Biodegradability of the organic fraction of municipal solid waste

Problematika rasta ukupnih količina otpada jedan je on najvažnijih ekoloških problema današnjice. Cjelovit sustav gospodarenja otpadom daje nam jasne naputke i mjere u svrhu rješavanja ovog problema. Jedna od najistaknutijih mjera jest primjena procesa obrade otpada kako bi se smanjila količina otpada na odlagalištima te dobili vrijedni resursi. U ovom radu provedena je procjena biorazgradivosti organske frakcije iz miješanog komunalnog otpada. Rezultati pokazuju da je udio biorazgradive frakcije u miješanom komunalnom otpadu u prosjeku visok i iznosi 73,62±1,50 %. Visoka prosječna vrijednost omjera BPK5/KPK od 0,78±0,04 ukazuje na mogućnost biološke obrade.The problem of increase in total waste is one of the most important environmental problems of today. A comprehensive waste management system gives us clear instructions and measures to tackle this problem. One of the most important measures is the application of the waste treatment process to reduce the amount of waste in landfills and recover valuable resources. In this work, an evaluation of the biodegradability of the organic fraction of mixed municipal waste was carried out. The results show that the content of biodegradable fraction in mixed municipal waste is high on average and is 73.62±1.50 %. A high average value of BOD5/COD ratio of 0.78±0.04 indicates the possibility of biological treatment

Biodegradability of the organic fraction of municipal solid waste

Problematika rasta ukupnih količina otpada jedan je on najvažnijih ekoloških problema današnjice. Cjelovit sustav gospodarenja otpadom daje nam jasne naputke i mjere u svrhu rješavanja ovog problema. Jedna od najistaknutijih mjera jest primjena procesa obrade otpada kako bi se smanjila količina otpada na odlagalištima te dobili vrijedni resursi. U ovom radu provedena je procjena biorazgradivosti organske frakcije iz miješanog komunalnog otpada. Rezultati pokazuju da je udio biorazgradive frakcije u miješanom komunalnom otpadu u prosjeku visok i iznosi 73,62±1,50 %. Visoka prosječna vrijednost omjera BPK5/KPK od 0,78±0,04 ukazuje na mogućnost biološke obrade.The problem of increase in total waste is one of the most important environmental problems of today. A comprehensive waste management system gives us clear instructions and measures to tackle this problem. One of the most important measures is the application of the waste treatment process to reduce the amount of waste in landfills and recover valuable resources. In this work, an evaluation of the biodegradability of the organic fraction of mixed municipal waste was carried out. The results show that the content of biodegradable fraction in mixed municipal waste is high on average and is 73.62±1.50 %. A high average value of BOD5/COD ratio of 0.78±0.04 indicates the possibility of biological treatment

Biodegradability of the organic fraction of municipal solid waste

Problematika rasta ukupnih količina otpada jedan je on najvažnijih ekoloških problema današnjice. Cjelovit sustav gospodarenja otpadom daje nam jasne naputke i mjere u svrhu rješavanja ovog problema. Jedna od najistaknutijih mjera jest primjena procesa obrade otpada kako bi se smanjila količina otpada na odlagalištima te dobili vrijedni resursi. U ovom radu provedena je procjena biorazgradivosti organske frakcije iz miješanog komunalnog otpada. Rezultati pokazuju da je udio biorazgradive frakcije u miješanom komunalnom otpadu u prosjeku visok i iznosi 73,62±1,50 %. Visoka prosječna vrijednost omjera BPK5/KPK od 0,78±0,04 ukazuje na mogućnost biološke obrade.The problem of increase in total waste is one of the most important environmental problems of today. A comprehensive waste management system gives us clear instructions and measures to tackle this problem. One of the most important measures is the application of the waste treatment process to reduce the amount of waste in landfills and recover valuable resources. In this work, an evaluation of the biodegradability of the organic fraction of mixed municipal waste was carried out. The results show that the content of biodegradable fraction in mixed municipal waste is high on average and is 73.62±1.50 %. A high average value of BOD5/COD ratio of 0.78±0.04 indicates the possibility of biological treatment

