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Ecoterra, No. 18, pp. 11-12, 2008

Primăria Municpiului Zalău

Abstract: Located in the North-Western part of Romania, between Eastern and Western Carpathian Mountains, Salaj county has 3864,48 km2, which represent 1,6 % of the Romanian territory. The natural heritage of the county is extremely valuable; there are15 natural protected areas of national interest, covering an total area of 516,73 ha. Three of them: Racâş-Hida Narcissus Glade, Tusa-Barcău Landscape Reserve and Măgurici Cave are declared site of communitarian interest, as par of NATURA 2000 network.
There are also very important cultural heritage: 68 wooden churches, 27 stone churches, 4 fortifications, 9 castle, 4 halls and 59 others monuments. Human settlements beginning with Neolithic prove the existence of human kind on these territories; the wall paintings from Cuciulat Cave, are unique in the South East Europe. A major archeological site is the Roman Capital Porolissum, where we can admire the ruins of two Roman amphitheatres and a church along with many protecting walls and towers.
Key words: Sălaj county, natural heritage, cultural heritage, protected areas, NATURA 2000 network

Ecoterra, No. 18, p. 13, 2008

Alexandru Sabin BĂDĂRĂU
Universitatea Babeş-Bolyai din Cluj-Napoca, Facultatea de Ştiinţa Mediului

Abstract: This article is an essay to reveal the losses suffered by both the natural and cultural heritage of the Apuseni Mountains due to the rising tide of the modern world pressure. The phenomena of globalization and “banalisation” of the flora, fauna and cultural backgrounds are both severe „diseases” in a global and regional perspective.
Key words: Apuseni Mountains, natural heritage, globalization

Ecoterra, No. 18, pp. 16-17, 2008

Complexul Muzeal Bistriţa-Năsăud

Abstract: Bistriţa-Năsăud is one of the Romania’s counties of which natural patrimony has not suffered an aggressive and continuous anthropic impact. This territory has got a great number of remarkable natural areas: national parks, national reservations, protected natural sites, monuments, species etc. Also, here originate several remarkable academicians, scientist, writers.
Key words: Bistriţa-Năsăud county, natural patrimony, anthropic impact, natural reserve, rare species

Ecoterra, No. 18, pp. 22-23, 2008

Nicolae GIURGIU, Maria MILEA
S.C. Minesa S.A. Cluj
Ana Despina IONESCU
INDCF-ICCF, Bucureşti
Universitatea Babeş-Bolyai din Cluj-Napoca

Abstract: In the first part of the article we will describe the particularities of the mineral water, the principal types of water we can find in Romania. It is important to know what our resources are, what we can do with them, and how we can rationally exploit them. Many areas in the world are confronting these days with water problem (especially drought) so in this context we have to find the right way to use what we have. In Romania we can find 35 % of all mineral water from Europe. We have about 2500 sources of mineral water. The main producer is “Societatea Naţională a Apelor Minerale SA” who posses 85 % of supply. The importance of a mineral water is given by his chemical composition even though these days the ads sell the products. Our study objective is represented by the salt water with a high mineralization placed in Cluj district: the salt water from Cojocna, Baita, Baile Someseni, Piatra Rat. The watering places for the moment presents only a local interest but the places mentioned earlier have great therapeutically properties, so there are well justified the efforts for modernizing the places and to expand the fittings out. Next in the article we will make a short and succinct presentation of Băile Someşeni, Cojocna, Piatra Rât, Băiţa. In the last part of the article we will sumarise the main steps we have taken so far in our study.
Key words: mineral water, natural resources, therapeutically properties, Cluj county

Ecoterra, No. 18, pp. 24-26, 2008

Sevastiţa VRACIU, Monica-Violeta NEAŢĂ, Nicolae ŞERBAN
ICIM Bucureşti
S.C. ICPE Bistriţa S.A.

Abstract: The wastewater treatment in biofilters is an aerobic treatment procedure where the microorganisms culture, biologically is fixed on an inert media. So, this inert media could be a filling granular material (gravel, volcanic rock, slag, ceramics, plastics etc.) where the biofilm grow and then it treats the wastewater with content of lightly biodegradable organic matter and with relative low concentrations. In this study was designed and experimented a model of multistage mobile aerobic biofilter. This model simulates the natural conditions for organisms develope from the chain levels of detritic nutrition, these levels being represented by saprophytes, bacterivores, carnivores, advanced carnivores and detrivorous. For the operating mode characterization of treatment multistage equipment was sampled wastewater from inlet and outlet pipes of treatment model, samples analysed in ICIM’s laboratories. Among the determined items it was specified that the BOD5 removel was from 171 mg/L to 13 mg/L, which it means a treatment efficiency about 92 %. It is showed that the treated wastewater respects the limits governed by NTPA 001/2005 in the case of all determined items obtaining superior efficiency by removing polutants so far as the influent wastewater exceed the maximum limits taked into account at the equipment design (NTPA 002/2005).
Key words: wastewater treatment, mobile biofilter, biodegradable organic matter, biological step

Ecoterra, No. 18, pp. 27-29, 2008

Technical University of Cluj Napoca, Department of Automation
Ghent University, EeSA Department
Grigore VLAD
S.C. ICPE Bistriţa S.A.
Technical University of Cluj Napoca, Department of Automation

Abstract: The purpose of this paper is to use simple PID controllers and techniques as auto-tuning and parameter scheduling to control the output pollutant substrate concentration. The auto-tuning method is simple and as other auto-tuning techniques, does not require an advanced knowledge of control engineering theory. A wide range of parameter changes and non-linearities of the plant can be handled. Experiments and simulation studies are based on direct exploitation of the non-linear wastewater treatment dynamical model, obtained from mass balance equations and they indicate that the presented method performs well and can be easily used even by people who are not specialist in automatic control.
Key words: wastewater treatment, pollutant, parameters, equation, mathematical modelling

Ecoterra, No. 18, pp. 32-34, 2008

S.C. ICPE Bistriţa S.A.

Abstract: Waste water treatment processes use a wide range of chemical reactants. Ozone, like a stronger oxidizer, is often use in order to decay the concentration of some chemical pollutants below the maximum permitted level by regulations. In this paper we made some experimental studies about cyanides oxidation from waste waters using gaseous ozone. Using theoretical considerations and our experimental studies we found an optimal ozone dose and we made numerical simulations in order to design ozone contact towers. 
Key words: wastewater treatment, ozone, cyanides oxidation, simulation

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