Q. Name the compound formed when lime is added in order to precipitate phosphate.

View solution

Q. At which point, chemical addition for phosphorous removal can’t be carried out?

View solution

Q. Calculate the dosage rate for the following data.

Flow rate: 2200m³/hr
Dosage: 100 ppm

View solution

Q. Calculate the volume of lime to be dosed for the below given data. Round it off to the nearest digit.

Flow rate: 2200m³/hr
Dosage: 25 ppm
Specific gravity: 1.12
Concentration: 10%

View solution

Q. Calculate the size of the tank for the below given data. Round off to the nearest 1000 digit.

Flow rate: 440lph
Retention time: 17 hrs

View solution

Q. What is the detention time assumed while designing a flash mixer?

View solution

Q. Determine the size of a flash mixer for the following data. Round off to the nearest digit.
Flow rate: 2200 m³/hr

View solution

Q. A process of contact and adhesion whereby the particles of a dispersion form larger-size clusters is called ________

View solution

Q. What is the other name for deflocculation?

View solution

Q. How many types of solids are present in water?

View solution

Q. What is the movement of solids in water called?

View solution

Q. The clustered particles formed in the presence of a flocculant are called ______

View solution

Q. What is the chemical formula of aluminium sulphate?

View solution

Q. 1 micrometer = _______

View solution

Q. What is the test used to select the type of coagulant required?

View solution

Q. What is the ratio of Alum/Phosphate while adding alum to a waste water in order to remove the phosphates present?

View solution

Q. At what pH is the solubility of AlPO₄ minimum?

View solution

Q. At what pH is the solubility of FePO₄ minimum?

View solution

Q. Addition of which of these result in lowering the BOD level?

View solution

Q. What is the ideal mixing time required for polymers?

View solution