ARMY UFGS-46 66 56-2011 OPEN-CHANNEL DISINFECTION EQUIPMENT.pdf

1、*USACE / NAVFAC / AFCESA / NASA UFGS-46 66 56 (February 2011)-Preparing Activity: USACE SupersedingUFGS-44 44 73 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated April 2011*SECTION TABLE OF CONTENTSDIVISION 46 - WATER AND WASTEWATER EQUIPMENTSECTION 46 6

2、6 56OPEN-CHANNEL DISINFECTION EQUIPMENT02/11PART 1 GENERAL1.1 REFERENCES1.2 SYSTEM DESCRIPTION1.2.1 Operation of Existing Facility1.2.2 Design Conditions1.2.3 Performance Requirements1.2.3.1 Inactivation1.2.3.2 UV Dose1.2.3.3 Nominal Average Intensity1.2.3.4 UV Density1.2.3.5 Retention Time1.2.3.6 P

3、lug Flow1.2.3.7 Dispersion1.2.3.8 Turbulence1.2.3.9 Channel Volume1.2.3.10 Headloss1.2.3.11 Cross Sectional Area1.2.3.12 Aspect Ratio1.3 SUBMITTALS1.4 QUALITY ASSURANCE1.4.1 Contractor Qualifications1.4.2 Manufacturers Qualifications1.4.3 Equipment Parts1.4.4 System Performance1.5 PRECONSTRUCTION CO

4、NFERENCE1.6 DELIVERY, STORAGE, AND HANDLING1.7 EXTRA MATERIALSPART 2 PRODUCTS2.1 MATERIALS2.1.1 Standard Products2.1.2 Nameplates2.2 EQUIPMENT2.2.1 LayoutSECTION 46 66 56 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2.2.2 Equipment Construct

5、ion2.2.2.1 UV Lamp Module2.2.2.2 UV Lamps2.2.2.3 UV Lamp Sleeve2.2.2.4 Lamp End Seal and Lamp Holder2.2.2.5 UV Lamp Module Support Rack2.2.3 Lamp Array Configuration2.2.4 Water Level Control2.3 ELECTRICAL2.3.1 Parameters2.3.2 Interconnect Cables2.3.3 Connectors and Receptors2.3.4 Ballasts2.3.5 Cable

6、way2.3.6 Instrumentation and System Controls2.3.6.1 Controls2.3.6.2 Lamp Status Indicators2.3.6.3 UV Intensity Detection System2.3.6.4 Minor Alarms2.3.6.5 Major Alarms2.3.6.6 Flow Pacing2.4 CLEANING SYSTEM2.4.1 General Requirements2.4.2 Cleaning Tank2.4.3 Cleaning Rack2.4.4 Cleaning Fluid2.5 PAINTIN

7、G2.6 ANCHOR BOLTSPART 3 EXECUTION3.1 EXAMINATION3.2 INSTALLATION3.3 FRAMED INSTRUCTIONS3.4 FIELD QUALITY CONTROL3.4.1 Operating Test3.4.2 Performance Testing3.5 MANUFACTURERS FIELD SERVICES3.5.1 Manufacturers Representative3.5.2 Site Visits3.6 ADJUSTING AND CLEANING3.7 Field Training3.7.1 Instructio

8、n Plan3.7.2 Training Outline- End of Section Table of Contents -SECTION 46 66 56 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-46 66 56 (February 2011)-Preparing Activity: USACE SupersedingUFGS-44 44 73 (A

9、pril 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated April 2011*SECTION 46 66 56OPEN-CHANNEL DISINFECTION EQUIPMENT02/11*NOTE: This guide specification covers the requirements for ultraviolet (UV) disinfection equipment for treatment of wastewater.Adhere to UF

10、C 1-300-02 Unified Facilities Guide Specifications (UFGS) Format Standard when editing this guide specification or preparing new project specification sections. Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicab

11、le items(s) or insert appropriate information.Remove information and requirements not required in respective project, whether or not brackets are present.Comments, suggestions and recommended changes for this guide specification are welcome and should be submitted as a Criteria Change Request (CCR).

