Evaluation of biodegradation process: Comparative study between suspended and hybrid microorganism growth system in sequencing batch reactor (SBR) for removal of phenol

Yusoff, Nik Athirah; Ong, Soon‐An; Ho, Li-Ngee; Wong, Yee‐Shian; Saad, Farah Naemah Mohd; Khalik, WanFadhilah; Lee, Sin-Li

doi:10.1016/j.bej.2016.07.018

Cited by 34 publications

(19 citation statements)

References 34 publications

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“…However, system showed a good performance for removal of organic matters compared to conventional SBR system even at 30 g NaCl/L. Yusoff et al (2016) [16] used two identical SBR system, one with attached growth named hybrid granular SBR, and the other was a conventional SBR named suspended granular SBR system. He observed 18% higher efficiency for COD removal in hybrid system.…”

Section: Resultsmentioning

confidence: 99%

“…Hybrid Sequencing Batch Reactor (HSBR) is an enhanced system of conventional SBR, in which two types of bacterial growth, suspended and attached growth (biofilm) are occurred simultaneously in a single bioreactor (Mielcarek et al, 2015) [14]. The HSBR system has many advantages over the conventional SBR method, including the ability to grow different types of bacteria, better resistance to inhibitory effects such as salinity, greater biomass retention and lower reactor volumes (Wang et al, 2016 [15]; Yusoff et al, 2016 [16]). Biomass carriers, or media, act as a bedding for attached growth.…”

Section: Introductionmentioning

confidence: 99%

“…She et al (2016) [18] examined the effects of different salinity on nitrogen removal efficiencies in HSBR system and indicated that hybrid system had a 10% more efficiency at 9.8 g NaCl/L than conventional SBR system. Yusoff et al (2016) [16] evaluated the performance of two SBR systems: one with suspended growth and the other with hybrid growth. They observed 18% better COD removal efficiency of hybrid growth compared to the other system.…”

Section: Introductionmentioning

confidence: 99%

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Performance evaluation of a hybrid sequencing batch reactor under saline and hyper saline conditions

Ghazani

Taghdisian

2019

J Biol Eng

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Significant rise in concentration of saline wastewater entering the treatment plants has been resulting in many problems in the biological treatment processes. On the other hand, the specific conditions of physicochemical treatment methods for saline and hyper saline wastewater have limited their application on a large-scale. Over the past few decades, Sequencing Batch Reactor (SBR) process has been widely used as an efficient, well-designed and practical approach for treatment of domestic and industrial wastewater due to its cost-effectiveness and simplicity. SBR Performance can enhance by providing simultaneous suspended and attached growth of microorganisms which act as a hybrid growth. In this study, a lab-scale Hybrid Sequencing Batch Reactor (HSBR) with 6.4 l working volume was used to examine the effect of salinity (NaCl), increased from 0 to 6.7% (g NaCl/ L wastewater), on the biological treatment. Therefore, COD, MLSS, MLVSS and SVI parameters have been measured over a period of 7 months of operation. The operational parameters namely pH, dissolved oxygen (DO) and temperature were 7.5–8.5, 1.5–6.8 mg /L and 20–25 °C respectively during whole experiment. Influent COD of synthetic wastewater was maintained at 650 ± 25 mg/L. The HSBR Cycle time including, influent feeding, React, Settling and effluent discharge were 1/20/1/1 h respectively. Results indicated that by increasing salt concentration from 0 to 67.7 g NaCl/L, the COD removal efficiency reduced from 94.22 to 53.69%. Moreover, as the NaCl concentration increased, MLSS rose up to 69%, while MLVSS almost stayed constant and SVI dropped by 83%. The results indicated that the simultaneous use of suspended and attached growth of microorganisms and gradual increasing of salt content of wastewater could lead to greater biomass concentration and ultimately improvement in the degradation of organic matter. Besides, settling performance and its velocity were noticeably improved by increasing salinity.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance evaluation of a hybrid sequencing batch reactor under saline and hyper saline conditions

Ghazani

Taghdisian

2019

J Biol Eng

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“…Biological treatments using activated sludge in sequencing batch reactors (SBRs) are widely used to detoxify industrial wastewater on the grounds of their feeding flexibility, versatility and cost‐effectiveness relative to other biological technologies. SBRs use microorganisms tolerant of toxic compounds and environments (oxic, anoxic), which facilitates nutrient removal . Also, they promote adaptation of microbial populations to specific pollutants.…”

