Why should we reuse Treated Sewage?
Agriculture uses wastewater as a source of fertilizers. That explains why in underdeveloped nations like India irrigation using untreated (or partially treated) wastewater is prevalent. For farmers and the general public, health concerns can be significant. For safe wastewater reuse, the difficulty is to create appropriate treatments for each use.
Industrial recycling is another popular form of wastewater reuse, in which an industrial facility reuses "waste" water on site for activities such as cooling. By minimizing polluted discharges into surface water, wastewater recycling also aids in the preservation of aquatic life and biodiversity.
Applications of reuse and recycling
The percentage of sewage that is recycled or reused after suitable treatment in gardens and parks, irrigation, and other applications is defined as at least 20% to begin with.
In India's current practices, treated sewage is used for a variety of purposes, including
(a) Farm Forestry: Since the 1980s, the CMWSSB has promoted the establishment of farm forestry in Chennai, which helps to create a microclimate in a city setting.
(b) Horticulture: The Indian Agricultural Research Institute in Karnal conducted research on sewage farming and recommended a method of irrigation for sewage-fed tree plantings.
(c) Toilet flushing: In some of the big condominiums and high-rise apartment complexes in major metropolitan cities like as Delhi, Mumbai, Bangalore, and Chennai, treated grey water is being used for toilet flushing on a pilot scale. To protect against the spread of waterborne infections, RO membranes should be utilized in the treatment procedure.
(d) Non-human contact cooling towers: Chandigarh uses treated sewage for horticultural purposes in its green spaces, as in non-human touch cooling.
(e) Fish culture: For selected institutional centres, Delhi has implemented planned reuse of treated sewage.
(f) Indirect and incidental uses: The Karnataka government has issued an official instruction to ensure that only tertiary treated sewage is used for non-potable applications, such as all gardening, including parks, resorts, and golf courses.
What is the BOTTOM LINE?
In impoverished countries, water reclamation and recycling is a truly sustainable development path that creates jobs and food!
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