Journal of Sustainable Development of Energy, Water and Environment Systems – Volume VI

The Journal of Sustainable Development of Energy, Water and Environment Systems (JSDEWES) is an international journal dedicated to the improvement and dissemination of knowledge on methods, policies and technologies for increasing the sustainability of development by de-coupling growth from natural resources and replacing them with knowledge based economy, taking into account its economic, environmental and social pillars, as well as methods for assessing and measuring sustainability of development, regarding energy, transport, water, environment and food production systems and their many combinations. In total 48 manuscripts were published in Volume VI, all of them reviewed by at least two reviewers. The Journal of Sustainable Development of Energy, Water and Environment Systems would like to thank reviewers for their contribution to the quality of the published manuscripts

Journal of Sustainable Development of Energy, Water and Environment Systems – Volume VII

The Journal of Sustainable Development of Energy, Water and Environment Systems (JSDEWES) is an international journal dedicated to the improvement and dissemination of knowledge on methods, policies and technologies for increasing the sustainability of development by de-coupling growth from natural resources and replacing them with knowledge based economy, taking into account its economic, environmental and social pillars, as well as methods for assessing and measuring sustainability of development, regarding energy, transport, water, environment and food production systems and their many combinations. In total 48 manuscripts were published in Volume VII, all of them reviewed by at least two reviewers. The Journal of Sustainable Development of Energy, Water and Environment Systems would like to thank reviewers for their contribution to the quality of the published manuscripts

Journal of Sustainable Development of Energy, Water and Environment Systems – Volume II

The Journal of Sustainable Development of Energy, Water and Environment Systems – JSDEWES is an international journal dedicated to the improvement and dissemination of knowledge on methods, policies and technologies for increasing the sustainability of development by de-coupling growth from natural resources and replacing them with knowledge based economy, taking into account its economic, environmental and social pillars, as well as methods for assessing and measuring sustainability of development, regarding energy, transport, water, environment and food production systems and their many combinations. In total 32 manuscripts were published in Volume II, all of them reviewed by at least two reviewers. The Journal of Sustainable Development of Energy, Water and Environment Systems would like to thank reviewers for their contribution to the quality of the published manuscripts

Journal of Sustainable Development of Energy, Water and Environment Systems – Volume III

The Journal of Sustainable Development of Energy, Water and Environment Systems - JSDEWES is an international journal dedicated to the improvement and dissemination of knowledge on methods, policies and technologies for increasing the sustainability of development by de-coupling growth from natural resources and replacing them with knowledge based economy, taking into account its economic, environmental and social pillars, as well as methods for assessing and measuring sustainability of development, regarding energy, transport, water, environment and food production systems and their many combinations. In total 32 manuscripts were published in Volume III, all of them reviewed by at least two reviewers. The Journal of Sustainable Development of Energy, Water and Environment Systems would like to thank reviewers for their contribution to the quality of the published manuscripts

Journal of Sustainable Development of Energy, Water and Environment Systems – Volume V

The Journal of Sustainable Development of Energy, Water and Environment Systems – JSDEWES is an international journal dedicated to the improvement and dissemination of knowledge on methods, policies and technologies for increasing the sustainability of development by de-coupling growth from natural resources and replacing them with knowledge based economy, taking into account its economic, environmental and social pillars, as well as methods for assessing and measuring sustainability of development, regarding energy, transport, water, environment and food production systems and their many combinations. In total 42 manuscripts were published in Volume V, all of them reviewed by at least two reviewers. The Journal of Sustainable Development of Energy, Water and Environment Systems would like to thank reviewers for their contribution to the quality of the published manuscripts

