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Y Tế - Sức Khỏe - Công Nghệ Thông Tin, it, phầm mềm, website, web, mobile app, trí tuệ nhân tạo, blockchain, AI, machine learning - Kỹ thuật ,DOCUNENT:NESUME ED 221 AUTHOW TITLE 397- INSTITUTION SPONS AGENCY PUS DATE GRANT ''''NOTE AVAILABLE FROM .:EDRSkRICE DESCRIPTORS IDENTIFIER. ABSTRACT SE 039 209 ,Carnegie, John W. Rise Time. Operational Control Tests for Wastewater Treatment Facilities. Instructor''''s Manual and Student Workbook. Linn-Benton Community Coll.,Albany, Oreg. Office of Water Program Operatons (EPA), Cincinnati,- Ohio. National Training and Operational Technology Center. )Jul 82 EPA-900953010 21p.; Sok related document, see SE 039 212. Linn-Benton CoMmunity College, 6500 S.W. Pacific Blvd., Albany, OR 97321 (1. student work)rok, 2. instructor''''s guide). MF01 Plus Postage. PC Not Available from EDRS. Instructional Materials; Laboratory Procedures; . Postsecondary Education; Sludge; Teaching Guides; Training Methods; Waste Water; Water Treatment Rise Time Test ^.1 The rise time test (along with the settleometer procedure) is used to monitor sludge behavior in the secOnciall clarifier of an activated sludge system. The test monitors the effect of the nitrificationdenitrificstinn Process ,and Aida the 0Peratot- in determining optimum clarifier sludge detentinnttime and, to some extent, optimum degree of .oxidation in aerition basin. Designed for individuals who have completed Nation -Pollutant Discharge Elimination System (NPDES) level 1 laborato training skills, this module provides waste water treatment plant operators with the basic skills and information needed to: (1) run and evaluate the test for'''' sludge rise time; (2) record data; and (3) describe how ,.nitrificationdenitrification affects sludge rise time. The instructor''''s manual contains a statement of instructional goals, lists of instructorstudent activities and instructional materials, and student worksheet (with answers). The student workbook contains objectives, prerequisite skills Apeded before the module is started, laboratory procedures, and worksheet. (AuthorJN) . , Reproductions supplied by EDRS, are the best that can be made -,. from the original document. '''' e. eratiOnalControliTests rWastewaterTreatmentFacilities A US.DEPARTMENTOFEDUCATION, NATIONALINSTITUTEOFEDUCATION 30EDUCATIONALRESOURCES.INFORMATION. CENTER(ERIC). IThisdocumenthasbeenweptocluce''''dori receivedItom.theperSonornolahltdodo, omenriturri MI001chanheShavebeimmadetoimmove reproductionqiii,11 PointsofsloVV:oropinion tete)mMrsdorm Meritdr)not-necessmily NIEr. Oositidrvorpolicy - "PERMISSIONTOREPRODUCETHIS MATERIALINMICROFICHE(ONLY HASBEENGRANTEDBY TOTHEEDUCATIZ5NiALAESOURCES INFORMATIONCENTER(ERIC).", Written By: John W. Carnegie, Linn-Benton Cothmuhity College AlbanY,J)regon-, Instructional Design: Priscilla Hardin Corvallis, Oregon P.roject Management: John W. Carnegie, Ph.D.,- linnBentori ComMunity C011ege Albany, Oregon Project Officer: Lynn S. Marshall United States Environmental Protection Agency .National Training and Operational Technology Centei- Cincinnati, Ohio Developed Under: EPA Grant 900953010 July, 1982 Subject Instructional Goals I:nstructor .Acti4ti.es StudentActiylties,..,, Instructional Materials Litt Reference: List AnsWers tO:Woricshee.t Student-Materials'''', 4 CONTENTS 7:Pkge Rt-1 Rt-1 Rt-2 Rt-2-, W7Rt-1 S-Rt-1 thru 8 WS-Rt-1 thru 2 Rt-i 762 INSTRUCTIONALGOALS Upon completion of this lesson the student hould be able to successfully run rise time tests and record the data. The student should also,be able to describe how.nitrificationdenitrification affects sludge rise time. Use this lesson in conjunction with the.lesson on the settleometer. INSTRUCTOR ACTIVITY For best results, follow this sequence: Activi,tY Review the objectives with the students. Have the students read through tile, procedure and supplementary material: LecturediscussiOv on procedurelh . . Demonstrate .settleOmeter equipment (Show selected-slides from settleometer:., lesson-if avatlable.) . Assign worksheet. 