MON Wastewater .


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Wastewater Topics. Definitions and principle conceptsHow to decide G1/G2 streamsMaintenance WW planAqueous in-procedure streamsRecovery versus consistence treatmentHalogenated ventsOffsite treatmentUpdate on Wastewater NSPS, Subpart YYY. Wastewater Concepts. Fundamentally
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MON Wastewater Paul R. Jann DuPont Engineering November 6, 2003

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Wastewater Topics Definitions and lead ideas How to decide G1/G2 streams Maintenance WW arrange Aqueous in-process streams Recovery versus consistence treatment Halogenated vents Offsite treatment Update on Wastewater NSPS, Subpart YYY

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Wastewater Concepts Basically "doin\' the HON" with a couple changes just exists after dispose of from a MCPU Process wastewater incorporates cleaning operations in the middle of bunches must control if meet Group 1 criteria various consistence choices Maintenance wastewater create and execute plan to minimize In-process steams in open movement must control if have "Gathering 1 attributes"

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Key Definitions Wastewater [MON 63.2550(i)] Process Wastewater [HON 63.101] Maintenance Wastewater [MON 63.2550(i)] Point of Determination (POD) [HON 63.111] Aqueous in-process stream (AIPs) [HON 63.149]

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Wastewater [MON 63.2550(i)] Wastewater implies water that is disposed of from a MCPU through a solitary POD and that contains either: a yearly normal convergence of mixes in Table 8 or 9 to this subpart of no less than 5 ppmw and has a yearly normal flowrate of 0.02 liters for each moment or more noteworthy; or a yearly normal centralization of mixes in Table 8 or 9 to this subpart of no less than 10,000 ppmw at any flowrate . The accompanying are not considered wastewater for the motivations behind this subpart: (1) Stormwater from isolated sewers; (2) Water from putting out fires and downpour frameworks, including testing of such frameworks; (3) Spills; (4) Water from wellbeing showers; (5) Samples of a size not more prominent than sensibly important for the strategy for investigation that is utilized; (6) Equipment spills; (7) Wastewater dribbles from strategies, for example, detaching hoses in the wake of cleaning lines; and (8) Noncontact cooling water.

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Process Wastewater [HON 63 .101] Process wastewater implies wastewater which, amid assembling or preparing, comes into direct contact with or comes about because of the creation or utilization of any crude material, middle of the road item, completed item, by‑product, or squander item. Cases are item tank drawdown or nourish tank drawdown ; water shaped amid a synthetic response or utilized as a reactant; water used to wash polluting influences from natural items or reactants; water used to cool or extinguish natural vapor streams through direct contact; and consolidated steam from fly ejector frameworks pulling vacuum on vessels containing organics.

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Maintenance Wastewater [MON 63.2550(i)] Maintenance wastewater implies wastewater created by the emptying of process liquid out of parts in the MCPU into an individual deplete framework in planning for or amid upkeep exercises. Upkeep wastewater can be created amid arranged and spontaneous shutdowns and amid periods not connected with a shutdown. Cases of exercises that can produce upkeep wastewater incorporate descaling of warmth exchanger tubing packs, cleaning of refining segment traps, depleting of pumps into an individual deplete framework, and depleting of bits of the MCPU for repair. Wastewater from routine cleaning operations happening as a feature of clump operations is not considered upkeep wastewater.

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Point of Determination [HON 63.111] Point of assurance means every point where handle wastewater leaves the concoction fabricating process unit. Note to definition for purpose of assurance: The direction permits assurance of the attributes of a wastewater stream (1) at the purpose of assurance or (2) downstream of the purpose of assurance if amendments are rolled out for improvements in stream rate and yearly normal centralization of Table 8 or Table 9 mixes as decided in Sec. 63.144 of this subpart. Such changes incorporate misfortunes via air outflows; decrease of yearly normal fixation or changes in stream rate by blending with other water or wastewater streams; and lessening in stream rate or yearly normal focus by treating or generally taking care of the wastewater stream to expel or annihilate unsafe air toxins.

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Aqueous In-Process [HON 63.149] No formal definition, requires control on particular hardware to be steady with criteria in HON Table 35; i.e. prohibits open movement of water (process liquids not yet disposed of) with Group 1 attributes Applies to: deplete, deplete center, sewer vent, lift station, trench, pipe, or oil/water separator, or tank Examples: open trench or open top vessel

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Key Definitions (cont\'d) Wastewater HAPs MON Tables 8 & 9 Recovery Device [MON 63.2550(i)] Indiviual Drain System (IDS) [ HON 63.111] Waste Management Unit [MON 63.2550(i)] Group 1 wastewater stream [MON 63.2550(i)]

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Wastewater HAPs [MON Tables 8 and 9] Both MON & HON Rule utilize same Table names MON Rule - 76 HAP mixes Table 8 - Partially Soluble HAPs (61 cmpds) Table 9 - Soluble HAPs (15 cmpds) HON Rule - 76 HAP mixes Table 8 - Very Volatile HAPs (24 cmpds, new CPUs) Table 9 - All wastewater HAPs (76 cmpds, existing CPUs & Table 8 is incorporated into Table 9 list)