12、*PART 1 GENERAL*NOTE: This specification should be used to allow the Contractor to install proven “off-the-shelf“ units supplied by reputable vendors. This guide specification includes technical requirements for ultraviolet disinfection equipment and controls. This specification will not be used for

13、 disinfection of water or industrial wastes.*1.1 REFERENCES*NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to in SECTION 46 66 56 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without lice

14、nse from IHS-,-,-the text by basic designation only and listed in this paragraph by organization, designation, date, and title.Use the Reference Wizards Check Reference feature when you add a RID outside of the Sections Reference Article to automatically place the reference in the Reference Article.

15、 Also use the Reference Wizards Check Reference feature to update the issue dates.References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process.*The publications listed below form a pa

16、rt of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)ANSI C82.4 (2002) American National Standard for Ballasts for High-Intensity-Discharge and Low-Pressure Sodium (LPS) L

17、amps (Multiple-Supply Type)NEMA 250 (2008) Enclosures for Electrical Equipment (1000 Volts Maximum)NEMA ICS 1 (2000; R 2005; R 2008) Standard for Industrial Control and Systems: General RequirementsNATIONAL FIRE PROTECTION ASSOCIATION (NFPA)NFPA 70 (2011) National Electrical CodeU.S. ENVIRONMENTAL P

18、ROTECTION AGENCY (EPA)EPA 625/1-86/021 (1986) Design Manual: Municipal Wastewater Disinfection1.2 SYSTEM DESCRIPTIONProvide an ultraviolet (UV) disinfection system complete and operational with controls and accessories as shown and as specified. Provide equipment suitable for outdoor open channel, g

19、ravity flow installation including, but not limited to, the following components, and appurtenances necessary for the interconnection of components, in the quantities required:(1) UV lamp module with support rack and bracket.(2) UV system instrumentation, controls, and power distribution.(3) Wireway

20、 and interconnecting cables.(4) Water level control device.(5) UV intensity monitoring system.(6) Elapsed time meter.(7) Cleaning system.SECTION 46 66 56 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(8) Spare parts.1.2.1 Operation of Existin

21、g Facility*NOTE: Include the following paragraph only where UV disinfection system is replacing another disinfection system at the existing wastewater treatment plant.*Maintain the continuous flow of wastewater and disinfection until the new system is tested, approved and fully operational. No disch

22、arge of untreated wastewater, reduction in existing hydraulic capacity or organic treatment capacity will be allowed.1.2.2 Design Conditions*NOTE: Determine or estimate plant flows, total suspended solids (TSS), UV transmittance, and influent microorganism count. A value for UV transmittance must be

23、 determined from an independent laboratory. Occasionally, a wastewater quality may be encountered which exceeds the experience of design engineers (e.g. due to an unfamiliar process design, a familiar but poorly operated process, an under-designed plant, an unusual influent to the treatment plant, e

24、tc.). In these cases, a pilot study should be conducted to provide information required for design. Channels must be designed for peak design flow.*Ultraviolet equipment shall disinfect wastewater effluent with the following characteristics:a. Peak flow, cubic meter per sec. (Mgd): Initial _.Design

25、_.b. Average flow, cu. meter/sec. (Mgd): Initial _.Design _.c. Minimum flow, cu. meter/sec. (Mgd): _.d. Total suspended solids (TSS), mg/L: _.e. Average turbidity, NTU: _.f. UV transmittance 253.7 nanometers (nm), through a 1 cm cell: _.g. Influent fecal coliform_, MPN/100 mL: _.1.2.3 Performance Re

26、quirements*NOTE: Typical values for nominal average intensity, UV density and theoretical retention time are 5100 SECTION 46 66 56 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-microwatts per square cm, 3.35 watts per liter, and 7 seconds, re

27、spectively. Nominal average intensity will vary between manufacturers. Density depends upon the design of the particular UV system and the number of lamp banks. Retention time depends upon the channel geometry and number of lamp banks. Insert values per specified equipment manufacturers calculations

28、.*1.2.3.1 Inactivation*NOTE: Predominate effluent criteria used in performance requirements for UV systems is for whole body contact: 200 most probable number (MPN)/100 ml of fecal coliforms, with a maximum 7-day average of 400 MPN/100 ml. Some states have different microbe and disinfection standard

