The management of undesirable cyanobacteria blooms in channel catfish ponds using a constructed wetland: Contribution to the control of off-flavor occurrences

The present study was carried out to evaluate the phytoplankton community and water quality in four parallel fishponds (FP1 to FP4) during one year. Some abiotic parameters of water column and phytoplankton was sampled in four sites, one in each fishpond. Similarity analysis showed that FP2 fishpond was markedly different for the others ponds with regard to phytoplankton community. Conductivity, orthophosphate, temperature, TSS and hardness parameters were significantly different (p<0.05) between fishponds and all limnological parameters were significantly different (p<0.01) among period (months). Organic matter and phosphorus of the sediment were significantly different (p<0.01) only among fishponds. In current study Chlorophyceae and Bacillariophyceae occurred in most months. Cyanobacteria density in April and May was higher in all fishponds, at FP3 represented 71.4% in April and FP1 represented 78.7% in May of total reported, with chlorophyll-a content lower than 41 mg.L -1. The physical and chemical parameters of fishponds water constituted relations between the parameters and algae occurrence. The present study however, indicated that Cyanobacteria was more frequent in the fishponds after the fish grow-out period (April), and the water quality should be monitored more frequently in this period, due to the high total phosphorus, orthophosphate and chlorophyll-a contents.Keywords: algae, aquaculture, physical and chemical parameters, water quality. Variação sazonal dos parâmetros bióticos e abióticos em tanques de piscicultura com disposição paralela de região neotropicalResumo O presente estudo avaliou durante um ano a comunidade fitoplanctônica e os fatores abióticos da água de quarto tanques de piscicultura (FP1 ao FP4) com disposição paralela. Alguns fatores abióticos da água e do fitoplâncton foram amostrados em quarto pontos, localizados um em cada tanque de piscicultura. . Os parâmetros físico-químicos da água dos tanques de piscicultura apresentaram relação com a ocorrência do fitoplâncton nestes sistemas. Os resultados deste estudo indicaram a maior frequência de Cyanobacteria no período após a engorda de peixes (abril) necessitando maior monitoramento da qualidade da água devido aos altos teores de fósforo total, ortofosfato e clorofila-a observados neste mês (abril) Palavras-chave: alga, aquicultura, variáveis físicas e químicas, qualidade da água.

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“…Differences in the phytoplankton biomass and composition have been found in ponds with different trophic status (Zhong et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Seasonal variation of biotic and abiotic parameters in parallel neotropical fishponds

2014

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“…As a result, the level of 2-MIB may be lower in city D. However, there are no significant differences for the levels of GSM among four cities; in other words, the lower 2-MIB levels of raw water in city D never necessarily equal the lower levels of GSM in city D similarly. It can be explained that the levels of two odorants were associated with multiple factors, including the species of algae, acidic condition of environment, rainfalls, and light density [18]. For example, growth and production of 2-MIB was characterized in the cyanobacterium Phormidium sp.…”

Section: Resultsmentioning

confidence: 99%

Geographical and Seasonal Patterns of Geosmin and 2-Methylisoborneol in Environmental Water in Jiangsu Province of China

Zhang

Peng

Jin³

et al. 2014

Journal of Analytical Methods in Chemistry

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This study was conducted to obtain the basic data of two common odorants—geosmin and 2-methylisoborneol (GSM and 2-MIB)—in environmental water. More specifically, the headspace solid-phase microextraction coupled to gas chromatography mass spectrometry (HS-SPME/GC-MS) was applied to determine the levels of GSM and 2-MIB in water samples, and the samples were collected depending on water sources, conventional treatment processes, and seasons. The significant difference was shown for the 2-MIB levels of source water (P < 0.05), the concentrations of GSM and 2-MIB decreased significantly as treatment process of tap water moved forward (P < 0.0001), and the significant differences for the levels of GSM and 2-MIB were observed among three sampling periods (P < 0.01). The levels of GSM and 2-MIB in all water samples were lower than 10 ng L−1, the odor threshold concentration (OTC), and the conventional treatment process plays a significant role in removing odorants in tap water.

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“…2). Microcystis was included in the odour-producing list because there were claims that some species have the potential to produce geosmin apart from hepatotoxins (microcystins) [8]- [10]. These cyanobacteria except Phormidium were also found in a previous study [11] conducted in Phayao Lake.…”

Section: Water Quality and Chlorophyll A Levelsmentioning

confidence: 99%

Study of Geosmin and 2-Methylisoborneol (MIB) Producers in Phayao Lake, Thailand

Whangchai¹,

Pimpimon²,

Sompong³

et al. 2017

IJBBB

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This study aimed to investigate geosmin and 2-methylisoborneol (MIB)-producing cyanobacteria and actinomycetes as sources of earthy-musty odours in Phayao Lake, northern Thailand. Known earthy-musty odour producers, Lyngbya sp., Phormidium sp., Anabaena sp. and Oscillatoria sp., were found as the dominant genera of cyanobacteria in the lake water.  Odour-producing Streptomyces spp. were also found to be significantly present in the lake sediment where majority of Streptomyces spp. (63%) isolated were geosmin-producers. The significant density of actinomycetes, particularly Streptomyces, suggests that they played as important contributor to the production of geosmin and MIB in the lake.

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The management of undesirable cyanobacteria blooms in channel catfish ponds using a constructed wetland: Contribution to the control of off-flavor occurrences

Cited by 56 publications

References 46 publications

Seasonal variation of biotic and abiotic parameters in parallel neotropical fishponds

Seasonal variation of biotic and abiotic parameters in parallel neotropical fishponds

Geographical and Seasonal Patterns of Geosmin and 2-Methylisoborneol in Environmental Water in Jiangsu Province of China

Study of Geosmin and 2-Methylisoborneol (MIB) Producers in Phayao Lake, Thailand

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