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Municipal WWTPs & DWTPs Sector
Water Treatment and Disinfection

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Soluciones para Desinfección del agua en Sector Muniicpal

Water Disinfection and Filtration

Municipal Sector WWTPs and DWTPs


Water resources are under increasing pressure, causing water scarcity and quality problems. In particular, climate change, Unpredictable weather patterns and droughts are contributing significantly to the pressure on freshwater availability, resulting from urban development and agriculture.

This reality of our time has forced Public Administrations to promote solutions for greater reuse of treated wastewater. -limiting the extraction of surface water masses and groundwater bodies, reducing the impact of treated water discharges on the water bodies and promoting water savings through multiple uses of urban wastewater - while ensuring a high level of protection of the environment and which has resulted in Regulation 2020/741 of the European Parliament.

The reuse of wastewater is an essential strategy for treatment plants in these regions and Ultrafiltration systems as well as UV disinfection and elimination of emerging contaminants, also using Ozone, are key technologies in the treatment schemes.

Without forgetting that WWTPs are facilities that generate strong odors and require deodorization technologies to treat sulfur compounds. hydrogen, mercaptan, ammonia and VOCs (Volatile Organic Compounds) among others.

Most common applications

UV and Ozone disinfection systems are mainly used to improve the supply of drinking water, in applications such as the elimination of the protozoan Cryptosporidium -a chlorine-resistant parasite-, a barrier to the protozoan Giardia -the Traditional chlorine-based disinfection methods require high concentrations and contact times and reduction of viruses that can cause serious risks to the health of consumers. As examples we have adenovirus, rotavirus and poliovirus.

On the other hand, its application in tertiary treatments in WWTPs has been used for years due to its excellent technical and economic viability.

In addition, we develop solutions for the treatment of specific contaminants in water, called emerging contaminants that are increasingly present in water. due to the pressure of human activity on underground and surface water masses.

Drinking waters
The new American government legislation – a global reference – is changing the way communities look at safeguarding their supplies. of drinking water. Regulations such as the Environmental Agency USEPA "Long Term 2 Enhanced Surface Water Treatment Rule" (requires treatment of Cryptosporidium) or the "Ground Water Rule" (requires 4-log virus treatment) has increased the use of these systems to complement systems existing disinfection systems. This treatment strategy is known as “multiple barrier protection”.

Waste water
The vast majority of WWTPs around the world provide secondary treatment through activated sludge processes. The secondary processes are effective upstream of UV disinfection as they remove particles and improve water clarity.

Typical disinfection standards, such as 200 fecal coliforms per 100 mL geometric mean in 30 days, are easily achievable with a system appropriately sized. These typically conventional wastewater treatment plants discharge effluents to water bodies such as lakes, rivers and streams.

UV light is an ideal disinfectant for these applications since it does not alter the quality characteristics of the water - except by deactivating the microorganisms. The addition of filtration upstream of UV, although not necessary in most cases, improves water quality by removing more particles and allows wastewater treatment plants to meet the most stringent requirements.
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Advanced Oxidation Processes (AOP) through the application of UV in combination with peroxide hydrogen (H2O2) to break down toxic contaminants -Nitrosamines, 1,4-Dioxane, volatile organic components (VOCs), fuels and fuel additives - into safe elemental components.

An innovative and cost-effective solution to eliminate chemical compounds in drinking and wastewater, allowing its reuse in recreational irrigation and agricultural, recharge aquifers and to reduce pressure on already depressed water masses.

Increasingly, water companies are taking advantage of the dual capabilities of UV light to simultaneously disinfect and treat water. contaminants (via UV photolysis and UV oxidation) such as taste and odor compounds, nitrosamines (NDMA), pesticides and algal toxins.

UV light converts hydrogen peroxide into highly reactive hydroxyl radicals (OH-).
Hydroxyl radicals attack and decompose pollutants.
At the same time, UV light disinfects the water.
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We provide highly reliable drinking water solutions in municipalities to meet the critical demand for drinking water.

Implementing effective treatment options that comply with ever-changing government regulations. The removal of contaminants, inorganic and pathogenic compounds such as E-coli, Cryptosporidium and Giardia cysts/oocysts are especially interest, since these components can negatively affect public health.

As water scarcity and environmental regulations increase, municipal customers are turning to increasingly to advanced wastewater treatment. The purification of wastewater and the reuse of water can help minimize discharges, reduce contaminants or provide an alternative supply of fresh water.

