OMNIPURE TM Series 55/64 Marine Sewage Treatment The OMNIPURE Series 55/64 marine sewage treatment system provides effective treatment of black and gray water through a certified process. Offshore oil and gas operations generate sewage that can contain contaminants which have a detrimental effect on water quality and the overall marine environment. As a result, marine sewage treatment systems are required to lessen the environmental impact. At De Nora Water Technologies we understand the importance of providing safe and effective treatment of black and gray water. That’s why we’ve designed the OMNIPURE™ Series 55/64 marine sewage treatment systems to provide wastewater effluent quality well below MEPC.227(64) requirements while eliminating the requirement to handle waste solids from raw, untreated influent. The OMNIPURE Series 55/64 systems have received Bureau Veritas certification per IMO Resolution MEPC.227(64) and USCG Certificate of Approval to MEPC.227(64).
Transcript
OMNIPURETM Series 55/64 Marine Sewage TreatmentThe OMNIPURE Series 55/64 marine sewage treatment system provides effective treatment of black and gray water through a certified process.
Offshore oil and gas operations generate sewage that can contain contaminants which have a detrimental effect on water quality and the overall marine environment. As a result, marine sewage treatment systems are required to lessen the environmental impact.
At De Nora Water Technologies we understand the importance of providing safe and effective treatment of black and gray water. That’s why we’ve designed the OMNIPURE™ Series 55/64 marine sewage treatment systems to provide wastewater effluent quality well below MEPC.227(64) requirements while eliminating the requirement to handle waste solids from raw, untreated influent. The OMNIPURE Series 55/64 systems have received Bureau Veritas certification per IMO Resolution MEPC.227(64) and USCG Certificate of Approval to MEPC.227(64).
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OMNIPURETM Series 55/64Offshore Marine Sewage Treatment
- Easy to install, operate and service- Lightweight package- Minimal maintenance- No additional tanks or filtration equipment required
Stage 1: sewage is macerated while Biological Oxygen Demand (BOD), Total Organic Carbon (TOC) and fecal coliform are significantly reduced as the wastewater stream flows through the patented electrolytic “book” cell.
Stage 2: is composed of an electrocoagulation (EC) reactor, a gas-liquid separator (Degassing Column), and a solids-liquid separation tank (Settler). The EC reactor electrolytically enhances the sewage stream with iron particles that serve as nucleation sites forming a flocculation with the organic matter that readily drops out of solution. A defoaming agent is injected into the waste stream between the bookcell and the EC reactor to enhance gas-liquid separation of the stream exiting the EC reactor. Gas generated in both the book and electrocoagulation cells is removed in a degassing column mounted on top of the Primary Settler. A proprietary
design encourages disengagement of the entrained process gases from the stream which percolates gently into the Settler. An internal standpipe provides significant reaction time for solids to fall to the bottom of the settler. Liquid with minimal solids exits near the top of the Settler tank.
Stage 3: is a second settling (or clarification/concentration) step. The process stream enters De Nora Water Technologies’ (DNWT) unique clarifier tank where velocity is kept at a minimum to further encourage settling of any remaining flocculants to the bottom of the solids Concentrator. This results in a clear effluent from the top of the Concentrator that meets effluent composition requirements for MEPC 227(64). The solids from the Settler and Concentrator can be handled by the operator as a concentrated waste stream or further processed using DNWT’s patent-pending solids handling unit.
Treatment ProcessThe processing function of every OMNIPURE Series 55/64 unit is the same — regardless of size. The automatic three-stage treatment process for generating oxidant on-demand is simple and proven effective. Operation is 24/7, with continuous collection and treatment of the accumulated black and gray water.
EFFLUENT DISCHARGE TO SEA
COLLECTION
ATMOSPHERIC
PRIMARYSETTLER
CLARIFIER
RECIRCULATINGPUMP
TO HOLDING OR SOLIDS HANDLING SYSTEM
DECLORINATIONUNIT
FLOWSWITCH
FLOWTRANSMITTER
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Solids Handling FeaturesThe OMNIPURE Series 55/64 process does not require handling of waste solids from raw, untreated influent. Instead, concentrated treated solids are automatically removed from the treatment process. Optional solids handling processes are available to produce dry, dewatered solids that can be easily handled and disposed of. This is a unique feature only offered by the OMNIPURE process.
