Monitoring and control of biological nutrient removal in a Sequencing Batch Reactor

Akın, Beril Salman; Uğurlu, Ayşenur

doi:10.1016/j.procbio.2005.01.001

Cited by 108 publications

(58 citation statements)

References 16 publications

(19 reference statements)

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“…The samples were carried to the laboratory in storage boxes, which comply with the Standard Methods [15] and appropriate conservation criteria (cooler storage boxes, acidification, etc.) [16].…”

Section: Sample Collectionmentioning

confidence: 99%

Contaminant Properties of Hospital Clinical Laboratory Wastewater: A Physiochemical and Microbiological Assessment

Akın¹

2016

JEP

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Hospital laboratory wastewater has been considered to significantly change the degree of contamination of especially the hospital wastewater. The present study investigated the hospital clinical laboratory wastewater and the pollution loads were assessed for pathogens, heavy metals, and organic materials. Composite samples were collected from clinical laboratory wastewater of a 350-bed hospital for a six-month period. Analyses for pH, TSS (Total Suspended Solid), BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), PO4-P, and Cl as well as heavy metals (Cd, Pb, Zn, Cu, Cr, Co, Ni, Al, and Mn) were made in order to physiochemical properties of the samples. Bacterial isolation (Pseudomonas aeruginosa, Escherichia coli, Acinetobaumanii, CNS-CoagulaseNegative Staphylococcus) and antigen-antibody analyses were conducted in order to find the microbiological pollution load of the wastewater. As a result of the study it was found that the hospital clinical laboratory wastewater was alkaline and COD/BOD ratio reached to a range of 10 -12 in the wastewater. It was concluded that although the heavy metal concentrations were within the sewage discharge limits the said levels could pose health risk. It was also found that the wastewater entailed health risk due to pathogens.

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Section: Sample Collectionmentioning

confidence: 99%

Contaminant Properties of Hospital Clinical Laboratory Wastewater: A Physiochemical and Microbiological Assessment

Akın¹

2016

JEP

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“…This behavior evidenced that denitrification had occurred. Besides, Akin and Ugurlu [10] indicated that the mobility of the N-NO x -depends on the ORP during the anoxic phase, therefore, the breaking point in the ORP profile ("nitrate knee") corresponded to the lowest concentration of N-NO x -(14.5 mg·L -1 ). At the same time, the end of the denitrification process was also related with an inflexion in pH profile (Figure 6(b)).…”

Section: Ph Orp and Do Profiles And Their Relation With Biological Nmentioning

confidence: 99%

“…These can be used to identify specific control points during the SBR cycle. Therefore, the inflexion in pH, DO and ORP profiles can be used as on-line monitoring and control parameters for biological nutrient removal processes [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen and cod removal from tannery wastewater using biological and physicochemical treatments

Pire-Sierra

Cegarra-Badell

Carrasquero

et al. 2016

Rev. Fac. Ing. Univ. Antioquia

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“…In the SBR system, external clarifiers and flow equalization tanks may not be essential and thus, offer low cost of facilities and operation management than those of conventional systems like activated sludge process [3]. SBR systems, applied to nitrification and denitrification, offer various advantages including: minimal space requirements, ease of management and possibility of modifications during trial phases through on-line control of the treatment strategy [4]. The improved regulations over nutrient discharge limits to natural water systems drive for the need in design improvements in SBR system to achieve thorough nitrification, denitrification along with COD removal and phosphate removal [5].…”

Section: Introductionmentioning

confidence: 99%

“…Tsuneda et al proposed an anaerobic/aerobic/anoxic (AOA) process using a SBR for simultaneous phosphorus and nitrogen removal from wastewater with high efficiencies [3]. The objective of study conducted by Akin and Ugurlu was to establish control strategies for biological phosphorus and nitrogen removal using oxidation reduction potential (ORP), dissolved oxygen (DO) and pH profiles [4]. Kargi and Uygur studied nutrient removal from synthetic wastewater by sequencing batch operation at different SRTs varied from 5 and 30 days at six different levels with a overall cycle time of 10.5 hours obtained high CNP (carbon, nitrogen and phosphate) removal [6].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Effective Operational Cycle Time and Bioprocess Parameters in a Sequential Batch Reactor for Efficient Organic and Nutrient Removal from Domestic Sewage

Magdum

Varigala

Patil

et al. 2015

IJEE

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A B S T R A C TAnaerobic, anoxic and aerobic environment can be simulated in the single stage sequential batch reactor (SBR) . Various design conditions viz., combinations of different phase time and different cycle time, hydraulic residence time (HRT), substrate loading rate, sludge age (SRT) and aeration time were analyzed for optimum biological treatment. The pilot runs were evaluated with the design conditions of food/microbe ratio (F/M) 0.2 per day and MLSS of 4950 mg/L. For the given design conditions 4, 5 and 6 hours cycle lengths were analyzed for their efficient performance with 30-33% of decant volume for sewage containing C:N:P of 100:8:2. Studies on 4 hours cycle resulted in the maximum overall organic and nutrient removal efficiency at SRT of 26 days and HRT of 12 hours. Efficient sequencing of reactions with respect to the simulated biological conditions in the pilot plant studies resulted in better oxygen recovery and low power consumption. Also, the enforced biological selector phase condition resulted in high microbial reaction rates for organic and nutrient removal. The removal efficiencies with 4 hours cycle time of COD, nitrogen (NH4-N) and phosphate (PO4-P) were 90, 92 and 78%, respectively. This study offers a potential option of low HRT nutrient removal SBR process.

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Monitoring and control of biological nutrient removal in a Sequencing Batch Reactor

Cited by 108 publications

References 16 publications

Contaminant Properties of Hospital Clinical Laboratory Wastewater: A Physiochemical and Microbiological Assessment

Contaminant Properties of Hospital Clinical Laboratory Wastewater: A Physiochemical and Microbiological Assessment

Nitrogen and cod removal from tannery wastewater using biological and physicochemical treatments

Evaluation of Effective Operational Cycle Time and Bioprocess Parameters in a Sequential Batch Reactor for Efficient Organic and Nutrient Removal from Domestic Sewage

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