List of Articles chemical coagulation

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  1 - Feasibility Study of Mushroom Plant Effluent Treatment Using Chemical and Electrical Coagulation Methods
  Abolfazl Ranai Lessan Hossein Zare
  10.30495/jest.2022.63432.5515
  Background and Objective: Due to strict environmental laws and the problem of water shortage in recent years, industrial wastewater treatment is necessary for reuse. Mushroom industry effluents due to the use of fertilizers and pesticides, sanitizers and detergents cont More

  Background and Objective: Due to strict environmental laws and the problem of water shortage in recent years, industrial wastewater treatment is necessary for reuse. Mushroom industry effluents due to the use of fertilizers and pesticides, sanitizers and detergents contain various organic and inorganic pollutants, in which the pollution parameters such as detergent, turbidity, BOD and COD are higher than the standard limits. In this research, the effluent treatment of the mushroom factory has been investigated for reuse in for reuse in mushroom cultivation and composting.Material and Methodology: In this study, electrical and chemical coagulation methods were used to treat the wastewater and remove the parameters of BOD, COD, turbidity and detergent. The electrocoagulation method was performed at potential differences of 10, 20 and 30 volts and at times of 15, 30, 45, 60 and 75 minutes with iron and aluminum electrodes. In the chemical coagulation method, the effect of two coagulants, poly aluminum chloride and aluminum sulfate, in the presence of anionic polyelectrolyte coagulant on the effluent treatment was investigated.Finding: In the electrocoagulation method, at a potential difference of 30 volts for 60 minutes, the removal efficiencies of COD and BOD were 59.1% and 46%, respectively. In chemical coagulation method with coagulant dose of 75 mg/l at pH 6, the highest removal efficiencies for COD, BOD, turbidity and detergent were obtained 61.6, 47.6, 82.1 and 75.5%, respectively.Discussion & Conclusion:  The results showed that the removal efficiency of BOD, COD, detergent and turbidity parameters by chemical coagulation is slightly higher than electrocoagulation method. Also, in the chemical coagulation method, poly aluminum chloride coagulant has better performance than both aluminum sulfate and the combination of two coagulants. Manuscript profile
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  2 - Optimizing the process of chemical coagulation and electrocoagulation in the treatment of Shahid Tandgoyan petrochemical wastewater
  hamid reza nooraeinia SOMAYEH Torani
  10.30495/jacr.2023.1974259.2070
  In this research, using the response surface method, the efficiency of the chemical coagulation and electrocoagulation processes in the treatment of Shahid Tangyuan petrochemical wastewater was modeled and optimized. The composition of Shahid Tangyuan petrochemical wast More

  In this research, using the response surface method, the efficiency of the chemical coagulation and electrocoagulation processes in the treatment of Shahid Tangyuan petrochemical wastewater was modeled and optimized. The composition of Shahid Tangyuan petrochemical wastewater containing 20-60 ppm of cobalt and manganese was used in this experiment. By employing Design Expert software, an excellent agreement was obtained between the model and experimental observations in the removal efficiency of cobalt and manganese. By using the chemical coagulation method at a temperature of 25 °C, a mixing speed of 120 rpm and time of 90 minutes, pH equal to 6, and initial concentration of 20 ppm for cobalt and manganese, the best removal efficiency of cobalt and manganese was 59.8 and 57.2%, respectively. The optimal parameters in the electrocoagulation process to remove cobalt and manganese were 46 minutes of equilibrium time, pH equal to 6, and voltage of 25.8 volts. The removal efficiency was 98.3% for cobalt and 96.4% for manganese by combined chemical coagulation and electrocoagulation processes. Manuscript profile