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Information × Registration Number 0211U000299, 0111U000100 , R & D reports Title Development of sewage sludge utilization technology with producing of hydrogen as a fuel popup.stage_title Head Sokolenko Volodymyr Ivanovych, Registration Date 28-01-2011 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 The carried out experimental researches allowed choosing the optimal physical and chemical parameters for biotechnology of dark fermentation of sewage sludge and characteristics of inoculums, that provides high-rate of biogas generation with the high concentration of hydrogen. It is shown that the most perspective method for intensification of dark fermentation of sewage sludge is previous treatment by alkaline. The same method allows efficient inhibition of the growth of microorganisms, which consume hydrogen. The utilization of the cometabolism for the large-scale sludge treatment technologies is unreasonable. The following parameters of the dark fermentation of sludge with the alkaline pretreatment are optimal: рН 9.5-10.0; atmospheric pressure, which is maintained by the constant hydrogen withdrawal; either mesophilic (T = 35-370С) or thermophilic (T = 50 -550С) temperature conditions. The use of the inoculums from pure cultures of the active hydrogen producers for the fermentation of the microbiologically active organic substrate (activated sludge) is not reasonable according to the economical and technological characteristics of the process. It has been shown that the most promising source of the hydrogen-producing microorganisms in the developing technology is the excess sludge after alkaline pretreatment, which increase economical attraction of the process. The technology has been developed for artificial preparation of biohydrogen of desired concentration using the main components of the H2-CO2 gas mixture. It is shown that presence of water vapors in biohydrogen negatively influences on the process of adsorption separation of the investigated gas mixture, which defined the necessity of study of processes for biohydrogen drying. The most effective zeolite (NaA) is chosen for filling dehumidifier. The adsorption process for separation of basic components of biohydrogen (СО2 and Н2) is studied and the most effective adsorbent (СаА), which has a maximal adsorption capacity on СО2, is chosen. The research of processes of hydrogen absorption and desorption by the new nanostructural materials-hydrogen accumulators on the basis of zirconium alloys and by the activated carbon materials in the wide interval of temperatures and pressure has been begun. The adsorption capacities of these materials amounts about 2…3 gravimetric percents. Rate of hydrogen adsorption and desorption is higher for carbon adsorbents. Power comparison of metal-hydride and cryogenic-adsorption methods of hydrogen accumulation is begun. Experiments proceed on research and optimization of methods for finish purification of hydrogen by means of unevaporable getters and cryogenic-adsorption. Begun development of technological line model for obtaining hydrogen as a fuel which includes of three basic modules: fermenter, line for purification of biohydrogen and unit for hydrogen accumulation. Product Description popup.authors popup.nrat_date 2020-04-02 Close