Question

Bod of the effluents discharged on land for irrigation

Answer 1

BOD can be used as a gauge of the effectiveness of wastewater treatment plants. It is listed as a conventional pollutant in the U.S. Clean Water Act. BOD is similar in function to chemical oxygen demand (COD), in that both measure the amount of organic compounds in water.

Answer 2

$\mathcal{ANSWER}$

$\rule{300}{1}$

Effluents before discharge are as follows :-

Effluents can be biologically detoxified if they have little or no heavy metals. Following are the steps for treatement of effluents before discharge.

$\rule{300}{1}$

•Primary Discharge :- Sludge, the solid content of the sewage, is removed in this treatement. Sludge can be removed either by filteration or by setting the sludge by sinking it.

$\rule{300}{1}$

•Secondary Treatement :-The clear effluent undergoes aeration in secondary treatement. The liquid phase may be aerated in daylight in large storage tanks.

$\rule{300}{1}$

•Tertiary Treatement :- The liquid phase is passed throught the clear filter tube which is exposed to intense ultraviolet light. The treatement will totally destroy all known $\mathsf{(Pathogens).}$

$\rule{300}{1}$

#answerwithquality

#BAL

$\rule{300}{1}$