A Missouri University of Science and Technology professor has shown that improving wastewater treatment and saving energy are not only essential, but they’re also compatible.
Dr. Jianmin Wang, professor of civil, architectural and environmental engineering at Missouri S&T, has developed multiple wastewater treatment technologies that produce freshwater that is not only cleaner than wastewater treated using traditional methods, but also requires less maintenance and energy. Additionally, his inventions can be used to retrofit existing wastewater treatment plants.
On Feb. 6, Missouri Gov. Jay Nixon announced nearly $1.1 million in grants for the Small Community Engineering Assistance Program, implemented through the Department of Natural Resources to help communities with wastewater engineering costs, whether it’s commissioning a report or making repairs and upgrades.
Although his technology is too new, in regulatory terms, to be of use in the grant recipient communities, Wang says his technology is superior to existing ones in terms of cost and treatment efficiency.
Wang will discuss his treatment systems during a presentation titled, “Harnessing Energy and Freshwater from Wastewater: Reversing the Environmental Footprint” at 3:30 p.m., Friday Feb. 27, in Room 314, Butler-Carlton Hall on the Missouri S&T campus.
Part of his talk will focus on comparing how much energy existing systems use and how much his can save.
Wang says 0.8 percent of America’s energy use is spent on wastewater treatment. Much of that energy is used to aerate the tanks where wastewater is treated. The energy is used to feed oxygen to the microorganisms that consume the waste, and traditionally wastewater treatment plants maintain an oxygen concentration of 2 milligrams per liter to feed the bugs in the tanks, “which makes them happy,” Wang says.
The prevailing thought has been that providing less than 2 milligrams per liter of oxygen would make the microorganisms “unhappy.” But Wang does not believe that is an issue, saying that if you feed them at a lower concentration, such as 0.5 milligram per liter, it makes them a little less happy, but the microorganisms will live longer and enrich more – plus you use 30 percent less energy during oxygen infusion to produce the same results.
“You can make them a little unhappy,” Wang says, “because bugs do not have a union.”
He has also developed another treatment system called an Alternating Anaerobic-Anoxic-Oxic (A3O) process that “can achieve superior effluent quality since it can remove organic pollutants plus nitrogen and phosphorous nutrients,” Wang says. It does this without chemicals, and its effluent contains only 5 milligrams per liter of total nitrogen and 0.5 milligram per liter of total phosphorous. It also saves more than 10 percent of energy compared to the conventional pre-anoxic process, which has significantly less total nitrogen and total phosphorus removal.
With its high performance, high energy efficiency and low operational costs, on a large scale the technology could help curb global surface water eutrophication, which is one of the National Academy of Engineering’s Grand Challenges – the accessibility of freshwater.
Read more: Missouri S&T researcher cleans wastewater
The Latest on: Wastewater into Fresh Water
via Google News
The Latest on: Wastewater into Fresh Water
- Scottish-IISc researchers develop wastewater treatment, recycling systemon November 29, 2020 at 7:26 am
A team of interdisciplinary researchers from Scotland in collaboration with Indian Institute of Science (IISc) have developed an efficient decentralised wastewater treatment and recycling system at ...
- IISc researchers ‘develop’ wastewater treatment, recycling systemon November 28, 2020 at 7:32 pm
A new study, published in the Journal of Water Process Engineering and carried out in collaboration with researchers in the UK, shows how the system has, over the past year, enabled the reuse of ...
- New Technology Could Generate Electricity From Wastewater And Seawateron November 23, 2020 at 4:00 pm
Then, a rapid exchange of the wastewater effluent with seawater allows the electrodes to reincorporate the sodium and chloride ions, reversing the electric current flow. Energy is recovered during ...
- Using wastewater on farms sparks environmental and health worrieson November 23, 2020 at 2:41 pm
Countries such as Spain, Italy and Greece are facing growing water shortages, in part due to climate change, so they're supplementing traditional fresh water with treated wastewater ... for dishes and ...
- EPA report blames Irish Water over waste wateron November 20, 2020 at 4:11 pm
And, in Inchigeelagh, raw sewage is being discharged into the local lake ... The report lists 13 areas where waste water treatment must improve to protect freshwater pearl mussels or the EPA ...
- Would you drink beer brewed from wastewater?on November 19, 2020 at 1:50 am
Canadian craft brewers and researchers used recyled wastewater to make beer which turned out to taste great. By Leland Jackson. As the Earth's pop ...
- We brewed beer from recycled wastewater, and it tasted greaton November 17, 2020 at 7:16 am
Barriers to reuse One of the barriers to widespread water reuse is the perception that Canada has an endless supply of freshwater ... To turn wastewater into beer, the collaboration took ...
- We brewed beer from recycled wastewater – and it tasted greaton November 16, 2020 at 10:45 pm
One of the barriers to widespread water reuse is the perception that Canada has an endless supply of freshwater ... To turn wastewater into beer, the collaboration took wastewater from a treatment ...
via Bing News