6. Correct worksheet. -2 minates 10,minutes 10 minutes 10 minute 5 minutes'''' 3 minutes Other Activities: 1) If sludge samples are available, set .up a settleometer in advance to demonstrate what a sludge sample looks like after rising. ) If students are capable, discuss chemistry of nitrificationdenitrification. TUDENTACiIVITIES 1. Read objectives. 2. Read procedure and supplementary material. 3. Listen to lecturedemonstration. . Complete worksheet. go- INSTRUCTIONAL:MATERIALALIST I. :Instructori Suide for Rise Time. 2. Student -Workbook for Rise-Time. 3. 35 mm projector and screen (if using settleometerslides). 4. Settleometer equipment for demonstration.- 5. SI udge- sampl e: REFERENCELIST) u.Wandbdok of Advamced Wastewater Treatm t", .2nd Edition, Culp-, Wesner, and,CPIP:VONostrand-,Reinhold197S, Chapt - . . "Chemistry. fOr Envfronmental .Engineering", 3rd Edition:, MCGraw-Hill-: .1978. Rt-2 of 2 182 WORKSHEET.- RISE TIME Directions: Place an "X" by the best answer(s).. There may be more than one correct response. I. Microorganisms in mixed liquor convert ammonia to nitrite and then to nitrate by a process called: a) fermentation. b) ''''denitrification. c) X nitrification. d) fertilization. e) clarification. Denitrification: a) ''''is\an aerobic process. b) x is an anaerobic process. ,c). X is a, reduction process. d) As an oxidation process. 3. Rising sludge in a secondary clarifier: . a) is always a hydraulilt problem. b) X could be caused by trapped nitrogen gas. x. contributes to poOr effluent. d) means sludge detention time is too short. r- W-Rt,1 Of 2 7 782 r . To run a rise time test: a) it is best to start over after running the settleOmeter test. put settled sludge in a beaker and gently bubble air in under the blanket; c) measure the volume of the blanket after it expands. d) X continue observing settled sludge until it rises. 5. The rise time for settled activated sludge: a) X ,could be as short as one hour.'''' b)., X could be as long as six hours. c) X could be longer than''''elht hours. d) is always 3 - 6 hours. 40. ICS W-R1-2 of. 2 -:782 perationalControlTests forWastewaterTreatmentFacilities RiseTime StudentWorkbook Linn-Benton fr CommunityCollege Albany,Oregon RISE TIME Written By: John W. Carnegie, Ph.D. Ling-Benton Community College Albany, Oregon Instructional Design: Priscilla Hardin Corvallis, Oregon Project Management: John W. Carnegie, Ph.D. Linn-Benton Community College Albany, Oregon Project Officer: Lynn S. Marshall United States EnviroriNental Protection Agency National Training and-Operational Techhology Center Cincinnati,.0hio Developed Under: EPA Grant 900953010 July, 1982 10 Sub''''ect IntroductiOn ,Objectives PrereqUittte Skills ResoUrce Litt'''' Test ProCedure SupplementarY Materials Test Data Sheet Sample Data Sheet Procedure Summary WOrktheet lii RISE TIME CONTENTS Page S-Rt-1 S=Rt-1 S4t-1 14t71 S-Rt-2 S-Rt-6 S-Rt-7 S-Rt-8 WS-Rt-1 1 S-Rt-i 782 , NINTRODUCTiON Thislessonon,-risetimeisintendedtobeusedinconjunction withthemodule,onthesettleometer. Itispresentedseparately ''''toenphasizetheuniquevalueofthetest. Thelessonisinten- dedtogivetheoperatortheskillstorunand,evaluatethetest forsludgerisetime. OBJECTIVES UponcompletionoftIzismoduleyoushouldbeablet: 1. Describethe,purposeoftherisetirne"test. .2. Describi"thetestprocedure. 