The effluents generated in the paper industry, such as black liquor, have a high content of lignin and other toxic components; however, they represent a source of lignin-degrading bacteria with biotechnological potential. Therefore, the present study aimed to isolate and identify lignin-degrading bacteria species in paper mill sludge. A primary isolation was carried out from samples of sludge present in environments around a paper company located in the province of Ascope (Peru). Bacteria selection was made by the degradation of Lignin Kraft as the only carbon source in a solid medium. Finally, the laccase activity (Um-L−1) of each selected bacteria was determined by oxidation of 2,2′-azinobis-(3-etilbencenotiazolina-6-sulfonate) (ABTS). Bacterial species with laccase activity were identified by molecular biology techniques. Seven species of bacteria with laccase activity and the abi...

ABSTRACT The effluent from the tanning process generates negative impacts on health and the environment because at this stage only 70% of the total chromium (Cr) used is used; whereby bioadsorption emerges as an alternative in the removal of heavy metals. In this regard, the objective of the present investigation was to evaluate the capacity of chromium removal in effluents from the tanning stage of the tannery Harold SAC tannery using as yeast sorbent of the genus Saccharomyces cerevisiae (S), Pichia guilliermondii (P) and the microbial consortium consisted of (S) + (P); These were isolated from agroindustrial waste. For the observation of yeast cells, an OLYMPUS brand binocular microscope, Mo.CX23LFS1, was used. The experimental procedure consisted of the use of 6 bioreactors of 250 ml conditioned with samples of effluent from the tanning stage, having the consortium (S + P) as sorbent...

La salinidad es un problema latente que está afectando en la fertilidad del suelo, en el Distrito de Salaverry, Trujillo, Perú; también ocurre este problema en los suelos, debido a que se encuentra en una zona costera lo cual genera que los suelos tenga una concentración muy alta de salinidad, el método que se utilizó es la cortina de paja, lo cual se va a recuperar los suelos salinos, siendo una técnica sencilla de emplear, conómica y sobre todo amigable con el ambiente, los resultados que se obtuvo con respecto al pH, durante los 5 días los datos obtenidos en el primer día de las 4 muestras fue de un promedio de 7.93, en el segundo día con un valor de 7.53, en el tercer día 7.64, en el cuarto día 7.32 y en el quinto día 7.28, acercándose al valor adecuado, lo mismo paso con la conductividad eléctrica donde las muestras el primer día la Conductividad eléctrica de las c...

El puerto pesquero de Paita, desde hace varios años presenta contaminación por metales pesados a causa de la industria y del sector pesquero. El objetivo general fue determinar la eficacia de la fitorremediación con macrófitos de agua contaminada por plomo en el puerto pesquero de Paita – Piura. La metodología es aplicada, exploratoria, cuantitativa, experimental y transversal debido a las características de la información utilizada, la planta fitorremediadora utilizada fue Eichhornia crassipes (Jacinto de agua). Dentro de los resultados obtenidos se obtuvo: pH de 6,75 en la etapa inicial y 7,73 con la aplicación de macrófitos al 30 %; para el parámetro Conductividad eléctrica, presentó 16,27 uS/cm en la etapa inicial y 28,33 uS/cm post aplicación de macrófitos al 30 %; el parámetro de Oxígeno disuelto, el cual presentó 2,69 (mg/l) en la etapa inicial, luego de la apli...

In this study, we aimed to determine the in vitro activity of Leuconostoc mesenteroides var. mesenteroides isolated from sugar-industry effluents to produce a dextran bioflocculant from sucrose as a low-cost substrate. L. mesenteroides strains present in residual cane juice from a sugar factory were isolated and biochemically identified using Mayeux, Sandine, and Elliker agar (MSE) as a selective medium. The strain number 3 (LM03) was biochemically identified as L. mesenteroides var. mesenteroides, which was used for this study. The concentration of dextran was quantified by dry weight, the morphology and purity were evaluated using Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). Flocculation was evaluated via turbidimetric assays in different pH ranges from sugar-industry effluents and doses of dextran. ...

There are several techniques for the removal of pharmaceuticals (drugs) from wastewater; however, strengths and weaknesses have been observed in their elimination processes that limit their applicability. Therefore, we aimed to evaluate the best techniques for the removal of pharmaceuticals from municipal and hospital wastewater. For this, a non-experimental, descriptive, qualitative–quantitative design was used, corresponding to a systematic review without meta-analysis. Based on established inclusion and exclusion criteria, 31 open-access articles were selected from the Scopus, ProQuest, EBSCOhost, and ScienceDirect databases. The results showed that high concentrations of analgesics such as naproxen (1.37 mg/L) and antibiotics such as norfloxacin (0.561 mg/L) are frequently found in wastewater and that techniques such as reverse osmosis, ozonation, and activated sludge have the best...

There are several techniques for the removal of pharmaceuticals (drugs) from wastewater; however, strengths and weaknesses have been observed in their elimination processes that limit their applicability. Therefore, we aimed to evaluate the best techniques for the removal of pharmaceuticals from municipal and hospital wastewater. For this, a non-experimental, descriptive, qualitative– quantitative design was used, corresponding to a systematic review without meta-analysis. Based on established inclusion and exclusion criteria, 31 open-access articles were selected from the Scopus, ProQuest, EBSCOhost, and ScienceDirect databases. The results showed that high concentrations of analgesics such as naproxen (1.37 mg/L) and antibiotics such as norfloxacin (0.561 mg/L) are frequently found in wastewater and that techniques such as reverse osmosis, ozonation, and activated sludge have the bes...