 L/h?

6500L/h

6500L/h3000L/h

3000L/h2500L/h

2500L/h

Different Flows Regimes tested for 42 h

Mussels were harvested and graded as usual

… and placed in the bins

12.6 ̊C

12.6 ̊C

Oxygen sampling

20 hours24 hours42 hours

30 min90 min7 hours

False Floor

FF

Bottom

MiddleMC

Top

Drain

ResultsOxygen (mg/L) at 12.6 ̊C

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

FF Bottom Middle MC Top Drain

Oxy

gen

(m

g/L

)

2500 L/h 3000L/h 6000 L/h6500 L/h

* *

79 %

81 %

Drain

83%

87 %

85 %72 %

83 %77 %

ResultsOxygen (%)

Can oxygen be maintained

> 5 mg/L at flows lower

than 6500 L/h?Yes, 2500 L/h and

temperature <12.6⁰C

Dissemination

“A novel event in this conference this year was to present the results of science projects in which ASSG is interested or a partner. Sara Barrento got this off to an excellent start with a lively presentation on MusselsAlive.”

The Grower, December 2012

Dissemination

A news article was written by Sara Barrento and published on the last edition of the Grower (March 2013).

Dissemination

A fact sheet was created to disseminate the main results and recommendations to the industry