FOG Discharge Tank Selection

FOG Discharge (Fats, Oils, and Grease) — Bulk Tank Selection at Shipboard Galley Discharge, Cruise-Vessel Food-Processing Effluent, At-Sea Catcher-Processor Operations, Ferry Galley Reception, and Dockside FOG-Pumpout Service

FOG discharge (fats, oils, and grease — the residual food-processing waste stream from shipboard galley + at-sea processor + cruise-vessel food-service + ferry galley + dockside food-prep operations, characteristically containing 100-50,000 mg/L oil-and-grease + 1,000-25,000 mg/L total suspended solids + 2,000-15,000 mg/L COD + variable pH 4.5-7.5 depending on cleaning-chemistry residuals) is the dominant galley-effluent atmospheric-storage chemistry at North American shipboard + cruise-port + at-sea processing + ferry-line + dockside FOG-reception service. Storage envelope is concentrated at HDPE rotomolded vertical and horizontal atmospheric tanks at the 200-3,000-gallon scale at the shipboard equipment-room or dockside FOG-reception facility ahead of the captive grease-trap + dissolved-air-flotation (DAF) + biological-treatment train.

U.S. and Canadian shipboard FOG discharge throughput is concentrated at major cruise lines (Royal Caribbean, Carnival, Norwegian, Disney, MSC, Holland America, Princess, Celebrity, Virgin Voyages, Oceania, Viking, Seabourn, Silversea, Regent Seven Seas), at-sea catcher-processor and surimi-vessel fleet (American Seafoods, Trident Seafoods, Glacier Fish Company, Arctic Storm, Pacific Longline Association, Alaskan Leader Fisheries, At-Sea Processors Association), ferry-line operations (Washington State Ferries, Alaska Marine Highway, BC Ferries, Maine State Ferry Service, Steamship Authority, Cape May-Lewes Ferry, Staten Island Ferry, Vancouver Aquabus, Block Island Ferry), military auxiliary food-service (Military Sealift Command, Coast Guard cutters, Navy ships at home-port reception), and dockside FOG-pumpout reception facilities at major U.S. and Canadian commercial ports.

The eight sections below cite MARPOL Annex V garbage discharge framework + USCG 33 CFR 151 garbage-management framework + EPA VGP and VIDA 33 USC 1322(p) framework + 40 CFR 122 NPDES food-processing-effluent guidelines + 40 CFR 432 meat + poultry products effluent guidelines + 40 CFR 408 canned + preserved seafood processing effluent guidelines + ASTM D1248 polyethylene tank specification + EPA SPCC framework (40 CFR 112) + state DEP wastewater framework + local municipal POTW pretreatment ordinance (typical 100-300 mg/L oil-and-grease limit at the dockside discharge to municipal sewer) + routine operating practice at North American shipboard + cruise-port + at-sea processor + ferry-line FOG-reception service.

1. Material Compatibility Matrix

FOG discharge is a mixed-organic-waste-stream chemistry (animal + vegetable fats + oils + greases + residual food solids + cleaning-chemistry residuals + chloride + dissolved organics) at typical pH 4.5-7.5 depending on cleaning-product carry-over and active microbial fermentation. Compatibility is dominated by elevated-temperature service (warm galley discharge at 110-150F), chloride content from seawater + salt-cure carry-over, and intermittent acidic or alkaline cleaning-product spike events.

The dominant industrial pattern at North American shipboard galley + cruise-port + at-sea processor + ferry-line + dockside FOG-reception is HDPE or XLPE rotomolded vertical atmospheric tank in the 200-3,000-gallon range for the dockside reception holding ahead of the captive grease-trap + DAF + biological-treatment train, combined with FRP at the largest dockside reception installations and 316L stainless at the galley + grease-trap wetted-parts side. OneSource Plastics' 5-brand HDPE network (Norwesco, Snyder Industries, Chem-Tainer, Enduraplas, Bushman) covers the standard atmospheric reception envelope at marine FOG-service scale.

