Excess Biofilm Control by Distributor-Speed Modulation

Albertson, Orris E.

doi:10.1061/(asce)0733-9372(1995)121:4(330)

Cited by 13 publications

(10 citation statements)

References 3 publications

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“…(Brief summaries of the different filter media used in TFs with their targeted pollutants removed are given in Tables 2 and 3). It was also reported that TF performance can be enhanced by maintaining media surface wetting and maintaining the aerobic environment during operation [122]. Wang et al [119] reported the performance of hybrid biological rectors using polyurethane foam pores as filter media and observed that the total biomass concentration in hybrid reactors increased to 4.30-5.75 g/l when the volumetric portion of the carrier was 15-30%.…”

Section: Trickling Filter Operational Problems and Proposed Solutionsmentioning

confidence: 99%

Identification and Elucidation of the Designing and Operational Issues of Trickling Filter Systems for Wastewater Treatment

Ali¹,

Khan²,

Peng³

et al. 2017

Pol. J. Environ. Stud.

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Section: Trickling Filter Operational Problems and Proposed Solutionsmentioning

confidence: 99%

Identification and Elucidation of the Designing and Operational Issues of Trickling Filter Systems for Wastewater Treatment

Ali¹,

Khan²,

Peng³

et al. 2017

Pol. J. Environ. Stud.

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“…The pilot NTF utilizes a tipping bucket to distribute influent over the media, with 50% of the NTF surface area dosed for each "tip." This dosing mechanism pulsed a relatively large volume of influent wastewater to the NTF, thereby enhancing excess biofilm sloughing; both Albertson (1995) and Parker et al (1989) raised the concern of excess biofilm accumulation, and suggested a large hydraulic pulse to remedy the problem. The operating dosing rate for the flow rates evaluated in this study ranged from 6 to38 mm/tip, sufficient to prevent excess biofilm accumulation.…”

Section: A Te Ria Ls and M Eth O D Smentioning

confidence: 99%

Of: **Symbolic Regression of Upstream, Stormwater, and Tributary E. Coli Concentrations Using River Flows, Jagupilla, S. C. K.; Vaccari, D. A.; Miskewitz, R.; Su, T.‐L.; Hires, R. I. (2015), 87, 26‐34; correction 87,** 576.

Minervini¹,

Jagupilla²,

Vaccari³

et al. 2016

Water Environment Research

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Colfax, WA, operates an aerated lagoon to achieve compliance with its National Pollutant Discharge Elimination System (NPDES) permit, which currently requires biochemical oxygen demand (BOD) and total suspended solids (TSS) removal. However, ammonia removal may soon be required, and Colfax is considering a nitrifying trickling filter (NTF) that would allow them to also maintain the lagoons. To obtain data from which to ultimately design a full-scale system, a four-year NTF pilot study was performed. Results demonstrated that an NTF would be an effective, reliable NH3 removal method and could produce effluent NH3 concentrations < 1 .0 mg/L. NTF performance was characterized by zero-and first-order kinetics; zero-order rates correlated with influent NH3 concentrations and mass load. Utilizing

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“…On the other hand, too low SK values will produce accumulation of solids, limiting oxygen transfer and causing odour problems, plugging, water pond formation inside the filter (ponding), channelling, and poor biofilm wetting (Albertson, 1995).…”

Section: Distributor Speed and Application Ratementioning

confidence: 99%

Hydraulic Distribution Effect on a Real-Scale Trickling Filter

Pozo¹,

Diez²,

Garrido³

et al. 2002

Environmental Engineering Science

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In this work, the influence of several operational parameters on the efficiency of a real-scale trickling filter placed in an urban wastewater treatment plant in Mexico, is discussed. Special attention is placed on the parameters that influence the biofilm hydraulics such as the instantaneous dosing intensity (SK) and the radial distribution of the superficial hydraulic load. The low speed of the distribution arms forced an instantaneous dosing intensity of 150 mm/pass, resulting in a short liquid retention time of 32 s, which was the reason why a poor COD removal efficiency was obtained. The average removal is 36%, although the daily efficiencies increase with increasing inlet COD concentrations. However, the high shear forces of the water provides a constant and homogenous biofilm detachment, avoiding filter clogging because of the solids. Finally, a slight decrease in the theoretical efficiency has been found due to a nonuniform radial distribution of flow, because the real superficial load is too high in the center of the filter.

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Excess Biofilm Control by Distributor-Speed Modulation

Cited by 13 publications

References 3 publications

Identification and Elucidation of the Designing and Operational Issues of Trickling Filter Systems for Wastewater Treatment

Identification and Elucidation of the Designing and Operational Issues of Trickling Filter Systems for Wastewater Treatment

Of: **Symbolic Regression of Upstream, Stormwater, and Tributary E. Coli Concentrations Using River Flows, Jagupilla, S. C. K.; Vaccari, D. A.; Miskewitz, R.; Su, T.‐L.; Hires, R. I. (2015), 87, 26‐34; correction 87,** 576.

Hydraulic Distribution Effect on a Real-Scale Trickling Filter

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Excess Biofilm Control by Distributor-Speed Modulation

Cited by 13 publications

References 3 publications

Identification and Elucidation of the Designing and Operational Issues of Trickling Filter Systems for Wastewater Treatment

Identification and Elucidation of the Designing and Operational Issues of Trickling Filter Systems for Wastewater Treatment

Of: Symbolic Regression of Upstream, Stormwater, and Tributary E. Coli Concentrations Using River Flows, Jagupilla, S. C. K.; Vaccari, D. A.; Miskewitz, R.; Su, T.‐L.; Hires, R. I. (2015), 87, 26‐34; correction 87, 576.

Hydraulic Distribution Effect on a Real-Scale Trickling Filter

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Product

Resources

About

Of: **Symbolic Regression of Upstream, Stormwater, and Tributary E. Coli Concentrations Using River Flows, Jagupilla, S. C. K.; Vaccari, D. A.; Miskewitz, R.; Su, T.‐L.; Hires, R. I. (2015), 87, 26‐34; correction 87,** 576.