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This report includes four conceptual design reports prepared by the NYCDEP as requested by the HEP nutrient workgroup. To date, the NYCDEP has prepared conceptual design reports for the Red Hook, Port Richmond, North River, and Owls Head WPCPs in support of the HEP analysis. 1.1 Treatment Technologies As part of the Harbor Estuary Program, the Advanced Wastewater Treatment Program Assistance (AWTPA) Team will develop conceptual designs for nitrogen and carbon removal technologies at the four WPCPs. Ten levels of treatment were identified as well as corresponding sets of secondary effluent characteristics that should be achieved at each level. The ten levels identified are described in detail below and are listed here: • Base Case • Existing Conditions • Existing Conditions with Solids Filtration • Existing Conditions with Microfiltration/Ultrafiltration • Advanced Basic BNR • Full Step BNR • Full Step BNR with Solids Filtration • Full Step BNR with Microfiltration/Ultrafiltration • Full Step BNR with Denitrification Filters • Membrane Bioreactor Tanks It should be emphasized that possible changes in wastewater quality and quantity between now and 2045 could heavily influence technology selection and may result in additional technologies being considered in the future. In addition, this analysis is based on evaluating current “state-ofthe-art” treatment technologies. The evolution of current technologies in addition to any new treatment processes may provide additional options to be assessed in the future. 1.1.1 Base Case The Base Case scenario is based on the treatment level permitted for the WPCP. The principal design considerations include: • 25 mg/L CBOD 5 and 30 mg/L TSS or 85% removal, whichever is stricter • Assume 35% removal of TN, based on the projected nitrogen loading for 2045. The same TN removal efficiency is assumed for all WPCPs considered in this project • Design dry weather flow rate • Assumed treatment levels are shown for each plant in Table EX-1 in the Executive Summary The base case scenario is defined as the treatment level that meets the current permit levels for wastewater discharge. The treatment process evaluated for the base case is the existing condition.
The treatment levels to be examined for the base case are the levels upon which each WPCP is permitted to operate. The permit levels described in the State Pollutant Discharge Elimination System (SPDES) are summarized in Table 1-1. Flow Table 1-1: Permit Limits, Levels and Monitoring Requirements for the HEP WPCPs Permit Sample Parameter Unit Type Remarks level frequency mgd 12 months avg CBOD 5 mg/L Monthly avg 7-day avg TSS Nitrogen Total Ammonia TKN Nitrite Nitrate Phosphorus Total Soluble (ortho) mg/L mg-N/L mg-P/L 1.1.2 Existing Conditions Monthly avg 7-day avg 1-day maximum N/A N/A 60 – PR 60 – RH 170 – NR 120 – OH 25 40 30 45 50 To be monitored To be monitored Continuous 1/day 1/day 1/day 1/day 1/day 1/week 2/month At least 85% removal At least 85% removal The Existing Conditions scenario maintains the treatment levels currently achieved at each WPCP. The design considerations include: Existing plant effluent quality for CBOD and TSS (using average of FY2003-05, see Table EX-1 and Table 1-2 below) Existing plant removal percentage for TN Existing plant flow Existing wastewater flow, influent concentrations, and effluent concentrations were calculated by taking averages of the operational data during fiscal years of 2003 through 2005. A summary of the existing plant influent and effluent characteristics from 2003 to 2005 is presented in Table 1- 2.
Page 2 and 3: Executive Summary At the request of
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Page 16 and 17: Figure EX-8: Membrane Bioreactor $9
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Page 36 and 37: 300,000 250,000 TSS Load (lbs/day)
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Harbor Estuary Program June 2007 Po
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Red Hook WPCP HEP Conceptual Design
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HYPOCHLORITE STORAGE TANKS Average
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Parameter Units Minimum Week Minimu
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SECTION DETAIL SECTION SECTION AERA
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MWH/Hazen & Sawyer A Joint Venture
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