Maseno University Repository

Efficiency of pumpkin (Cucurbita pepo), sweet wormwood (Artemisia annua) and amaranth (Amaranthus dubius) in removing nutrients from a smallscale recirculating aquaponic system

Show simple item record

dc.contributor.author Gichana, Zipporah
dc.contributor.author Liti, David
dc.contributor.author Wakibia, Joseph
dc.contributor.author Ogello, Erick
dc.contributor.author Drexler, Silke
dc.contributor.author Meulenbroek, Paul
dc.contributor.author Ondiba, Robert
dc.contributor.author Zollitsch, Werner
dc.contributor.author Waidbacher, Herwig 2019
dc.date.accessioned 2020-01-24T09:04:37Z
dc.date.available 2020-01-24T09:04:37Z
dc.date.issued 2019-08-28
dc.identifier.uri https://repository.maseno.ac.ke/handle/123456789/1387
dc.description.abstract In aquaponic systems, plants absorb dissolved nutrients from aquaculture wastewater for their growth. The removal of nutrients allows reuse of water and minimises wastewater discharge to the surrounding environment. This study evaluated the relative nutrient removal efficiencies of three plant species and the performance of Nile tilapia (Oreochromis niloticus) in a small-scale aquaponic system. Three aquaponic systems were assigned as treatments PU (pumpkin), SW (sweet wormwood) and AM (amaranth). Physical-chemical water quality parameters were measured in the fish tanks as well as hydroponic inlets and outlets. Fish sampling was done every 2 weeks for 60 days. Results showed significantly (p < 0.05) lower nutrient concentrations in the hydroponic outlets than the inlets. There was no significant difference in nutrient removal efficiency of the plants (p > 0.05) for all the tested nutrients except for phosphorus. Phosphorus removal was substantially high in PU (75.5 ± 16.8%) than SW (47.36 ± 14.5%) and AM (40.72 ± 13.2%). In addition, the SW system had better (p < 0.05) relative growth rate (0.06 ± 0.00) than that of PU (0.05 ± 0.00) and AM (0.05 ± 0.00). Nitrogen and phosphorus content in plant tissues was significantly high (p < 0.05) in SW and PU plants respectively. Water quality parameters had a significant influence on the growth of fish (p < 0.05). The growth of fish was not different (p > 0.05) in the three treatments. The findings indicate that the tested plants can reduce nutrients in aquaculture discharge water en_US
dc.publisher Aquaculture International en_US
dc.subject Aquaponic system . Biofilter. Nutrients. Recirculating aquaculture system en_US
dc.title Efficiency of pumpkin (Cucurbita pepo), sweet wormwood (Artemisia annua) and amaranth (Amaranthus dubius) in removing nutrients from a smallscale recirculating aquaponic system en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search Maseno University Repository


Browse

My Account