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Water and Wastewater Technician WWWT 1191 Work Experience 2015 Timothy Neufeld [email protected] om

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Post on 15-Feb-2017




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Page 1: NAIT 2015 WE

Water and Wastewater Technician

WWWT 1191

Work Experience 2015Timothy Neufeld

[email protected]

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Water and Wastewater Treatment

Distribution / Collection

Solid Waste

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PRACTICUMStudent shadows an experienced

operator of the water plant and wastewater plant. Gradually the student takes over more and more of an operator’s routine duties until by the end of the summer the student is fully operating the plants under normal conditions, though still under supervision of the training operator

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Unusual situation of a water treatment plant and a wastewater treatment plant both on the same site. Operators operate both plants simultaneously

Wastewater plant is a Level IV plantWater plant is a Level III plant, soon to be

reassessed as a Level IV plant

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There are approximately 20 operators operating the two plants, 4 of which have Level 4 in both Water and Wastewater Treatment

Aquatera produces around 30 MLD of potable water and treats around 25 MLD of wastewater

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Water is drawn from the Wapiti River into storage ponds. From wells in the low lift pumphouse water is brought up to the plant where Polyaluminium Chloride (PACl) is injected as coagulant and Polymer is added as flocculent aid

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Water moves through 3 flocculation tanks and continues on to sedimentation and tube settling tanks

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PACl is added again pre filtering as a filter aid.


Filters are dual media, 1.6 m anthracite above .5 m quartz sand

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Chlorine, Cl2 from tonners, is injected prior to the filters as well as the clearwell. Chlorine is further added at various booster stations in and around Grande Prairie using calcium hypochlorite pucks


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Water Plant DAF

Filter backwash water and sedimentation tank sludge is pumped to Dissolved Air Flotation (DAF) tank

Scum goes to centrifuge and subnatant to wastewater plant

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WWTPprocessActivated Sludge

Biological Nutrient Removal (ASBNR)

Activated Sludge is the biological treatment of wastewater using a

population of microorganisms suspended in water

BNR is a sub process of the above, essentially the biological removal of

Nitrogen and Phosphorus from wastewater

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Raw wastewater is lifted with screw pumps up to the headworks, where it passes through a vortex (grit goes to landfill), through step screen (rags etc. to landfill), flowing into…

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primary clarifiers where sludge settles (pumped to the WW Dissolved Air Flotation (DAF) tank), and the supernatant flows into the…

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ASBNR bioreactors


where it mixes with high concentrations of bacteria. This mixed liquor then passes through the various anaerobic, anoxic, and aerobic zones that make up the bioreactors. It is in the ASBNR bioreactors where the bacteria do the majority of their work. Mixed liquor then goes onto the…

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where the bacteria rich activated sludge settles out and the supernatent becomes the finished plant effluent, returning to the Wapiti River

Secondary clarifiers

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Most of activated sludge (bacteria) is returned (RAS) to the head of the ASBNRs, with any excess wasted (WAS) to the WW DAF (Dissolved Air Flotation)

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WW DAF receives primary clarifier sludge as well as WAS from secondary clarifierSubnatent of DAF is sent to head of ASBNRs. Scum is pumped to Autothermal Thermophilic Aerobic Digestion (ATAD) tanks

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ATADs (aerobic digesters)


Everything that cannot be digested is sent to centrifuges, with the solids going to landfill and the centrate sent to head of the ASBNR bioreactors

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Operators run both plants at the same time 24 hours a day, on 12 hour shifts. Operators also work weeks of 8 hour days consisting mostly of preventative maintenance duties. Work orders include the plants as well as booster stations, pumphouses, and reservoirs in and around Grande Prairie


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SCADA screens are used to observe and adjust process, check for problems, and respond to alarms OPERATING

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Operators do several walk throughs every shift checking equipment and process, and

making adjustments as necessary


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During walk throughs operators record data, take measurements, clean and calibrate various metering equipment, collect samples

for lab work…


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Lab TestingWater

6x daily: chlorine, turbidity of potable,

filter influent, and raw2x daily: pH, UVT,

flourideDaily: total chlorine, alkalinity (raw and

potable) Weekly: Bac-T samples for external lab testing

Also occasional jar testing to determine

polymer and PACl dosages


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Wastewater Daily: BOD, CBOD, pH,

Phosphorus, Ammonia Nitrogen, Nitrate,

Nitrite, Total Kjeldahl Nitrogen

(TKN), TSS Weekly:


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A large amount of

data is collected

during the day from the plant and the

lab which must daily be entered

into spreadsheets


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Population 70,000

Grande Prairie Regional College

Montrose Cultural Centre – Library, Art Gallery

Sport Multiplex - pool, water park, ice rink, gym, restaurants

Muskoseepi Park and Bear Creek Ravine – parkland, bicycle trails

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Thank youTimothy Neufeld

[email protected]