DEPURATION OF URBAN AND INDUSTRIAL RESIDUAL WATERS

Wastewater treatment consists of eliminating or reducing the physical, chemical and biological contaminants of water to the required quality characteristics. The process is carried out in a Wastewater Treatment Plant (WWTP). Throughout more than 35 years of experience of our company, we have worked with the widest range of possibilities, which allows us to advise and correctly dimension the installation, taking into account the characteristics of the waters to be treated and the casuistry that Surrounds them.

BIOFILT®

High performance combined with low energy costs and easy maintenance, make trickling filters the ideal solution for the treatment of many types of industrial waste, even with high organic pollution, such as: dairy industry, wine industry, confectionery industry or slaughterhouses.

The high surface area filler ordered BIOFILT®, 240m2 / m³ and its high consistency allows high BOD5 reductions in low volumes of filtration and guarantees high performance. Thanks to the filling capacity of not blockage, it is achieved at all times proper air circulation.

Plants can be programmed for different rates of industrial productive processes or for seasonal use on residential areas and municipalities of second homes.

The line is appropriate for the treatment of urban and industrial wastewater, obtaining effluent qualities in accordance with the requirements on discharges set by the rules of the U.E.

FILTERDISC

VITAQUA has developed a compact system of purification plants for urban wastewater that incorporates biological treatment with FILTERDISC.

FILTERDISC treatment achieves a reduction of 93% of BOD5 at the end of each stage.

The main advantage of the FILTERDISC system is its very low energy cost compared to a conventional extended aeration system. The system of bio-discs FILTERDISC consumes a fifth part of energy thanks to it only works with a very low power engine. This energy optimization coupled with low sludge production and the negligible number of spare parts or consumables necessary, makes operating and maintenance costs the most competitive coupled with the contact beds of high surface BIOFILT®.

Advantages of extended aeration systems:

Reduction of operating and maintenance costs
Reduction of noise and odors.
 Minimal visual impact.
Possibility of denitrification.
Facility for future expansion.

 

AERATION LINE

Biological treatment of water by activated sludge and within it, the extended aeration also called total oxidation, is the procedure usually used when it is necessary to obtain high performance in reducing BOD5. Extended aeration line is characterized by its high performance of purification obtaining mineralized sludge, low installation cost and easy maintenance in a small area of occupation with unpleasant odors.

The PM Line consists of precast concrete elements guaranteeing constructions with long durability. On the other hand, it can reach depths of 4m in aeration and decanting, improving substantially plant performances.

The modularity of the plant allows easy expansions and process improvements such as tertiary treatments and nutrient reductions. The PM Line treatment plant can be easily integrated into the landscape, minimizing the environmental and visual impact.

SBR LINE

The SBR (Sequential Batch Reactor) system, a biological water treatment by activated sludge, is also a commonly used procedure when it is necessary to obtain high performance in water purification, also carrying a natural denitrification of them.

After a suitable pretreatment system, the water is treated in a single biological reactor designed and produced in reinforced concrete or GRP. The reactor is characterized by series of repeated sequences of treatment over time.

These phases are filling, biological reaction, decantation, sludge draining and purging. Thanks to this cyclic operation, the system has great flexibility that allows it to adapt to different treatment modalities and possible variations of debugging requirements.

 

MBR SYSTEM

The membrane bioreactor can be installed with submerged membrane modules in the same biological reactor for small facilities or in individual tanks for larger stations. The blocks of membranes allow easy enlargements for its modular features.

Aeration is optimized by an upward continuous flow of bubbles, producing an effect of cleaning in the filter plates. In turn, ensures oxygen content in the activated sludge of the MBR. This efficient method of self-cleaning minimizes the need for chemical cleaning.

Furthermore, the design of the plates and membranes allows the installation of a cleaning system in countercurrent in order to extend the life thereof and maintain constant returns. High debugging performances are achieved even at reuse levels.

IFAS SYSTEM

The use of submerged bed technology in biological wastewater treatment has a number of advantages, such as higher biomass concentration in the bioreactor, best resistance to contamination points and subsequent better sludge settling. Faced with mobile beds submerged, there is the advantage of bed extraction with a simple lifting and cleaning.

It has great flexibility in the treatment process and provides a high degree of debugging, resisting with optimum performance possible hydraulic or pollutant load points.

Simple extensions. No need to expand the volume of the reactor
Combination of a.p. advantages and contact beds
Being fixed, there is good air distribution in the reactor and efficient blowers’ energy

PHYSICO-CHEMICAL TREATMENTS

Physico-chemical processes are particularly suitable for wastewater treatment that are not biodegradable. Also they are used in the partial treatment of water organically degradable, being interesting to use as primary treatment or phase of subsequent biological processes.

The process mainly consists of the addition of coagulants and flocculants to the water to be treated, with a neutralization (if necessary) to proceed later with the precipitation or flotation of sediments, according to each case.

It is required necessarily to introduce a sludge dehydration system. In general, the specific processes for each type of water require different types of additives and different dosages thereof.

 

SLUDGE DEHYDRATION

The extraction of sludge in any treatment plant of biological type, is essential to guarantee the non-exit of regime of the process in specific periods.

Extraction of sludge by self-priming tanks with transfers to larger sewage treatment plants is now uneconomical due to transport costs and the actual discharge rates. On the other hand, the low concentration of solids required for the transfer requires the water to move about 97%, a value that requires the evacuation of large volumes, compared to what is actually retained in the treatment plant itself.

Depending on the type of sludge and the production volume of the WWTP, different technologies are used; From the extraction systems through VIT filter bags for low productions, to systems of higher yield of dryness like presses or press filters.

TERTIARY TREATMENTS

The tertiary treatments allow us, thanks to a final stage, to increase the quality of the effluent and even to reuse the water for irrigation.

 The process consists mainly in the filtration of treated wastewater and disinfection of the same.

 For filtration there are different possibilities, depending on the filter typology and the filtration material and the granulometry of the same. Depending on the volume of water to be treated and the casuistry of each case, VITAQUA advises its customers the most appropriate solution.

 The main technologies for disinfection include ozone, chlorination or UV light. As in the case of filtration, based on the company’s years of experience, the most efficient solution is designed and proposed.