Water is the essential element of life for health as a fundamental right of man. Water quality can be changed by some natural chemical, physical or biological processes. The basis for these changes is organic or animal residuals that are decomposed by the activity of

microorganisms normally present in water.


  The main advantages of using the lump in aquapony are:

– fish, especially Tilapia, and Ciprinids, will eat the plant but this is not a problem because it will develop faster than fish can eat. This is another reason why lobster is very attractive for those who use the aquaponic method;

– Dried biomass contains up to 40 % of the protein that can be capitalized.

– lobster plays a significant role in the removal of nitrogen and phosphorus from water.

The main drawbacks of using lump in aquapony are:

– the lobster has a high water content (86-97%), so the protein content of the wet ling is low and can reach 2%;

– grows faster than fish can eat; growth is unstoppable, and this can become a problem. It can come  out of fish ponds and enter pipes, pumps, etc

Lemna complements and deepens this step by making it much better purified water, eliminating in fact the bacterial exotherms that all bacteria can produce and which are toxic. However, these are nutrients for the roots of small cranberry plants. Of all five species, following the experiments carried out for 2 years (2017-2018), we chose for the pilot phase (at the Frasin research resort in the north of the country, where we have according to the plan for the project the industrial phase), only two species – Lemna minor (common lobster) and Lemna trisulca. Experimental fish have known and measured quantities of known fish biomass (weights for species and total biomass from Frasin station producing organic effluents – waste and impurified water – nitrites, nitrates, ammonia, hydrogen sulfide).

The experimental results highlighted the capacity of the two Lemna species to achieve the cleaning efficiency. To conduct experiments, DFR Systems has developed sketches after which the filtering system was developed at the Frasin Research Resort.

Evolution of nitrate in the water filtered by Lemna trisulca:

 

Conclusion

      The experiment data show that the Lemna minor model has average efficiency as seen from pollutant ion concentration values ​​that decrease during the experiment by 45 %.

      The model with Lemna trisulca seems to be more useful in terms of the system used as well as the efficiency of the removal process of the pollutants.

      Experimental data on a macro scale confirm the results obtained at the stage where the system was performed at laboratory and pilot level.

DISSEMINATION

Articles:

      „Experimental research compared aquaculture of certain species of the genus Lemna with demonstration of environmental requirements and of the adaptations to environmental conditions specific to aquatic ecosystems eutrof-politrofe”. – Will be published soon in „Deltas and Wetlands” magazin.

Scientific poster presented at the Deltas and Wetlands-2019 Symposium (Tulcea, June)

     „The role and influence of abiotic factors in Lemna minor growth and productivity under experimental laboratory conditions” – It will soon be published in „Current Trends in Natural Sciences” magazine.

– Scientific poster presented at theCurrent Trends in Natural Sciences” Symposium (Pitesti)

Lemna minor and Lena trisulca

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Scientific poster presented at theCurrent Trends in Natural Sciences” Symposium (Pitesti)

„The role and influence of abiotic factors in Lemna minor growth and productivity under experimental laboratory conditions” – It will soon be published in „Current Trends in Natural Sciences” magazine.

 

PosterPresentations-V5

Scientific poster presented at the Deltas and Wetlands-2019 Symposium (Tulcea, June)

 

„The role and influence of abiotic factors in Lemna minor growth and productivity under experimental  laboratory conditions” – It will be soon  published in „Current Trends in Natural Sciences” magazine.

 

PosterPresentations-V5

Diploma of participation on the „Deltas and Wetlands-2019 Symposium (Tulcea)”

 

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