Biological Water Treatment Residuals from Plants Quinoa Processors

This study aimed to carry out a biological treatment of the wastewater of plants that process quinoa and check whether they complied with the current environmental quality standard for the wastewater discharge since this type of water generates highly polluting effluents. For this, an initial characterization of the discarded water was carried out and the following parameters that are not in line with the current regulations for its discharge were determined: oils and fats (9 mg/L), real color (3520 units of Pt/Co), settable solids (13,500 mg / L), total suspended solids (1195 mg/L), total solids (4644 mg/L), total nitrogen (250 mg/L), COD (5000 mg/L), BOD5 (2990 mg/L), surfactants (17.5 mg/L) and fecal coliforms (240 CFU/100 ml). Next, the biodegradability index was calculated with which the possibility of executing the said treatment to the waste water was corroborated; for this, a primary settler, an aeration tank with diffusers as a biological reactor, at the laboratory level, a secondary settler and finally an anthracite and sand filter were used. This way, we were able to obtain treated water that complied with the current legislation for the discharge of effluents to a body of fresh water with a pollutant removal percentage of 97%. In this study, we provide guideline for the recirculation of water in a similar manner for other relevant purposes. Keywords: Chemical engineering, Biological treatment, Quinoa washing, Biodegradability index, Contaminating parameters. Resumen El presente estudio tuvo como objetivo realizar un tratamiento biológico al agua residual de plantas que procesan quinua y que éstas cumplan con la norma de calidad ambiental vigente para su descarga puesto que este tipo de aguas generan efluentes altamente contaminantes; para ello se ejecutó una caracterización inicial del agua que se desechaba en este tipo de industrias y así se determinó los parámetros que no cumplen con la normativa vigente para su descarga, siendo éstos: aceites y grasas (9 mg/L), color real (3520 Unds de Pt/Co), sólidos sedimentables (13.500 mg/L), sólidos suspendidos totales (1195 mg/L), sólidos totales (4644 mg/L), nitrógeno total (250 mg/L), DQO (5000 mg/L), DBO5 (2990 mg/L), tensoactivos (17,5 mg/L) y coliformes fecales (240 UFC/100 ml); una vez analizados dichos parámetros se procedió a calcular el índice de biodegradabilidad con el cual se corroboró la posibilidad de ejecutar dicho tratamiento al agua residual, para ello se utilizó a nivel de laboratorio un sedimentador primario, un tanque de aireación con difusores como reactor biológico, un sedimentador secundario y por último un filtro de antracita y arena; de esta manera se logró obtener un agua tratada que cumple con la legislación actual para la descarga de efluentes a un cuerpo de agua dulce con un porcentaje de remoción de contaminantes del 97% y dando la pauta para que incluso el agua pueda ser recirculada en el mismo proceso o reutilizada para otro fin pertinente. Palabras Clave: Ingeniería química, tratamiento biológico, lavado de quinua, índice de biodegradabilidad, parámetros contaminantes.

Pencegahan Dampak Lingkungan Pada Industri Pewarnaan Melalui Pendekatan Penilaian Siklus Daur Produk

The home-scale coloring industry is currently starting to develop with various models and effects which result in the production of various phases of solid, liquid, and gas emissions. The purpose of this study is to measure the environmental impact and ensure that life management minimizes the impact of recycling industrialdye . This research was conducted by direct industry observation methods and a literature review on the management of industrial waste. Environmental impact calculations were completed carried out using the 2018 Environmental Product Declaration (EPD) method on SimaPro 9.1.1 with an ecoinvent 3 database. The results of the environmental impact assessment should be managed according to the effects of water scarcity, acidification, and eutrophication. Pollution prevention can occur by treating industrial wastewater dye . Wastewater treatment can be performed by biological processes based on the biodegradability index. The biodegradability index of 0.3 indicates that wastewater can be treated by the activated sludge process and by moving the bed biofilm reactor (MBBR).

A study on novel coupled membrane bioreactor with electro oxidation for biofouling reduction

The present study focuses on a novel method to integrate the electro-oxidation process with membrane bioreactor to reduce biofouling and increase the biodegradability index. Here, we used electro-oxidation as pretreatment with membrane bioreactor operating at a current density of 1.5 mA/cm2 with hydraulic retention time at six h. The mixed liquor suspended solids concentration was maintained constant at 3,200 mg/L throughout the experiment for 30 days. The results obtained were promising with the percentage removal of COD, TOC, total nitrogen, and chlorides were in the range of 97%, 90%, 94%, and 15%, respectively, which was comparatively higher than the existing membrane bioreactor. The biodegradable index of treated water was higher, reaching a maximum of 0.6, which is remarkably high compared with 0.3 in a membrane bioreactor. The integrated electro-oxidation process was efficient for the complete removal of pollutants from wastewater, which was confirmed using gas chromatography. In addition, the phytotoxicity test showed a significantly higher quality of treated water compared with that of raw tannery effluent. Hence, our proposed integrated electro-oxidation process can be used to decrease biofouling with increased biodegradability index as a replacement for MBR.