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Start Over Descriptor "Dujinimas" Topic sewage sludge
2 results on '"Dujinimas"'

1. Biomasės ir atliekų dujinimo tyrimai Lietuvoje: esama būklė ir ateities perspektyvos.

Author

Striūgas, Nerijus, Šlančiauskas, Anupras, Zakarauskas, Kęstutis, Stravinskas, Giedrius, Paulauskas, Rolandas, and Vorotinskienė, Lina

Abstract

The practical application of biomass gasification in Lithuania is not known. For many years, the scientists from Lithuanian Energy Institute (LEI) have been working in the field of biomass and other waste material gasification, leading to the development of scrap tire gasification technology, research of gasification and combustion of solid organic waste and glycerol and catalytic removal of tar compound from producer gas produced by biomass gasification, as well as developed and introduced for widespread application in industry the equipment for liquid and gaseous fuel combustion. The available experience facilitated the development of technology for biomass and waste material gasification whose main feature is to produce gas by biomass gasification for application in process technologies. This article reviews the research carried out in the Laboratory of Combustion Processes at LEI for the last ten years and the main results of experimental research in gasification of various types of biomass and waste material. As an output of these activities, the prototype equipment was developed for gasification of intact scrap tires and pelletized biomass and waste material, including dried wastewater treatment sludge. Novel scientific knowledge was acquired about the composition of producer gas, its calorific value and physical properties. The features and optimum conditions have been identified for gasification of biomass and waste material in the developed prototypes leading to the generation of the most calorific gas. Design and control properties were identified, and proposals were drawn up for more powerful equipment. Proposals for further enhancements of the equipment were outlined. The article also estimates the present situation and prospects of gasification technologies in Lithuania. [ABSTRACT FROM AUTHOR]

Published
2016

2. Sunkiaisiais metalais užteršto nuotekų dumblo panaudojimas energetinių miškų tręšimui ir dujinimui maišant su medienos biomase

Author

Praspaliauskas, Marius, Pedišius, Nerijus, and Vytautas Magnus University

Subjects
Dujinimas, Wood biomass, Sunkieji metalai, Heavy metals, Fuel parameters, Nuotekų dumblas, Sewage sludge, Kuro parametrai, Power and Thermal Engineering, Medienos biomasė, Gasification
Abstract

Susidarantys nuotekų dumblo kiekiai ateityje didės, kadangi šalyje panaudojant ES paramą plėtojamas vandentiekio ir nuotekų surinkimo tinklas. Nuotekų dumblas yra neišvengiamas nuotekų valymo proceso produktas, kuriame yra labai daug kenksmingų medţiagų. Dumblo perdirbimo ir panaudojimo galimybės Europoje pastaruoju metu intensyviau plėtojamos. Naujausios nuotekų dumblo panaudojimo galimybės, turinčios labai didelį mokslininkų susidomėjimą yra šios: deginimas (išgaunant energiją), drėgnas oksidavimas, pirolizė, dujinimas, deginimas kartu su kuru, kuris yra naudojamas energijai išgauti (pvz. biokuras). Darbo metu nagrinėtos dvi dumblo panaudojimo galimybės energetikoje: dumblas, kaip trąša energetinių ţeldinių plantacijose ir dumblo dujinimas maišant su medienos biomase. Pirmoje darbo dalyje atliktas prieš 19 metų pasodintos energetinių ţeldinių plantacijos tyrimas. Tyrimo metu nustatytas medienos masės prieaugis ir sunkiųjų metalų pasisavinimas. Antroje darbo dalyje nustatyti dumblo ir jo mišinių su medienos biomase pagrindiniai kuro parametrai: drėgmė, šilumingumas, CHNS-O kiekiai, peleningumas, sunkieji metalai. Atlikta termogravimetrinė dumblo ir jo mišinių su medienos biomase analizė pagal pasirinktus dujinimo parametrus, kai pastoviai keliama temperatūrą 20 ˚C /min iki 995˚C, o oro padavimas yra 5 %, 10 % ir 17,5 %. The amount of formed sewage sludge will be on the increase because of development of plumbing and wastewater accumulation network when using EU support in the country. Sewage sludge is inevitable product of the process when cleaning the wasterwater, there are a lot of harmful materials in it. The opportunities to reprocess and use sewage sludge in Europe are increasing more intensively recently. Scientists are interested in those newest opportunities to use sewage sludge: combustion (extracting energy), wet oxidation, pyrolisis, gasification, combustion with fuel, which is used to obtain energy (e. g. biofuels). During the work there were pending two opportunities how to resort sewage sludge in energetics: sewage sludge as a fertiliser in energetic plantations and the gasification of sewage sludge mixing it with biomass of wood. There was done the analysis of the 19 years old plantation of power afforests in the first part of work. During the analysis the increase of wood-pulp and the assimilation of hevy metals were found. During the second part of work there were established the main fuel parameters of sewage sludge and its compounds with wood-pulp: moisture, calorific value, amounts of CHNS-O, ash-content, heavy metals. Thermogravimetric analysis of sewage sludge and its compounds with wood-pulp was done by the selected gasification parameters, when the temperature is constantly raising to 995 ˚C every 20 ˚C /min, and the innings of air is 5 %, 10 % and 17,5 %.

Published
2013

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