AWT

What is the average HCN, NH3, and pH for the waste in the South HCN effluent tank.

1-3 HCN, 450-850 NH3, 2pH

AWT pH flow less than

2

Regulated limit of TSS total suspended solids in 301 tank is

2,171lbs/day

Neutralizer mixer drive current less than

2.5 amps

What is the design minimum flow for the jet mixer in the south HCN effluent storage tank?

25GPM min flow rate jet mixer south HCN max 150GPM

Optimal NCL3 production is at what pH?

2pH

Lime silo holds

5 trucks or 250k lbs

Max flow rate AWT

640 GPM gal/min

Target temperature for neutralizer , chlorinator, and clarifier.

65C

You want a pH for chlorinator at

7.5pH

You want a pH for neutralizer at

8.5pH

Target temperature lime slacker

85C

Neutralizer mixer drive current greater than

9.5

Neutralizer level DP greater than

90

Flange

A broad ridge or pair of ridges projecting at a right angle from the edge of a structural shape in order to strengthen or stiffen it.

Where does the AWT sump discharge to?

AWT Clarifier or pretreatment

Where does AWT sump discharge to?

AWT clarifier or pretreatment

CC 2 blue caustic scrubbers scrub

All that's vented from neutralizer, chlorinator, acid strippers, and HCN tanks

Lime bin is full

Ask Hayden to change out the grit bin when you clean the slaker. You need a mixed sample in a ziplock bag to bring to environmental lab along with paper work.

Chlorine has to go below the water level in the neutralizer why?

Because it can't interact with the titanium shaft which could cause an explosion and it would go to the vent caustic scrubbers.

Why vent header NCL3 concentration 0.8?

Because you are making NCL3

How to counteract cyanide poisoning

Break Amyl nitrate capsule

calcium cyanide and calcium hypochlorite produce

CNCL cyanogen chloride

lime (calcium carbonate)is slacked to form

Calcium hydroxide for neutralization of acidic wastes. Gives an exothermic reaction when it reacts with water (heat is given off).

Sodium thiosulfate neutralizes

Chlorine

Why ORP interlock tells you weather or not you have

Chlorine

Utilities blows directly to

Clarifier

Polymer that goes to the clarifier

Coagulates the solids and brings them down called sludge where it's pressed out.

What controls the differential pressure on the HCL stripper?

Dampener controls the differential pressure Liquid falls down and air from the blower blows up.

Increase or decrease in pH makes NCL3 more likely to form

Decrease in pH

How is liquid from the neutralizer and Chlorinator kept from getting in the vac line going to CC?

Draining the vent headers 2x a shift

NCL3 is

Explosive

Get sample from HCN dike

Get 2 orange safe packs get a buddy bring sample to Environmental Lab write pH, TOC,CN time and date initial. If CN low pH pump out to sump if 7pH no CN empty to ditch.

When tightening nuts and screws for pipe flanges

Go diagonally across slowly tighten each nut or untighten slip in gasket.

If leak in pipe use

Gore joint sealant with a hose clamp

White gasket

Gortek

Vent header

Greater than 0.8

Blue gasket

Gylon

Lime or spent caustic is used to neutralize

HCL

Label all the waste streams in AWT and where they are from

HCL from CC, HCN from HCN, Dryer Drains from CC, Spent Caustic from CC caustic scrubbers

List AWT going to mixing T

HCL, HCN, Dryer Drains, Dilution water, Lime, 50%NaOH, Process Water, Spent Caustic

List all samples that must be caught and run on normal rounds each shift.

HCN, Spent Caustic, Dirty Acid, Sodium Thio, and Cl2

List the safety equipment needed for the following job functions

Hearing protection, goggles, hard hat, rubber boots, frcs. Face shield, gloves, HCN monitor, Acid Jacket PVC Green Butle suit

When going around turns in fork lift you do what?

Honk the horn around turns.

Why Neutralizer and Chlorinator mixer drive current greater than 9.5?

If empty amps would increase because less no resistance level instrument could be clogged. Which chlorine could interact with ammonia causing NCL3.

What will happen when the lime strength is not in spec?

If too weak your pH will be low and NCL3 could form. If too strong it would plug up going to the shaker screens.

Clean lime shoot twice a shift

Inform board to turn off slaker, close water valve, wash out vent hole, open up door scrap down the lime caked up, close it back up, acid wash shaker screens, clean out grit shoot by screw make sure it's still screwing and the shakers are still shaking, turn water back to open tell board water is open.

If raining in AWT only

It's coming from the chlorinator and neutralizer vents. Inform the board stop all flows. Do the level taps. If it doesn't work. Unplug with rod along side. Tell board to open control valves at 100% and or turn on both pumps to level it down.

How do we maintain good mixing and consistent feed from south HCN tank to AWT neutralizer?

