India being a water scarce nation with rapidly increasing population requires innovative solutions to either cut down the water usage
or reuse/recycle the wastewater generated by human activities. There is an urgent need to reduce the forever increasing gap of the supply
and demand of potable water. Due to long distance transportation to water scarce localities, the billing charges of freshwater usage takes
a heavy toll. Reduction of groundwater extraction will lead to the natural conservation of water resources.
Challenges FacedReusing Sewage water often leads to the risk of F.Coli contamination.
Although, due to the perception of the society wherein it is unacceptable to ‘consume’ sewage water as potable; some level of aesthetics
needs to be maintained.
Problems of colour, odour, COD (Endocrine Disrupters in Medicines, Shampoos, etc) are often the kind of challenges faced when reusing sewage.
Remove pathogens thus reducing challenges at final disinfection especially Cryptosporidium which is highly resistant to chlorination
Common STP Problems in Today’s Times
A lot of STPs in India were designed just to comply with the pollution control norms.
Majority of factors were neglected while designing these STPs; hence we often come across
STPs which are running over capacity and are unable to produce the desired results.
With the industrial revolution and advancement in every sector including household items , the household discharge these days are getting even more complex.
Typical problems of biological systems failing to give any reduction in COD/BOD etc have become widespread.
Majority of the STPs that were built decades ago are not capable enough to comply with revised norms. Hence the delta COD which remains after tertiary treatment has to be treated in some way to meet the required standards.