A bubble curtain is a non-invasive solution to stop plastic from entering the oceans. Ships and fish can pass through the air bubbles, but plastics will be stopped
Geocycle the global waste management arm of LafargeHolcim, that manufactures building materials, will implement the innovative ‘bubble curtain’ technology for the first time in India to stop plastic from entering the Yamuna river.
LafargeHolcim is the parent company of cement majors Ambuja Cements, and ACC Ltd. Geocycle India is the in-house waste management arm of Ambuja and ACC, providing industrial, agricultural, municipal, and plastic waste management services.
A bubble curtain is a non-invasive solution to stop plastic from entering the oceans. Ships and fish can pass through the air bubbles, but plastics will be stopped. The bubble screen is created by a specially designed air tube which is placed diagonally on the bed of the canal or river. It brings waste to the surface, channels the plastic onto the banks where it can be extracted.
The bubble barrier is generated using compressed air passing through tubes that are placed at the bottom of the canal. These tubes are connected with a compressor which is powered by renewable solar energy. Further, aeration in the canal will increase dissolved oxygen levels in the wastewater/stormwater leading to an overall improvement in the water quality.
“Geocycle’s approach to river plastic cleaning is distinct from other river clean-up projects which rely on landfilling or incineration. Geocycle’s vast co-processing infrastructure guarantees safe and environmentally friendly final treatment of the collected waste," said Neeraj Akhoury, CEO India, LafargeHolcim, and MD & CEO of Ambuja Cements Limited.
“These two technologies - bubble curtain and co-processing combined - offer a good opportunity to fight the challenge of marine litter by tackling the problem at the source," he added.
The Geocycle Bubble Barrier has been established on the Mantola Canal of Agra City in Uttar Pradesh, which carries 40% of the storm and wastewater of Agra City.
Once successful, this technology will be replicated in other countries.
“The Geocycle Bubble Barrier is an innovative concept based on existing technology which makes smart use of a combination of natural currents and a bubble curtain to channelize plastic waste towards the banks of rivers and canals instead of it flowing directly into the Yamuna river, from where it is collected for safe treatment," says Mr. Atul Bagai, Head India Country Office, UN Environment Programme.
The Mantola canal has been selected for this unique project as it carries 40% of Agra city’s wastewater. Moreover, the plastic leakage into the canal is significant. Capturing the plastics floating in this canal will help in preventing the plastic litter of the Yamuna River.
The plastic waste extracted from the canal will be taken to a Municipal Solid Waste treatment and Materials Recovery Facility.
The recyclable plastics will be sent to recycling facilities, while the non-recyclable plastics will be taken to Geocycle’s facility for pre-processing followed by co-processing in ACC or Ambuja cement kilns.
11 million tons of plastic enter the oceans every year, making it one of the biggest threats society faces. If this trend continues unabated there will be more plastic than fish in the oceans by 2050. Most of the plastic in the ocean gets there by way of rivers.