Wyniki wyszukiwania - BazTech

1

Methane and hydrogen production from potato wastes and wheat straw under dark fermentation

Sołowski Gaweł, Konkol Izabela, Shalaby Marwa, Cenian Adam

Chemical and Process Engineering

|

2021

|

Vol. 42, nr 1

3-–13

EN

Batch dark fermentation of wheat straw and boiled potato wastes at volatile suspended solids (VSS) 5 g VSS/L are examined and compared. Investigations on dark fermentation of potatowastes and wheat straw were carried out at different pH and OFR (oxygen flow rate) values and inoculum pretreatment. The obtained hydrogen yield from waste potato was 70 mL/g VSS, while for hydrolysed wheat straw it amounted to 80 mL/g VSS. The optimum conditions for potato dark fermentation are acidic pH 6.0 and OFR 1.0 mL/h, while for the wheat straw, optimal conditions are pH 6.4 and OFR 4.6 mL/h. The comparison revealed a significant difference in hydrogen production due to the type of substrate, inoculum stressing and DF conditions applied.

2

Mineral deposit formation in gas engines during combustion of biogas from landfills and municipal WWTP

Konkol Izabela, Cebula Jan, Bohdziewicz Jolanta, Piotrowski Krzysztof, Sakiewicz Piotr, Piechaczek-Wereszczyńska Magdalena, Cenian Adam

Ecological Chemistry and Engineering. S

|

2020

|

Vol. 27, nr 3

347--356

EN

The biogas produced in municipal wastewater-treatment plants (WWTP) should be cleaned before it can be used as a fuel in internal combustion engines. Efficient running of such engines is possible only subject to using high quality biogas and lubricating oil. Otherwise, biogas impurities in course of complex chemical reactions may form deposits on various engine parts as well as seriously contaminate the lubricating oil. In this paper, mineral deposits containing high concentration of bismuth, silicon, sulphur, calcium and zinc are studied. Silicon deposits demonstrating strong friction properties are formed during combustion of volatile silica compounds. As these deposits build up, abrasion problems, ignition failure and even engine failure result. The bismuth containing deposits comes from bearings degradation, zinc and calcium were derived from the additives present in commercially available lubricating oil, while lead, aluminium, copper, nickel, iron and chromium were introduced by engine wear phenomena. The highest bismuth content was located at the engine cylinder heads and the lowest at the exhaust elements, whereas highest calcium content was registered on the pistons. Silicon containing deposits are highest in the exhaust and lowest at the engine head. Zinc deposits are highest at the piston.

3

Ponowne spojrzenie na biogaz w Polsce

Cebula Jan, Konkol Izabela

Przegląd Techniczny : Gazeta Inżynierska

|

2019

|

nr 14-15

25--28

PL

W artykule przedstawiono ponowne spojrzenie na możliwości wykorzystania biogazu w Polsce. Zwrócono uwagę na biogaz jako sposób zagospodarowania odpadów oraz ochrony powietrza atmosferycznego, wód i gleb. Podkreślono wagę biogazu jako źródła oraz sposobu magazynowania energii odnawialnej przydatnej do stabilizacji sieci elektroenergetycznej. Zwrócono uwagę na wyższość energii z biogazu nad energią atomową.

EN

The article provides a renewed insight into possibilities of using biogas in Poland. Attention is paid to biogas as a way of waste management and protection of air, water and soil. The importance of biogas as a source and method of storing renewable energy useful for stabilizing the power grid was emphasized. Attention also was paid to the advantage of energy from biogas over atomic energy.

4

Perspectives of hydrogen production from corn wastes in poland by means of dark fermentation

Sołowski Gaweł, Konkol Izabela, Cenian Adam

Ecological Chemistry and Engineering. S

|

2019

|

Vol. 26, nr 2

255--263

EN

A model for calculating the maximal theoretical production of hydrogen from corn wastes is proposed. The model has been used to estimate the potential for hydrogen production from cereals wastes such as wheat, barley, and corn which are cultivated in Poland. The potentials for Pomorze and other regions of Poland are compared. The hydrogen produced from cereal wastes in Poland could potentially meet 47 % of national hydrogen demand.