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Sludge Thickener Tank

What is Sludge Thickener Tank ?

Sludge Thickener Tank

  • To increase the Sludge concentration
  • To increase the efficiency of Filter press
  • To reduce the sludge volume by anaerobic reaction
  • To reduce moisture content in the sludge

 CHEMICAL  PREPARATION

TOTAL HARDNESS

0.02N EDTA SOLUTION

  • 723gm of Disodium salt of EDTA is dissolved in 1000ml of distilled water.

 0.02N CALCIUM CARBONATE SOLUTION

  • Take 1.0gm of Calcium carbonate in a conical flask , add 50 ml of distilled water Add 20.5 ml of 1N HCl , warm and cool and transferred to 1000ml standard flask and make up to the mark with distilled water.

  BUFFER SOLUTION

  • 9 gm of Ammonium chloride was dissolved in 143 ml of Conc. Ammonium hydroxide . This solution is A.
  • 179 gm of Disodium salt of EDTA + 0.78 gm of MgSO4.7H2O was dissolved in 50 ml of distilled water. This solution is B.
  • Add these are solution and mix well. Then make up to 250ml with distilled water.

 

ERIOCHROME BLAKE –T INDICATOR

  • 5gm of Eriochrome blake –T + 100 gm of Sodium chloride–AR grade.

 

CALCIUM HARDNESS

  1N NaOH SOLUTION

  • 40 gm of Sodium hydroxide dissolved in 1000 ml of distilled water.

 

MUROXIDE INDICATOR

  • 150 gm of Muroxide dissolved in 100 gm of absolute ethylene glycol.

 

PHENOLPHTHALEIN ALKALINITY

 

.02N SULFURIC ACID SOLUTION

  • 5ml of Sulfuric acid is dissolved in 1000ml of distilled water.

 

0.02N SODIUM CARBONATE SOLUTION

 

  • 06gm of Sodium carbonate is dissolved in1000 ml of distilled water .

 

PHENOLPHTHALEIN INDICATOR

  • 5gm of Phenolphthalein was dissolved in 95%Ethanol. 50ml of distilled water was added. 0.05N Sodium Hydroxide solution was added drop-wise until the solution turned pink

 

METHYL ORANGE ALKALINIT

 

METHYL ORANGE INDICATOR

  • 05 gm of Methyl orange dissolved in100 ml distilled water.

 

ACIDITY

 

0.02N SODIUM HYDROXIDE SOLUTION

  • 8 gm of sodium hydroxide dissolved in1000 ml distilled water.

 

FREE RESIDUAL CHLORINE

 

0.025N SODIUM THIO SULFATE SOLUTION  

  • 205 gm of Sodium thio sulfate is dissolved in 1000ml of distilled water
  • Add 0.4 gm of Sodium hydroxide

STARCH

  • Dissolve 1.0gm of Starch in little water .
  • Stir it well with a glass rod to make it as a thin paste.
  • This paste is mixed 100 ml distilled  water .
  • Then boil for 2 minutes and cool to room temperature

 

0.1N POTASSIUM DICHROMATE

  • 9 gm of Potassium dichromate dissolved in 1000ml of distilled water.

 

10% KI SOLUTION

  • 10 gm of Potassium iodide dissolved in 100 ml distilled water.

 

CHLORIDE

0.028N SILVER NITRATE  SOLUTION

                        3955 gm of Silver nitrate dissolved in 500ml of distilled water.

 

0.0282N SODIUM CHLORIDE SOLUTION

  • 824gm of Sodium chloride dissolved in 500 ml of distilled water.

 

POTASSIUM CHROMATRE INDICATOR

 

  • 25gm of Potassium chromate dissolved in 100ml of distilled water. Add Silver nitrate solution drop wise until a slight red precipitate is formed. Allow to stand for 12 hours. Filter and dilute the filtrate to 500ml.

 

DISSOLVED OXYGEN

 

0.025N SODIUM THIO SULFATE SOLUTION

  • 205 gm of Sodium thio sulfate is dissolved in 1000ml of distilled water
  • Add 0.4 gm of Sodium hydroxide.

 

0.1N POTASSIUM DICHROMATE

  • 9 gm of Potassium dichromate dissolved in 1000ml of distilled water.

 

10% KI SOLUTION

  • 10 gm of Potassium iodide dissolved in 100 ml distilled water.

