VOL. 11 issue 3 (2009)
Full
text of each
article is
available in PDF format. CD with full texts could be ordered on our web
site.
All articles have been reviewed by the members of Scientific Board.
Directions of waste plastics recovery in
countries of European Union
Wasielewsk R., Piechaczek M.
(in Polish)
Abstract
The paper shows a study of main issues with polymer wastes recycling.
Streams of polymer wastes created in the European Union with directions
of their recovery were characterized. Article presents potential
possibilities of using various recycling technologies for both mixed
and sorted polymer wastes and describes development trends. Currently
it is possible to utilize more than a half of waste polymer materials
in various conventional technologies.
An analysis of the current status of
the production and utilization of biodiesel fuel in Poland and the
prospects for its development
Kwiatkowski M.
(in Polish)
Abstract
In the recent years, due to the gradual depletion of the resources of
crude oil and the propagation of the greenhouse effect, a range of
activities have been undertaken towards broader use of liquid biofuels,
and in particular biodiesel fuel produced on the basis of vegetable
oils. Unfortunately, the process has provoked a number of
controversies, concerning mainly the effect of biodiesel oil on the
durability and performance of car engines. A series of contradictory
assessments have been publicized with regard to the capacity to extend
the acreage of oil plants and their impact on the natural environment,
in particularly the risk of competition between the cultivation of fuel
plants and the farming of plants for food purposes, as well as to the
problem of felling tropical forests for the cultivation of oil palms.
The article offers a critical revision of the current condition of the
production and usage of biodiesel fuel in Poland on the background
other countries and the prospects for its development, with the
particular emphasis on analyzing the possibilities to increase the
production of rape. Attention has been drawn to the difficulties in
expanding the production of rape by way of both extending the
cultivated acreage and increasing the volume of crop. It has been
emphasized that only a small number of Polish farms are able to engage
in growing rape due to the specificity of the cultivation works and the
requirement to ensure their profitability. Having regard to the above,
Poland has little capacity of increasing the volume of produced rape;
as a consequence, it is impossible to produce the sufficient volume of
the material for the purposes of the manufacture of edible oils and
fats and the development of the production of biodiesel fuel. Due to
the prospected deficit in biodiesel oil and the lack of reasonable
possibilities for a considerable increase in its production, the fuel
should be used mainly on such areas as landscape parks, holiday resorts
and spas, or in the centres of big cities.
Carbon
cycle in Municipal Solid Waste managements
Pikoń K., Rejman R.
(in Polish)
Abstract
In the manuscript following issues are presented:
• carbon cycle in bio-thermal processes
• carbon cycle in thermal processes
• carbon cycle in landfilling
The carbon cycle is very important for evalauation of enviromnetal
iumnpact in cglobal warming category. The environmental impact of
different waste managfement options on climat change could be describes
on the basis of carbon cycle.
Possibility
of economic utilization of floatation tailings
Alwaeli M., Czech Ł.
(in Polish)
Abstract
Mining waste management creating enormous problems. Floatation tailings
are one of the biggest group of coal exploitation waste . These waste
characterized by very fine granulation (below 1 mm). This paper
describes characteristics, regulations, and possibilities of floatation
tailings in Poland. A part of wastes is delivered to processing plants
where the coal contained in the wastes is recycled, another part is
used in underground technologies and for both industrial and
non-industrial purposes on the surface.
Technology
of ice water production in tri-generation systems – a current state
review
Schroeder A., Łach J., Poskrobko S.
(in Polish)
Abstract
This paper presents a review of some hitherto existing engineering
solutions of ice water production in both centralized and decentralized
systems of tri-generation. In the first place, the attention has been
paid on reasons for which associated cold production for air-condition
purposes can be treated as the manner of the solution of many very
important problems. The following considerations are devoted to
presentation of both advantages and disadvantages of individual
tri-generation systems. The basic part of the work is intended to
describe choosen technological solutions.
Stoker
fired boiler WR-25 modernization for ecological mixtures combustion
process - I
Wi¶niewski M.,
(in Polish)
Abstract
The issue of this thesis is to analyze the technical solutions
resulting in higher susceptibility of stoker fired boiler WR-25
to use renewable fuel and ecological mixtures in combustion process.
These solutions cover various modifications of supplying the stoker
with fuel, preparing fuel mixtures as well as extending the economical
capacity of the boiler through enhanced heat exchange surface and
improved exhaust fumes dedusting.
Stoker
fired boiler WR-25 modernization for ecological mixtures combustion
process - II
Wi¶niewski M.,
(in Polish)
Abstract
The issue of this thesis is to present specific technical solutions
involved in a complex modernization of WR-25 stoker fired boiler plant.
Among these proposals we can find fuel mixing station that allows to
prepare the fuel composed of coal and waste timber as well as a special
dedusting system that complies with future strict exhaust fumes
emission standards.
Application
of by-products from soda Solvay process for phosphate ions removal
Ziółkowska D., Shyichuk O., Libner K., Welerowicz Z.
(in Polish)
Abstract
Applicability of soda industry by-products for remediation of phosphate
ions from wastewaters has been studied. The calcined limestone has been
found to ensure elimination of PO43- ions from water solutions with the
efficiency of 99%. The calcined limestone dosage necessary for certain
reduction of PO43- ions is increased following the increase in initial
concentration of phosphate ions. Meantime the necessary excess of
calcined limestone is decreased. Another examined by-product, lime,
also ensures efficient phosphates elimination (higher than 97%).
Meantime the needed lime dosage is much greater then that of calcined
limestone. Application of both the examined materials has been found to
result in marked increase of solution pH. Neutralization of the
post-reaction suspension occurs spontaneously within a week due to
atmospheric carbon dioxide absorption.