Jet Mixer

When going on an incline or decline you do what with the forks?

Keep forks up.

What is the purpose of the clarifier rake?

Keep it agitated and stirred up so it won't solidify and to suck it out as mud/sludge.

Neutralizer dilution flow

Less than 200

Neutralizer and chlorinator average orp

Less than 400

Neutralizer pH control NaOH and Lime

Less than 5.9 pH

If leak and unsure where it's coming from

Lightly tighten all the bolts

Slaking water

Lime mixes with water causes an exothermic reaction which creates calcium hydroxide which is a base

Lock out tag out

Look for empty box no paper Example EO lock box 20 Get locks from white bucket Get Manila blank tag put on box #20 on the hook where the black lock is Get zip ties, orange cable locks, red lock "6 pack" for multiple locks, Permanent marker, green tags for locks for breakers with red 6 pack lock and green locks for valves inlet and discharge , yellow tags for zip ties for switches and bleeds Keep bleeds open with yellow tag, lock out inlet, discharge, lock seal flush closed, lock out breaker, check switch start then pin through stop and yellow tag checked out in the field.

What are the possible reasons for high Cl2 in the Clarifier?

Low in sodium thio which is used to neutralize Cl2 you need to increase the feed rate of thio. Not enough HCN = excess Cl2, Too much Cl2 in dirty acid HCL.

If you see an NCl3 spike

Lower HCN effluent and you should decrease dirty HCl

Why pH less than 5.9?

Lower pH is easier for formation of NCL3 and the retention needs a high pH to neutralize NH3 and HCN.

When parked fork lift

Make sure your fork tips touches the ground

How is NCL3 formed?

NH3+Cl2

NCL3

NH3+Cl2

What are the 4 main specifications for the following system and indicate the normal values?

Neutralizer Chlorinator and Clarifier pH: 8.5, 7.5, 7.5 Cl2: 150, 100, 0 Temp: 65C, 65C, 65C ORP's: 800, 850, 0

Cl2 goes directly to

Neutralizer because Cl2 interacts with titanium and causes an exothermic reaction.

Where do you find the max weight load for a fork lift?

On the plaque.

Send lime to utilities

Open lime valve that says utilities

Chlorinator

PH less than 5.5

What affects TSS?

Polymer flow rate which coagulated solids and brings them down as mud to get pressed out.

What is the purpose of the rake in the clarifier

Rake is pushing the mud/sludge to the middle hole where it is pumped out to the filter press and given to farmers.

Chanel locks

Righty righty lefty loose. Can use back side as a hammer.

Acid + Base —> yields

Salt + water Neutralisation reaction

Take sample of lamella every two hours

Sample from mud level spouts. If mud level is greater than 30% drain out 15 minutes. If less than 30% no action. Valve at bottom of the lamella. Make sure the frac press tank valves at the bottom are closed.

Safety for fork lift

Seatbelt first, keep fork low, be aware, go slow, don't come in from the front over bump but through the side picking things up.

Belt is squeaking for the lime pump use

Spray adhesive by 3M

When going to Military Base

Take off on time sheet the days you are gone and send copy of paystub to HR

Degrit screw

Takes off the big rocks and filter screens smaller rocks

How is temperature controlled on the lime slaker?

Temperature water

After the lime truck papers are signed make sure

The cap is plugged on the lime line is on and add air for at least 5 minutes.

What happens when you exceed max flow in AWT

The clarifier will overflow

What could be a potential cause of slaker temperature swings?

Too much dilution water, silo or chute plugged up: temperature drops; If lime is too concentrated and the temperature will increase.

TSS stands for

Total Suspended Solids

True or False NCL3 can form at any pH?

True

Dilution water

Used to control strength of the lime

Name the places that lime can be pumped to?

Utilities, AWT , Frac tank filter press

Unjamming rotary airlock valve for the lime slaker

Walk up the steps take off the cage take a large wrench and rock the wooden piece where the chain is back and forth until it works

Brief description on AWT start up

Water flowing through it called water batching. Levels neutralizer and chlorinator to 65%. Turn on the bypass because interlocks start up. Introduce lime first and spoon feed acid. Playing with the pH until it gets stable bring acid up to 50% flow rate. Auto cascade lime and acid around 50. Make sure it's stable bring acid up to 75% flow rate. Dilution water cascade to acid. Bring chlorine to 25% valve. Until it's stable. You have a 20 minute bypass. Bring in HCN. When orps dropping. Increase the chlorine.

Ladder or scaffold you have to

Wear a harness anything above 4ft

How is CO2 formed in the neutralizer

When acid and lime react

If chlorine leak

You can detect it by spraying ammonia it makes a white cloud.

Chlorine neutralizes

cyanide

ORP

oxidation-reduction potential