Water treated wastewater can be safe for aquaculture


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Although aquaculture in aquatic waters is a worldwide practice, there is a great deal of scientific research on whether organic microbes are safe to consume.

New research Aquaculture Researchers at Ben-Gurion University in the Negev found that organic water pollutants (OMPs) – elements in heavy metals, pharmaceuticals and personal care products, as well as pesticides, solvents and detergents – cause minimal accumulation of fish. In addition, wastewater does not affect commercially important properties of fish.

"The presence of microbes in the water can cause fish to have toxic biological impacts including fish, including mutations and the feminization of male fish, by endocrine disruptions from exposure to OMPs. Drylands, Jacob Blaustein Desert Research Institutes.

Wastewater Treatment (TTWW) is the third and final stage of the treatment process, which improves the quality of the wastewater before it can be reused, recycled or removed from the environment. The treatment removes other inorganic compounds and substances, such as nitrogen and phosphorus, but not organic compounds.

In the laboratory study, juvenile carp (Cyprinus carpio) was grown at 0%, 50%, and 100% TTWW for five months. One in seven out of 40 screened OMPs found water samples. Of the 19 analyzed OMPs in fish tissues, four were identified in fish. Carbamazepine, anticonvulsant and diclofenac, an anti-inflammatory drug, has been reported in fish muscle and liver, which increased in 50% and 100% TTWW measurements, respectively. Concentrations of carbamazepine-epoxide and benadryl (diphenhydramine) were detected in fish muscle beyond quantitative quantification (LOQ), and diphenhydramine was detected above the LOQ level, two liver samples that were 100% TTWW.

"Based on the findings, TTWW can be successfully used for adult fish, and fish grown with TTWW meet all existing standards for heavy metal accumulation," Zilberg said. However, further research on the accumulation of OMPs in different fish feed habits is needed to ensure public health during TTWW use in aquaculture. ”

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More info:
Inbal Zaibel et al, Third Wastewater as a Potential Water Source for Sustainable Aquaculture: A Laboratory Scale Experiment with Cyprinus Carpio, Aquaculture (2020). DOI: 10.1016 / j.Aquaculture.2020.735161

Provided by
American Associates, University of the Negev Ben-Gurion

Wastewater Can Be Safe for Aquaculture (2020, March 13)
Read 13 March 2020
https://phys.org/news/2020-03- wastewater-safe-aquaculture.html

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