2. Real-World Industrial Use Cases

Cruise-Line Galley + Food-Service Discharge. Royal Caribbean (Symphony of the Seas + Wonder of the Seas + Icon of the Seas + remaining Oasis-class + Quantum-class fleet), Carnival Corporation (Carnival, Holland America, Princess, Cunard, Costa, AIDA, P&O, Seabourn), Norwegian Cruise Line (Breakaway-Plus + Prima class), Disney Cruise Line (Wish + Treasure + Adventure), MSC Cruises (World class + Meraviglia + Seaside class), Virgin Voyages, Oceania, Viking Ocean, Silversea, Regent Seven Seas, plus regional + boutique cruise operators discharge galley + main-restaurant + buffet + specialty-restaurant FOG at typical 200-2,000-gallon-per-day-per-vessel volume into shipboard equipment-room reception holding. Major-cruise vessel galleys serve 3,000-6,000 daily covers x 3 services-per-day, generating substantial FOG load at the main-engine-room equipment level.

At-Sea Catcher-Processor + Surimi-Vessel Operations. American Seafoods (Northern Eagle + Northern Hawk + Northern Jaeger + American Dynasty + Katie Ann + Ocean Rover + American Triumph), Trident Seafoods (Akutan + Ocean Phoenix + Northwest Explorer + Pacific Northwest fleet), Glacier Fish Company (Pacific Glacier + Northern Glacier), Arctic Storm Holdings (Arctic Storm + Arctic Fjord), Alaskan Leader Fisheries, plus Bering Sea + Gulf of Alaska + Pacific groundfish at-sea processor fleet operate fish-processing + surimi-production + roe-processing operations at shipboard scale, generating processor-effluent FOG load at the captive equipment-room reception holding. Magnuson-Stevens Act + NOAA fishery-management plan + USCG-VGP-VIDA framework all apply.

Ferry-Line Galley Reception. Washington State Ferries (Anacortes + Bainbridge + Bremerton + Edmonds + Friday Harbor + Mukilteo + Port Townsend + Sidney BC + Seattle + Vashon routes), Alaska Marine Highway (Tustumena + Kennicott + Aurora + Lituya + LeConte + Matanuska + Columbia + Hubbard + Tazlina), BC Ferries (Tsawwassen + Swartz Bay + Horseshoe Bay + Departure Bay routes), Maine State Ferry Service (Penobscot Bay + Casco Bay routes), Steamship Authority (Hyannis + Woods Hole + Nantucket + Martha's Vineyard), Cape May-Lewes Ferry, Staten Island Ferry, NYC Ferry, plus regional ferry operators discharge passenger + crew galley FOG at typical 50-500-gallon-per-day-per-vessel volume into vessel + dockside reception holding.

Dockside FOG-Pumpout Reception Facility. Cruise-port reception facilities at Port Miami + Port Everglades + PortMiami + Port Canaveral + Galveston + New Orleans + Long Beach + Seattle + New York + Boston + Bayonne (NJ) + Port Tampa Bay + Port of Vancouver BC + Port of Halifax + Port of Saint John NB + Port of Charleston, plus commercial-port FOG-reception terminals at Houston + Galveston + New Orleans + Mobile + Tampa + Norfolk + Savannah + Charleston + Wilmington (NC + DE) + Philadelphia + Boston + Portland (ME) + Halifax operate vessel-to-shore FOG-pumpout reception at HDPE 1,000-5,000-gallon scale ahead of the dockside grease-trap + DAF feed.

Military Auxiliary Galley Reception. Military Sealift Command (T-AKE Lewis and Clark class, T-AOE Supply class, T-AO Henry J. Kaiser class) plus Coast Guard cutters at-sea galley operations discharge similar FOG load at home-port reception. Naval surface combatants and submarines discharge galley FOG at home-port basin reception facilities.

Recreational Marina + Yacht Galley Service. Large-yacht + cruising-yacht + sport-fishing-vessel galley operations at recreational marinas + yacht clubs discharge FOG at small-scale dockside reception during port-side stays.

3. Regulatory Framework

MARPOL Annex V Garbage Discharge. International Convention for the Prevention of Pollution from Ships (MARPOL) Annex V regulates shipboard garbage and food-waste discharge to coastal water with prohibition of plastic + general garbage discharge to sea, with specific allowances for food-waste discharge at distance-from-shore thresholds (greater-than-12-nm in special-area + greater-than-3-nm outside special-area for ground food-waste; specific provisions for cargo-residue and CHRIS code framework).