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Recovery Device [MON 63.2550(i)] Recovery gadget implies an individual unit of gear utilized with the end goal of recuperating chemicals from process vent streams for reuse in a procedure at the influenced source and from wastewater streams for fuel esteem (i.e., net positive warming quality), utilize, reuse, or available to be purchased for fuel esteem, utilize or reuse . Cases of gear that might be recuperation gadgets incorporate safeguards, carbon adsorbers, condensers, oil-water separators or natural water separators, or natural expulsion gadgets, for example, decanters, strippers, or thin-film vanishing units. To be a recuperation gadget for a wastewater stream , a decanter and some other hardware in view of the working guideline of gravity partition must get just multi-stage fluid streams.

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Individual Drain System [HON 63.111] Individual deplete framework implies the stationary framework used to pass on wastewater streams or residuals to a waste administration unit or to release or transfer . The term incorporates hard‑piping, all procedure channels and intersection boxes, together with their related sewer lines and other intersection boxes, sewer vents, sumps, and lift stations, passing on wastewater streams or residuals. An isolated stormwater sewer framework, which is a deplete and gathering framework outlined and worked for the sole reason for gathering precipitation spillover at an office, and which is isolated from all other individual empty frameworks, is rejected out of this definition .

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Waste Management Unit [MON 63.2550(i)] Waste administration unit implies the hardware, structure(s), as well as device(s) used to pass on, store, treat, or discard wastewater streams or residuals . Cases of waste administration units incorporate wastewater tanks, air buoyancy units, surface impoundments, compartments, oil-water or natural water separators, singular deplete frameworks, natural wastewater treatment units, squander incinerators, and natural expulsion gadgets, for example, steam and air stripper units, and thin film vanishing units. On the off chance that such hardware is being worked as a recuperation gadget , then it is a piece of a random natural synthetic assembling process and is not a waste administration unit.

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Group 1 Wastewater [MON 63.2550(i)] Group 1 wastewater stream implies a wastewater stream comprising of process wastewater at a current or new source that meets the criteria for Group 1 status in §63.2485(c) for mixes in Tables 8 and 9 to this subpart as well as a wastewater stream comprising of process wastewater at another source that meets the criteria for Group 1 status in §63.132(d) for HAP mixes in Table 8 to subpart G of this section 63.

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Group 1 Wastewater - Existing >10,000 ppmw consolidated T8/T9 HAP at any stream rate if Table 8 >50 ppmw; >1,000 ppmw joined T8/T9 HAP at flowrate > 1 L/min. in the event that Table 8 >50 ppmw; >30,000 ppmw solvent T9 HAP with yearly load >1 ton/year.

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Group 1 Wastewater - New >10,000 ppmw joined T8/T9 HAP at any stream rate if Table 8 >50 ppmw; >1,000 ppmw consolidated T8/T9 HAP at flowrate > 1 L/min. in the event that Table 8 >50 ppmw; >4,500 ppmw solvent T9 HAP with yearly load >1 ton/year. > 10 ppmw of HON Table 8 HAPs at flowrate > 0.02 L/min

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Group 1 Determination Compute yearly normal focus and flowrate for every wastewater stream at POD (can utilize handle information; chronicled information; or measure w/EPA techniques) For Continuous MCPU - assess every stream For Batch MCPU - aggregate over all bunches and related group of materials made in same MCPU Divide add up to yearly HAP mass by aggregate yearly wastewater volume

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Example Calculation #1 Benzene (T8) - 25 ppmw avg Toluene (T8) - 30 ppmw avg Xylene (T8) - 8 ppmw avg subtotal Table 8 = 63 ppmw (> 50 ppmw) Methanol (T9) - 850 ppmw avg Toluidine (T9) - 275 ppmw avg subtotal Table 9 = 1125 ppmw (> 1000 ppmw) Total HAP = 1188 ppmw avg @ 2.5 L/min Therefore a Group 1 wastewater stream

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Example Calculation #2 Benzene (T8) - 15 ppmw Toluene (T8) - 20 ppmw Xylene (T8) - 8 ppmw subtotal Table 8 = 43 ppmw (<50 ppmw) Methanol (T9) - 1850 ppmw Toluidine (T9) - 3000 ppmw subtotal Table 9 = 4850 ppmw (<30,000 ppmw) Total HAP = 4893 ppmw avg @ 2.5 L/min (7.1 tn/yr stack) Therefore a Group 2 wastewater stream

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Example Calculation #3 POD = clump filtrate going to deplete and open sump "Group of Materials" for MCPU = Products An and B Product A = 500 lady and 300 lbs HAP for every cluster (75/year) Product B = 800 lady and 250 lbs HAP for each cluster (100/year) Total yearly HAP mass = 47,500 lb

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