CONTENTS
Editor's comment
I.
Simeonov
3-4
I.
MAN AND BIOSPHERE
N. Stankova,
Environmental monitoring on wetlands
restoration in the area of quarry lakes
K. Radeva
15-22
II. MICRORGANISMS AND
ENVIRONMENT
L.
Dimitrova, V. Kussovski, I. Tsvetkova, S. Mihaylova, N.
Ivanov, G. Gluhchev, H. Najdenski
23-32
III.
TECHNOLOGIES FOR DEPOLUTION
Biodegradation of
1,2-dibromoethane by Klebsiella
Oxytoca VA 8391 strain
E.
Vasileva, V. Beschkov, Ts. Parvanova-Mancheva
33-37
Stabilization methods sewage
sludge from wastewater plant treatment
station and use in practice
E.
Zlatareva, S. Marinova, M. Banov, V. Georgieva
38-45
Assessment of the deep
wastewater discharge
from point emitter into Burgas bay
A.
Simeonova, T. Zhekova, N. Nikov
46-55
IV.
FOREST BIOLOGY
Distribution,
structure and regeneration of
B.
Hristova, N. Stoyanova
56-63
V. MODELLING OF
ECOSYSTEMS
Simulation model of the
hydrodynamic parameters northwest Bourgas bay
T. Zhekova
64-72
VI. RENEWABLE ENERGY AND
BIOFUELS
Study of the influence of
ultrasound on the anaerobic digestion of wasted fruits
and vegetables
I.Simeonov,
D. Denchev, V. Hubenov,
VII. SCIENTIFIC FORUMS
World forest forum
A.
Alexandrov
81
Ninth Balkan congress of microbiology
D.. Denchev
82
National
conference with international participation “Ecology and health” 2016,
Environmental
effects and consequences of floods in the region of
Maritsa river during the period 2005 – 2014 by using
satellite, GPS and terrestrial data
Nataliya Stankova, Iva Ivanova,
Nadya Pavlova, Roumen Nedkov, Mariana Zaharinova
Abstract. The aim of
this study is monitoring of environmental impacts after
the flood from 2005 in the region of
Keywords: flood,
consequences, satellite data, remote sensing, GIS
ENVIRONMENTAL MONITORING ON WETLANDS RESTORATION IN THE AREA OF QUARRY LAKES
Kameliya Radeva
Abstract. The main purpose of the
report is to represent basic stages of activities during
implementation of projects related to wetland restoration.
The report describes the basic steps and methods for data
collection, survey of the study area – wetland type, data
generating, internal monitoring implementation and
effectiveness of restoration activities evaluation. The
specific objective of the report is to analyze the
importance of GIS applications in the process of
environmental monitoring for sustainable restoration of
wetland habitats.
The main
activities are grouped as follows: feasibility studies,
restoration activities design, restoration activities
implementation (technical and biological restoration of
habitats and species), reintroduction
of rare flora and fauna types of European importance. Decision making on applying of suitable measures
referring to activities under technical and biological
habitats and species restoration will be underlined. The
issue on correlations between implemented preliminary
studies, suitable design solutions based on real results and
restoration/construction works in environmental projects
management has been investigated. Afforestation activities and fishing campaigns will be
revised as part of biological restoration of habitats and
species.The information of this report has innovative
character as it presents methods of environmental monitoring
on wetland restoration projects. The results that
demonstrate the effectiveness of applying environmental
monitoring and validate the successful implementation of a
certain wetland recovery process are presented in the report.
Key words: wetlands, biological restoration, satellite data, GPS, habitats, environmental monitoring
BACTERICIDAL
EFFECT
OF ELECTROCHEMICALLY ACTIVATED WATER ON THE AEROBIC
BACTERIAL POPULATION OF DIGESTATE
Lyudmila
Dimitrova, Vesselin Kussovski, Iva Tsvetkova, Snejanka
Mihaylova, Nikolay Ivanov, Georgi Gluhchev, Hristo Najdenski
Abstract.