3. Performthetestprocedure. PREREAUISITESKILLS Thismoduleisintendedtobeusedbyindividualskdho''''havecom- pletedtheNPDESLevelIlaboratoryskillstraining. Inaddition, youshouldbefamiliarwiththesettleometerprocedureandthe prerequisiteskillslistedwithth''''atmodule. RESOURCELIST \ Settleometersmaybepurchasedfrom: 1. ArthurH.ThomasCo. NalgeneSettleometer sVineStreetat3rd andCentrifugeKit P.O.Box779 9857-V25 Philadelphia,PA19105 a 2. ''''SGAScientific,Inc. 735BroadStreet,, Bloomfield;NJ,07003 12. S -Rt -1 of 8 JS-1035 Settleometer 2liter Doublegrad. 782 INTRODUCTION The microorganisms in the activated sludgeproce s that help form the flop in mixed liquor are mostly aerobic a d facul- tative organisms. Inthe aeration basin where oxygen is plentiful, they metabolize aerobically. Under certain aerobic cond tions, ammonia is oxidiied to nitrite and then to nitrate by the microor- ganisms. This process is called nitrification. When the mixed liquor enters the secondary clarifier it settles in an oxy en deficient environment. Under these.anaerobic conditions f cul- tative microorganisms reduce the nitrate formed earlier to itrite and then to nitrogenigas. ''''This process is called denitrific tfon. Nitrogen gas S-eleasedduring denitrification can become trapped in the settling floc and cause it to float to the sur ce degrading effluent quality. Mixed liquor in a settleometer will also denitrify and eventually the''''settled blanket in the settle- ometer will rise to the top. The time at which this occurs gi...
,DOCUNENT:NESUME ED 221 397- SE 039 209 AUTHOW ,Carnegie, John W TITLE Rise Time Operational Control Tests for Wastewater Treatment Facilities Instructor's Manual [and] INSTITUTION Student Workbook SPONS AGENCY Linn-Benton Community Coll.,Albany, Oreg Office of Water Program Operat*ons (EPA), Cincinnati,- PUS DATE Ohio National Training and Operational Technology GRANT Center 'NOTE )Jul 82 AVAILABLE FROM EPA-900953010 21p.; Sok related document, see SE 039 212 Linn-Benton CoMmunity College, 6500 S.W Pacific Blvd., Albany, OR 97321 ($1 student work)rok, $2 instructor's guide) .:EDRSkRICE MF01 Plus Postage PC Not Available from EDRS DESCRIPTORS Instructional Materials; *Laboratory Procedures; Postsecondary Education; *Sludge; Teaching Guides; IDENTIFIER *Training Methods; *Waste Water; *Water Treatment Rise Time Test ^.1 ABSTRACT The rise time test (along with the settleometer procedure) is used to monitor sludge behavior in the secOnciall clarifier of an activated sludge system The test monitors the effect of the nitrification/denitrificstinn Process ,and Aida the 0Peratot- in determining optimum clarifier sludge detentinnttime and, to some extent, optimum degree of oxidation in aerition basin Designed for individuals who have completed Nation -Pollutant Discharge Elimination System (NPDES) level 1 laborato training skills, this module provides waste water treatment plant operators with the basic skills and information needed to: (1) run and evaluate the test for' sludge rise time; (2) record data; and (3) describe how ,.nitrification/denitrification affects sludge rise time The instructor's manual contains a statement of instructional goals, lists of instructor/student activities and instructional materials, and student worksheet (with answers) The student workbook contains objectives, prerequisite skills Apeded before the module is started, laboratory procedures, and worksheet (Author/JN) , * Reproductions supplied by EDRS, are the best that can be made *_-, * from the original document *' ***********************************e************************.