@book{MTMT:34788921, title = {Komposztmester. A közösségi komposztálás kézikönyve}, url = {https://m2.mtmt.hu/api/publication/34788921}, isbn = {9789636230838}, author = {Aleksza, László and Varga, Zsolt and Fekete, György}, publisher = {MATE}, unique-id = {34788921}, year = {2023}, orcid-numbers = {Aleksza, László/0000-0002-6952-6049; Varga, Zsolt/0000-0001-6542-0952; Fekete, György/0009-0005-2675-3224} } @book{MTMT:34184588, title = {A körforgásos gazdaságra történő átállás előkészítési feladatai a mezőgazdasági és zöldhulladékok esetében}, url = {https://m2.mtmt.hu/api/publication/34184588}, isbn = {9789636230760}, editor = {Aleksza, László and Fekete, György}, publisher = {MATE}, unique-id = {34184588}, keywords = {agrárinnováció; MATE Körforgásos Gazdaság Elemző Központ; intézményi hulladékgyűjtés; biohulladék-kezelési technológiák; biomassza alapú mezőgazdaság; oktatás-kutatás; projekt-összefoglaló}, year = {2023}, orcid-numbers = {Aleksza, László/0000-0002-6952-6049; Fekete, György/0009-0005-2675-3224} } @article{MTMT:33781439, title = {Biomethane Potential in Anaerobic Biodegradation of Commercial Bioplastic Materials}, url = {https://m2.mtmt.hu/api/publication/33781439}, author = {Üveges, Zsuzsanna and Damak, Mariem and Klátyik, Szandra and Ramay, Muhammad Wajahat and Fekete, György and Varga, Zsolt and Gyuricza, Csaba and Székács, András and Aleksza, László}, doi = {10.3390/fermentation9030261}, journal-iso = {FERMENTATION-BASEL}, journal = {FERMENTATION}, volume = {9}, unique-id = {33781439}, abstract = {Bioplastics have emerged as a promising alternative to conventional plastics, marketed as environmentally friendly and sustainable materials. They provide a variety of methods for efficient waste management contributing to the goals of the circular economy. At their end-of-life stage, bioplastics can generate added value through aerobic and anaerobic biological treatments (composting or anaerobic digestion). In this study, biomethane potential (BMP) tests were carried out under mesophilic conditions on eight different catering biodegradable plastics available in the market and certified as being biodegradable under industrial composting conditions. Chemical analysis of the biodegradable plastics included elemental analysis, Fourier-transform infrared spectroscopy, and inductively coupled plasma–optical emission spectrometry. Key differences were observed in total solids (TS) and volatile solids (VS) contents between the studied biopolymer products. TS values ranged between 85.00 ± 0.26% (Product 8) and 99.16 ± 0.23% (Product 4), whereas VS content ranged between 64.57 ± 0.25 %wm (Product 6) and 99.14 ± 0.17 %wm (Product 4). Elemental analysis (elements C, H, N, S, and O) was used to estimate the theoretical methane production (ThBMP) of each product. The highest ThBMP (538.6 ± 8.7 NmL/gVS) was observed in Product 4 correlated with the highest C and H contents, while the lowest ThBMP (431.8 ± 6.1 NmL/gVS) was observed in Product 2. Significant differences were recorded between BMP values according to the chemical composition of the polymers. The average of BMP values ranged between 50.4 ± 2.1 NmL/gVS and 437.5 ± 1.0 NmL/gVS. Despite being characterized by the same composition (cellulose/cellulose derivatives and calcium carbonate), Products 2, 3, and 6 revealed significant differences in terms of TS, VS, ThBMP, and BMP. Furthermore, a significant statistical relationship (p < 0.001) was found between time (days) and BMP values of the eight products (R2 = 0.899–0.964) during