 

MANGANOUS SULFATE SOLUTION  

  • Dissolve 480 gm MnSO4.4 H2O in distilled water and dilute to1000ml (Or)
  • Dissolve 400gm MnSO4.2H2O in distilled water and dilute to1000 ml

(Or)

  • Dissolve 364 gm of MnSO4 in distilled water and dilute to 1000 ml

 

ALKALI IODIDE-SODIUM AZIDE SOLUTION

  • SOLUTION –A -125 gm of NaOH dissolved 100 ml distilled water.
  • SOLUTION –B – 37.5 gm of KI dissolved in 37.5 ml distilled water.
  • SOLUTION –B – 2.5 gm of Sodium azide + 10ml distilled water.
  • These solutions A, B&C are mixed and make up to 250 ml.

 

STARCH

  • Dissolve 1.0gm of Starch in little water .
  • Stir it well with a glass rod to make it as a thin paste.
  • This paste is mixed 100 ml distilled  water .
  • Then boil for 2 minutes and cool to room temperature

 

CHEMICAL OXYGEN DEMAND

0.1N FAS  SOLUTION  

  • Dissolve 19.645gm of Ferrous ammonium sulfate+10 ml of Conc. Sulfuric acid in distilled water and dilute to 500 ml.

 

0.25 POTASSIUM DICHROMATRE SOLUTION

  • Dissolve 6.129 gm of Potassium dichromate in distilled water and dilute to 500 ML.

 

SILVER SULFATE-SULFURIC ACID

  • 525 gm of Silver sulfate dissolved in 250 ml Conc. Sulfuric acid.

 

BIOLOGICAL OXYGEN DEMAND

 

PHOSPHATE BUFFER SOLUTION

 

  • Dissolve 8.5 g KH2PO4 , 21.75 g K2HPO4, 33.4g Na2HPO4 & 1.7g NH4Cl In 500 ml distilled water then make up to 1 Liter.
  • The PH should be 7.21

 

MAGNESIUM SULFATE SOLUTION

  • Dissolve 22.5g Mgso4.7H2O in distilled water and dilute to 1 liter

 

CALCIUM CHLORIDE SOLUTION

  • Dissolve 27.5g CaCl2 in  distilled water and dilute to 1 liter

 

FERRIC CHLORIDE SOLUTION

  • Dissolve 0.25 g FeCl3.7H2O in distilled water and dilute to 1 liter

 

SEED SOLUTION

  • Take recycle sludge in aeration tank

 

STRENTH OF SODIUM HYPO CHLORITE

0.1N SODIUM THIO SULFATE SOLUTION

  • 2gm of sodium thio sulfate dissolved in 1000 ml of distilled water.
  • Add pinch of NaoH

 

  2N SULFURIC ACID SOLUTION

  • 27 ml of 98 % Conc. Sulfuric acid dissolved in 500 ml of distilled water .

 

12 % KI SOLUTION

  • 12 gm of KI dissolved in 100 ml of distilled water.

 

STARCH

  • Dissolve 1.0gm of Starch in little water .
  • Stir it well with a glass rod to make it as a thin paste.
  • This paste is mixed 100 ml distilled  water .
  • Then boil for 2 minutes and cool to room temperature

 

STRENGH OF LIME

 

 0.1N HYDROCHLORIC ACID SOLUTION

  • 9 ml of HCL dissolved in 500 ml of distilled water.

 

STRENGH OF FERROUS SULFATE

 

0.1N POTASSIUM PERMANGANATE SOLUTION

  • 58gm of potassium permanganate dissolved in 500ml of distilled water.

 

0.1N OXALIC ACID SOLUTION    

  • 152gm of Oxalic acid dissolved in 500 ml of distilled  water.

 

 2N SULFURIC ACID SOLUTION

  • 27 ml of 98 % Conc. Sulfuric acid dissolved in 500 ml of distilled water

 

DEFINITIONS

 

DENSITY

Mass -kg

Volume- M3

 

MOLES

 

Weight in gm

Molecular weight

 

MOLALITY

 

Moles of solute

Weight of solvent

MOLARITY

             

Moles of solute

Volume of solution

 

NORMALITY

 

Gm/Equivalent weight of solute

Volume of solution in liter

 

EQUIVALENT WEIGHT

 

Molecular weight

Valancy

 

PPM

 

Milli grams of solute                           =    Milligrams per liter of solution

1000000 milligrams of solution                   specific gravity of liquid

 

PPB            

Milli grams of solute

1000000000 milligrams of solution

 

NOTE

 

1000 PPB = 1 PPM

 

Sludge thickener tank is used in ETP

 

About Engr. Kh. Mashiur Rahman

He is Garment Automation Technologist and Editor in Chief of Autogarment. He is certified Echotech Garment CAD Professional-China, Aptech-India, NCC-UK and B.Sc. in CIS- London Metropolitan University, M.Sc. in ICT-UITS. He is working as a Successful Digital Marketer and Search Engine Specialist in RMG sector during 2005 to till now. Contact him- apparelsoftware@gmail.com

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