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Performance of electrical stimulated anaerobic baffled reactor for removal of typical pollutants from low-strength municipal
wastewater at low temperatures
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Marziye Moradgholi    , Mohamadreza Massoudinejad , Ehsan Aghayani , Ahmadreza Yazdanbakhsh |
| corresponding author: Workplace Health Promotion Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran , yazdanbakhsh@sbmu.ac.ir |
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Abstract: (4952 Views) |
Background: Although anaerobic system has been successfully used for treating the strong industrial wastewater, its efficiency for low-strength wastewater as municipal wastewater is not satisfying. This study aimed to enhance the capability of an anaerobic baffled reactor (ABR) for treating municipal wastewater.
Methods: A 7-L ABR with 5 compartments was operated for a 287-day period fed with primary effluent from a wastewater treatment plant at 17 to 19°C. The study was conducted in 2 phases. In the first phase, the performance of ABR and in the second phase, the performance of ESABR (ABR integrated with an electrochemical system) were investigated.
Results: The results of ABR operation indicated that at hydraulic retention time (HRT) =24 hours, the average removal efficiency of biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), total Kjeldahl nitrogen (TKN), total phosphorous (TP), and log reduction
value (LRV) of coliforms were obtained to be 71%, 75%, 79%, 23%, 30.3%, and 5.8 Log, respectively. In this phase, when the HRT was decreased from 24 to 18 hours and from 18 to 14 hours, the removal efficiency of all parameters by the ABR was decreased. After the shift of ABR operation to ESABR, at HRT=24 hours and current density of 0.78 mA/cm2, the performance of the reactor was enhanced, so that the removal efficiency of BOD, COD, TSS, TKN, TP, and LRV of coliforms were achieved 16.8%, 15%, 4%, 10.7%, 49%, and 1 Log, which was greater than those obtained by ABR.
Conclusion: According to the results, this technology (SEABR) is suitable for treating the low-strength municipal wastewater. |
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Keywords: Wastewater, Anaerobic baffled reactor, Electrical stimulated, Treatment
eprint link: http://eprints.kmu.ac.ir/id/eprint/31294
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Full-Text [PDF 707 kb]
(1478 Downloads)
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Type of Study: Original Article |
Subject:
General
Received: 2019/07/6 | Accepted: 2019/07/6 | Published: 2019/07/6
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