9 research outputs found
The Dignity of Women and the Example of Mary according to John Paul II
Marija je svim ljudima ā ženama i muÅ”karcima uzor. Ona je slika Crkve, slika onoga Å”to svaki Äovjek mora postiÄi, a to je svetost, posluÅ”nost i vjeÄni život s Bogom. Ona je to ostvarila jer je bila od Boga izabrana i izrekla svoje āfiatā. Bez njezina slobodna pristanka Bog ne bi mogao svijet otkupiti roÄenjem Isusa Krista. Uzor je u materinstvu i djeviÄanstvu, u darivanju sebe drugome i postizanju bliskog jedinstva s Bogom Å”to je zapravo i cilj postojanja. Iako je uzor svim ljudima, na poseban je naÄin uzor ženama koje po njezinu uzoru mogu postiÄi duboko jedinstvo s Bogom, ostvariti svoju istinsku bit i postati āÄuvaricama ljudskoga srcaā. U tome leži njezino posebno dostojanstvo. Dostojanstvo žene po uzoru na Mariju na poseban je naÄin razvijeno u dokumentima āRedemptoris Materā i āMulieris dignitatemā Ivana Pavla II. koji su u temelju razvijanja ove teme.Mary is a role model to all - women and men. She is the image of the Church, the image of what every human being must achieve: holiness, obedience and eternal life with God. She accomplished all this because she was chosen by God and pronounced her āfiatā. Without her free consent, God could not have redeemed the world with the birth of Jesus Christ. She is a role model in motherhood and in virginity, in giving oneself to another and in attaining close union with God, what is the very purpose of existence. Although she is a role model to all, Mary is particularly a role model to women who, following her example, can achieve a deep union with God and their true essence, and become ākeepers of the human heartā. Therein lies her special dignity. The dignity of women modeled on Mary was developed especially by John Paul II in the documents āRedemptoris Materā and āMulieris Dignitatemā that underlie the development of this topic
BIODEGRADATION OF AZO DYE BY ADAPTED MIXED MICROBIAL CULTURES
Wastewater effluents from azo dye production and other dye-stuff using industries contain significant amounts of highly resistant azo dyes that require special treatment processes to prevent groundwater contamination. The present study is based on the approach of aerobic followed by anaerobic step for biodegradation and decolorization of azo dye. The main objective of this work was the adaptation, isolation and preparation of mixed microbial culture, from laboratory collection, catabolically able to biodegrade under aerobic conditions bordo azo dye present in mother lye after industrial production of that dye. The anaerobic step needed for biodegradation of azo dye was performed by the use of adapted active anaerobic sludge from a wastewater treatment plant of the sugar industry. The adapted aerobic and anaerobic microbial cultures demonstrated significant biodegradative enzymatic potential and can be further used for development of a continuous aerobic ā anaerobic process for the treatment of wastewater from industrial production of azo dye
Nitrogen Removal with Aerobic Granules ā Effect of Dissolved Oxygen and Carbon/Nitrogen Ratio
Nitrogen removal efficiency related to the dissolved oxygen (DO) concentration (DO 1ā7Ā mgĀ lā1), carbon/nitrogen ratio (COD/N 1ā14), and the effect of airflow (0.4ā2.9Ā lĀ minā1) related to the granule size were investigated. The average chemical oxygen demand (COD) removal of ā„Ā 90Ā % was achieved at COD/NĀ ā„Ā 11, but the satisfactory N values in effluent for discharge into the surface waters were almost achieved at COD/N 14. DO of 2Ā mgĀ lā1 is recommended for efficient removal of N and COD with mature granules. The size (diameter) of the granules decreases with increased airflow
BioloŔka denitrifikacija
Ubrzani napredak industrije, poljoprivrede i domaÄinstva su pogodovali poviÅ”enim koncentracijama duÅ”ika u vodenom ekosustavu, Å”to uzrokuje
eutrofikaciju. DuŔik se iz otpadne vode uklanja procesom bioloŔke denitrifikacije. U ovom preglednom radu dan je osvrt na denitrifikaciju, s aspekta
mikroorganizama, koncentracije otopljenog kisika, donora i akceptora elektrona
Aerobni granulirani mulj u obradi otpadnih voda: mehanizam granulacije i svojstva aerobnih granula
Aerobni granulirani mulj (AGS, engl. Aerobic Granular Sludge) predstavlja obeÄavajuÄu tehnologiju u obradi otpadnih voda kuÄanstva i industrije.
