Which of the following is a primary treatment for water pollution?
ASludge method
BTrickling filter method
CSedimentation
DRemoval of nitrates
ASludge method
BTrickling filter method
CSedimentation
DRemoval of nitrates
Related Questions:
Which of the following chemicals is/are responsible for eutrophication?
1.Nitrogen
2.Phosphorus
3.Potash
Select the correct option from codes given below:
താഴെപ്പറയുന്നവയിൽ ശരിയായ പ്രസ്താവന ഏത്?