List of Articles stabilization pond

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  1 - A Survey on Efficiency of Natural Wastewater Treatment Systems and Activated Sludge for Municipal Wastewater Treatment
  Reza Shokoohi Abdollah Dargahi Amir Karami
  10.30495/jest.2018.15742.2426
  Background and Objective: Consumption of dissolved oxygen by organic substances in water resources result in undesirable environment for living organisms. The aim of this study was to evaluate the efficiency of natural wastewater treatment systems and activated sludge f More

  Background and Objective: Consumption of dissolved oxygen by organic substances in water resources result in undesirable environment for living organisms. The aim of this study was to evaluate the efficiency of natural wastewater treatment systems and activated sludge for municipal wastewater treatment.Methods: This one year-cross-sectional study was conducted on wastewater treatment plants in Kermanshah province. During the study, sampling of raw sewage and effluent of treatment plant was carried out and the efficiency of treatment plant was evaluated by measuring TSS, BOD5 and COD. All the sampling and testing procedures were adopted from the standard method.Findings: The results showed that the annual average of BOD5 in effluent for Wetland, stabilization pond, extended aeration and conventional activated sludge was 55, 25, 21 and 23 mg/l respectively. Also the annual average was 143, 43, 40 and 40 mg/lfor COD, and 47, 101, 40 and 33 mg/l for TSS, respectively. For COD removal the conventional activated sludge (86.97%) and Wetland (61.6%) were the most efficient and least efficient systems. For BOD5 removal the stabilization pond (85.18%) and Wetland (72.01%) were the most efficient and least efficient systems. The BOD5 / COD ratio in influent were respectively 0.56, 0.62, 0.59 and 0.55 in these systems.Discussion and Conclusion: In all of the mentioned wastewater treatment systems, the effluent parameters comply with the Iran environmental protection agency standards and it can be reused or discharged to water bodies. Also it can be concluded that, for above-mentioned parameters the removal efficiency of natural systems was more than activated sludge. Manuscript profile
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  2 - Effect of retention time and temperature on the efficiency stabilization ponds in treatment of petroleum wastewater
  Abdollah Dargahi Meghdad Pirsaheb Mohamadtaghi Savadpoor Mortaza Alighadri Mehrdad Farookhi
  Biological treatment method is one of the best and most cost-effective methods for the treatment ofcontaminated wastewaters. The purpose of this study was to evaluate the effect of retention time andtemperature on the efficiency of stabilization ponds in removing organi More

  Biological treatment method is one of the best and most cost-effective methods for the treatment ofcontaminated wastewaters. The purpose of this study was to evaluate the effect of retention time andtemperature on the efficiency of stabilization ponds in removing organic compounds, N-NH3 and PO4from oil refinery wastewater.Materials and Methods:The method used in the present study was of an experimental type, in which an anaerobic stabilizationpond with dimensions of 1 × 0.2× 1 m and a laboratory scale facultative pond with the capacity of 400L were designed, set up and operated, using fiberglass sheet with a thickness of 6 mm. In this study,the hydraulic retention time of 2 and 5 days for anaerobic pond and 5 and 10 days for facultative pondwere set in both hot and cold temperatures. Then, N-NH3 and PO4 parameters were measured at thewavelengths of 425 and 690 nm respectively. Also, TCOD, SCOD, TBOD, SBOD and pH of sampleswere measured according to the standard methods for water and wastewater tests.Results and Discussion:These results indicated that the retention time and temperature had a significant effect on theefficiency of stabilization ponds, so that the efficiency of anaerobic and facultative stabilization pondsin the removal of organic compounds was significantly increased with the increase of retention timeand temperature (p<0.05). The maximum removal efficiency for COD, BOD, N-NH3 and PO4 wasobtained to be 93.31, 93.66, 88.15 and 73.17 % respectively (at the retention time of 5 days ofanaerobic and 10 days of facultative and hot temperature), and the minimum removal efficiency for1-Department of Environmental Health Engineering, School of Khalkhal Medical, Ardabil University ofMedical Sciences, Ardabil, Iran2-Department of Environmental Health Engineering, School of Public Health, Kermanshah University ofMedical Sciences, Kermanshah, Iran3- Department of Nursing, School of Khalkhal Medical, Ardabil University of Medical Sciences, Ardabil, Iran4-Department of Environmental Health Engineering, School of Public Health, Ardabil University of MedicalSciences, Ardabil, Iran5- Department of Environmental Health Engineering, School of Public Health, Alborz University of MedicalSciences, Karaj, IranJ.Env.Sci,TechJ.Env. Sci. Tech., Vol 16, No.2, Summer 2014153the same parameters was obtained to be 41.47, 40.55, 34.26 and 22.46% respectively (at the retentiontime of 2 days of anaerobic and 5 days of facultative and hot temperature). Also, the single algaavailable in the facultative pond was formidiom and it was able to grow in high concentrations ofsulfur.The results of this study showed that the pilot-scale stabilization ponds in hot temperature, if operatedproprly, have the ability to remove organic compounds with a high efficiency. However, in coldweather, its efficiency is low but in acceptable level. Manuscript profile
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  3 - Study of organic matter of loading on the application of wastewater treatment of water refinery of Sewerage of Abadan industrial estate
  Iran Baraee Mahdi Farzadkia Nematollah Jafarzadeh
  The stabilization ponds are more effective systems for treating of the wastewater whit high organic and hydraulic loading shocks. Therefore, those are most popular methods for municipal and many of industrial wastewater treatment. Module 1 of phase 1 has been done in Ab More

  The stabilization ponds are more effective systems for treating of the wastewater whit high organic and hydraulic loading shocks. Therefore, those are most popular methods for municipal and many of industrial wastewater treatment. Module 1 of phase 1 has been done in Abadan wastewater treatment plant. The main objective of this study was investigation of the organic matter of loading on the application of wastewater treatment of Abadan industrial estate. In this study, The  efficiency  of  Abadan  wastewater treatment  plant  was  studied  over ten months  from  February 2004 to December 2005 . The general  conditions  and  operation  of  the  plant  were  considered  and  wastewater  treatment  indexes  such  as pH  , COD , BOD5 , TSS , Total   coli form  and  fecal  coli form and helminthes ova in influent  and  effluent and loading of organic matter level  were  determined. The maximum removal efficiency of pollutants was in July. The  average  amounts  of COD , BOD5 , TSS  , total  and  fecal  coli form and helminthes ova in effluent in July were 805  mg/l ,440 mg/l , 30mg/l,9/2×105 MPN/100ml  6/1×105MPN/100ml ,22 ova/l respectively. so, maximum and minimum volume loading level in the anaerobic ponds 694.6 &384.1 g BOD5/m3.d and maximum and minimum surface loading level in the facultative ponds 554 & 272.06 kg BOD5/ha. d were determined. These results showed that the amounts of these parameters (exception of the TSS) had significant difference with the standard limits recommended by Iran Department of Environment (DOE) for irrigation or discharged to surface water and recycling water for agricultural re-use. In this section, problems and proposals have been presented. For sanitary disposal and reuse of this effluent the optimization of existing system must be noted.                                                             Manuscript profile