- STDN’s solid handling systems can be used to dewater the wet solids stream between 10% to 18% solids, making disposal of the dried materials easy, safe and sanitary.
- There is no physical handling of these solids. - Solids are disinfected by sodium hypochlorite and
other oxidizers produced by the OMNIPURE system, making subsequent handling easily managed by any number of collection means.
- Treatment via electrocoagulation technology causes Total Suspended Solids (TSS) particles to agglomerate and settle into concentration areas of the OMNIPURE process tanks.
- Solids are automatically removed by an automated valve sequence that does not disrupt or stop the OMNIPURE treatment process.
- The 1–2% waste solids are then routed to a customer’s holding tank or to one of DNWT’s optional solids handling systems.
Solids Handling Options De Nora Water Technologies offers two solids handling system options with the OMNIPURE process; a polymerization bagging unit or a centrifuge unit. Each option offers a convenient, sanitary method of solids capturing, handling and disposal. The two options are indicative of De Nora Water Technologies’ focused approach on Health & Safety for the operators of our OMNIPURE systems.
Sanitary removal of solids, in conjunction with ease of disposal, has always been the driving force behind the solids handling concepts employed with our technologies. The added benefit of utilizing one of the DNWT solids handling system options is that the product removed from these systems meets a Class ‘B’ sludge rating which makes disposal of the solids more acceptable in the offshore production environment.
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Bagging Unit OptionThe solids bagging system allows the wet solids to mix with a small amount of polymer and then be deposited in filter bags that can hold up to 15 kg (33 lbs) of 8 to 10 percent solids. Dirty or spent bags are easily removed and disposed of or incinerated. If allowed to dewater to a 10 percent concentration or higher, the waste from this method can be considered a Class ‘B’ sludge, which is safe for landfill disposal.
UTILITY AIRSUPPLY
CONTROLPANEL
BAGCHAMBERS
POLYMERPUMP
DRAINPUMP
LEVELSWITCH
MAINTENANCEPLATFORM
MIXSPOOL
SPENT BAGTO TRASH
POLYMERTANK
MIXER
FILTRATE TOOMNIPURE UNIT
WET SOLIDSFROM OMNIPURE
Bagging Unit Option
Centrifuge Unit OptionThe centrifuge system allows for automatic handling of wet solids and provides for dewatered solids that can be disposed of by traditional waste management methods. Also classified as a Class ‘B’ sludge, the dry solids are discharged into a container, drum or tote for easy disposal.
FILTRATE TOOMNIPURE UNIT
DRY SOLIDSCOLLECTION
CENTRIFUGEUNIT
SOLIDSBATCH
RECIRCULATIONPUMP
TANKWET SOLIDSFROM OMNIPURE
DRAINPUMP
UTILITY AIRSUPPLY
ATMOSPHERE
CONTROLPANEL
Centrifuge Unit Option
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OMNIPURE™ Series 55/64 Design Standards
Model 5503 / 6403
Model 5505 / 6405
Model 5508 / 6408
Model 5513 / 6413
Model 5528 / 6428
Model 5538 / 6438
Model 5556 / 6456
Model 5565 / 6465
Personnel Complement (Maximum)
Black Water Only (§) 30 55 83 138 288 388 569 665
Black & Gray Water (§) 10 18 27 46 95 128 187 219
Daily Treatment Ratings (Maximum) Total Volume (*)
(*) 100% Peak Capacity; STDN Recommends that actual operational capacities not exceed 90% of maximum capacity. Units should be sized based on daily Hydraulic Loading, not number of persons.
(**) Standard Unit does not include optional equipment arrangements.
(§) Personnel Complement provided for information only based on BV Cleanship recommendations of 98L/day (Blackwater only) and 295L/day (Blk/Gray Combined).
(†) Seawater requirement is at 100% duty cycle.
(‡) Plant air requirements are 100% duty cycle. Actual air usage is intermittent.
(¥) STDN Solids Handling System(s) available for safe and sanitary wet solids handling; permits 'Class B' Sludge handling for conventional disposal.
(^) Power Requirement indicates maximum load, worse case.
All Information subject to change.
De Nora Water Technologies 1110 Industrial Blvd, Sugar Land Texas 77478, United States
