To treat both kinds of water, the researchers devised an ingenious solution; they used microbes to not only drive the treatment process, but also to recover some valuable nutrients out of the wastewater at the same time. The system was created from polyacrylic reactors containing two chambers, which were separated by an ion-exchange membrane and equipped with three electrodes.
- Researchers from the Biological Systems Unit at the Okinawa Institute of Science and Technology Graduate University have created a system to treat both raw and aerated wastewater.
- The system relies on bacterial communities to break down organic material from raw wastewater and remove nitrate together with phosphate from aerated wastewater.
- It is easy to assemble and low maintenance.
- A proof-of-concept have been shown to work in both the lab and on a local swine farm in Okinawa, Japan.
Anyone who lives in Okinawa, a subtropical island in Japan, has an appreciation of the intensity of its pig farming industry. The farms have a large effect on the island’s economy and culture. According to Japan’s Cabinet Office, as of 2018, there were over 225,000 pigs in Okinawa. Pork is a staple in the local diet and is found in many dishes in traditional restaurants. But the presence of the pig farms has another, less welcome, impact – the odor-y kind. Drive through some particularly farm-filled areas with the car’s windows wound down and you’re sure to be filled with regret.
This smell is, at least in part, caused by a byproduct of the pig farming. Across Okinawa, large amounts of wastewater are produced by the farms. Now, researchers from the Biological Systems Unit at the Okinawa Institute of Science and Technology Graduate University (OIST) have created a new system for treating this wastewater, which they’ve successfully tested on a local swine farm in Okinawa.
“Our new system uses two different chambers,” explained Dr. Anna Prokhorova, lead author of a paper recently published in Bioresource Technology. “In the one chamber, full strength swine wastewater is treated for the removal of odor, pathogens, and organic matter, whereas in the other chamber, excess nitrate and phosphate is removed from wastewater that has already been treated through the traditional aeration system. To the best of our knowledge, this is the first system to successfully treat two different types of wastewater at the same time.”
This is a stark contrast to the traditional aeration system currently utilized by farmers which mainly treats organic matter in the wastewater and also converts the ammonium present to nitrate but does not treat the nitrate further. In Japan, the nitrate discharge limit for the livestock industry will soon be lowered to one fifth of the current level (which today sits at 500 milligrams of nitrate-nitrogen per liter) to be in line with other industries. More than 35% of farms in Okinawa are likely to exceed this impending change.
“This is of huge concern because nitrate contamination can have disastrous impacts on both human health and the environment,” said Dr Mami Kainuma, group leader in the Biological Systems Unit. “When nitrate is ingested by people, it is converted to nitrite, which impacts the bloods’ ability to carry oxygen and can lead to methemoglobinemia or blue baby syndrome.”
More from: Okinawa Institute of Science and Technology
The Latest Updates from Bing News & Google News
Go deeper with Bing News on:
Value from sewage
- Willow trees could be a sustainable (and beautiful) way to treat wastewateron July 1, 2021 at 9:00 am
The lovely, weepy trees were able to filter over 30 million liters of primary wastewater per hectare in the course of three years.
- ‘An infrastructure crisis.’ Granbury’s growing pains are at center of mayoral raceon June 29, 2021 at 11:16 am
Four candidates are running to be mayor of Granbury, which is facing a moratorium on development and a potential legal battle over a new sewage plant.
- Europe's first large-scale wastewater treatment research facility using bacteriaon June 28, 2021 at 9:00 pm
The largest research facility in Europe which uses bacteria to treat wastewater has opened at Birtley, near Gateshead, UK. Set up by Newcastle University, UK and Northumbria Water it will host ...
- Treasured but suffering, Florida springs get ‘minuscule’ attention, says coalition reporton June 28, 2021 at 9:59 am
The Florida Springs Council issued a report Wednesday condemning the state’s caretaking of springs as generally dismal, woefully underfunded and not likely to restore spring health for many decades or ...
- Sewage Treatment Facilities Market Provides Company Profiles which includes Sales, Price, Revenue and Gross Margin 2021 to 2027on June 28, 2021 at 3:07 am
Jun (The Expresswire) -- "Final Report will add the analysis of the impact of COVID-19 on this industry" “Sewage Treatment Facilities Market” ...
Go deeper with Google Headlines on:
Value from sewage
Go deeper with Bing News on:
- Village may end up with two wastewater plantson July 4, 2021 at 5:01 pm
Irish Water has been asked to explain why the Connemara village of Roundstone may end up with two wastewater treatment plants in an effort to meet EU water quality standards.Bord Pleanála, the ...
- Dennis and Yarmouth look to build their own wastewater plantson July 2, 2021 at 3:02 pm
Regional wastewater agreement in jeopardy after Harwich signals its reluctance to move forward. Dennis and Yarmouth considering building own plants.
- Lowellville receives funding for wastewater treatment projecton July 2, 2021 at 1:38 pm
Congressman Tim Ryan announced on Friday that he secured $549,600 in funding for the Village of Lowellville Wastewater Project.
- $2.9 million effort to address wastewater woes in peril in Lowndes Countyon July 2, 2021 at 11:37 am
A $2.9 million effort to address wastewater treatment shortfalls in Lowndes County is in jeopardy after a recent county decision.
- Water and Wastewater Treatment Chemicals Market 2021, Industry Analysis, Size, Share, Growth, Trends and Forecast to 2027on July 2, 2021 at 9:31 am
A New Market Study, Titled “Water and Wastewater Treatment Chemicals Market Upcoming Trends, Growth Drivers and Challenges” has been featured on fusionmarketresearch. This global study of the Water ...