Wastewater reclamation through a physical-chemical pilot and two disinfection systems (ozone and chlorine dioxide) combination

2003 ◽  
Vol 3 (3) ◽  
pp. 161-165
Author(s):  
M. Folch ◽  
E. Huertas ◽  
J.C. Tapias ◽  
M. Salgot ◽  
F. Brissaud
Keyword(s):  
Chlorine Dioxide ◽  
Research Development ◽  
Wastewater Reclamation ◽  
Demonstration Program ◽  
Whole Process ◽  
Physical Chemical ◽  
Wastewater Disinfection ◽  
First Results ◽  
Negative Impacts

The DRAC, (“Desinfecció i Reutilització d'Agües Residuals a Catalunya”, Wastewater disinfection and reuse in Catalonia - Spain), project is included in a RDD (Research, Development, and Demonstration) program. The project arises from the necessity to define reclamation treatments guaranteeing an effluent with enough quality to be reused with a minimal microbiological risk. This paper presents the first results obtained from the combination of a physical-chemical pilot and two disinfection pilot systems: ozone and chlorine dioxide. The combination of physical-chemical and disinfection systems allows the use of lower doses of disinfectants, thus minimising the negative impacts of the whole process and improving the reliability of the reclamation facilities.

Comparison of different advanced disinfection systems for wastewater reclamation

2002 ◽  
Vol 2 (3) ◽  
pp. 213-218 ◽  
Author(s):  
M. Salgot ◽  
M. Folch ◽  
E. Huertas ◽  
J. Tapias ◽  
D. Avellaneda ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Chlorine Dioxide ◽  
Chemical Treatment ◽  
Treatment Plant ◽  
The Other ◽  
Wastewater Reclamation ◽  
Sand Filter ◽  
Whole Process ◽  
Physico Chemical ◽  
Negative Impacts

Several lines of reclamation have been tested in the Palamós/Vall-Llobrega (Girona, Spain) wastewater treatment plant. Each line consists of a filtration treatment (infiltration-percolation, sand filter, ring filter and physico-chemical treatment) plus a disinfection system (UV, peracetic acid, chlorine dioxide and ozonation). Every combination has been evaluated and compared with the other possibilities. This combination of filtration and disinfection allows the use of lower doses of disinfectants, thus minimising the negative impacts of the whole process and improving the reliability of the reclamation facilities.

scholarly journals Sulfonated Hydrothermal Carbons from Cellulose and Glucose as Catalysts for Glycerol Ketalization

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 804 ◽  
Author(s):  
Fernández ◽  
Fraile ◽  
García-Bordejé ◽  
Pires
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Flow Reactor ◽  
Chemical Properties ◽  
Textural Properties ◽  
Catalytic Synthesis ◽  
Physical Chemical ◽  
Treatment Conditions ◽  
First Results ◽  
Work Up

Solketal is one of the most used glycerol-derived solvents. Its production via heterogeneous catalysis is crucial for avoiding important product losses typically found in the aqueous work-up in homogeneous catalysis. In this work, we present a study of the catalytic synthesis of solketal using sulfonated hydrothermal carbons (SHTC). They were prepared from glucose and cellulose resulting in different textural properties depending on the hydrothermal treatment conditions. The sulfonated hydrothermal carbons were also coated on a graphite microfiber felt (SHTC@GF). Thus, up to nine different solids were tested, and their activity was compared with commercial acidic resins. The solids presented very different catalytic activity, which did not correlate with their physical-chemical properties indicating that other aspects likely influence the transport of reactants and products to the catalytic surface. Additionally, the SHTC prepared from cellulose showed better reusability in batch reaction tests. This work also presents the first results for the production of solketal in a flow reactor, which opens the way to the use of SHTC@GF for this kind of reactions.

Reliability of Low P Technologies in the Real World — First Results from a Two-Year Demonstration Program

2011 ◽  
Vol 2011 (1) ◽  
pp. 1013-1036 ◽  
Author(s):  
Mario Benisch ◽  
Casey Fisher ◽  
Don Keil ◽  
Dave Clark ◽  
J.B. Neethling
Keyword(s):  
Real World ◽  
Demonstration Program ◽  
The Real ◽  
First Results

scholarly journals Theory into practice: basic connections and stylistic affiliations of the Late Neolithic settlement at Pusztataskony-Ledence 1

2019 ◽  
pp. 147-178
Author(s):  
Katalin Sebők ◽  
Norbert Faragó
Keyword(s):  
Ceramic Material ◽  
Stylistic Analysis ◽  
Population Movement ◽  
Archaeological Record ◽  
Research Development ◽  
Late Neolithic ◽  
Resource Analysis ◽  
Symbolic Communication ◽  
First Results ◽  
Cultural Traits

Despite being positioned in the western fringes of the Tisza culture’s occupation area, the Late Neolithic settlement at Pusztataskony-Ledence 1 is seemingly well separated from the communities of the Lengyel complex. The character of its archaeological record however, together with recent results in the research of connections between the two cultural complexes raises the possibility of an amalgamation of these traditions at some point. In 2016, a grant of the National Research, Development and Innovation Office allowed us to start a threeyear-long project, aimed to process the data gained at Pusztataskony over three seasons in order to reveal foreign cognitive elements in the archaeological record of the site other than the ones observed in the burials. To match possible population movement with the appearance of Lengyel type cultural traits and understand the situation observed here classical archaeological and bioarchaeological analyses had been carried out. The current study surveys the first results of the investigations focusing on the archaeological record from one of the house clusters in the settlement. The examinations include a basic typological and resource analysis of the lithics and a stylistic analysis of the ceramic material. The interpretation focuses on the site’s contact system as outlined by the archaeological record, on the ceramic inventory as a medium of everyday symbolic communication here, as well as on our recent understanding of the character of contacts between the Tisza and Lengyel populations in the Middle and Upper Tisza Region.

Wastewater reclamation systems in small communities

2007 ◽  
Vol 55 (7) ◽  
pp. 149-154 ◽  
Author(s):  
L. Alcalde ◽  
M. Folch ◽  
J.C. Tapias ◽  
E. Huertas ◽  
A. Torrens ◽  
...  
Keyword(s):  
Chlorine Dioxide ◽  
Removal Rate ◽  
Low Cost ◽  
Small Scale ◽  
Wastewater Reclamation ◽  
Small Communities ◽  
Physico Chemical ◽  
Wastewater Reclamation And Reuse ◽  
Pre Treatment ◽  
Chlorine Dioxide Disinfection

The demands established in the rules and regulations by the administration in Catalonia seem to exclude small communities from wastewater reclamation and reuse, due to the comparatively high costs associated with the practice at small scale. In the framework of the DRAC project (Demonstration on Wastewater Reclamation and Reuse in Catalonia) two different pre-treatment systems, one extensive (infiltration–percolation) and another intensive (ring filter), each one followed by chlorine dioxide disinfection, were tested in order to be applied for small communities wastewater reclamation and reuse. The results of this study show that infiltration–percolation systems remove very efficiently physico-chemical contaminants and microorganisms. The ring filter system does not show a significant removal rate of contaminants. The use of infiltration–percolation as a pre-treatment for advanced chemical disinfection allows reducing the dose of disinfectant and the contact time needed to achieve a specific water quality, and diminishes disinfection by-products (DBPs) generation. Therefore, this reclamation line is suitable for small communities due to its efficiency and low cost. However, further studies are needed in relation to the removal mechanisms of microorganisms, organic compounds in IP systems and the possible DBPs formation using chlorine dioxide.

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