Skip to main content
Feb 26, 2016 / Haseeb Jamal -

5 Travel Myths You Need to Stop Believing Right Now

Feb 26, 2016 / Haseeb Jamal -

Canal Comes Alive with Lighted Boat Parade.

Determination of Biochemical Oxygen Demand Of Wastewater

Bio oxygen demand (B.O.D) is the amount of oxygen required for the microorganisms (bacteria) present in the waster water to convert the organic substance to stable compounds such as CO2 and H2O. Bacteria placed in contact with organic materials will utilize it as a food source in the utilization the organic material will be oxidized to CO2 H2O. B.O.D is

Find Dissolved Oxygen in given Sample by Azide Modification

Oxygen is required for all living organisms for growth (metabolism) 21% in air quantity directly related with atm pressure and inversly proportional to temp for trout 7.5 mgl required. Add 2ml alkali iodide azide if becomes yellow = oxygen present while no oxygen ppt will be created let it settle ( Na2S03, Sodium sulphride) brings oxygen to zero. Add NaS03 to another

Algal Growth & Surface Water Quality

Algae are photosynthetic organisms that occur in most habitats. They vary from small, single-celled forms to complex multi-cellular forms, such as the giant helps that grow to 65 meters in length. Algae are a large group of complex-celled photosynthetic organisms.

Break Point Chlorination

When the molar ratio of chlorine to ammonia is greater than 1.0, there is a reduction of chlorine & oxidation of ammonia. A substantially complete oxidation-reduction process occurs in ideal condition by a 2:1 ratio

Definition and Types of Chlorination

It is the method of disinfection by which the micro organisms are killed if chlorine & its components are used. Chlorination serves not only for disinfection, but as an oxidant for other substances (iron, manganese, cyanide, etc) & for taste & odor control in water & wastewater.

What is Chlorine Demand

It is the difference between the amounts of chlorine applied to amount of free, combine or total available chlorine remaining at the end of contact period (specified) which should be at least 30min.

Search AboutCivil