Microalgae, tech to treat water waste: IIT BHU research

Decreasing the load of carbon dioxide in atmosphere by microalgae will resolve the issue of global warming to a great extent, says IIT-BHU research
The treated water generated from the microalgae-based treatment plant meets the criteria set by WHO and can be easily discharged in the rivers (HT file photo)
The treated water generated from the microalgae-based treatment plant meets the criteria set by WHO and can be easily discharged in the rivers (HT file photo)
Published on Sep 05, 2021 12:26 AM IST
Copy Link
By, Varanasi

Researchers from the department of biochemical engineering, Indian Institute of Technology of Banaras Hindu University (IIT-BHU) have successfully applied microalgae and machine learning to treat wastewater.

Under this application, microalgae in photo bioreactor can clean up to 90% of wastewater by setting appropriate temperature, light intensity, carbon dioxide content, pH level, which is better than the current bacterial based water treatment process.

Dr Vishal Mishra, assistant professor of biochemical engineering, said that according to the United Nations World Water Development’s report titled ‘Valuing Water’, freshwater use has increased six-fold globally in the last century.

“Despite this, more than 80 percent of the wastewater is discharged into water streams without treatment. The conventional water treatment process currently in place is extremely costly. These include high electricity costs, sludge disposal and huge amounts of carbon dioxide emissions,” he said.

“Biological wastewater treatment mediated by microalgae would clean the wastewater up to 90% and also high-quality compost in the form of microalgae biomass will prove to be very useful,” he added.

Vishal Singh, a PhD student in the research team, said that machine learning tools have been successfully implemented to optimise microalgae-based wastewater treatment process and the research has been published in Netherland based Biochemical Engineering Journal (IF3.97).

The information gained from this research can aid in experimental design, lead to large-scale wastewater treatment and can be used for designing microalgae based tertiary wastewater treatment plant.

“Besides, it could be easily integrated with current secondary wastewater treatment plants, where treatment is carried out by bacteria. Microalgae wastewater treatment plants can even entirely replace the current conventional wastewater treatment plants,” he said.

“The treated water generated from the microalgae-based treatment plant meets the criteria set by WHO and can be easily discharged in the rivers. Moreover, the treated water can be used for irrigation and cleaning purposes and thus would help decrease the load on available natural freshwater resources,’ Singh said.

“This will benefit society by solving the problem of the shortage of drinking water,” he said.

“The protein supplement and microbial biomass produced after water treatment can be used for the production of animal feed, fertiliser and biofuel. Microalgae also consume a large amount of carbon dioxide from atmosphere during the process of photosynthesis and generates oxygen,” he said. “Decreasing the load of carbon dioxide in atmosphere by microalgae will resolve the issue of global warming to a great extent,” he added.

SHARE THIS ARTICLE ON
Close Story
QUICKREADS

Less time to read?

Try Quickreads

  • A case has been registered in Vidyanagar police station. (Representational image/Stock photo)

    Chandrashekhar Guruji death: Karnataka police nab 'saral vastu' expert's killers

    Karnataka Police nabbed the two assailants who stabbed Vastu expert Chandrashekhar Angadi popularly known as Chandrashekhar Guruji to death at a hotel in Hubballi on Tuesday. The two accused were detained by police in Ramdurg while they were trying to escape. According to Police, Chandrashekhar Guruji was staying at the hotel in Hubballi for the last four days. He was rushed to the KIMS Hospital where he was declared dead.

  • A man covers his head to protect from the sun on a hot summer day in New Delhi. (ANI Photo)

    Partly cloudy sky in Delhi today, thundershowers expected towards evening

    Delhi is likely to see cloudy sky with light rain on Wednesday, with light to moderate thundershowers expected towards evening, the India Meteorological Department said in its forecast. The minimum temperature on Wednesday is likely to be around 28 degrees Celsius, while the maximum temperature is predicted to reach 37 degrees Celsius. The maximum temperature on Tuesday was 37.9 degrees Celsius and the minimum temperature stayed at 29 degrees Celsius.

  • The second phase of polling will be held on July 13 and the counting would be done on July 17. (Pics for representation)

    Madhya Pradesh civic polls: 1st phase of voting in 44 districts today

    Polling across 44 districts for the first phase of elections to urban bodies in Madhya Pradesh begins today. A total of 1.04 crore voters are expected to exercise their franchise in the first phase of polling, an official informed news agency PTI. Voting will go on till 5pm, he added. Votes will be cast for municipal corporations including Bhopal, Indore, Gwalior, Jabalpur, Khandwa, Burhanpur, Chhindwara, Ujjain, Sagar, Singrauli and Satna.

  • The Punjab School Education Board (PSEB) declared the Class-10 results on Tuesday. (HT Photo)

    PSEB Class-10 results: Mohali rises in ranking, slips in pass percentage

    Even though Mohali district rose by two spots from last year's ranking in the PSEB Class 10 exams, its pass percentage dropped from 99.91% to 99%. Last year, Mohali was placed 17th among the 23 districts. This year, it improved its standing to 15th, with Gurdaspur district bagging the top spot. As many as 9,401 students from 109 Mohali schools appeared in the exams and 9,307 passed.

  • A pack of five atracurim vials, a paralytic drug used in anaesthesia, was lying near the doctor, with four of the vials empty, said Mohali police. (iStock)

    32-year-old doctor ends life in Mohali’s Phase 2

    A 32-year-old doctor allegedly ended his life by injecting himself with a paralytic drug used in anaesthesia at his rented accommodation in Phase 2 on Monday night. The doctor, who hailed from Rupnagar, was living alone in the rented house for the last three months and worked at a private hospital in Sector 34, Chandigarh. The autopsy will be conducted at the Phase-6 civil hospital on Wednesday.

SHARE
Story Saved
×
Saved Articles
Following
My Reads
Sign out
New Delhi 0C
Wednesday, July 06, 2022