Aerobne granule su samoimobilizirane mikrobne nakupine, bez nosaÄa, a karakterizira ih kompaktna gusta struktura, visoko zadržavanje biomase,
visoka uÄinkovitost uklanjanja oneÄiÅ”Äenja i svojstvo brzog taloženja. Na formiranje i stabilnost aerobnog granuliranog mulja utjeÄu brojni
Äimbenici, poput koncentracija otopljenog kisika, vrijeme prozraÄivanja, vrsta izvora ugljika, sile smicanja, period gladovanja, vrijeme taloženja.
Zbog slojevite strukture granule, sa vanjskim aerobnim slojem i anoksiÄnim i anaerobnim zonama prema srediÅ”tu granule, moguÄe je istovremeno
uklanjanje C, N i P. AGS tehnologija ima potencijal smanjenja infrastrukture i operativnih troÅ”kova proÄiÅ”Äavanja otpadnih voda. Ovaj rad daje
pregled najnovijih spoznaja iz literature o mehanizmu granulacije i svojstvima aerobnih granula
Nitrogen removal from wastewater using granulated activated sludge
Aerobni granulirani mulj formiran je iz aktivnog mulja u SBR reaktoru, uz acetat kao izvor ugljika. PoveÄanje omjera KPK/N povoljno djeluje na uklanjanje N, P i KPK. UÄinkovitost uklanjanja N s poveÄanjem omjera KPK/N od 1 do 23 se poveÄala od 40% do 80%, kao i uklanjanje KPK od 57% do 96%. S poveÄanjem omjera KPK/N do vrijednosti omjera KPK/N 17 zabilježen je trend poveÄanja uÄinkovitosti uklanjanja P te je pri omjeru KPK/N 17 odreÄena najveÄa uÄinkovitost uklanjanja P od 69,3%, a daljnjim poveÄanjem omjera KPK/N uÄinkovitost uklanjanja P se smanjivala. S porastom protoka zraka postiže se veÄa koncentracija otopljenog kisika, raste uÄinkovitost uklanjanja KPK, meÄutim, uÄinkovitost uklanjanja N i P raste s poveÄanjem koncentracije otopljenog kisika do 2 mg/L dok se daljnjim poveÄanjem koncentracije otopljenog kisika uÄinkovitost uklanjanja N i P snižava. Rezultati pokazuju trend smanjenja promjera granule s poveÄanjem protoka zraka. Primjenom FISH metode u aerobnom granuliranom mulju dokazani su mikrobni klasteri odgovorni za procese nitritacije, nitratacije, denitrifikacije, uklanjanja fosfora (PAOs), anoksiÄno uklanjanje fosfora uz NOā-N i NOā-N kao akceptore elektrona (DPAOs), i pohranjivanje glikogena (GAOs).Aerobic granular sludge was formed from activated sludge in an SBR reactor, with acetate as a carbon source. Increasing the COD/N ratio has a favorable effect on N, P and COD removal. N removal efficiency with increasing COD/N ratio from 1 to 23 increased from 40% to 80%, as well as COD reduction form 57% to 96%. With the increase of the COD/N ratio to the COD/N 17, a trend of increasing P removal efficiency was recorded, and at the COD/N ratio of 17, the highest P removal efficiency of 69.3% was determined, and with a further increase in the COD/N ratio, the P removal efficiency was reduced. With an increase in air flow, a higher dissolved oxygen concentration is achieved, COD removal efficiency increases, however, the N and P removal efficiency increases with an increase in the dissolved oxygen concentration up to 2 mg/L, while a further increase in the dissolved oxygen concentration decreases the N and P removal efficiency. The results show a trend of decreasing granule diameter with increasing air flow. Using the FISH method in aerobic granular sludge, microbial clusters responsible for nitritation, nitration, denitrification, phosphorus removal (PAOs), anoxic phosphorus removal with NOā-N and NOā-N as electron acceptors (DPAOs), and glycogen storage (GAOs) were proven
Nitrogen removal from wastewater using granulated activated sludge
Aerobni granulirani mulj formiran je iz aktivnog mulja u SBR reaktoru, uz acetat kao izvor ugljika. PoveÄanje omjera KPK/N povoljno djeluje na uklanjanje N, P i KPK. UÄinkovitost uklanjanja N s poveÄanjem omjera KPK/N od 1 do 23 se poveÄala od 40% do 80%, kao i uklanjanje KPK od 57% do 96%. S poveÄanjem omjera KPK/N do vrijednosti omjera KPK/N 17 zabilježen je trend poveÄanja uÄinkovitosti uklanjanja P te je pri omjeru KPK/N 17 odreÄena najveÄa uÄinkovitost uklanjanja P od 69,3%, a daljnjim poveÄanjem omjera KPK/N uÄinkovitost uklanjanja P se smanjivala. S porastom protoka zraka postiže se veÄa koncentracija otopljenog kisika, raste uÄinkovitost uklanjanja KPK, meÄutim, uÄinkovitost uklanjanja N i P raste s poveÄanjem koncentracije otopljenog kisika do 2 mg/L dok se daljnjim poveÄanjem koncentracije otopljenog kisika uÄinkovitost uklanjanja N i P snižava. Rezultati pokazuju trend smanjenja promjera granule s poveÄanjem protoka zraka. Primjenom FISH