USCG 33 CFR 151 Garbage Management Framework. U.S. Coast Guard regulations at 33 CFR 151.51-77 require shipboard Garbage Management Plan + garbage record book + garbage-discharge placard + adequate shoreside reception facility framework for U.S.-flag and U.S.-port-calling vessels of 12+ meters length. Galley + processor FOG management is integrated with the broader garbage-management plan framework.

EPA Vessel General Permit (VGP) and VIDA Framework. EPA Vessel General Permit (currently transitioning to Vessel Incidental Discharge Act regulations under 33 USC 1322(p)) governs incidental discharge of galley + food-service + processor effluent from commercial vessels and shoreside vessel-support facilities. VGP-specific limits for graywater + galley discharge include oil-and-grease + total suspended solids + biological-oxygen-demand + fecal-coliform monitoring at the dockside discharge point.

EPA NPDES Food-Processing Effluent Guidelines. EPA effluent guidelines at 40 CFR 432 (meat + poultry products) and 40 CFR 408 (canned + preserved seafood) set baseline + new-source-performance standards for food-processing effluent including FOG + BOD + TSS + ammonia + total nitrogen + chloride. At-sea processor + dockside processor effluent typically discharges to vessel-side hold-tank + dockside reception ahead of NPDES-permit-compliant discharge to surface water or municipal POTW.

Local Municipal POTW Pretreatment Ordinance. Municipal sanitary-sewer-district pretreatment ordinances (Miami-Dade WASD, Broward County water + wastewater, Tampa Bay Water, City of Houston Public Works, Port of Long Beach + LA wastewater, City of Seattle Public Utilities, NYC DEP, Portland Water Bureau, Vancouver Metro) typically set 100-300 mg/L oil-and-grease + 200-400 mg/L BOD discharge limits to municipal sewer; FOG-reception facilities use grease-trap + DAF pretreatment to meet local discharge limit.

EPA SPCC Framework. Coastal industrial sites with bulk FOG reception + chlorinated FOG storage exceeding 1,320-gallon aggregate threshold require SPCC plans under 40 CFR 112; concurrent industrial stormwater permitting under 40 CFR 122 multi-sector general permit applies at most coastal cruise-port + dockside-reception + at-sea-processor-home-port sites.

OSHA HazCom and Confined-Space Framework. FOG handling at the dockside reception facility is regulated under OSHA HazCom (29 CFR 1910.1200) with mixed-stream SDS requirements; confined-space entry into the reception holding tank for cleaning + inspection is regulated under OSHA 29 CFR 1910.146 with atmospheric monitoring + supplied-air respiratory protection at any internal entry due to potential hydrogen-sulfide + low-oxygen + microbial-fermentation gas exposure.

4. Storage System Specification

Shipboard Equipment-Room Reception Tank. Shipboard galley + processor FOG reception holding at HDPE rotomolded 200-2,000-gallon scale (cruise-vessel + at-sea-processor scale) or 50-500-gallon scale (ferry + small-vessel scale): standard HDPE resin per ASTM D1248 specification; vertical flat-bottom or conical-bottom vessel; 4-inch ANSI flanged top fill connection from the galley + processor discharge manifold; 3-inch flanged bottom outlet with PVC or CPVC ball valve to the grease-trap + DAF feed; atmospheric vent with insect-screen + dust-cover + flame-arrester at ferment-vapor service; 18-24-inch top manway for inspection + sludge clean-out access; ultrasonic or radar level transmitter with high-high alarm + low-low alarm.

Dockside FOG-Reception Tank. Dockside vessel-to-shore FOG-pumpout reception at HDPE rotomolded 1,000-5,000-gallon vertical atmospheric scale ahead of the captive grease-trap + DAF + biological-treatment train; HDPE construction with carbon-black UV-stabilizer for outdoor coastal exposure; integration with composite sampler + flow meter + monitoring instrumentation per state-DEP NPDES + local POTW pretreatment ordinance framework.

