جستجوی مقالات مرتبط با کلیدواژه "electrocoagulation process" در نشریات گروه "پزشکی"

Amoxicillin antibiotic is one of the antibiotics which is used in medicine and veterinary medicine to treat bacterial infectious diseases. In this study, a special electrochemical cell design was used as it could integrate the process units and the operation units to reduce COD and amoxicillin antibiotic residues from the wastewater of Alimoradian Hospital. Also, to optimize the operational parameters, the central composite design of response surface methodology (RSM) was used.

This experimental study was conducted in two parts. In the first stage, synthetic wastewater was prepared from Amoxicillin antibiotics to investigate the effect of various parameters such as reaction time, initial antibiotic concentration, current density, and pH on the efficiency of the method. In the second stage, the efficiency of the method in removing the antibiotic and reducing COD from the actual wastewater of Alimoradian hospital was evaluated.

Using the RSM, the optimal conditions of the laboratory findings were determined as follows: reaction time = 30 min, pH = 7.5, current density = 2.31 mA/cm2, and initial concentration of amoxicillin = 54.66 mg/L. Under these conditions, the removal amount of amoxicillin was 90.56%. The results also showed that under optimal conditions, the removal rate of COD and TOC from synthetic wastewater is 65.5% and 44.5%, respectively, and in the effluent of Alimoradian hospital is 47.7% and 38%, respectively. The reason for this difference is probably due to the presence of some resistant compounds in the real wastewater.

This experimental study showed that the combined electrocoagulation process can be a more effective method in removing the amoxicillin antibiotic and COD from aqueous solutions and hospital wastewater.

Anaerobic baffled reactor (ABR) is one of the low cost wastewater treatment systems compared to the aerobic method. Hoverer it should be studied and developed to overcome its limitations such as insufficient nutrient removal. The aim of this study was to evaluate the efficiency of the 5 sectional ABR pilot and improve it with integrated electric coagulation process for municipal wastewater treatment.

This study was conducted at Khoy wastewater treatment plant. The ABR was operated for 270 days with hydraulic retention time (HRT) 36-24-18-12h and the integrated reactor was operated for 40 days with duration of 18 hours. The reactors were fed in line from the incoming wastewater to the treatment plant. From the input and output of the system, 245-hour combined sampling was performed 225 times and the parameters COD, BOD, TSS, TKN, and TP were measured.

The reactor startup took about 105 days. The ABR reached to 79 - 91%, 9-20%, 19-30% and 89-94% COD, TKN, PO4 and TSS removal efficiencies respectively at HRT36 and 12 h. The ABR meted effluent disposal standards of TSS in all conditions and those of COD, TP and BOD at optimum HRT 36h. The integrated ABR meted these and NO3, SO4 standards at HRT 18 h in current density of 0.1mA/cm2 by aluminum electrodes.

The ABR is suitable for municipal wastewater treatment, but it has limitations such as high HRT and failure to meet nitrogen effluent discharge standard. By integrating the EP into the ABR while reducing HRT, its efficiency increased up to twice that of ABR with the same time. Therefore, integrated electrical coagulation can be used to improve ABR efficiency.

Cyanide ion is one of the most dangerous compounds for the man. Electrocoagulation process with high efficiency to removing pollutants, than researchers considered a effective process. The aim of this study was to determine the efficiency of electrocoagulation process by aluminum electrodes in cyanide removal from synthetic wastewater using magnesium oxide as a coagulantaid. Mehods: In this study, a reactor with four aluminum electrodes with dimensions 200 × 20 × 2 mm use of 1 Liter of useful volume of electricity generating device for the removal of cyanide was used. Effect of parameters such as pH(3-9), voltage (10-30 V), the initial concentration of cyanide(50-500 ppm) and different concentrations of magnesium oxide particles (0.1 to 1 mg l) as coagulant aid in the process were investigated. The results show that the efficiency of EC process at pH 5, voltage of 30 V and an initial concentration of cyanide, 50 mg/lit in 45 minutes, was 80 percent. process will Efficiency by adding coagulant aid. In optimal amounts of coagulant aid (0.1 mg/lit) in electrocoagulation process on the removal of the cyanide 90% was achieved. Electrocoagulation process is suitable process for the removal of cyanide. Also, Magnesium Oxide as a coagulant aid in this process was good and increase process efficiency.