*********** eratiOnal ControliTests r Wastewater Treatment Facilities A US DEPARTMENT OF EDUCATION , NATIONAL INSTITUTE OF EDUCATION I30 EDUCATIONAL RESOURCES INFORMATION CENTER (ERIC) This document has been wept ocluce'd ori received Itom the perSon or nolahltdodo, omenriturri MI001 chanheS have beim made to immove reproduction qiii,11 Points of sloVV:or opinion tete!) m Mrs dorm Merit dr) not- necessmily NIEr Oositidrvor policy - "PERMISSION TO REPRODUCE THIS MATERIAL IN MICROFICHE (ONLY HAS BEEN GRANTED BY TO THE EDUCATIZ5NiALAESOURCES INFORMATION CENTER (ERIC)." , Written By: John W Carnegie, Linn-Benton Cothmuhity College AlbanY,J)regon-, Instructional Design: Priscilla Hardin Corvallis, Oregon P.roject Management: John W Carnegie, Ph.D.,- linnBentori ComMunity C011ege Albany, Oregon Project Officer: Lynn S Marshall United States Environmental Protection Agency National Training and Operational Technology Centei- Cincinnati, Ohio Developed Under: EPA Grant #900953010 July, 1982 4 7:Pkge Rt-1 CONTENTS Rt-1 Subject Rt-2 Instructional Goals Rt-2-, I:nstructor Acti4ti.es W7Rt-1 StudentActiylties, ,, S-Rt-1 thru 8 Instructional Materials Litt WS-Rt-1 thru 2 Reference: List AnsWers tO:Woricshee.t Student-Materials', Rt-i 7/62 INSTRUCTIONAL GOALS Upon completion of this lesson the student %hould be able to successfully run rise time tests and record the data The student should also,be able to describe how.nitrification/denitrification affects sludge rise time Use this lesson in conjunction with the.lesson on the settleometer INSTRUCTOR ACTIVITY For best results, follow this sequence: Activi,tY Review the objectives with the students -2 minates 10,minutes Have the students read through tile, 10 minutes procedure and supplementary material: 10 minute§ Lecture/discussiOv on procedurelh 5 minutes ' 3 minutes Demonstrate settleOmeter equipment (Show selected-slides from settleometer:., lesson-if avatlable.) Assign worksheet 6 Correct worksheet Other Activities: 1) If sludge samples are available, set up a settleometer in advance to demonstrate what a sludge sample looks like after rising ) If students are capable, discuss chemistry of nitrification/denitrification TUDENT ACiIVITIES 1 Read objectives 2 Read procedure and supplementary material 3 Listen to lecture/demonstration Complete worksheet go- INSTRUCTIONAL:MATERIALA LIST I :Instructor!i Suide for Rise Time 2 Student -Workbook for Rise-Time 3 35 mm projector and screen (if using settleometerslides) 4 Settleometer equipment for demonstration.- 5 SI udge- sampl e: REFERENCE LIST_ ) u.Wandbdok of Advamced Wastewater Treatm t", 2nd Edition, Culp-, Wesner, and,CPIP:VONostrand-,Reinhold197S, Chapt - "Chemistry fOr Envfronmental Engineering" , 3rd Edition:, MCGraw-Hill-: 1978 Rt-2 of 2 1/82 RISE TIME WORKSHEET.- Directions: Place an "X" by the best answer(s) There may be more than one correct response I Microorganisms in mixed liquor convert ammonia to nitrite and then to nitrate by a process called: a) fermentation b) 'denitrification c) X nitrification d) fertilization e) clarification Denitrification: a) 'is\an aerobic process b) x is an anaerobic process ,c) X is a, reduction process d) As an oxidation process 3 Rising sludge in a secondary clarifier: a) is always a hydraulilt problem b) X could be caused by trapped nitrogen gas x contributes to poOr effluent d) means sludge detention time is too short 7 7/82 r- W-Rt,1 Of 2 To run a rise time test: a) it is best to start over after running the settleOmeter test put settled sludge in a beaker and gently bubble air in under the blanket; c) measure the volume of the blanket after it expands * d) X continue observing settled sludge until it rises 5 The rise time for settled activated sludge: a) X ,could be as short as one hour.' b)., X could be as long as six hours c) X could be longer than'elht hours d)_ is always 3 - 6 hours ICS r 40 W-R1-2 of 2 -:7/82 perational Control Tests for Wastewater Treatment Facilities Rise Time Student Workbook fr Linn-Benton Community College Albany, Oregon RISE TIME Written By: John W Carnegie, Ph.D Ling-Benton Community College Albany, Oregon Instructional Design: Priscilla Hardin Corvallis, Oregon Project Management: John W Carnegie, Ph.D Linn-Benton Community College Albany, Oregon Project Officer: Lynn S Marshall United States EnviroriNental Protection Agency National Training and-Operational Techhology Center Cincinnati,.0hio Developed Under: EPA Grant #900953010 July, 1982 10 RISE TIME Page CONTENTS S-Rt-1 S=Rt-1 Sub'ect IntroductiOn S4t-1 ,Objectives 14t71 PrereqUittte Skills ResoUrce Litt' S-Rt-2 Test ProCedure SupplementarY Materials S-Rt-6 Test Data Sheet S-Rt-7 Sample Data Sheet S-Rt-8 Procedure Summary WS-Rt-1 WOrktheet 1 lii 7/82 S-Rt-i , NINTRODUCTiON This lesson on,-rise time is intended to be used in conjunction with the module, on the settleometer It is presented separately 'to enphasize the unique value of the test The lesson is inten- ded to give the operator the skills to run and ,evaluate the test for sludge rise time OBJECTIVES Upon completion of tIzis module you should be able t : 1 Describe the,purpose of the rise tirne" test .2 Describi"the test procedure 3 Perform the test procedure PREREAUISITE SKILLS This module is intended to be used by individuals_kdho 'have com- pleted the NPDES Level I laboratory skills training In addition, you should be familiar with the settleometer procedure and the prerequisite skills listed with th'at module RESOURCE LIST \ Settleometers may be purchased from: 1 Arthur H Thomas Co Nalgene Settleometer and Centrifuge Kit s Vine Street at 3rd #9857-V25 P.O Box 779 Philadelphia, PA 19105 2 'SGA Scientific, Inc J S - 1035 Settleometer 735 Broad Street,, Bloomfield; NJ, 07003 2 liter Double grad a 12 7/82 S -Rt -1 of 8 INTRODUCTION The microorganisms in the activated sludge proce s that help form the flop in !mixed liquor are mostly aerobic a d facul- tative organisms Inthe aeration basin where oxygen is plentiful, they metabolize aerobically Under certain aerobic cond tions, ammonia is oxidiied to nitrite and then to nitrate by the microor- ganisms This process is called nitrification When the mixed liquor enters the secondary clarifier it settles in an oxy en deficient environment Under these.anaerobic conditions f cul- tative microorganisms reduce the nitrate formed earlier to itrite and then to nitrogenigas 'This process is called denitrific tfon Nitrogen gas S-eleased_during denitrification can become trapped in the settling floc and cause it to float to the sur ce degrading effluent quality Mixed liquor in a settleometer will also denitrify and eventually the'settled blanket in the settle- ometer will rise to the top The time at which this occurs gives an estimate of nitrification/denitrificatiOn activity and how long s,ludge can safely be detained in the clarifier EQUIPMENT7 Settleometer - 2 liter Mallony Direct Reading SGA Scientific, Inc Catalog CS-1035, or Nalgene Catalog #1010 Stirring paddle Timer (Electric Gralab, Model 500 or equivalent) PROCEDURE 1 RUN,SETTLEOMETER TEST Refer to the lesson on settleometer tests tóllect sample and observe sett- ling as indicated Do not discard sample after observing sett-1111g 2 CONTINUE TIMING, Continue timing the settling from the original zero time far the settleometer test OBSERVE SLUDGE BLANKET Watch for the blanket to rise to the ' surface or flip over and float to the top 4 3 S-Rt-2- of 8 7/0? 