Elahe Khayyami; Mahdi Pahlevani; Ebrahim Esmailzadeh
Abstract
Background and purpose:This study aimed to evaluate the performance of biological process treatment (Modified Ludzack Ettinger) of municipal wastewater treatment plant No. 4 in Mashhad- Alteymur.Materials and methods: The performance of treatment plant was evaluated in a 12-month period from March 2020 ...
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Background and purpose:This study aimed to evaluate the performance of biological process treatment (Modified Ludzack Ettinger) of municipal wastewater treatment plant No. 4 in Mashhad- Alteymur.Materials and methods: The performance of treatment plant was evaluated in a 12-month period from March 2020 to February 2021. Based on flow changes, a sampling of raw sewage inlet and outlet effluent was done in combination. Moreover, studied parameters, including BOD5, COD, TSS, TDS, EC, pH, total coliform, and fecal coliform were measured according to the methods presented in the standard method book for water and wastewater tests. ANOVA test was used to analyze the data and compare them.Results: Based on the results, the highest removal efficiencies are related to the parameters of T.C, FC, TSS, BOD5, COD, TDS, and EC, respectively, with 100, 100, 98.48, 97.88, 48.96, 25.97, and 25.88 percent, respectively. The significant removal efficiency of measured parameters in the effluent from wastewater treatment plant No. 4 of Mashhad (Altimour) shows the proper performance of MLE process system. The results of the ANOVA test to compare the removal efficiency of parameters in different seasons showed that the performance of treatment plant was not affected by the change of seasons.Conclusion: The amounts of pollutants were compared with the standard of the Environmental Protection Organization of Iran for discharge to the environment and using the wastewater. According to the studies performed on the tested parameters, the effluent is in line with the standards of the Environmental Protection Organization for irrigation and agriculture, surface water, and absorption wells, but for other uses and proper efficiency of the effluent, all aspects should be considered.
Elham Alsadat Heidari; hosein alidadi; maryam sarkhosh; Somayeh Sadeghian
Abstract
Background and Objectives: Cement production process produces million tons of by products such as dust, toxic gases and heavy metals associated with health (respiratory) risks and environmental pollution. The aim of the current paper is to assess the environmental impact of Zaveh Cement plant by using ...
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Background and Objectives: Cement production process produces million tons of by products such as dust, toxic gases and heavy metals associated with health (respiratory) risks and environmental pollution. The aim of the current paper is to assess the environmental impact of Zaveh Cement plant by using Iranian Leopold Matrix. Materials and method: The current descriptive analytical study examined the current status of the region's environment; then reviewing the technical sources of the project was performed in order to identify the most important activities of operation and construction phases. Finally, Iranian matrix method was selected to assess the environmental impact of cement plant. Results: Based on the obtained results, the major negative environmental impacts on the physical part include soil pollution and erosion, air pollution, and noise pollution, respectively. The major negative biological impacts are the impacts on plant and animal species density, and the quality of the habitat, respectively. According to the results of the evaluation conducted using Iranian matrix method on Zaveh-Torbat cement plant, with the separation of construction and operation, there is no column with values less than -3.1, and the number of rows with values less than -3.1 constitutes less than 50 %. Conclusions: According to the Iranian matrix, the project of Zaveh-Torbat cement plant is acceptable with the implementation of integrated environmental management strategies.