Pilot Testing of Upflow Continuous Backwash Filters for Tertiary Denitrification and Phosphorus Removal

Schauer, Peter; Rectanus, R.; deBarbadillo, C.; Barton, D. A.; Gebbia, R.; Boyd, Brian; McGehee, M.

doi:10.2175/193864706783763363

Cited by 8 publications

(7 citation statements)

References 4 publications

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“…The pilot plant's NOx-N loading rates were comparable to those cited by the USEPA (1993) and Tchobonoglous et al (2003) for the same types of filters and media. In addition, the observed loading and removal rates were comparable to those reported by Schauer et al (2006) for upflow continuously backwashed denitrification filters (with a subangular media with effective size of 1.4 to 1.6 mm).…”

Section: Denitrification Filter Performancesupporting

confidence: 83%

Experiences in Using MBBR and Denitrification Filters for Nitrogen Removal from Saline Wastewater

deBarbadillo¹,

Bates²,

Chan³

et al. 2010

proc water environ fed

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As water recycling becomes more widespread, brine disposal and the removal of nitrogen and phosphorus from a wastewater that is relatively high in chlorides have emerged as important areas of study and development. This paper discusses the use of biofilm processes for both nitrification and denitrification of saline wastewaters. Testing results from parallel pilot-scale submerged aerated filter (SAF) and moving bed bioreactors (MBBR) for nitrification followed by deep-bed denitrification filters on a municipal wastewater with an average chloride concentration of 6,000 mg/L are summarized. The lessons learned were applied to the full-scale design of a nitrification MBBR and of denitrification filters for treatment of reverse osmosis concentrate from a water recycling plant. The paper will discuss design considerations and the first year of full-scale operating data.

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Section: Denitrification Filter Performancesupporting

confidence: 83%

Experiences in Using MBBR and Denitrification Filters for Nitrogen Removal from Saline Wastewater

deBarbadillo¹,

Bates²,

Chan³

et al. 2010

proc water environ fed

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“…This research indicated that varying retention fimes between 22.6 and 11.4 min had a slight impact on the removal rates. Schauer et al (2006) found removal rates between 60 and 95% for retention times between 11 and 14 min.…”

Section: Influence Of the Inflow Ioads On The Profiiesmentioning

confidence: 92%

Dissolved oxygen, COD, nitrogen and phosphorus profiles in a continuous sand filter used for WWTP effluent reclamation

Scherrenberg

Lier

2012

Water Science and Technology

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Continuous sand filtration (CSF) offers interesting potential for the extensive treatment of wastewater treatment plant (WWTP) effluents for water reclamation and/or restrictive discharge. Research on concentration profiles over the height of the CSF shows that most bacteriological conversions are restricted to the lower part of the filter bed. Dissolved oxygen (DO) rapidly decreases to below 1 mg/L in the first 0.4 m of the filter bed, applying hydraulic velocities of 12.9 ∼ 14.9 m/h and 10 ∼ 20 mm/min sand velocities, independent of the methanol dosage. The DO decrease agrees with the observed decrease in chemical oxygen demand (COD). At the given operational conditions, NO(x)-N and N-total removal is dedicated to the first 0.9 m of the filter bed. Results show that by optimising the CSF operational conditions the very restrictive effluent N and P values of 2.2 and 0.15 mg/L, respectively, as described in the European Water Framework Directive, can be met.

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“…Therefore, the theoretical stoichiometric phosphorus requirement for biological denitrification (using methanol) is (0.0035 g P/ g COD O 0.22 g N/g COD ¼) 0.016 g P/g N, or 0.02 g P/g N. This value assumes no endogenous decay and, therefore, does not account for the fact that the value may be reduced as the time biomass is retained in the system increases. The application of Y M,2 equals 0.36 g COD/g COD has resulted in the calculated stoichiometric phosphorus requirement being less than values reported for non-methanol degrading heterotrophic organisms which range from 0.04 to 0.06 g P/g N (Grady et al, 2011;Schauer et al, 2006;Husband and Becker, 2007).…”

Section: Phosphorus Requirements As a Macronutrient In Postdenitrificmentioning

confidence: 96%

“…The pilot-scale upflow, continuously backwashing postdenitrification BAF reported by deBarbadillo et al (2006) and Schauer et al (2006) (Dynasandä, Parkson Corporation, Florida, U.S.A.) was located at the Hagerstown WWTP, Hagerstown, MD, USA. The BAF had a plan area of 1.0-m 2 , and was filled with 1.55e1.65-mm equivalent diameter angular (sand) media.…”

Section: Pilot-scale Post-denitrification Bafmentioning

confidence: 99%

Method to identify potential phosphorus rate-limiting conditions in post-denitrification biofilm reactors within systems designed for simultaneous low-level effluent nitrogen and phosphorus concentrations

et al. 2012

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Pilot Testing of Upflow Continuous Backwash Filters for Tertiary Denitrification and Phosphorus Removal

Cited by 8 publications

References 4 publications

Experiences in Using MBBR and Denitrification Filters for Nitrogen Removal from Saline Wastewater

Experiences in Using MBBR and Denitrification Filters for Nitrogen Removal from Saline Wastewater

Dissolved oxygen, COD, nitrogen and phosphorus profiles in a continuous sand filter used for WWTP effluent reclamation

Method to identify potential phosphorus rate-limiting conditions in post-denitrification biofilm reactors within systems designed for simultaneous low-level effluent nitrogen and phosphorus concentrations

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