29、s; therefore, determine the site specific disinfection requirements from the state permitting authority.*Provide a system capable of reducing the influent fecal coliform _ count to 200 MPN/100 mL _ on a 30 day geometric mean of daily samples.1.2.3.2 UV Dose*NOTE: Conventional units for UV dosage are

30、 microwatt-seconds per square cm. The standard dosage of UV radiation is determined by the effluent; unfiltered effluent may require a 30,000 dosage while a dosage of 16,000 to 20,000 is more typical of filtered effluent to achieve a disinfection safety factor of 2.0. Insert value per equipment manu

31、facturers recommendation.*The UV dosage shall be not less than _ microwatt-seconds per square cm based on peak design flow conditions, lamp output at 65 percent of its initial level after 1 year (8750 hours) of lamp operation without fouling on the lamp sleeves, and minimum UV transmittance as state

32、d in paragraph Design Conditions.1.2.3.3 Nominal Average IntensityThe nominal average intensity within the channel shall be not less than _ microwatts per square cm at a transmittance of 70 percent after 100 hour burn-in of lamps and with no fouling on the lamp sleeves.1.2.3.4 UV DensityThe UV densi

33、ty of the channel shall be not less than _ watts/liter.1.2.3.5 Retention TimeThe actual retention time (t) of the effluent within the system determined SECTION 46 66 56 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-by hydraulic analysis shall

34、 be not less than 0.9 times the theoretical retention time (T). The theoretical retention time (T) shall be not less than _ seconds at the peak design flowrate.1.2.3.6 Plug FlowThe flow characteristics through the system shall closely simulate ideal plug flow conditions under the full operating flow

35、 range. The Morrill Dispersion Index, defined as the time required for 90 percent of the salt and dye traces to pass, divided by the time required for 10 percent to pass, shall be less than 2.0. The ratio of the time required for 50 percent of tracer to pass to the mean residence time shall have a v

36、alue between 0.9 and 1.1. The ratio of the time of initial tracer appearance to the theoretical residence time shall have a value greater than 0.5.1.2.3.7 DispersionThe dispersion coefficient, which accounts for the deviation of the channels hydraulic behavior from that of perfect plug flow, shall b

37、e less than 100 square cm per second. The dispersion number (ratio of the dispersion coefficient to the product of flow velocity and channel length) shall be less than 0.l.1.2.3.8 TurbulenceFlow through the system shall be turbulent with a Reynolds Number greater than 4,000 at average flow.1.2.3.9 C

38、hannel VolumeFull use shall be made of the channel volume throughout the flow range. The ratio of the mean residence time (theta) to theoretical residence time (T) shall be greater than 0.9.1.2.3.10 HeadlossThe headloss caused by each bank of horizontal lamp modules shall be such that at the peak fl

39、ow rate no lamp is exposed to the atmosphere and the maximum depth over the uppermost lamp sleeves is 40 mm 1.5 inch. The headloss through vertical lamp banks shall not exceed 150 mm 6 inch.1.2.3.11 Cross Sectional AreaThe cross-sectional area occupied by the lamp module frame at the entrance and ex

40、it of each bank shall be no greater than 35 percent of the cross-sectional area occupied by the effluent in the channel.1.2.3.12 Aspect RatioThe system shall have a minimum aspect ratio (ratio of channel length to hydraulic radius) of 15 per lamp bank.1.3 SUBMITTALS*NOTE: Review submittal descriptio

41、n (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to reflect only the submittals required for the project. Submittals should be kept SECTION 46 66 56 Page 7Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-to the m

42、inimum required for adequate quality control.A “G” following a submittal item indicates that the submittal requires Government approval. Some submittals are already marked with a “G”. Only delete an existing “G” if the submittal item is not complex and can be reviewed through the Contractors Quality

43、 Control system. Only add a “G” if the submittal is sufficiently important or complex in context of the project.For submittals requiring Government approval on Army projects, a code of up to three characters within the submittal tags may be used following the “G“ designation to indicate the approving authori