0 12.2 4 RECORD RISE TIME Record rise time on settleometer data sheet The rise time may take only one hour or it ma y not nise in eight hours or more 'Typically, rise times are 3 - 6 'hours DISCARD SAMPLE AND CLEAN SETTLEOMETER INTERPRETATION The,rise time test, along with the normal settleometersprocedure, is used to monitor,sludge behavior in the secondary clarifier of gh activated ,sludge system The rise time test specifically'san monitor the effect of the nitrification/denitrification process and,,can aid the, operator in determining optimum clarifier sludge detention time and, to some extent, optimum degree of oxidation.in the aeration basin .0, 0 -) Nitrification occurs in the aeration basin:and results in the formation of nit,,stes in the sludge going to the secondary clarifier Nitrification occiirs in all plants to some degree: Any plant having amonia nitrogen levels of 2.5 mg/1 or higher.in the raw influent can expect significih nitrification if conditions are appropriate The temperature, pH,''and dissolved oxygen level in the aeration basin all .inMence nitrification The warmer the activated sludge, the mbre nitrification,will occur Optimum pH for nitrification 'is about 8.5 Twice as,much nitrification can-be expected at a ILO of' 2.0 mg/1 as would occur at a D.P of 0.5 mg/l The anaerobic denitrification: process occurs in the clarifier sludge blanket as the sludgeloses its D.O and becomes anaerobic As the,sludge becomes anaerobic the nitrogen gas released during denitrification is trapped in the sludge particles causing the sludge to rise to the top in clumps,and deteriorating effluent ,quality How quickly this occurs depends on the D.O content of the sludge and the degree of nitrification that took place in the aeration basin The rise" time test measures how quickly the sludge can be ex- pected to rise Rise times might vary from one hour to six hours Some sludges may never rise Normally oxidized, domestic sewage could' be expected.to rise in three to four hours The operator should calculate the sludge detention time for the A 4.secondary clarifier and compare that to the rise time If the rise time is less than the detention time,' rising sludge problems can be expected Sludge detention time should be decreased by removing sludge from the Clarifier faster, Nitrification Can also be influenced by 'adjusting D.O in the aeration basin However, be cautious of upsetting otherwise'good quality sludge production S-Rt-3 of 8 7/8Z SUPPLEMENTARY MATERIAL The purpose of the settleometer test is to indicate the solids-liquid 'separation capability of the sludge The test is commonly used to make this determination on activated sludge entering the secondary clarifier and aerobic digesters, to de- termine downtime of the sludge EQUIPMENT' Settleometer - 2 liter Mallory Direct Reading S1A Scfentific, Inc Catalog #JS-1035, or Nalgene Catalog #1010 Stirring paddle Timer (Electric Gralab, Model 500 or equivalent) COLLECT SAMPLE Collect at least 2.5 liters of sample and deliver to ihe lab within 15,minutes c After the sample has been collected, it should be thoroughly but gently mixed and poured into the settleometer without delay POUR SAMPLE INTO SETTLEOMETER Fill the settleometer to the 1000 cc mark Al- though the settleometer actually holds 2 liters, it is calibrated from 0 - 1000 cc STIR SAMPLE Slowly stir the sample in the settleometer with a paddle to insure that it is completely mixed Then, use the paddle to stop the swirling motion of the liquid, slowly and carefully remove the paddle and start timing Pieces of plexaglass the appropriate length make excellent stirring-paddles These pieces should be slightly less in width than the inside diameter of the settleometer 15 S-Rt-4 of 8 7/82 READ SETtEOMETER For Activated Sludge After 5 minutes have elapsed, read the sludge 'Olanket.level, (the