Section: Introductionmentioning

confidence: 99%

“…SBRs use microorganisms tolerant of toxic compounds and environments (oxic, anoxic), which facilitates nutrient removal. [59][60][61] Also, they promote adaptation of microbial populations to specific pollutants. SBRs have proved effective for degrading pollutants such as phenols and chlorophenols, 61 herbicides, 62 coke wastewater 63 and pharmaceutical wastewater.…”

Section: Introductionmentioning

confidence: 99%

Biological oxidation of choline‐based ionic liquids in sequencing batch reactors

Mena

Díaz

Rodrı́guez

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Ionic liquids (ILs) are salts consisting of an organic cation and an organic or inorganic anion that are potential use for organic synthesis, biomass conversion, gas absorption, polymerization, metal extraction and lubrication. We examined the biodegradability of choline chloride (CholineCl), choline acetate (CholineAc) and choline bis(trifluoromethylsulfonyl)imide (CholineNTf2) in a sequencing batch reactor (SBR) to assess the influence of the IL anion. RESULTS Following acclimation, activated sludge exhibited good activity, and high COD (80–90%) and TOC removal (75–85%) with initial concentrations of CholineCl and CholineAc over the range 0.25–15 mmol L–1. However, increased concentrations of CholineNTf2 in the reactor feed had an inhibitory effect on the sludge. An analysis of the reaction effluent revealed the presence of the main intermediates of choline degradation: ethanol, and methyl‐, dimethyl‐ and trimethylamine. The initial and final microbial communities of the sludge were characterized by pyrosequencing analysis, and the latter was found to consist mainly of Alfa‐, Beta‐ and Gamma‐proteobacteria. CONCLUSION Choline‐based ionic liquids can be efficiently removed in SBRs. Complete choline degradation (0.25–15 mmol L–1) was accomplished at a variable depletion rate depending on the particular IL anion (chloride, acetate or NTf2). © 2019 Society of Chemical Industry

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Upgrading sequencing batch reactor using attached biofilm

Abdelaziz¹,

Fouad

Mossad

2021

Water Environment Research

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A conventional sequencing batch reactor (SBR) was upgraded using fixed biofilm carriers with a specific surface area around 18 m 2 m −3 . The upgraded SBR was investigated to remove phenol from high strength wastewater operated under various operational conditions. The operational conditions used were variable volume exchange ratio (VER) up to 75%, hydraulic retention time (HRT) from (10.7-21.3 hr), aeration time (from 2 to 8 hr), and initial phenol concentration up to 600 mg L −1 . It was found that the upgraded SBR increased the removal efficiencies of biological oxygen demand (BOD 5 ), chemical oxygen demand (COD), and total suspended solids (TSS) by about 10% using high strength wastewater without phenol compared to SBR. Furthermore, the removal rate of phenol for the upgraded SBR was higher than conventional SBR by about 18% at 600 mg L − of initial phenol concentration under the same operational conditions. Compared to the conventional SBR, the upgraded version reduced the aeration step by 25% and achieved higher removal efficiency of phenol. Moreover, it reduced the excess sludge by about 23% and enhanced its properties by lowering the sludge volume index (SVI) by about 33%. © 2021 Water Environment Federation • Practitioner points• Upgrading conventional SBR by adding biofilm carriers is necessary for wastewater treatment with high strength wastewater. • The upgraded SBR has a higher resistance toward phenol compound due to the presence of the attached biofilm. • The upgraded SBR enhances sludge settling properties, decreases the amount of excess sludge, and also reduces the start-up period. • The number of cycles per day by upgraded SBR was more than the conventional SBR by 15%. • The upgraded SBR is an effective system and has good operational stability.

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Evaluation of biodegradation process: Comparative study between suspended and hybrid microorganism growth system in sequencing batch reactor (SBR) for removal of phenol

Cited by 34 publications

References 34 publications

Performance evaluation of a hybrid sequencing batch reactor under saline and hyper saline conditions

Performance evaluation of a hybrid sequencing batch reactor under saline and hyper saline conditions

Biological oxidation of choline‐based ionic liquids in sequencing batch reactors

Upgrading sequencing batch reactor using attached biofilm

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