What is the key tool against water scarcity now a days?
In India, water scarcity is a year-round problem that affects nearly 1 million people. In addition to harming India's vast rural and urban populations, water scarcity has a significant impact on the ecology and agriculture. Despite having a population of over 1.3 billion, India only has 4% of the world's fresh water resources.
Despite the fact that climate change has reduced rainfall and hence water supplies, the country still receives enough rainfall to support the demands of over 1 billion people, as per the Central Water Commission. However, due to poor rainwater harvesting, India only receives 8% of its yearly rainfall. Due to increased urbanization and ineffective execution of municipal planning requirements, many of the ponds that were used to gather water have been lost.
India has similarly struggled with wastewater purification for reuse. Approximately 80% of home wastewater is disposed of as waste and flows into other bodies of water, eventually contaminating salt water sources.
What is the role of Government in waste management?
Municipalities, governments, and businesses are championing a waste management method known as zero liquid discharge (ZLD) for this reason. This approach stems from the fact that the amount of garbage and discharges produced by society today is expanding at an alarming rate, making it difficult for nature to absorb them, and so recycling procedures are no longer sufficient.
This also necessitates significant changes in the treatment of materials throughout manufacturing and consumption, with the goal of recovery and reuse rather than waste.
What is Zero Liquid Discharge?
The ZLD concept is based on the utilization of techniques and processes that allow all polluted effluents to be reused while meeting three important goals:
1. As much as feasible, reduce the amount of water brought in from outside the company.
2. To avoid pollution of the environment, properly treat dirty effluents.
3. Reduce the amount of garbage produced.
Technologies used to minimize the final effluent
The construction of a Zero Liquid Discharge (ZLD) system based on the zero waste idea entails treating all liquid waste to the point where it can be reintroduced into the process, minimizing final rejection.
The technologies used to concentrate and reduce the final effluent fall into one of two categories:
· Membrane Separation Technologies: include micro- and ultrafiltration units as an initial pre-treatment, as well as processes like nanofiltration and reverse osmosis to restore up to 80% of the water, allowing pollution to be concentrated into a liquid refusal flow while producing high-quality water.
· Vacuum evaporators and crystallizers concentrate the rejection flow from membrane methods to generate distilled water, which can be utilized in the process, and a dry solid residue, allowing the aim of no final discharge to be accomplished.
Advantages of Zero Liquid Discharge
There are various advantages to adopting this attitude over utilizing as much water as necessary and disposing the effluents created, but the following are possibly the most significant:
1. The majority of water is reused, resulting in a significant reduction in water use from outside the company.
2. There will be no contamination of natural resources due to the discharge of waste effluents because no waste would be emitted.
3. Waste generation is kept to a bare minimum, which has both environmental and economic advantages.
4. Economic savings due to the abolition of administrative fines imposed as a result of pollution.
5. In terms of water use, there is a high level of self-sufficiency.
Netsol Water believe in saving fresh water sources and to re-use waste water for processes like irrigation, etc. We are developing better technologies day to day to ensure proper treatment of waste water.