Abstract
The impact of non-domestic wastewater (nDWW) on water bodies every day is increased, considering the different pollutants that are entering and these are not regulated, also that the effects of these are not known in the ecosystems. In the case of the pharmaceutical industry, the various products they generate can contribute from non-steroidal anti-inflammatory analgesics (NSAIDs), antihypertensives, hormones, antibiotics, among others; they are being detected in surface waters and it is necessary to create strategies to improve treatment systems and thus reduce their effects on water systems. In this work, the native microorganisms from nDWW of the pharmaceutical industry were used to evaluate their ability to influence the removal of organic matter, working in mixed culture, where it was evidenced that in a 24 hours they could remove 45.82 % of the organic matter measured by the chemical oxygen demand (COD) and at 48 hours 90.59 % removal. The above shows that the use of microorganisms can contribute to the reduction of COD and pollutants in an effective, environmentally friendly and, more efficient way than conventional methods. Besides, the qualities of tolerance to four NSAIDs by 16 morphotypes are evidenced, and how they can be profiled in the future to be potentialized and reach the mineralization of these emerging pharmaceutical pollutants.
Highlights
Water is one of the most important compounds on the planet and its use for human and industrial consumption, preservation of flora and fauna, is given by the physical, chemical and biological characteristics, which can be modified by the entry of effluents or runoff [1]
The native microorganisms from non-domestic wastewater (nDWW) of the pharmaceutical industry were used to evaluate their ability to influence the removal of organic matter, working in mixed culture, where it was evidenced that in a 24 hours they could remove 45.82 % of the organic matter measured by the chemical oxygen demand (COD) and at 48 hours 90.59 % removal
On the other hand, regarding the BOD5 parameter, an average of 648.33 ± 2.88 mgO2/L was found (Table 1), evidencing the presence of biodegradable organic matter and for the COD the value was 1522.33 ± 2.51 mg O2/L (Table 1) indicating that the nDWW of the equalizer contains non-biodegradable organic matter, attributable to the production of non-steroidal anti-inflammatory drugs (NSAIDs), which are complex carbon molecules difficult to assimilate by microorganisms [26, 27]
Summary
Water is one of the most important compounds on the planet and its use for human and industrial consumption, preservation of flora and fauna, is given by the physical, chemical and biological characteristics, which can be modified by the entry of effluents or runoff [1]. To establish the impact of non-dDomestic wastewater (nDWW), it must begin with the determination of the physical, chemical and biological parameters. In this way, knowing what its characteristics are, it can be established what will be its effect on the water body that receives it and the type of pollutant that enters [5,6,7]. NDWW contains contaminants such as fats and oils, heavy metals, organic matter, excrement, disinfectants, soaps, among others, which are regulated by existing legislation and determining their concentrations allows defining the type of treatment that must be carried out before being discharged into the environment [8]
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