the initial phase. The study confirmed that cellulose-based materials can convert efficiently under mesophilic conditions into methane, at a relatively short retention time; hence, they can be regarded as a promising material for co-digestion with feedstock in industrial anaerobic biogas plants. In contrast, biodegradation of polylactic acids (PLA) does not occur under mesophilic conditions, and hence, pre-treatment of the polymers is recommended. Moreover, PLA-containing products are highly affected by the presence of other components (e.g., polybutylene adipate terephthalate and cellulose/cellulose derivatives).}, year = {2023}, eissn = {2311-5637}, orcid-numbers = {Damak, Mariem/0000-0002-3911-5572; Ramay, Muhammad Wajahat/0000-0002-0634-1602; Fekete, György/0009-0005-2675-3224; Varga, Zsolt/0000-0001-6542-0952; Székács, András/0000-0001-5816-3775; Aleksza, László/0000-0002-6952-6049} } @article{MTMT:33726079, title = {Biogas Potential and Calorific Value of Different Agricultural Main and By-Product}, url = {https://m2.mtmt.hu/api/publication/33726079}, author = {Gulyás, Miklós and Fekete, György and Varga, Zsolt and Dér, Sándor and Sebők, András and Vojtela, Tibor and Aleksza, László}, journal-iso = {HUNG AGRIC RES}, journal = {HUNGARIAN AGRICULTURAL RESEARCH: ENVIRONMENTAL MANAGEMENT LAND USE BIODIVERSITY}, volume = {3}, unique-id = {33726079}, issn = {1216-4526}, year = {2022}, pages = {11-15}, orcid-numbers = {Gulyás, Miklós/0000-0002-1910-0867; Fekete, György/0009-0005-2675-3224; Varga, Zsolt/0000-0001-6542-0952; Sebők, András/0000-0001-5710-0609; Aleksza, László/0000-0002-6952-6049} } @article{MTMT:33552673, title = {Evaluation of organic wastes as substrates for rearing Zophobas morio, Tenebrio molitor, and Acheta domesticus larvae as alternative feed supplements}, url = {https://m2.mtmt.hu/api/publication/33552673}, author = {Pintér, Richárd and Fekete, György and Varga, Zsolt and Gyuricza, Csaba and Aleksza, László}, doi = {10.33038/jcegi.3508}, journal-iso = {J CENT EUR GREEN INNOV}, journal = {JOURNAL OF CENTRAL EUROPEAN GREEN INNOVATION}, volume = {10}, unique-id = {33552673}, year = {2022}, eissn = {2064-3004}, pages = {143-156} } @article{MTMT:32979786, title = {Effects of Combined Application of Solid Pyrolysis Products and Digestate on Selected Soil Properties of Arenosol and Plant Growth and Composition in Laboratory Experiments}, url = {https://m2.mtmt.hu/api/publication/32979786}, author = {Gulyás, Miklós and Someus, Edward and Klátyik, Szandra and Fuchs, Márta and Varga, Zsolt and Der, Sandor and Fekete, György and Czinkota, Imre and Székács, András and Gyuricza, Csaba and Aleksza, László}, doi = {10.3390/agronomy12061440}, journal-iso = {AGRONOMY-BASEL}, journal = {AGRONOMY (BASEL)}, volume = {12}, unique-id = {32979786}, abstract = {Biochars as soil amendments have been reported to improve soil properties and may have an important role in the mitigation of the consequences of climate change. As a novel approach, this study examines whether biochar and digestate co-application can be utilized as cost-effective, renewable plant nutrients. The effects of two types of biochar-wood chip biochar (WBC) and animal bone biochar (ABC), applied alone or in combination with an anaerobic digestate-on soil physicochemical properties, on the levels of selected elements, and on growth yields of ryegrass were studied in laboratory experiments. Most parameters were significantly affected by the treatments, and the investigated factors (biochar type, application