Long term operation of continuous-flow system with enhanced biological phosphorus removal granules at different COD loading

Li, Dong; Lv, Yanna; Zeng, Huiping; Zhang, Jie

doi:10.1016/j.biortech.2016.06.022

Cited by 27 publications

(8 citation statements)

References 29 publications

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“…Similar overload response was observed by (Farajzadehha et al 2012). It is thus recommend to prevent such abrupt load changes to avoid sludge-overloading and prevent sludge loss (Hamza et al 2016;Li et al 2016). A pH reduction to lower than 6 in the AD stage was also observed at the highest OLR.…”

Section: Discussionsupporting

confidence: 68%

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Efficient high strength petrochemical wastewater treatment in a hybrid vertical anaerobic biofilm (HyVAB) reactor: a pilot study

Wang

Ghimire

et al. 2017

Water Practice and Technology

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Performance of a pilot scale Hybrid Vertical Anaerobic Biofilm (HyVAB) reactor treating petrochemical refinery wastewater is presented here. The reactor is an integration of a bottom anaerobic sludge bed and a top aerobic biofilm stage and was operated continuously for 92 days at 21 ± 2 °C. Wastewater was fed continuously to the reactor with step flow increases reducing hydraulic retention time from 55 to 12 hours, increasing organic loading rate from 3 to 33 kg-COD/m3·d. The HyVAB removed on average 91% and 86% of the soluble and total feed COD, respectively, at steady state and loads up to 23 kg-COD/m3·d, of which 98% of the soluble COD removal occurred in the anaerobic stage. Methane yield ranged from 0.29 to 0.51 L/g-COD removed, including conversion of settled aerobic sludge to methane. Sludge production was low (0.04 kg-VSS/kg-COD removed) and biogas methane content high (84 ± 2%). The results demonstrated that HyVAB is an efficient, low footprint alternative for high strength wastewater treatment.

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Section: Discussionsupporting

confidence: 68%

“…Granules disintegrated and were washed out of the reactor at this condition. The sludge loading was over 0.5 g COD/g VS•d which is considered high for anaerobic granules (Hamza et al 2016;Li et al 2016) and reduced treatment efficiency was observed. Similar overload response was observed by (Farajzadehha et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Efficient high strength petrochemical wastewater treatment in a hybrid vertical anaerobic biofilm (HyVAB) reactor: a pilot study

Wang

Ghimire

et al. 2017

Water Practice and Technology

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“…Continuous flow AGS has also been developed to remove P from wastewater. For instance, Li et al [57,58] reported a CFR system composed of two chambers (anaerobic and aerobic) followed by one settling tank, named the 'Tube Seller', which recirculated 50% of the granules' volume to the anaerobic zone (Figure 5). According to these authors, this continuous flow granular technology allowed granular stability to be maintained and very high C, N and P removal yields to be obtained.…”

Section: (C) Use Of Clarifiersmentioning

confidence: 99%

“…Long et al [55] reported successful inoculations using activated sludge, mature granules or biofilms. However, it has recently been shown that the system that determines the best results in inoculation is with mature granules previously cultivated in a conventional SBR system [51,57,58,61,63,66,76].…”

Section: Granular Biomass In Cfr Systems: Microbial Aspectsmentioning

confidence: 99%

“…Li et al [57,67] described members of the Rhodocyclaceae family as being dominant in CFR systems, highlighting the role played by this group in terms of nitrogen, glycogen and COD removal. Moreover, these authors reported that an increase in the loading rate promoted the proliferation of Thiothrix described as filamentous bacteria, as reported in granules cultivated in SBRs [36], while the abundance of PAO was compromised.…”

Section: Granular Biomass In Cfr Systems: Microbial Aspectsmentioning

confidence: 99%

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New Advances in Aerobic Granular Sludge Technology Using Continuous Flow Reactors: Engineering and Microbiological Aspects

Rosa-Masegosa

Muñoz-Palazon

González‐Martínez

et al. 2021

Water

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Aerobic granular sludge (AGS) comprises an aggregation of microbial cells in a tridimensional matrix, which is able to remove carbon, nitrogen and phosphorous as well as other pollutants in a single bioreactor under the same operational conditions. During the past decades, the feasibility of implementing AGS in wastewater treatment plants (WWTPs) for treating sewage using fundamentally sequential batch reactors (SBRs) has been studied. However, granular sludge technology using SBRs has several disadvantages. For instance, it can present certain drawbacks for the treatment of high flow rates; furthermore, the quantity of retained biomass is limited by volume exchange. Therefore, the development of continuous flow reactors (CFRs) has come to be regarded as a more competitive option. This is why numerous investigations have been undertaken in recent years in search of different designs of CFR systems that would enable the effective treatment of urban and industrial wastewater, keeping the stability of granular biomass. However, despite these efforts, satisfactory results have yet to be achieved. Consequently, it remains necessary to carry out new technical approaches that would provide more effective and efficient AGS-CFR systems. In particular, it is imperative to develop continuous flow granular systems that can both retain granular biomass and efficiently treat wastewater, obviously with low construction, maintenance and exploitation cost. In this review, we collect the most recent information on different technological approaches aimed at establishing AGS-CFR systems, making possible their upscaling to real plant conditions. We discuss the advantages and disadvantages of these proposals and suggest future trends in the application of aerobic granular systems. Accordingly, we analyze the most significant technical and biological implications of this innovative technology.

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Continuous flow reactors for cultivating aerobic granular sludge: configuration innovation, principle and research prospect

Yan

Cui

Huang

2021

J of Chemical Tech & Biotech

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Efficient start‐up, cultivation and maintenance of aerobic granular sludge (AGS) in continuous flow reactors (CFRs) is critical for its full‐scale application in wastewater treatment plants (WWTPs). The successful implementation of AGS under continuous flow condition depends on the configuration of CFR that provides the selective pressures and hydraulic shear force (HSF) to sludge required for rapid granulation. Important progress has been witnessed with respect to CFR configurations in recent decades for in‐situ granulation of aerobic sludge. This review summarized the difficulties of granulation during continuous flow, as well as the reactor configuration, granulation mechanism and the AGS characteristics, along with the future research prospects. It is of significance to promote the innovation of continuous flow configuration in order to realize the AGS application in mainstream WWTPs in the future. © 2021 Society of Chemical Industry (SCI).

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Long term operation of continuous-flow system with enhanced biological phosphorus removal granules at different COD loading

Cited by 27 publications

References 29 publications

Efficient high strength petrochemical wastewater treatment in a hybrid vertical anaerobic biofilm (HyVAB) reactor: a pilot study

Efficient high strength petrochemical wastewater treatment in a hybrid vertical anaerobic biofilm (HyVAB) reactor: a pilot study

New Advances in Aerobic Granular Sludge Technology Using Continuous Flow Reactors: Engineering and Microbiological Aspects

Continuous flow reactors for cultivating aerobic granular sludge: configuration innovation, principle and research prospect

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