SONOZONE TREATMENT ON WASTEWATER TO BE REUSED
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SONOZONE TREATMENT ON WASTEWATER TO BE REUSED. UNIVERSITY OF UDINE. Department of Chemistry, Physics and Environment. Prof. Goi Daniele, Dott.ssa Rossi Giada. Via del Cotonificio 108, 33100 Udine Friuli Venezia Giulia Italy Email: [email protected] , [email protected] Tel: +39.0432.558827

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SONOZONE TREATMENT ON WASTEWATER TO BE REUSED

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Sonozone treatment on wastewater to be reused

SONOZONE TREATMENT ON WASTEWATER TO BE REUSED

UNIVERSITY OF UDINE

Department of Chemistry, Physics and Environment

Prof. Goi Daniele, Dott.ssa Rossi Giada

Via del Cotonificio 108, 33100 Udine

Friuli Venezia Giulia

Italy

Email: [email protected], [email protected]

Tel: +39.0432.558827

Fax: +39.0432.558803


Sonozone treatment on wastewater to be reused

ENVIRONMENTAL ENGINEERING TEAM

Prof. Eng. Daniele Goi

Expert in environmental sanitary engineering.

PhD Giada Rossi

Expert in advanced oxidation processes for wastewater treatment.

Eng. Valentina Cabbai

Expert in wastewater treatment modeling.


Sonozone treatment on wastewater to be reused

Disinfection(coliforms, E.coli, Salmonella spp., Enterococcus spp.)

Pollutants treatment (aromatic compounds, surfactants, formaldeyde)

Nutrient preservation (phosphate, nitrogen)

REUSE

GOAL

WASTEWATER TREATMENT ON PRIMARY EFFLUENT


Sonozone treatment on wastewater to be reused

OZONATION

SONICATION

APPLIED TECHNOLOGIES


Sonozone treatment on wastewater to be reused

PARAMETERS CONSIDERED

CHEMICAL PARAMETERS

MICROBIOLOGICAL PARAMETERS

COD

Salmonella spp.

Total coliforms

Phosphate

E.coli

Formaldeyde

Enterococcus spp.

MBAS anionic surfactants

UV254

Total nitrogen


Sonozone treatment on wastewater to be reused

MAX ABATMENT

COD46%

UV25442 – 52 %

MBAS97 %

FORMALDEYDE48 %

COLIFORMS99,9992 %

E.coli99,98 %

Enterococcus spp.99,92 %

Salmonella spp.99,98 %


Sonozone treatment on wastewater to be reused

Low frequence ultrasounds used as a pre-treatment don't induce pollutants and microorganisms abatement, but they have only a mechanical activity.

Organic matter inside the system is easier to oxidize by ozone thanks to particulate substance disaggregation due to sonication. Sonolitic pretreatment at low frequencies can increase ozone oxidative efficiency.

Phosphate and nitrogen concentrations don't vary during sonozone treatment: wastewater characteristics, useful for carbon, nitrogen and phosphorus reintegration in the water-ground system, are preserved.

CONCLUSIONS


Sonozone treatment on wastewater to be reused

Sonozone technology optimizes surfactants and bacteria abatement better than the application of the single techniques.

Anionic surfanctants (MBAS) are degraded by sonozone in the same way if we use a longer ozone treatment and an higher dose of chemical oxidant.

Sonozone disinfection efficiency is more evident on E.coli and coliforms otherwise is less efficient on enterococci.

CONCLUSIONS


Sonozone treatment on wastewater to be reused

Several types of wastewater, from civiland industrial wastewater plants, have to be tested for sonozone treatment, in order to prove process effectiveness on samples with different characteristics in terms of organic load, suspended solids and pollutants.

Design and use of pilot plant have to be pursued in order to test bigger volumes of wastewater and simulate real plants function.

In addition, it may be interesting to evaluate the treatment from an economic point of view, calculating costs and energy efficiency in order to identify whether the application can compete with the solutions already existing. Preliminary data indicate that the combined used of ultrasonic and ozone treatment could reduce the costs due to the chemical disinfectant.

FURTHER RESEARCH


Sonozone treatment on wastewater to be reused

The R&D results suggested that sonozone technique is suitable for the use in agro-industrial sector, in particular to treat wastewater, rich in surfactant and bacterial load, to be reuse.

This process treatment could be even applied in wastewater treatment, to refine secondary treatment, in order to implement disinfection and abatement of refractory pollutants. The process should be applied on small plants treating wastewater from little communities or productive realities.

A possible application could be the treatment of wastewater on boards, from mobile kitchens and hospitals, in camping, small settlements or mountain retreat placed in areas of particular environmental interest.

FURTHER APPLICATIONS


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