Grease-Trap and Recovered-FOG Tank. Grease-trap-recovered FOG (typical 5-15% solids + oil-emulsion concentrate) holding at HDPE 500-2,000-gallon vertical atmospheric tank ahead of licensed off-site rendering or biofuel-feedstock hauler pickup; carbon-black UV-stabilizer + secondary-containment integration. Recovered FOG is increasingly directed to renewable-diesel + sustainable-aviation-fuel (SAF) feedstock supply chain (Diamond Green Diesel, Phillips 66 Rodeo Renewed, World Energy Paramount, Marathon Petroleum Martinez, Neste US sourcing).

Cleaning-Chemistry Day-Tank. Galley + processor + reception-tank cleaning-chemistry (sodium hypochlorite + sodium hydroxide + acid-cleaning chemistry) day-tank at HDPE 50-300-gallon vertical scale at the captive cleaning station; CPVC piping + diaphragm metering pump at the cleaning-application skid.

Effluent Discharge Surge Tank. Treated post-grease-trap + post-DAF effluent (less-than-100-mg/L oil-and-grease per typical local POTW ordinance) holding at HDPE 200-2,000-gallon vertical atmospheric scale ahead of NPDES-compliant outfall or municipal-POTW discharge.

5. Field Handling Reality

Handler PPE. FOG handling: chemical-resistant gloves (nitrile or Viton) + chemical-splash goggles + face shield at grease-trap + sludge-dump operations + closed-toe footwear + chemical-resistant apron at the dockside reception transfer. Eye-wash station + emergency shower per OSHA 29 CFR 1910.151 minimum at the chemical-handling area. Hydrogen-sulfide monitor at any confined-space entry due to anaerobic-fermentation H2S generation in stagnant FOG holding.

Pumpout Transfer. Vessel-to-shore FOG transfer is via 2-3-inch CPVC + 316L stainless or duplex 2205 transfer hose + camlock + manual ball-valve isolation; transfer pumps are typically progressive-cavity (handles high-viscosity grease well) or air-operated diaphragm with PP body + EPDM diaphragm at 30-100 gpm transfer rate. USCG 33 CFR 156 oil-transfer-procedure compliance applies at all dockside transfer operations involving oily mixtures.

Microbial-Fermentation and Odor Management. The dominant operating-discipline reality at any FOG holding tank is microbial fermentation: anaerobic and facultative microbial activity in residual FOG generates volatile fatty acids + hydrogen sulfide + odorous mercaptans + ammonia that drive both odor complaints and corrosion of stagnant carbon-steel infrastructure. Active management includes hold-time minimization (less-than-72-hour at any reception tank), odor-control biocide dosing (peracetic-acid 50-100 ppm or chlorine 5-10 ppm at the hold tank), activated-carbon vent-filter at the atmospheric vent, periodic interior tank cleaning + caustic CIP cycle, and dedicated floor-drain trap-priming to prevent sewer-gas backup.

Oil-and-Grease, BOD, and pH QC. Each FOG-reception cycle requires water-quality monitoring at the discharge sample point: oil-and-grease check via Method 1664B or in-line capacitive probe (target less-than-100 mg/L per typical local POTW ordinance), BOD check via Method 5210B at composite sample (target less-than-200-400 mg/L per local ordinance), pH check via in-line glass electrode (target 6.0-9.0 per local POTW ordinance), and total-suspended-solids check at the discharge sample for NPDES compliance.

Spill Response. FOG spill is treated as oil-spill under 40 CFR 110 + OPA-90 framework at coastal sites: contain to secondary containment, deploy oil-absorbent boom + pad, recover via vacuum truck or skimmer to recovery tank, notify USCG National Response Center at any release exceeding the harmful-quantity threshold, notify state DEP per state-specific reportable-threshold framework, document for SPCC + facility-incident-log reporting.

Tank Cleaning and Inspection. Annual or semi-annual FOG reception tank inspection + cleaning per facility procedure: drain to grease-trap-recovered-FOG hauler-pickup tank, mechanical de-greasing with high-pressure hot-water washer + caustic-CIP cycle (1-3% NaOH at 140-160F at 30-60-minute soak) + freshwater triple-rinse + biocide soak (peracetic 200-500 ppm at 1-hour dwell), refill at next campaign. Confined-space entry per OSHA 29 CFR 1910.146 with H2S + LEL + oxygen monitoring + supplied-air respiratory protection at any internal inspection.

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