Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Ecological Engineering & Environmental Technology

2 2023

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Physicochemical Characterization and Evaluation of the Organic Pollution of Domestic and Industrial Wastewater in the City of Fez

Bouzidane Zahra, Beniaich Ghada, Kaioua Samiha, Rezouki Sanae, Mansouri Dalal, El Mahjoub Aouane, Eloutassi Noureddine

Ecological Engineering & Environmental Technology

2023

Vol. 24, iss. 4

177-186

Environmental concern implies a degree of basic dynamism aimed at safeguarding ecosystems against any type of pollution and better management of the environment. Wastewater is mainly composed of water and other materials that represent only a small part of wastewater, but can be present in sufficient quantities to endanger public health and the environment, so before discharging wastewater into the natural environment, it is necessary to define its parameters to have information on the composition and qualitative and quantitative characteristics of wastewater and their impacts on the receiving environment. The goal of the conducted work was to determine the degree of wastewater pollution in Fez based on the results of physicochemical analysis of samples collected from various stations in 2021. The temperature varies between 24.6°C and 29.9°C in wet periods and between 26.5°C and 38.3°C in dry periods, the pH is alkaline to neutral with high turbidity levels, especially in wet periods, for dissolved oxygen, the wastewater of the city of Fez is under saturated in oxygen, which accentuates anaerobic fermentation and the release of bad odors, and the average values of the BOD5 are higher than 100 mg O2/l considered. These wastewaters are rated as being of very poor quality. COD values are greater than 500 mg of O2/l, which is considered the limit value for direct rejections. Nitrate concentrations are highest in S1, with a value of 12.83 mg/l in the dry period. The recorded contents of orthophosphates and total phosphorus do not vary significantly. The obtained values are higher than the WHO recommended wastewater discharge standards. At the conclusion of this research, it was discovered that the wastewater in the city of Fez is of poor to very poor quality.

Evaluation of the Impact of Anthropic Activities on the Physico-Chemical and Microbiological Parameters of the Water of the Wadi Inaouene and Its Tributaries

Rezouki Sanae, El-Haji Sarra, Moubchir Tarik, Faouzi Jihan, Bendaoud Ahmed, Beniaich Ghada, Allali Aimad, Eloutassi Noureddine

Ecological Engineering & Environmental Technology

2023

Vol. 24, iss. 5

282--294

Water is a basic human requirement that is required in many processes, particularly those performed in households. However, in most circumstances, this critical product does not fulfill commonly recognized safety criteria. Various anthropogenic activities cause various forms of pollution; as a result, their physicochemical and biological components can pose major hazards to the environment and human health. The objective of this research was to evaluate the microbiological parameters along the Inaouene wadi and its tributaries, as well as their correlation with the physicochemical characteristics. In spring 2020, the following physicochemical and microbiological studies were conducted: ICP-AES was used to assess metals. The most polluted stations are located upstream (S1, S3, S4, S5, and S6). The highest concentrations of sulfate, orthophosphate, BOD5 , and nitrogen compounds are found at these stations. Illegal solid and liquid discharges from the tributaries S1 and S5, as well as urban settlements built on the banks of the Inaouen River, are to blame for this pollution, which has a direct and significant impact on water quality throughout the wadi. Furthermore, heavy metals (Zn, Fe, Co, Cr, Ag, and Cu) are abundant upstream of Inaouen and pass downstream. The monitoring of the evolution of microbiological pollution of wastewater has revealed a significant contamination of these waters upstream of the Wadi by the 3 groups of germs indicative of a fecal contamination and the presence of Listeria monocytogenes and salmonella in the upstream stations and especially S1, S3 and S5. The PCA revealed that the indicator bacteria of fecal contamination present negative correlations with dissolved oxygen, thus the lack of dissolved oxygen leads to a proliferation of germs in the water.