Microfauna role in assessing the quality of activated sludge

Razvojem tehnologije i društva povećava se i potreba za pročišćavanjem otpadnih voda. Iako je pročišćavanje, zbog očuvanja vodenih resursa, neophodno, radi se o vrlo skupom postupku, pa je samim time njegova primjena vrlo mala. Aktivni mulj je flokularna tvorevina koja se sastoji od bakterija, protozoa, metazoa i suspendiranih čestica organske tvari. U biološkom pročiščavanju voda najveću ulogu imaju bakterije zatim protozoa i metazoa. Uloga tih organizama očituje se u postupku pročišćavanja vode, u kojem u svoju biomasu ugrađuju organske tvari iz otpadne vode i stvaraju kao produkt plinove i nerazgradivi ostatak. Utvrđeno je da amebe prevladavaju prilikom pokretanja sustava, dok je prisutnost bičaša uz amebe znak toksičnog preopterećenja sustava. Prisutnost slobodno plivajućih trepetljikaša je indikator dobrog operativnog sustava. Pričvršćeni trepetljikaši su dobri bioindikatori toksičnosti jer prelaze u slobodno plivajuće oblike kada su izloženi nepovoljnim uvjetima. Kolnjaci su znak stabilnog aktivnog mulja i nalazimo ih tijekom povoljnih uvjeta. Svaka od ovih vrsta govori o različitoj vrsti opterećenja sustava za pročišćavanje otpadnih voda. S obzirom da biološka aktivnost mikroorganizama ovisi o nizu parametara (temperatura, pH, koncentracija otopljenog kisika, vrsti i koncentraciji otopljenih tvari) izvrsni su indikatori kvalitete aktivnog mulja, jer njihova brojnost i raznolikost govori i o sposobnosti pročišćavanja otpadnih voda aktivnim muljem.Development of technology and society is increasing the need for wastewater treatment. Although the treatment plant it is necessary in order to preserve water resources, but it is a very expensive procedure, and therefore its use is very small. The activated sludge is follicular construction consisting of bacteria, protozoa, metazoa, and suspended particles of organic matter. The biological treatment of water have the greatest role of bacteria and protozoa then metazoa. The role of these organisms is reflected in the water purification process, which in its biomass incorporated organic matter from wastewater and produce a product gas and not degradable rest. It was found that the amoebae predominate at system startup, while the presence of flagellates to amoebae is a sign of toxic overload the system. The presence of free-floating ciliates is a good indicator of the operating system. Attached ciliates are good bio-indicators of toxicity in crossing the free-swimming forms when exposed to such conditions. Brachionus are a sign of a stable activated sludge and found them during favorable conditions. Each of these types of talks on different kind of loading system for wastewater treatment. Given that the biological activity of microorganisms depends on a number of parameters (temperature, pH, concentration of dissolved oxygen, the type and concentration of dissolved substances in the water) are excellent indicators of the quality of sludge, because of their abundance and diversity of talking about the quality and capacity of activated sludge wastewater treatment