Bioremediation of leachate from biowaste

Povećanje broja stanovnika i rastuća industrijalizacija rezultirali su znatnim količinama otpada i onečišćenja okoliša diljem svijeta. Sa sve većim izazovima u održivom gospodarenju otpadom, problematika otpada postaje sve izraženija. Procjedne vode, koje nastaju kao tekući nusproizvodi prolaskom kroz otpadne materijale, posebno su zabrinjavajuće zbog svoje složenosti i visokog sadržaja organskih tvari. Njihovo ispuštanje u prirodne vodotokove može štetno utjecati na okoliš. Biološka obrada procjednih voda postaje odlučujući čimbenik u njihovom upravljanju, pri čemu se mikroorganizmi koriste za uklanjanje onečišćujućih tvari i poboljšanje kvalitete vode. Među različitim postupcima biološke obrade, bioremedijacija se ističe kao učinkovit pristup zbog svoje održive prakse i ekološke prihvatljivosti. U ovom radu provedena je bioremedijacija procjedne vode iz biootpada u šaržnim i submerznim uvjetima. Fizikalno-kemijskim i mikroskopskim analizama dobiven je uvid u tijek procesa biorazgradnje prisutnih organskih onečišćujućih tvari. Svjetlosnom mikroskopijom dobiven je brzi uvid u promjene sustava tijekom procesa bioremedijacije. Učinkovitost bioremedijacije procjedne vode iz biootpada iznosila je 89 %.Population growth and increasing industrialization have led to considerable amounts of waste and environmental pollution in all regions around the world. With the increasing challenges of sustainable waste management, waste-related problems are becoming more and more apparent. Leachates, the liquid by-products of the passage of waste materials, are particularly problematic due to their complexity and high organic content. Their discharge into natural watercourses can have harmful effects on the environment. Biological treatment of leachates is becoming increasingly important in their management, using microorganisms to remove pollutants and improve water quality. Among the various biological treatment methods, bioremediation stands out as an effective approach due to its sustainable practices and ecological acceptability. In this study, the bioremediation of leachate from biowaste was carried out under batch and submerged conditions. Physico-chemical and microscopic analyzes provided information on the course of the biodegradation process of the organic pollutants present. Light microscopy provided a quick insight into the system changes during the biodegradation process. The efficiency of bioremediation of leachate from biowaste was 89 %

Bioremediation of leachate from biowaste

Povećanje broja stanovnika i rastuća industrijalizacija rezultirali su znatnim količinama otpada i onečišćenja okoliša diljem svijeta. Sa sve većim izazovima u održivom gospodarenju otpadom, problematika otpada postaje sve izraženija. Procjedne vode, koje nastaju kao tekući nusproizvodi prolaskom kroz otpadne materijale, posebno su zabrinjavajuće zbog svoje složenosti i visokog sadržaja organskih tvari. Njihovo ispuštanje u prirodne vodotokove može štetno utjecati na okoliš. Biološka obrada procjednih voda postaje odlučujući čimbenik u njihovom upravljanju, pri čemu se mikroorganizmi koriste za uklanjanje onečišćujućih tvari i poboljšanje kvalitete vode. Među različitim postupcima biološke obrade, bioremedijacija se ističe kao učinkovit pristup zbog svoje održive prakse i ekološke prihvatljivosti. U ovom radu provedena je bioremedijacija procjedne vode iz biootpada u šaržnim i submerznim uvjetima. Fizikalno-kemijskim i mikroskopskim analizama dobiven je uvid u tijek procesa biorazgradnje prisutnih organskih onečišćujućih tvari. Svjetlosnom mikroskopijom dobiven je brzi uvid u promjene sustava tijekom procesa bioremedijacije. Učinkovitost bioremedijacije procjedne vode iz biootpada iznosila je 89 %.Population growth and increasing industrialization have led to considerable amounts of waste and environmental pollution in all regions around the world. With the increasing challenges of sustainable waste management, waste-related problems are becoming more and more apparent. Leachates, the liquid by-products of the passage of waste materials, are particularly problematic due to their complexity and high organic content. Their discharge into natural watercourses can have harmful effects on the environment. Biological treatment of leachates is becoming increasingly important in their management, using microorganisms to remove pollutants and improve water quality. Among the various biological treatment methods, bioremediation stands out as an effective approach due to its sustainable practices and ecological acceptability. In this study, the bioremediation of leachate from biowaste was carried out under batch and submerged conditions. Physico-chemical and microscopic analyzes provided information on the course of the biodegradation process of the organic pollutants present. Light microscopy provided a quick insight into the system changes during the biodegradation process. The efficiency of bioremediation of leachate from biowaste was 89 %

Ružička days : International conference 19th Ružička Days “Today Science – Tomorrow Industry” : Proceedings

Dear colleagues, we are extremely honoured to present to you the Proceedings of the international conference 19th Ružička Days, which was successfully held on September 21–23, 2022, in Vukovar, Croatia, in the hometown town of our famous Croatian scientist and first Nobel laureate, professor Leopold (Lavoslav) Ružička. 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 Ružička Days conference: "Today Science – 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 Ružička 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 Ružička 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 Ružička Days conference. Enjoy the extremely interesting scientific and professional papers contained in these Proceedings, until the next 20th jubilee of Ružička Days in 2024! We are looking forward to meeting you again in Vukovar! Yours sincerely, Chief Editors Jurislav Babić Vesna Ocelić Bulatović Dajana Kučić Grgi