Stimulating algal growth through wood ash fertilization in the Åkerberg pit lake, northern Sweden

Paulsson, Oscar; Widerlund, Anders; Conrad, Sarah

doi:10.1016/j.apgeochem.2023.105616

Cited by 2 publications

(2 citation statements)

References 39 publications

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“…The high fluctuation of dissolved oxygen is due to the higher range of oxygen solubility concentration in Pond 2. Dissolved oxygen levels in the waters will fluctuate dynamically due to photosynthesis and water circulation [31].…”

Section: Oxygen Solubility Levelmentioning

confidence: 99%

Oxygen Transfer Rate Efficiency of Paddle Wheel Aerators in Intensive Shrimp Ponds

Ariadi,

Linayati,

Mujtahidah

2023

BIO Web Conf.

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The purpose of this study was to determine the oxygen transfer rate efficiency of paddle wheel aerators in intensive shrimp farming. This study was conducted with the causal ex-pose facto concept by comparing the performance of paddle wheel aerator. The results showed that water quality in Pond 1 (1 HP) and Pond 2 (2 HP) only brightness which do not comply with water quality standards. The oxygen transfer rate paddle wheel aerator was 1 HP of 3.20 (2.82-3.65) mgO2/hours and for 2 HP of 2.12 (1.68-2.89) mgO2/hours. The dissolved oxygen in Pond 1 (1 HP) was 5.25 mg/L and Pond 2 (2 HP) was 5.63 mg/L. The shrimp growth rate in pond 1 is 1.95 (0.01-4.0 gr/day) and pond 2 is 1.25 (0.01-2.55 gr/day). Dissolved oxygen in pond 1 (1 HP) ranged from 4.15-7.26 mg/L and pond 2 (2 HP) ranged from 4.03-8.31 mg/L. Dynamic modeling results show a description the energy input to paddle wheel aerator will gradually decrease from 2 kW to 0.25 kW. The results of this study concluded that the use of a 1 HP paddle wheel aerator has a better oxygen transfer rate and shrimp pond performance than using a 2 HP paddle wheel aerator.

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Section: Oxygen Solubility Levelmentioning

confidence: 99%

Oxygen Transfer Rate Efficiency of Paddle Wheel Aerators in Intensive Shrimp Ponds

Ariadi,

Linayati,

Mujtahidah

2023

BIO Web Conf.

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“…Wood ash is most often used in agriculture for liming and potash fertilization [1] [2] [3]. It is sometimes combined with other substances to enhance its ferti-lising effects [4] [5] [6].…”

Section: Introductionmentioning

confidence: 99%

Physico-Chemical Characterization of Wood Ash for Agronomic Purposes

Ajavon,

Bodjona,

Bafai

2024

JACEN

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The oil refinery of the food products company SOPAL, located in the port area of TOGO, produces an average of 200 kg of eucalyptus wood ash per day. This ash is stored in large quantities within the premises of the refinery, without any disposal solution. The aim of this study is to identify the physico-chemical properties of SOPAL's wood ash for agronomic valorization. Physico-chemical analyses reveal the presence of major and secondary elements such as potassium (15.71 g/kg DM), phosphorus (27.90 g/kg DM), calcium (9.76 g/kg DM), magnesium (0.03 g/kg DM), sodium (1.24 g/kg DM), iron (1.49 g/kg DM) and manganese (7.82 g/kg DM). The pH is alkaline (12.97) with fairly high conductivity (24.10 mS/Cm). Heavy metals identified are cobalt (0.19 mg/kg DM), cadmium (0.10 mg/kg DM), lead (1.14 mg/kg DM), copper (19.77 mg/kg DM) and nickel (12.82 mg/kg DM). The results show that the ash contains considerable amount of major and secondary elements for agronomic uses.

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Stimulating algal growth through wood ash fertilization in the Åkerberg pit lake, northern Sweden

Cited by 2 publications

References 39 publications

Oxygen Transfer Rate Efficiency of Paddle Wheel Aerators in Intensive Shrimp Ponds

Oxygen Transfer Rate Efficiency of Paddle Wheel Aerators in Intensive Shrimp Ponds

Physico-Chemical Characterization of Wood Ash for Agronomic Purposes

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