rate, and the presence of digestate), as well as their interactions, were found to have significant effects on the characteristics investigated. The easily soluble phosphorus content (AL-P2O5) of the soil increased in all WBC and ABC biochar treatments, and the presence of digestate caused a further increase in AL-P2O5 in the case of anaerobic digestate-supplemented ABC treatment (ABCxAD). The pH increased in both ABC and WBC treatments, and also in the case of ABCxAD treatments. Similar increases in the salt content were detected in ABC-treated samples and in ABCxAD treatments at higher application rates. WBC increased the water holding capacity and carbon content of the soil. Phytotoxic effects of biochars were not detected, although higher doses resulted in slower germination. Combined biochar-digestate applications resulted in increased plant yields compared to sole biochar treatments. Thus, biochar-digestate combinations appear to be applicable as organo-mineral fertilizers.}, keywords = {soil properties; Anaerobic digestate; animal bone biochar; wood chip biochar; ryegrass growth yield}, year = {2022}, eissn = {2073-4395}, orcid-numbers = {Gulyás, Miklós/0000-0002-1910-0867; Fuchs, Márta/0000-0002-4997-8320; Varga, Zsolt/0000-0001-6542-0952; Fekete, György/0009-0005-2675-3224; Székács, András/0000-0001-5816-3775; Aleksza, László/0000-0002-6952-6049} } @article{MTMT:33104798, title = {EFFECT OF DIFFERENT SUBSTRATE MIXTURES ON CRUDE FAT AND CRUDE PROTEIN CONTENT OF ZOPHOBAS MORIO LARVAE}, url = {https://m2.mtmt.hu/api/publication/33104798}, author = {Pintér, Richárd and Aleksza, László and Fekete, György and Béres, András and Gyuricza, Csaba}, journal-iso = {HUNG AGRIC RES}, journal = {HUNGARIAN AGRICULTURAL RESEARCH: ENVIRONMENTAL MANAGEMENT LAND USE BIODIVERSITY}, volume = {30}, unique-id = {33104798}, issn = {1216-4526}, year = {2021}, pages = {13-16} } @{MTMT:33104719, title = {Effects of combined application of solid pyrolysis products and digestate on selected soil and plant properties in laboratory experiment}, url = {https://m2.mtmt.hu/api/publication/33104719}, author = {Gulyás, Miklós and Edward, SOMEUS and Varga, Zsolt and Fekete, György and Aleksza, László}, booktitle = {Abstract book of the 19th Alps-Adria Scientific Workshop 26th April - 1st May 2020, Wisła, Poland}, unique-id = {33104719}, year = {2020}, pages = {20-20} } @{MTMT:33104704, title = {An investigation on replacement alternatives of the nutrient requirements of microalgae with agricultural byproducts}, url = {https://m2.mtmt.hu/api/publication/33104704}, author = {Fekete, György and Varga, Zsolt and Aleksza, László and Gulyás, Miklós and Czinkota, Imre}, booktitle = {Abstract book of the 19th Alps-Adria Scientific Workshop 26th April - 1st May 2020, Wisła, Poland}, unique-id = {33104704}, year = {2020}, pages = {31-31} } @article{MTMT:31591571, title = {Evaluation of Organic Wastes as Substrates for Rearing Zophobas morio, Tenebrio molitor, and Acheta domesticus Larvae as Alternative Feed Supplements}, url = {https://m2.mtmt.hu/api/publication/31591571}, author = {Harsányi, Endre and Juhász, Csaba and Kovács, Elza and Huzsvai, László and Pintér, Richárd and Fekete, György and Varga, Zsolt and Aleksza, László and Gyuricza, Csaba}, doi = {10.3390/insects11090604}, journal-iso = {INSECTS}, journal = {INSECTS}, volume = {11}, unique-id = {31591571}, year = {2020}, eissn = {2075-4450}, orcid-numbers = {Fekete, György/0009-0005-2675-3224; Varga, Zsolt/0000-0001-6542-0952; Aleksza, László/0000-0002-6952-6049} }