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Table 1-4: Carbon and Nitrogen Removal Technologies Summary Level of Treatment Characteristics Base Case Effluent Characteristics: • Current permitted effluent quality, according to SPDES permit CBOD ≤ 25mg/L TSS ≤ 30mg/L • TSS = 30mg/L, CBOD = 25mg/L or 85% removal from influent conditions, whichever is stricter TN = 18-21mg/L • TN removal of 35% Existing Conditions Effluent Characteristics: CBOD = 8-15mg/L TSS = 8-18mg/L TN = 13-19mg/L Existing Conditions with Solids Filtration Effluent Characteristics: CBOD = 3-5mg/L TSS = 4-5mg/L TN = 13-19mg/L Existing Conditions with Microfiltration/Ultrafiltration Effluent Characteristics: CBOD = 1-2mg/L TSS = ~1mg/L TN = 13-19mg/L Advanced Basic BNR Effluent Characteristics: CBOD = 10-15mg/L TSS = 12-15mg/L TN = 10-12mg/L Full-Step BNR Effluent Characteristics: CBOD = 10-15mg/L TSS = 12-15mg/L TN = 6-10mg/L • Plant flow and effluent quality for Fiscal Years 2003 to 2005 • Assumes current performance observed will continue Same characteristics from Existing Conditions option, but with the following additions: • 1,500 mg/L AEMLSS • Deep-bed sand filters added after secondary treatment to provide additional solids and carbon removal • Water backwash and air scour system for filter cleaning Same characteristics from Existing Conditions option, but with the following additions: • 1,500 mg/L AEMLSS • Zenon Microfilters/Ultrafilters added after secondary treatment to provide additional solids and carbon removal • Air scour system for filter cleaning • 2 mm screens upstream of Microfilters/Ultrafilters Biological Nitrogen Removal Enhancements to Secondary treatment to include: • 2,000 mg/L AEMLSS • 0-33-33-33 flow split • Baffles to create switch zones • Anoxic and Pre-anoxic zones with mixers • Froth control hoods • Alkalinity addition • Return sludge capability at 50% Biological Nitrogen Removal Enhancements to Secondary treatment to include: • 2,500 mg/L AEMLSS • 10-40-30-20 flow split • Baffles to create switch zones • Anoxic and Pre-anoxic zones with mixers • Froth control hoods • Alkalinity addition • Return sludge capability at 100% • Methanol Addition
Level of Treatment Full-Step BNR with Solids Filtration Effluent Characteristics: CBOD = 3-5mg/L TSS = 4-5mg/L TN = 6-10mg/L Full-Step BNR with Microfiltration/Ultrafiltration Effluent Characteristics: CBOD = 1-2mg/L TSS = ~1mg/L TN = 6-10mg/L Full-Step BNR with Denitrification Filters Effluent Characteristics: CBOD = 3-5mg/L TSS = 4-5mg/L TN = 4-5mg/L Membrane Bioreactors Effluent Characteristics: CBOD = 1-2mg/L TSS = ~1mg/L TN = 3-4mg/L Characteristics Same characteristics from Full-Step BNR option, but with the following additions: • Deep-bed sand filters added after secondary treatment to provide additional solids and carbon removal • Water backwash and air scour system for filter cleaning Same characteristics from Full-Step BNR option, but with the following additions: • Zenon Microfilters/Ultrafilters added after secondary treatment to provide additional solids and carbon removal • Air scour system for filter cleaning • 2 mm screens upstream of Microfilters/Ultrafilters Same characteristics from Full-Step BNR option, but with the following additions: • Denitrification filters added after secondary treatment to provide additional solids, carbon, and nitrogen removal • Water backwash and air scour system for filter cleaning Zenon Membrane Bioreactor inclusion in Secondary treatment to include: • 8,500 mg/L AEMLSS (10,000 mg/L at OH) • Internal recycle from Pass C to Pass A • Anoxic zones • Alkalinity addition • Return sludge capability at 300% • Methanol Addition • Air scour system for filter cleaning • 6 mm and 2 mm screens upstream of MBRs 1.2 Design Standards Basic design standards employed for the conceptual design are consistent for the four WPCPs considered in the HEP as summarized below: • Design standard is 1.5 times design dry weather flow for secondary treatment components sized on the basis of flow. Secondary bypass channel to be preserved • Design standard is 2.0 times dry weather flow for components before/after secondary bypass • Design standard is projected 2045 load for components sized on the basis of load • Degree of redundancy is N+1 for process infrastructure, N+1+1 for process equipment 1.3 Influent Flows and Loads The flows and loads used for the basis of design for this evaluation are based on the NYCDEP Interim Water Demand and Wastewater Flow Projections developed by the Bureau of Environmental Planning and Assessment (BEPA) in July 2006, with the exception of the North River WPCP, which is explained in detail in Section 1.3.3. The projections utilized the
Page 2 and 3: Executive Summary At the request of
Page 4 and 5: two options are defined for process
Page 6 and 7: WPCP 26th Ward Bowery Bay Coney Isl
Page 8 and 9: Table EX-2: Key Cost Assumptions An
Page 10 and 11: Figure EX-2: Microfiltration/Ultraf
Page 12 and 13: Figure EX-4: Full Step BNR $350 Cap
Page 14 and 15: Figure EX-6: Full Step BNR with Den
Page 16 and 17: Figure EX-8: Membrane Bioreactor $9
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Page 20 and 21: Table 1-2: 2003-2005 Influent and E
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Page 28 and 29: 1.1.10 Membrane Bioreactors Figure
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Page 34 and 35: Table 1-10: Flow and Load Peaking F
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HYPOCHLORITE STORAGE TANKS Average
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Parameter Units Minimum Week Minimu
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EFFLUENT FILTER PLAN FACILITY AND F
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NORTH FINE SCREENING FACILITY BOTTO
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SECTION DETAIL SECTION SECTION AERA
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MWH/Hazen & Sawyer A Joint Venture
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