Foaming control by automatic carbon source adjustment using an ORP profile in sequencing batch reactors for enhanced nitrogen removal in swine wastewater treatment

Chen, Meixue; Kim, Ju-Hyun; Yang, Min; Wang, Yizhong; Kishida, Naohiro; Kawamura, Kiyoshi; Sudo, Ryuichi

doi:10.1007/s00449-009-0332-y

Cited by 9 publications

(3 citation statements)

References 18 publications

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“…In Phase 1, a real-time control strategy was established based on the variation of pH and ORP to optimize the duration of aeration and stirring (Figure 2a). The ORP and pH have been demonstrated to be practical and useful parameters for process monitoring and real-time control of activated sludge processes because the control costs and maintenance requirements of these parameters are low, especially for an intermittent operation system [12][13][14]. In this study, the 'ammonia valley' on the pH profile and the 'nitrate knee' on the ORP profile were used to determine the length of aeration and stirring respectively.…”

Section: Resultsmentioning

confidence: 99%

Applying real-time control for achieving nitrogen removal via nitrite in a lab-scale CAST system

Wang

Wei

et al. 2012

Environmental Technology

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In this study, a bench-scale Cyclic Activated Sludge Technology (CAST) reactor (72?L), fed with domestic sewage, was operated in alternating anoxi-aerobic operation mode to investigate the feasibility of achieving short-cut nitrification and denitrification with a real-time control strategy. An online system for controlling the length of the aeration and stirring phases was implemented, based on pH and oxidation-reduction potential signals, to switch between aerobic and anoxic sequences. Results show that the real-time control strategy was successful in achieving a stable nitrogen removal performance. Furthermore, short-cut nitrification can be achieved by controlling aeration length under the modified real-time control strategy. Gradually reducing the energy supply for nitrite-oxidizing bacteria caused the limitation of their growth and, finally, their elimination. When short-cut nitrification was obtained, the nitrite pathway became the primary way for nitrogen removal, and aeration duration was reduced by 28.4%.

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Section: Resultsmentioning

confidence: 99%

Applying real-time control for achieving nitrogen removal via nitrite in a lab-scale CAST system

Wang

Wei

et al. 2012

Environmental Technology

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“…One of the most popular reactors in the implementation of biological degradation with swine wastewater is SBR [ 36 , 37 , 38 ]. In this study, SBR was used to treat the filtrate after the bio–coagulation dewatering process, with the concentrations of COD and NH 3 –N being constantly monitored.…”

Section: Resultsmentioning

confidence: 99%

Feasibility of Bio–Coagulation Dewatering Followed by Bio–Oxidation Process for Treating Swine Wastewater

Zhang

Han

Zhou

et al. 2023

IJERPH

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The unsatisfactory performance of the conventional swine wastewater treatment is drawing increasing attention due to the large amount of refractory chemical oxygen demand (COD), nitrogen, and phosphorus attached to the suspended solids (SS). In this study, for the first time, a novel process based on bio–coagulation dewatering followed by a bio–oxidation (BDBO) system was developed to treat swine wastewater containing high–strength SS, COD, TN, and TP. Firstly, after the bio–coagulation process, the removal efficiencies of SS, COD, NH3–N, and TP reached as high as 99.94%, 98.09%, 61.19%, and 99.92%, respectively. Secondly, the filtrate of the bio–coagulation dewatering process was introduced into the subsequent bio–oxidation process, in which the residual COD and NH3–N were further biodegraded in a sequence batch reactor. In addition, the dewatering performance of the concentrated swine slurry was substantially improved, with the specific resistance to filtration decreasing from 17.0 × 1012 to 0.3 × 1012 m/kg. Moreover, the concentrated swine slurry was pressed and filtered into a semi–dry cake after pilot–scale bio–coagulation dewatering treatment. Finally, the concentrations of COD and NH3–N in the effluent after the BDBO process, ranging between 150–170 mg/L and 75–90 mg/L, met the relevant discharge standard. Compared to traditional treatments, the BDBO system has excellent large–scale potential for improving the treatment efficiency, shortening the operation period, and reducing the processing costs, and is emerging as a cost–effective alternative for the treatment of wastewater containing high concentrations of SS, COD, TN, and TP.

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“…Considering the high COD and ammonia concentrations and the relatively low C/N ratio of swine wastewater, the SBNR process is suitable to apply for simultaneous COD and TN removal. Multiple reactor configurations were investigated for efficient swine wastewater treatment, such as a sequencing batch reactor (SBR) [ 10 ], an aerobic granular sludge batch reactor (GSBR) [ 11 ], an integrated fixed-biofilm activated sludge sequencing batch reactor (IFAS-SBR) [ 12 ], and an up-flow anaerobic sludge bed (UASB) [ 13 ]. The SBR was considered and suggested as the best approach to treat SW for its even mix of good mass transfer and simple operation [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

The Performance and Spatial Distribution of Membrane Fouling in a Sequencing Batch Ceramic Membrane Bioreactor: A Pilot Study for Swine Wastewater Treatment

Yue,

Chen,

Sui

et al. 2024

Membranes

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The extensive application of ceramic membranes in wastewater treatment draws increasing attention due to their ultra-long service life. A cost-effective treatment for high-strength swine wastewater is an urgent and current need that is a worldwide challenge. A pilot-scale sequencing batch flat-sheet ceramic membrane bioreactor (ScMBR) coupled with a short-cut biological nitrogen removal (SBNR) process was developed to treat high-strength swine wastewater. The ScMBR achieved stable and excellent removal of COD (95.3%), NH4+-N (98.3%), and TN (92.7%), though temperature went down from 20 °C, to 15 °C, to 10 °C stepwise along three operational phases. The COD and NH4+-N concentrations in the effluent met with the discharge standards (GB18596-2001). Microbial community diversity was high, and the genera Pseudomonas and Comamonas were dominant in denitritation, and Nitrosomonas was dominant in nitritation. Ceramic membrane modules of this pilot-scale reactor were separated into six layers (A, B, C, D, E, F) from top to bottom. The total filtration resistance of both the top and bottom membrane modules was relatively low, and the resistance of the middle ones was high. These results indicate that the spatial distribution of the membrane fouling degree was different, related to different aeration scour intensities demonstrated by computational fluid dynamics (CFD). The results prove that the membrane fouling mechanism can be attributed to the cake layer formation of the middle modules and pore blocking of the top and bottom modules, which mainly consist of protein and carbohydrates. Therefore, different cleaning measures should be adopted for membrane modules in different positions. In this study, the efficient treatment of swine wastewater shows that the ScMBR system could be applied to high-strength wastewater. Furthermore, the spatial distribution characteristics of membrane fouling contribute to cleaning strategy formulation for further full-scale MBR applications.

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Foaming control by automatic carbon source adjustment using an ORP profile in sequencing batch reactors for enhanced nitrogen removal in swine wastewater treatment

Cited by 9 publications

References 18 publications

Applying real-time control for achieving nitrogen removal via nitrite in a lab-scale CAST system

Applying real-time control for achieving nitrogen removal via nitrite in a lab-scale CAST system

Feasibility of Bio–Coagulation Dewatering Followed by Bio–Oxidation Process for Treating Swine Wastewater

The Performance and Spatial Distribution of Membrane Fouling in a Sequencing Batch Ceramic Membrane Bioreactor: A Pilot Study for Swine Wastewater Treatment

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