The effect of key factors in aerobic bioreactor and optimization by different strategies

Zeynali, Vahid; Masoudi, Seyed Mohammad Ali; Sargolzaei, Javad; Dehkordi, Fatemeh Sabeti

doi:10.1016/j.eti.2020.100724

Cited by 4 publications

(7 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A graphical presentation with minimum, maximum, and optimum values is plotted in Figure 5A Cycle Time [B] C/N ratio [C] C/P ratio. Earlier studies reported in Tables S1-S3 show that C, N and P removal efficiency was realized over a wide range of cycle times (6.5-41 h), C/N ratio (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20), and C/P ratio (20-250). From Figure 5, it is clear that the best operating range for cycle time is 3-12 h, C/N is 5-20 and C/P is 25-100.…”

Section: Comparison Of Present Study With Literaturementioning

confidence: 87%

“…The process performance in terms of total COD removal under different conditions is documented in this study. Glucose, solely used as a carbon source as glucose is considered to be a readily biologically degradable organic matter source as compared to starch, which is a complex macromolecule, the former can be consumed by biomass in a short span of time [15]. In the present system, excellent performance in organic carbon removal (COD) was observed.…”

Section: Cod Removal In Sbrmentioning

confidence: 87%

“…Gholami et al, 2020 [35] reported that the bioreactor produced SVI 30 values between 60.5 and 92.5 mL/g due to the predominance of HRT on SVI 30 . Furthermore, other studies have found that the SVI 30 typically ranges between 50 and 108 mg/L [15,49,50]. Since cycle time and SVI have an inverse relationship, the SVI declined as the cycle time increased from 12 to 24 h, and then increased to 36 h [23].…”

Section: Sludge Volume Indexmentioning

confidence: 94%

“…In the settle stage of SBR, it is the best parameter for observing sludge settling property and sludge bulking. In the case of biological treatment operations, low SVI values due to high settling velocity are considered much more favorable [15]. SVI for the activated sludge process typically has values under 100 mL/g [23], while values over 150 mL/g are indicative of sludge thickening [48].…”

Section: Sludge Volume Indexmentioning

confidence: 99%

“…Biological wastewater treatment, on the other hand, has attracted a lot of attention in recent years due to its environmental sustainability, high efficiency, and cost effectiveness. [15]. Sequencing Batch Reactor (SBR) employing simultaneous nitrification and denitrification has proven its capabilities for biological nutrient removal (BNR), hence safeguarding water from eutrophication [16].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Simultaneous Removal of Organic Matter and Nutrients from High Strength Organic Wastewater Using Sequencing Batch Reactor (SBR)

Sharma

Bhatti

2022

Processes

View full text Add to dashboard Cite

Industrial wastewater discharges often contain high levels of organic matter and nutrients, which can lead to eutrophication and constitute a serious hazard to receiving waters and aquatic life. The purpose of this study was to examine the efficacy of using a sequencing batch reactor (SBR) to treat high-strength organic wastewater for the removal of both chemical oxygen demand (COD) and nutrients (nitrogen and phosphorus). At a constant COD concentration of approximately 1000 mg/L, the effects of cycle time (3 and 9 h) and various C:N:P ratios (100:5:2, 100:5:1, 100:10:1, and 100:10:2) were investigated using four identical SBRs (R1, R2, R3, and R4). According to experimental data, a significant high removal, i.e., 90%, 98.5%, and 84.8%, was observed for COD, NH3-N, and PO43−-P, respectively, when C:N:P was 100:5:1, at a cycle time of 3 h. Additionally, when cycle time was increased to 9 h, the highest levels of COD removal (95.7%), NH3-N removal (99.6%), and PO43−-P removal (90.31%) were accomplished. Also, in order to comprehend the primary impacts and interactions among the various process variables, the data was statistically examined using analysis of variance (ANOVA) at a 95% confidence level, which revealed that the interaction of cycle time and C/N ratio, cycle time and C/P ratio is significant for COD and NH3-N removal. However, the same interaction was found to be insignificant for PO43−-P removal. Sludge volume index (SVI30 and SVI10) and sludge settleability were studied, and the best settling was found in R3 with SVI30 of 55 mL/g after 9 h. Further evidence that flocs were present in reactors came from an average ratio of SVI30/SVI10 = 0.70 after 9 h and 0.60 after 3 h.

show abstract