In this research, the quality of the wastewater discharged into the environment has been investigated. The effluent from solar desalination pond contains large amounts of TDS (3.68 grams per liter) and TH (6.50 grams per liter). Since the use of filter is not economical in this case, three types of commercial coagulants such as aluminum sulfate, ferric chloride and ferric sulfide have been used in this study. The main parameters such as effectiveness of three inorganic coagulants, ammonium sulfate, ferric sulfate, and ferric chloride, which separately help to remove hardness, have been studied. According to the results, using laboratory test, 25/g of ferric sulfate as coagulant is best coagulant mass and the ratio of 4 to 3 for auxiliary coagulant (sodium carbonate and sodium hydroxide) to coagulant will be best ratio. Also, the mixing rate of 120 rpm in the first reactor will give the best mixing speed. These conditions will lead to 0.348 grams per liter of TDS, 0.345 grams per liter of TH and 0.195 grams per liter of calcium hardness and 300 micro Siemens electrical conductivity of the purified sample.
References
[1]
Xie, W.C., Tang, P., Wu, Q.D., Chen, C., Song, Z.Y., Li, T., Bai, Y.H., Lin, S.H., Tiraferri, A. and Liu, B.C. (2022) Solar-Driven Desalination and Resource Recovery of Shale Gas Wastewater by On-Site Interfacial Evaporation. Chemical Engineering Journal, 428, 132624. https://doi.org/10.1016/j.cej.2021.132624
[2]
Shivam, P., Nishi, M. and Shulabh, Y. (2022) An Overview of Factors Affecting Salt Gradient Solar Ponds. Materialstoday: Proceedings, 56, 2742-2752. https://doi.org/10.1016/j.matpr.2021.09.538
[3]
Farahbod, F. (2020) Mathematical Investigation of Diffusion and Decomposition of Pollutants as a Basic Issue in Water Stream Pollution. Arabian Journal of Geosciences, 13, Article No. 918. https://doi.org/10.1007/s12517-020-05890-x
[4]
Mahmoud, T., Farahbod, F. and Alireza, I. (2020), Empirical Evaluation of Proposed Treatment Unit for Saline Wastewater Softening. Journal of Applied Water Engineering and Research, 9, 89-106.
[5]
Tong, D.D. and Song, B. (2022) A High-Efficient and Ultra-Strong Interfacial Solar Evaporator Based on Carbon-Fiber Fabric for Seawater and Wastewater Purification. Desalination, 527, 115586. https://doi.org/10.1016/j.desal.2022.115586
[6]
Meng, Z.G., Li, Z.L., Li, Y., Zhang, C.Y., Wang, K.X., Yu, W., Wu, D.X., Zhu, H.T. and Li, W. (2022) Novel Nanofluid Based Efficient Solar Vaporization Systems with Applications in Desalination and Wastewater Treatment. Energy, 247, 123513. https://doi.org/10.1016/j.energy.2022.123513
[7]
Farahbod, F. (2020) Practical Investigation of Usage of Nano Bottom in the Production of Fresh Water from Brackish Wastewater in a Closed Shallow Solar Basin. Environmental Progress & Sustainable Energy, 40, e13496. https://doi.org/10.1002/ep.13496
[8]
Taherizadeh, M., Farahbod, F. and Ilkhani, A. (2020) Experimental Evaluation of Solar Still Efficiencies as a Basic Step in Treatment of Wastewater. Heat Transfer— Asian Research, 49, 236-248. https://doi.org/10.1002/htj.21608
[9]
Shi, Y.H., Cheng, X.F., Wan, D.J., Chen, X.X., Liu, Y.D., Zhang, Z.X., Wang, Y. and Gao, Y.F. (2022) Construction of the Micro-Electrolysis System by Fe0 and Clay-Carbon Derived from Oil Refining for the Removal of Ozone Disinfection by-Products. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 637, 128224. https://doi.org/10.1016/j.colsurfa.2021.128224
[10]
Farahbod, F. (2020) Simultaneous Use of Mass Transfer and Thermodynamics Equations to Estimate the Amount of Removed Greenhouse Gas from the Environment by a Stream of Water. Environmental Modeling & Assessment, 26, 779-785. https://doi.org/10.1007/s10666-020-09740-8
[11]
Osama, A., Hesham, T., Mohamed, M. and Ahmad, B. (2022) Nano-Porous Bimetallic Organic Frameworks (Fe/Co)-BDC, a Breathing MOF for Rapid and Capacitive Removal of Cr-Oxyanions from Water. Journal of Water Process Engineering, 46, 102537. https://doi.org/10.1016/j.jwpe.2021.102537
[12]
Zhang, Y., Liu, Q., Ma, W., Liu, H.X., Zhu, J.W., Wang, L.K., Pei, H.C., Liu, Q.Z. and Yao, J.S. (2022) Insight into the Synergistic Adsorption-Reduction Character of Chromium(VI) onto Poly(Pyrogallol-Tetraethylene Pentamine) Microsphere in Synthetic Wastewater. Journal of Colloid and Interface Science, 609, 825-837. https://doi.org/10.1016/j.jcis.2021.11.086
