Select the correct combination of materials which make up the 0.1% impurities of wastewater composition.
(a) Suspended solids (i) Nitrate, $N H_{3}$ , sodium, calcium and phosphate
(b) Colloidal material (ii) Faecal matter, bacteria, cloth and paper
(c) Dissolved material (iii) Sand, silt and clay

Question

Select the correct combination of materials which make up the 0.1% impurities of wastewater composition.

(a) Suspended solids	(i) Nitrate, $N H_{3}$ , sodium, calcium and phosphate
(b) Colloidal material	(ii) Faecal matter, bacteria, cloth and paper
(c) Dissolved material	(iii) Sand, silt and clay

TestHub · Accepted Answer

Waste water has 99.9% water and 0.1% waste including suspended solids and dissolved materials. Small solid particles are referred as suspended solids remain in suspension in water due to the motion of the water. It includes sand, silt and clay. Waster part also has colloidal particles including non-settleable organic matter, cloth, paper, small particles of decayed plant material.

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