Mainstream ANITA Mox Pilot Testing at Los Angeles County Joint Water Pollution Control Plant. Meg Hollowed Veolia Water Technologies
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1 Mainstream ANITA Mox Pilot Testing at Los Angeles County Joint Water Pollution Control Plant Meg Hollowed Veolia Water Technologies
2 Presentation Outline Background Sidestream vs. Mainstream Deammonification Agency and Facilities ANITA Mox Process LACSD Pilot Testing Activities Sidestream Testing at the JWPCP Mainstream Testing at the JWPCP Summary
3 Conventional Treatment Plants Mainstream Sidestream
4 Deammonification Similar to terms like nitrification or denitrification Nitrification Conversion of ammonia to nitrite or nitrate Bacteria called Ammonia or Nitrite Oxidizing Bacteria Denitrification Conversion of nitrate to nitrogen gas Heterotrophic denitrifying bacteria Deammonification Conversion of ammonia to nitrogen gas Bacteria required include Ammonia Oxidizing Bacteria and Anaerobic Ammonia Oxidizing Bacteria (Anammox)
5 LACSD Wastewater Treatment Facilities
6 Joint Water Pollution Control Plant Rated capacity: 400 MGD Ocean-discharge; no effluent nitrogen limits cbod removal only (HPOAS) N
7 Interest in Nitrogen Removal May need to meet more stringent effluent nitrogen levels Regulatory drivers Water reuse On-going program to evaluate nitrogen removal technologies
8 Districts Anammox Research Sidestream Anammox Enrichment (2003, ) Pilot-Scale DEMON, Whittier Narrows WRP ( ) Pilot-Scale ANITA Mox, JWPCP ( ) Pilot-Scale ANITA Mox, Valencia WRP (2014) Mainstream Pilot-Scale ANITA Mox, JWPCP ( )
9 Mainstream Testing: Research Questions Does this process work for JWPCP? How well does this process work? Effect of Feed C/N (bscod/nh 4 -N) How finicky is this process to operate? Is NOB competition an issue? Process robustness Study still in progress Results presented are preliminary
10 Veolia s ANITA Mox Process Biofilm-based system Retains slow-growing organisms (i.e., AnAOBs) Greater protection from shocks/toxicity Environment for both aerobic/anaerobic organisms High surface area/volume
11 Conventional Treatment Plants Existing mainstream process for carbon removal (i.e. High rate A/S)
12 Process Flow Diagram System retrofitted from IFAS Pilot
13 IFAS Pilot Layout Clarifier Reactor 40 Cargo Container
14 Feed Characteristics Parameters Unit Primary Effluent* Secondary Effluent Nitrogen TKN mg N/L NH 4 mg N/L Organic matter COD mg/l scod mg/l BOD mg/l TSS mg/l Alkalinity mg CaCO3/L July 2016 Data, Medians *Fresh
15 Mainstream ANITA Mox Operational Parameters for NOB Control Aeration DO Setpoint SRT Intermittent Aeration Sludge Wasting Rate
16 Test Phases Conducted To-Date Phase Date Range Target Feed C/N Type of Carbon Supplement Status Startup 5/26/17 7/11/17 Beverage Manufacturin g Waste Completed 1 7/12/17 9/11/17 ~ 0.5 Primary Effluent (Stored) Completed 2 9/12/17 11/21/17 ~ 1.0 Primary Effluent (Stored) Completed 3 11/22/17 12/15/17 ~ 0.75 Primary Effluent (Stored) Completed 4 12/21/17 now ~ 2.0 Primary Effluent (Fresh) In Progress
17 Ammonia Removal Performance Increase Feed C/N
18 Nitrogen Removal Performance Increase Feed C/N
19 Effect of Feed C/N Phase Date Range Feed C/N Effluent TIN (mgn/l) TN Removal Efficiency TN SARR (g/m2-d) 1 8/18/17~ 9/11/ % /9/17~ 10/25/ % 0.86 Increasing the Feed C/N (Phase 1 2) Reduced effluent TIN by ~6 mgn/l But also reduced the surface removal rate by ~20%
20 Sludge Settling Issues
21 Stability of Anammox Activity Batch Activity test No loss of activity after 8 months No need for augmentation
22 Operation with Selector and Fresh PE Substantial P removal P release pattern consistent with EBPR
23 Summary: Mainstream ANITA Mox Testing Process enables nitrogen removal from low C/N wastewater without carbon addition Performance Higher feed C/N appears to improve TIN removal efficiency, at the expense of removal rate. Sludge settling can be an issue, which seems to be somewhat alleviated by: Operating with an anaerobic selector Eliminating primary effluent storage Robustness Appears stable under mainstream conditions
24 Acknowledgements Project Team Erik Krikorian Tom Knapp Ken Smith Jim Barry Michael Liu Nikos Melitas JWPCP Operations Dave Frediani Sejal Patel JWPCP Laboratory Joe Khoury Julie Sebata Hong Zhao Mitch Johnson Samuel Liang Rich Dimassimo
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