Improved biological phosphorus removal performance driven by the aerobic/extended-idle regime with propionate as the sole carbon source

Wang, Dongbo; Li, Xiaoming; Yang, Qi; Zheng, Wei; Wu, Yan; Zeng, Tianjing; Zeng, Guangming

doi:10.1016/j.watres.2012.04.036

Cited by 82 publications

(54 citation statements)

References 29 publications

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“…The AEI reactor was operated with three cycles daily according to previous publications with minor revisions [16,17]. Each 8 h cycle consisted of a 1 h feeding period, a 2.5 h aerobic period, a 1 h settling period, and 2 h decanting and 1.5 h idle periods.…”

Section: Full-scale Aei-isf Systemmentioning

confidence: 99%

“…Our recent laboratory studies demonstrated that excellent biological phosphorus removal (BPR) would be achieved in a traditional activated sludge process without specific anaerobic zone if the idle phase was extended suitably (e.g., 210 min) [15][16][17]. Aeration is immediately started in this novel P removal regime when wastewaters are influent into the system.…”

Section: Introductionmentioning

confidence: 99%

“…After aerobic, settling, and decanting phases, an extended-idle phase is finally followed. Thus this novel process is defined as the aerobic/extended-idle (AEI) regime [17]. Compared with the conventional aerobic activated sludge process which do not have the capability of BPR, the AEI regime extends its idle time.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Full-scale evaluation of aerobic/extended-idle regime inducing biological phosphorus removal and its integration with intermittent sand filter to treat domestic sewage discharged from highway rest area

Chen

Liu

et al. 2016

Biochemical Engineering Journal

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a b s t r a c tBiological phosphorus removal (BPR) has been demonstrated to be successfully achieved in the aerobic/extended-idle (AEI) wastewater treatment regime in previous bench-scale studies. To date, however, its feasibility has never been evaluated by any full-scale investigation. Here we report a first full-scale (180 m 3 /day) evaluation of the AEI process and its integration with intermittent sand filter to treat highway rest area sewage that is often neglected but actually brings significant impacts on receiving water bodies in China. The results showed that 70-99% of influent phosphate was removed in the AEI zone, although the sewage contained 23-37% of carbohydrate that is usually considered to be detrimental for BPR. Batch experimental investigation revealed that the presence of glucose (model compound of carbohydrate) promoted the AEI-inducing BPR efficiency, as opposed to deteriorating the conventional anaerobic/oxic regime-inducing BPR performance. Although the performance of AEI zone was affected by seasonal variation, the efficiencies of contaminant removal were stable and excellent (total nitrogen > 86%, others > 92%) in the integrated system. This study offers an attractive option for BPR from carbohydrate-rich wastewaters and also provides a prototype for wastewater treatment in remote areas.

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Section: Full-scale Aei-isf Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Full-scale evaluation of aerobic/extended-idle regime inducing biological phosphorus removal and its integration with intermittent sand filter to treat domestic sewage discharged from highway rest area

Chen

Liu

et al. 2016

Biochemical Engineering Journal

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“…PAOs can consume volatile fatty acids from the influent substrate to synthesize polyhydroxyalkanoate (PHA) and release phosphate. However, the denitrifying bacteria were able to utilize the limited carbon source in the influent to a greater extent than were the PAOs (Wang et al 2012). When carbon inputs decreased, some PAOs (i.e., DPAOs) could use nitrate or nitrite as electron acceptors and, therefore, perform phosphorus uptake and denitrification simultaneously.…”

Section: Mass Balancementioning

confidence: 98%

Simultaneous denitrification and denitrifying phosphorus removal in a full-scale anoxic–oxic process without internal recycle treating low strength wastewater

Wang

Chen

2016

Journal of Environmental Sciences

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Performance of a full-scale anoxic-oxic activated sludge treatment plant (4.0 × 10 5 m 3 /day for the first-stage project) was followed during a year. The plant performed well for the removal of carbon, nitrogen and phosphorus in the process of treating domestic wastewater within a temperature range of 10.8°C to 30.5°C. Mass balance calculations indicated that COD utilization mainly occurred in the anoxic phase, accounting for 88.2% of total COD removal. Ammonia nitrogen removal occurred 13.71% in the anoxic zones and 78.77% in the aerobic zones. The contribution of anoxic zones to total nitrogen (TN) removal was 57.41%.Results indicated that nitrogen elimination in the oxic tanks was mainly contributed by simultaneous nitrification and denitrification (SND). The reduction of phosphorus mainly took place in the oxic zones, 61.46% of the total removal. Denitrifying phosphorus removal was achieved biologically by 11.29%. Practical experience proved that adaptability to gradually changing temperature of the microbial populations was important to maintain the plant overall stability. Sudden changes in temperature did not cause paralysis of the system just lower removal efficiency, which could be explained by functional redundancy of microorganisms that may compensate the adverse effects of temperature changes to a certain degree. Anoxic-oxic process without internal recycling has great potential to treat low strength wastewater (i.e., TN < 35 mg/L) as well as reducing operation costs.

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“…One of the most popular and the best explored sources of organic carbon in reactors with activated sludge is acetic acid. However, volatile fatty acids (VFA) [16][17][18], and substrates like glucose, methanol, ethanol [14,[19][20][21][22] as well as selected types of industrial wastewaters [23,24] or waste products [25][26][27] may serve as good sources of substrates. The beneficial effects of other compounds, like citric acid continue to be investigated [28,29].…”

Section: Introductionmentioning

confidence: 99%

The feasibility of citric acid as external carbon source for biological phosphorus removal in a sequencing batch biofilm reactor (SBBR)

Mielcarek

Rodziewicz

Janczukowicz

et al. 2015

Biochemical Engineering Journal

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Improved biological phosphorus removal performance driven by the aerobic/extended-idle regime with propionate as the sole carbon source

Cited by 82 publications

References 29 publications

Full-scale evaluation of aerobic/extended-idle regime inducing biological phosphorus removal and its integration with intermittent sand filter to treat domestic sewage discharged from highway rest area

Full-scale evaluation of aerobic/extended-idle regime inducing biological phosphorus removal and its integration with intermittent sand filter to treat domestic sewage discharged from highway rest area

Simultaneous denitrification and denitrifying phosphorus removal in a full-scale anoxic–oxic process without internal recycle treating low strength wastewater

The feasibility of citric acid as external carbon source for biological phosphorus removal in a sequencing batch biofilm reactor (SBBR)

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