Predation avoidance in shallow lakes

Istraživanje zooplanktona provedeno je tijekom ljetnog razdoblja 2012. godine u tri vodena tijela različitog postanka, morfometrije, stupnja trofije, prokrovnosti i sastava makrofita: na rukavcu rijeke Sutle, mrtvaji Škrčev kut i šljunčari Zajarki. Osnovne hipoteze ovog rada bile su: (i) širina zone makrofita i kompleksnost građe habitusa značajno utječu na raznolikost i brojnost zooplanktona i predaciju riba; (ii) makrofitske sastojine utječu na abiotičke i biotičke čimbenike vodenih ekosustava. Ciljevi istraživanja zooplanktona i ihtiofaune bili su utvrditi: 1) raznolikost i brojnost zooplanktona u jezerima sa submerznim i flotantnim sastojinama; 2) utjecaj predacije riba na sastav i veličinsku strukturu zooplanktona u jezerima s različitim sastojinama makrofita; 3) utjecaj makrofita i predacije riba na brojnost ženki zooplanktona s jajašcima. Analiza fizikalno-kemijskih čimbenika ukazala je na značajne razlike između tri lokaliteta što je utjecalo na sastav biocenoza i pokrovnost makrofitima. Najveća brojnost zooplanktona i ženki s jajašcima zabilježena je u eutrofnoj mrtvaji Škrčev kut, sa srednjom pokrovnošću flotantnim makrofitima, dok je najmanja brojnost i raznolikost zooplanktona zabilježena u šljunčari Zajarki velike prozirnosti i male trofije. Rukavac Sutle je odvojen u dva bazena: Gornji bazen veće prozirnosti i pokrovnosti submerznim makrofitima, veće raznolikosti zooplanktona i izraženije predacije riba i Donji bazen, veće mutnoće i bez makrofita, manje raznolikosti zooplanktona, a veliku brojnost postigle su sitne detritivorne vrste kolnjaka i veslonožaca. Postaje na kojima je zabilježena najveća brojnost i raznolikost zooplanktona nalazile su se u litoralnoj zoni čime je potvrđena uloga makrofita kao zaklona od predacijskog pritiska. Na lokalitetu veće prozirnosti, šljunčari Zajarki, utvrđena je veća brojnost zooplanktona, kao i ženki s jajašcima u pridnenom sloju vode, što potvrđuje da i u plitkim jezerima postoje vertikalne, a ne isključivo horizontalne migracije. Na sva tri lokaliteta u zooplanktonu dominirale su od Rotifera vrste roda Brachionus te vrste Kerratella cohlearis i Trichocerca similis, od Copepoda vrsta Macrocyclops albidus i ličinački stadiji dok je kod Cladocera prevladavala vrsta Bosmina longirostris.The zooplankton research was conducted during the summer period of 2012 in three water bodies of different origins, morphometry, trophic level, coverage and composition of macrophytes: on the back water of the Sutla River, oxbow Škrčev kut and gravel pit Zajarki. The main hypotheses of this study were: (i) width of macrophytes stands and their architecture significantly impact diversity and abundance of zooplankton as well as fish predation; (ii) macrophyte stands affect the abiotic and biotic factors of aquatic ecosystems. The research goals were to determine: 1) diversity and abundance of zooplankton in lakes with submerged and floating macrophyte stands; 2) impact of fish predation on composition and size structure of zooplankton in lakes with different stands of macrophytes; 3) impact of macrophyte and fish predation on zooplankton fecundity. The analysis of physico-chemical parameters showed statistically significant spatial differences between three water bodies which affected the composition of the biocenoses and macrophytes coverage. The highest abundance of zooplankton and females with eggs was recorded in eutrophic oxbow Škrčev kut, with medium coverability of floating macrophytes, while the lowest abundance and diversity of zooplankton was observed in the gravel pit Zajarki with high transparency and low trophic level. The back water of Sutla River is separated in the Upper basin with higher transparency and macrophyte coverage, higher zooplankton diversity and more pronounced fish predation, and in the Lower basin of higher turbidity, without macrophytes, smaller diversity where detritivorous species of Rotifera and Copepoda accomplished higher abundance. Stations that have recorded the higher abundance and diversity of zooplankton were in the littoral zone, which confirmed the role of macrophytes as a shelter from predation pressure. Fish predation affected on zooplankton and females with eggs horizontal migration in the littoral zone with macrophytes or their vertical migration into the deeper water layers. At all three locations in zooplankton composition dominated Rotifera with Kerratella cohlearis, Trichocerca similis and Brachionus species, Copepoda with Macrocyclops albidus and larval stages while in Cladocera dominated species was Bosmina longirostris

Meaning in Life and Materialism as Mediators of the Relationship Between Dispositional Awe and Tourist Eudaimonic Well-Being

Dispositional awe has previously been positively linked to subjective well-being, directly and indirectly, through meaning in life and materialism. There hasn’t been much research that considered these relationships in the context of tourist eudaimonic well-being. Hence, the main goal of the present study is to check whether dispositional awe relates to tourist eudaimonic well-being and whether meaning in life and materialism can serve as underlying mechanisms behind this relationship. Data was collected from a sample of 322 adults through self-report online questionnaires. Model 4 in PROCESS (Hayes, 2018) was used to investigate the parallel mediation effects and the direct effect hypothesized in this study. The two parallel mediators were meaning in life and materialism. The dispositional awe was modelled as a predictor, and tourist eudaimonic well-being as an outcome variable. Mediation analysis confirmed a significant, positive direct path from dispositional awe to tourist eudaimonic well-being. Bootstrap analysis indicated that meaning in life, not materialism, mediated this relationship. Based on this research, it can be concluded that those tourists who are more prone to experience awe might give their lives more meaning, promoting eudaimonic well-being during the touristic trips