Paradigm shift to Decentralised Wastewater Treatment Systems in India

Posted by Global technology interface on June 08, 2021


India is one of most water-stressed countries in the world and is on the trajectory of becoming water scarce in the coming years. As per the latest Niti Aayog study, the Per capita water availability is expected to reach 1,465 cubic metres by 2025 from 1,544 m3 in 2011. It is forecasted that if appropriate measures and combats are not taken, the country may have to confront a series of associated problems, ranging from health issues due to poor sanitation and conflicts over water access, to food security and climate change. Now the burning question that arises from these statistics is how would we ensure the water available in the coming years.

A proposed alternative to India’s growing water crisis that is prevalent these days is to recycle and reuse of treated wastewater which can be one of the procedures to decrease the pressure on water resources and bodies. It is estimated that almost 80 per cent of the water supplied to a household is discharged as wastewater. The discharge is mostly untreated and is a potential pollutant of ground water or being discharged into the natural drainage system, causing pollution in downstream areas and water bodies. Instead of constructing large conventional STPs in which emphasis is placed on setting up a large infrastructure network, what we need to look at are alternative methods which don’t burden the economy and environment.

Decentralized wastewater treatment and reuse (DWTRU) using small-scale on-site sewage treatment plants (STPs) is an attractive solution addressing the problems of water pollution and scarcity, especially in rapidly urbanizing cities in developing countries, where centralized infrastructure for wastewater treatment is inadequate.

Prominent start-ups working on Waste Water Recycling

1. Elentec – Onsite Wastewater Reuse

Wastewater recycling and polishing removes all contaminants from residential sewage and industrial waters, includes primary, secondary or tertiary stages of purification, and returns water back in the system for groundwater restoring or onsite reuse in agriculture and industry. British Elentec facilitates the implementation of electro-coagulation (EC) in secondary wastewater treatment and tertiary polishing, which proves to produce less footprint, be more safe and stable, compared to traditional chemical reclamation.

2. ClearCove – Primary Wastewater Treatment

Primary wastewater treatment serves the goal of decreasing the amount of sewage discharge into the environment of smart cities by directing effluent flows into designated recycling facilities. They enable special screening, sedimentation, initial physical/chemical filtering, removal of solid and flowing contaminants as well as separating water from sludge. Obtained water usually gets reused at industrial and agricultural sites or undergoes further processing.

3. BioGill – Secondary Wastewater Treatment

The secondary treatment is associated with removing impurities as well as biodegradable and organic particles from a city’s H2O discharge based on biofiltration, aeration, oxidation, and use of specific microorganisms to purify water in a sustainable (and close to nature) way. Cleaned water usually serves industrial, agricultural, and municipal needs. BioGill produces above-ground scalable and modular bioreactors, equipped with patented nanoceramic films (so-called “gills”), used for planting active biomass.

Decentralised and low?cost wastewater treatment systems can augment limited treatment capacity in Urban India. Also, to mainstream decentralised wastewater treatment systems needs a policy-level thrust from the government. The socio-economic situation and the context of urbanisation in India also highlight that there is need for decentralised wastewater solutions. In such circumstances, local reuse and recycling of treated wastewater too holds immense potential in terms of overall urban environmental sustainability.

4. AQUA4D

The technology here is based on quantum physics and it has the potential to transform the way water molecules interact with soil and organic matter. This helps in bringing about an array of benefits for plants, land and growers alike. The increased resource efficiencies ensure a return on investment in 6-36 months, and increased  plant health brings increased export quality (as evidenced by dozens of field references). Furthermore, with no maintenance or consumables, less fertilizer use, and less chemicals, the overall irrigation process is made more sustainable and less labour-intensive. Lastly, the technology brings about a tangible social impact, in the decreased use of harmful chemicals by farm staff, and through better functioning water systems employees are able to focus on other tasks.

These technologies can be easily scouted from the Global Technology Interface™ ( GTI ™) platform which is an online portal for companies, entrepreneurs, MSMEs, startups and R&D institutions to showcase innovative technologies and facilitate collaborations in technology, science, research, and business on a global platform in a sustained manner.

5. Astariz Ventures Sdn Bhd (AVSB)

Astariz Ventures Sdn Bhd (AVSB) is focusing on developing high tech products – micro water treatment, in particular. The technology it possesses is the latest and most innovative in micro water treatment, which gives AVSB an advantage over its competitors, and this enables the company to venture into raw water, sewage and commercial water (industrial, etc.) treatment business. The water treatment technology system here uses Nano ceramic membrane. By using ceramic, the lifespan of the membranes is longer and more durable. The process flow for all the systems are designed in a such that it is able to withstand the worst water quality without chocking the membrane and at the same time able to produce high flux rate. The system here is able to process any water source regardless of its quality and turn into clean water that is free from bacteria, parasite and viruses.

Similarly, to scout and find other appropriate technologies on wastewater or any allied sectors, we are offering the Global Technology Interface™ ( GTI ™) platform which is an online portal for companies, entrepreneurs, MSMEs, startups and R&D institutions to showcase innovative technologies and facilitate collaborations in technology, science, research, and business on a global platform in a sustained manner. GTI™ functions as a global market place where biotech, clean-tech and ICT entities can identify partners, investors and customers across geographic boundaries.

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