WASTEWATER DISINFECTION RESOURCES
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![GettyImages-92231292 wastewater sludge]( "The Real Cost Of Wastewater Treatment: MBR Reshapes The Equation")
For years, conventional activated sludge (CAS) has been the default in wastewater treatment. But the industry is changing.
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![Municipal Effluent Treatment In India]( "Municipal Effluent Treatment In India")
Discover how an agency balanced effective disinfection while minimizing environmental impact and ensuring the safety of both the public and workers in its wastewater treatment practices.
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![chemical addition process wastewater treatment plant-GettyImages-505212240]( "Strategies For Enhancing pH Control Systems In Wastewater Treatment")
Managing pH in wastewater treatment is a crucial undertaking for water utilities. Solid contaminants often receive more attention, as they're more obvious threats, but sub-optimal pH levels can be dangerous, too. -
![GettyImages-450010497 Tel Aviv Israel]( "Hot Water Disinfection For International Hotel Chain, Israel")
See how an Israeli hotel chain slashed energy costs by 27% while ensuring Legionella compliance through innovative UV water disinfection technology.
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![GettyImages-1787572930 dairy treatment plant]( "Pasteurized Equivalent Water Treatment At High Desert Milk, Idaho, US")
Learn how High Desert Milk, a cooperative in Idaho, optimized their water treatment process using HOD™ UV technology, ensuring FDA compliance while significantly reducing water and energy consumption.
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![HOD UV positioned at the outlet of the PW tank]( "Disinfection For Purified Water Loop For Kamada Pharmaceuticals, Israel")
An Atlantium HOD™ (Hydro-Optic Disinfection) UV system was installed at the outlet of a PW tank to serve as the primary disinfection barrier, with water circulating through the system at 6m³/hr before reaching the points of use.
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![Facility]( "RO Membranes' Protection At Pinghu Power Plant, China")
A power plant in Pinghu, Zhejiang Province in China needed to replace the use of chemical biocides and protect boiler feed make-up water from anaerobic and aerobic bacterial growth and associated biofouling.
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Read about how the installation of the HOD UV technology has been a viable non-chemical means for biological control and membrane protection for Trimble County.
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The Archer Daniels Midland Company (ADM) requires full-scale nonchemical disinfection and dechlorination treatment of RO feedwater to the boiler which supports their cottonseed processing facility in Lubbock, Texas.
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![Bucket Fig4_Alternative_Lebanon - Flooding]( "Improving The Resilience Of A UV System For Wastewater Disinfection")
One important consequence of climate change for wastewater treatment plants is that they now need to cope with sudden increases in the effluent volume with the receiving waterbodies equally carrying more water and being in flood conditions. This is especially true for the final treatment step — disinfection prior to discharge.
WASTEWATER DISINFECTION VIDEOS
In this episode of The Water Online Show, host Angela Godwin speaks with Scott Bindner of Trojan Technologies at the AWWA ACE event in Denver. Bindner introduces Trojan’s latest innovation: a compact, mobile demonstration unit for UV advanced oxidation processes (UV AOP).
ABOUT WASTEWATER DISINFECTION
Wastewater disinfection takes place after primary, secondary and sometimes tertiary wastewater treatment. It is typically a final step to remove organisms from the treated water before the effluent is released back into the water system. Disinfection prevents the spread of waterborne diseases by reducing microbes and bacterial numbers to a regulated level.
A variety of physical and chemical methods are used to disinfect wastewater prior to it being released into natural waterways. Historically, the chemical agent of choice for municipal wastewater treatment has been chlorine, due to its disinfecting properties and low cost. However, the rising cost of chlorine and concerns that low chlorine concentrations can still be toxic to fish and other wildlife, has given rise to more physical methods of wastewater disinfection being adopted such as ozonation or ultraviolet (UV) light.
The use of ozone as a disinfection agent has the added benefit of increasing the dissolved oxygen content of the treated wastewater. However, because the ozone has to be generated, ozonation can require prohibitive up-front capital expenditure compared to traditional chlorination. UV disinfection has been growing in popularity as a wastewater disinfection method, in large part because of the life-cycle economics of the equipment and the fact that, like ozone, there is no toxic residual.