Treating surface water can be challenging due to seasonal fluctuations, turbidity phenomena, or disposal requirements. of specific contaminants. Our microfiltration (MF), ultrafiltration (UF) and reverse osmosis (RO) membrane technologies enable municipalities successfully comply with strict drinking water legislation.

Proven water reuse solutions for municipalities.

Strict municipal wastewater effluent regulations are driving investment in new treatment technologies. The filtration by membrane has proven to be an effective solution for wastewater treatment or water recycling, improving the quality of the secondary effluent, leading to new opportunities for wastewater reuse.

Membrane-treated water can be considered for reinjection into aquifers, irrigation, and reuse in industrial processes.
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Mobile Plants
Mobile water treatment provides additional capacity and rapid treatment for both long-term installations and short-term emergency aid. With microfiltration (MF) and ultrafiltration (UF) membrane technology, mobile water offers solutions in containers for municipal and industrial applications.

Global Fleet of Rapidly Deployable Mobile Water Solutions.

Aria™ FAST mobile water units can provide a long-term solution or temporary relief from emergencies for municipal and industrial water treatment applications.

Our containerized systems install quickly and easily to start producing high-quality waterin just four hours after installation. your arrival at your destination, delivering the water you need, when and where you need it.

Membrane treatment technologies available on mobile trailers:
- Microfiltration (MF)
- Ultrafiltration (UF)
- Reverse Osmosis (RO) / Closed Circuit Reverse Osmosis (CCRO)

The units are available in a variety of capacities, ranging from 10 - 320 m3/h, the highest capacity on the market.
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Primary Filtration
Primary wastewater treatment:
The Salsnes Filter system is the only system you need for the primary treatment of municipal wastewater, as it can replace completely conventional primary treatmentsuch as sedimentation tanks or decanters. Using a filter mesh rotary, this system can remove >50% TSS and >20% BOD from raw wastewater.

This improved filtration system requires only one tenth of the surface footprint and 30-60% of the investment cost of conventional systems. Additionally, sludge thickening and dewatering are integrated into this compact and cost-effective system.

Improvement of existing primary wastewater systems:
With our population constantly growing, many WWTPs are faced with the need to increase treatment capacity, but they have limited or no space to install additional treatment equipment.

The Salsnes Filter system is designed for situations like this, with a requirement of less than 10% of the surface of the sedimentation and clarifier tanks. By augmenting current primary systems with this filtration system, wastewater treatment plants can increase the capacity of treatment using the existing land.

There is also the option to adapt your decanter or clarifier as a secondary treatment while installing this rotating filter mesh system just for the primary treatment. This can increase capacity by up to 50%.

Primary wastewater treatment for biological systems:
A Salsnes Filter system can remove >20% BOD from raw wastewater to reduce loads and increase waste treatment capacity. downstream processes.

- Oxidation channels
- Sequential Biological Reactors (SBR)
- Biological Aerated Filters (BAF)
- Dissolved Air Flotation (DAF) - Moving bed bioreactors (MBBR)
- Membrane bioreactors (MBR)

Combined wastewater (CSO) and stormwater treatment discharges:
There is increasing awareness of the adverse environmental effects of untreated stormwater and CSO discharges into the environment. This has led regulatory bodies to impose improvements in facilities in many municipalities.

The Salsnes Filter system is ideal for stormwater and CSO treatment because, unlike other technologies, it has consistent solids removal rates within a wide range of flow rates.
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Photoionization - Clean, high-performance and sustainable process over time, backed by +400 facilities in operation.

Technology based on the use of UV lamps in combination with a catalyst giving rise to the formation of radicals oxygen and hydroxyl, among others, strongly oxidizing. Especially indicated in treatment plants close to urban centers as they are areas of high sensitivity, bad odors with a high contaminant load and/or fluctuating concentrations.

Main advantages vs conventional systems:
- Effective treatment of all odorous substances (not just H2S).
- High treatment performance: 99.x% reduction of bad odor-generating compounds.
- Effective treatment of high odor concentrations.
- Effective treatment of fluctuating odor concentrations.
- Low investment costs (occupation of a small surface, small bench, does not require peripheral equipment).
- Low operating costs: only electricity is required for operation - no water, no chemicals.
- Low maintenance costs: replacing consumables only every 1 to 2 years.
- ON/OFF technology - there are no adaptation times or inertia until nominal performance is reached.
- Flexible installation: units can be installed indoors/outdoors, above ground/underground. Control panel on the side of the unit or mounted separately.
- Minimum surface footprint.
- Fully automatic operation.
- There is no need for local control.
- Optional Ex protection.
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