interface between the solids And' the clear liquid above' the solids) in ccil 444nd recPv144tit$ reading -=.Rea4:1'.at five-Min4A0 Intervals'-until 30 mfnutes have elapsed:- 01:Wing the next 30 minutes, read at 10 minute intervals Reodings would be made at 5,10, 15, 20, 25, 30 50, and, 60 minutes The sludge blanket level :readings taken at these,iimes are readings of, the' volume of settled sludge in cc/1% RECORD DATA Recoed values of data, appearance of supernatant, apPearance of sludge and of the sludge supernatant interface For Aerobic Digesters Read and'record the sludje blanket level in cc/l affer 15 minutes, 30 minutes, and 1 hour, then once per hour until the Sludge reaches ultimate compaction or rises Determine the time and level of ultimate compaction, and then the rise time of the sludge WASH SETTLEOMETER After ,the last r4ading hat beenaken the settle- ometer shoUld be washed with soapy water, rinsed with tap water, and dried with a towel or allowed to drip dry 4§ETTLEOMETER DATA Activated Sludge a Observations: Sample location Floc Analyst flocculent Time of Test [ I dispersed SSC.= (ATC) (1000) Interface SSV Time SSV SSC I well defined cc/1 [ I ragged 0 7 1Q00 10 Supernatant 15 clear 20 [ I turbid 25 [ I pin floc 30 [ I straggler floc 40 50 Comments: (odor, color, etc.) ' Rise Time hrc Date- Observations: ample locatiilin Floc Analyst J flocculent Time of Test [ I dispersed SSC + (AT,c) (1000) I nter face ssv [I well defined Tinie SSv SSC cc/1 [ 1000,, SuPernatant 10' [ ) clear 15 [ I turbid 20 4' [ pin floc 25 f I straggler 'floc 30 Comments: (odorc color, ete.) 40 50 Rise TiMe ht-c, S-Rt-6 of , 1 7 7/82 SAMPLE DATA SHEET AERAT4ON BASIN #1 SETTLEOMETER DATA OBSERVE DURING Activated Sludge FIRST 5 MINUTES Date SAS Observations: Sample location 4.60.114, Floc Analyst .S: 4 leflecculant Tire, of Test /61./;"a f I dispersed SSC (A.C) (1000) Inter face SSV f ewell defined Time SSV SSC cc/1 f ) ragged, 1000 Supernatant AFTER 1 'HOUR f I clear 5 ft/turbid , 10 1/00 7.5 15 125 211 290 25 200 1.1 pin floc 30 2 00 ',straggler floc 40 210 Comments: (odor, color, etc.) 50 400 GO 200 Rise Time Observations: Date ample lo on SETTLED SLUDGE SETTLED SLUDGE TOTAL TIME UNTIL VOLUME CALCULATION SLUDGE ROSE 5 red 10 ragged is Supernatant 20 25 ( I clear 30 40 f I turbid 50 f I pin floc GO I straggler floc Comments : (odor,lcolor, etc ) Rise Time bri S-Rt-7 qf 8 '18 7/82 PROCEDURE SUMMARY PROCEDURE AEROB'IC DIGESTOR 1 Read at 15 and 30 1 Collect 2 5.liters sample 2 Deliver to lab within 15 min minutes 3 Mix sample 2 Read rise time 4 Pour 3 liters into settleometer Settleometer 5 Stir ' 6 Stop Motion of sludge ACTIVATED SLUDGE 1 Read every 5 minutes for first 30 minutes and every 10 minutes- for next 30 minutes 2 Read rise time The abOveproceOure summary is designed as a 4poratOY 41(17- tt may be cut out and attached tO a 5" X 7" Wei: card for'convenlight reference at the laboratory bench To protect the card you may wish to cover it, front and back;'With clear, Self-adhesive shelf paper er similar izlear material 1.3 S-Rt-8 of 8 7/82 RISE TIME WORKSHEET Directions: Plade an 'T by the-best answer(s) There may be mtre.than:one correct response 1 Microorganisms in mixed liquor convert ammonia to nitrite and then to nitrate by a process called: a) fenmentation b) denitrification c) nitrification d) fertilization e) clarification 2 Denitrification: a) is an aerobic process b) is an anaerobic process c) is a reduction process d) is an oxidation process 3 Rising sludge in a secondary clarifier: a) is always a hydraulic problem could be caused by trapped nitrogen gas c) contributes to poor effluent d) rans sludge detention time is too short 2kJ 7/82 WS-Rt1 of 2