metode u aerobnom granuliranom mulju dokazani su mikrobni klasteri odgovorni za procese nitritacije, nitratacije, denitrifikacije, uklanjanja fosfora (PAOs), anoksiÄno uklanjanje fosfora uz NOā-N i NOā-N kao akceptore elektrona (DPAOs), i pohranjivanje glikogena (GAOs).Aerobic granular sludge was formed from activated sludge in an SBR reactor, with acetate as a carbon source. Increasing the COD/N ratio has a favorable effect on N, P and COD removal. N removal efficiency with increasing COD/N ratio from 1 to 23 increased from 40% to 80%, as well as COD reduction form 57% to 96%. With the increase of the COD/N ratio to the COD/N 17, a trend of increasing P removal efficiency was recorded, and at the COD/N ratio of 17, the highest P removal efficiency of 69.3% was determined, and with a further increase in the COD/N ratio, the P removal efficiency was reduced. With an increase in air flow, a higher dissolved oxygen concentration is achieved, COD removal efficiency increases, however, the N and P removal efficiency increases with an increase in the dissolved oxygen concentration up to 2 mg/L, while a further increase in the dissolved oxygen concentration decreases the N and P removal efficiency. The results show a trend of decreasing granule diameter with increasing air flow. Using the FISH method in aerobic granular sludge, microbial clusters responsible for nitritation, nitration, denitrification, phosphorus removal (PAOs), anoxic phosphorus removal with NOā-N and NOā-N as electron acceptors (DPAOs), and glycogen storage (GAOs) were proven
RužiÄka days : International conference 19th RužiÄka Days āToday Science ā Tomorrow Industryā : Proceedings
Dear colleagues, we are extremely honoured to present to you the Proceedings of the international conference 19th RužiÄka Days, which was successfully held on September 21ā23, 2022, in Vukovar, Croatia, in the hometown town of our famous Croatian scientist and first Nobel laureate, professor Leopold (Lavoslav) RužiÄka. The main goals of the Conference were to promote excellence, originality and innovation of interdisciplinary scientific research as well as the practical application of the obtained results through collaboration with industry, emphasizing thus the recognizable slogan of the RužiÄka Days conference: "Today Science ā Tomorrow Industry". In addition, the Conference gave the opportunity for meetings, exchanging the ideas, opinions, experiences and cooperation among participants from different working surroundings. It is also important to point out that since 2008, within the international conference RužiÄka Days, Meeting of Young Chemists has also been held, where high school students, with the help of their mentors, present papers in the field of chemistry, with the aim to direct students and young people to the technical and natural sciences, especially chemistry. In its seventh issue (2011, 2013, 2015, 2017, 2019, 2021) the Proceedings publishes scientific and professional full papers of high quality in the following sections: Chemical analysis and synthesis (10), Chemical and biochemical engineering (3), Food technology and biotechnology (4), Chemistry in agriculture and forestry (1), Environmental protection (9) and 8th Meeting of Young Chemists (3). Full-length papers were subjected to an international review procedure done by eminent experts from the corresponding fields, to whom we express our gratitude, but they were not subjected to linguistic proofreading. On behalf of the Scientific and Organizing Committee of the 19th RužiÄka Days we cordially thank all the authors, reviewers, participants, lecturers, organizers, especially the international organizers EuCheMS and EHEDG, auspices and sponsors, and all the others who, in any way, supported the Conference and contributed to the preparation of the Proceedings, especially to our highly skilled and committed associates, who have put a lot of effort in the preparation of these Proceedings. At the very end, special thanks to our young, future scientists and their mentors who are faithful participants of the Meeting of Young Chemists of the RužiÄka Days conference. Enjoy the extremely interesting scientific and professional papers contained in these Proceedings, until the next 20th jubilee of RužiÄka Days in 2024! We are looking forward to meeting you again in Vukovar! Yours sincerely, Chief Editors Jurislav BabiÄ Vesna OceliÄ BulatoviÄ Dajana KuÄiÄ Grgi