In the
recent years, electrochemically activated water (ECAW) is
considered as an alternative disinfectant used for the
decontamination of objects of clinical practice and the
environment. Low percentage of aqueous solution of sodium
chloride and an electrolytic cell was used for its
preparation. The main advantages
of ECAW than traditional disinfectants are its high
microbicidity, easier and cheaper preparation, and the
safety for the treated objects. Despite its high acidity, it
is gentle to the surface of inorganic or organic nature. The possibility for decontamination of
digestate obtained in the process of biogas production is
examined in the recent paper. The optimal conditions for the
impact of ECAW on the available in the digestate aerobic
bacteria leading to their killing like the duration of
treatment, the ratio of digestate and activated water, and
the influence of substances of digestate on the bactericidal
effect of ECAW are determined. There
is a reduction of the number of Gram-negative bacteria with
log 4 after two-hour treatment at a ratio of 1:3
digestate:activated water, as well as complete elimination
of the microbial population (Gram-positive and Gram-negative
aerobic bacteria) under the same conditions after a
pre-diluting the digestate in ratio 1: 100 and 1: 1000. ECAW
completely eliminates methicillin resistant Staphylococcus
aureus (MRSA) and Escherichia coli in
experiments in vitro with sterile filtrate of the digestate.
The results indicate the prospects of the ECAW application
for treatment of digestate and its possible use as a
fertilizer in agriculture.
Keywords:
digestate, electrochemically activated water (ECAW), aerobic
bacteria, bactericidal effect
BIODEGRADATION
OF 1,2-DIBROMOETHANE BY KLEBSIELLA OXYTOCA VA 8391 STRAIN
Evgenia Vasileva, Venko Beschkov, Tsvetomila
Parvanova-Mancheva
Abstract.
1,2-Dibromoethane is widely used in practice as pesticide and
anti-knocking mains for engines. However, it is very toxic and
therefore too dangerous for the environment. Its
biodegradation passes through very toxic intermediates (e.g.
bromo-acetaldehyde) and that is why the complete
biodegradation is not observed. In the present study
comparative biodegradation was carried out by the strain Klebsiella oxytoca
VA 8391 with and without presence of NaCl. In both cases cell
growth was observed initially followed by quick death of the
biomass at the end of processes. In the presence of NaCl,
complete degradation of 1,2-dibromoethane was attained along
with the release of stoichiometric quantity of bromide. This
fact is an evidence for the full degradation of the substrate
to glycolic acid and mineralization. In the absence of NaCl
the biodegradation of 1,2-dibromoethane stops when only one
bromide ion is detached, i.e. the biodegradation stopped only
to the formation of bromoacetaldehyde and bromo-acetic acid at
the process end.
Key words:
1,2-Dibromoethane, Klebsiella
oxytoca VA 8391,
bromoacetaldehyde, bromide ions
Stabilization
methods
sewage sludge FROM Wastewater
plant treatment station
and USE in
practice
Elena Zlatareva, Svetla Marinova, Martin Banov, Veselka Georgieva
Abstract: The
large amount of sludge generated in Wastewater plant treatment
station (WWTP) and
lack of slug fields for their stabilization have
conducted this study. It is used sludge from WWTP Stara Zagora
treated with 15, 20 and 30% fine and coarse lime /CaO/. The sludges were analyzed
before and after treatment with lime in agrochemical,
chemical and microbiological parameters and content of organic pollutants as required
by the law. It was found
that the most effective treatment was with 20% fine lime of
the dry substance of the sludge. Treatment of sludge with lime does not have a
negative effect on their chemical and agrochemical
characteristics.
Keywords: sewage sludge, decontamination, lime
ASSESSMENT OF THE DEEP WASTEWATER DISCHARGE
FROM POINT
EMITTER INTO BURGAS BAY
Anna Simeonova,
Tatyana Zhekova,
Nikolai
Nikov
Abstract:
In the present study was investigated the
reduction of pollutants’ concentrations in the wastewater of
“Elenite” Waste Water Treatment Plant (WWTP) for 2013 year
after deep water discharge in Burgas Bay, based on
mathematical approach. For that
purpose data of the wastewaters’ quantities and physico -
chemical characteristics for 2013 were used, as well as
some hydro - chemical characteristics of the
Key words:
wastewater, point emitter, deep discharge,
Biljana Hristova,
Nadezhda Stoyanova
Abstract: The
allocation, structure and regeneration of the most distributed
coniferous species Picea
abies (L.) Karsten in Nortwestern part of Vitosha
Mountain were studyed. It is described the
distribution of spruce forests according to altitude, age
structure, conopy and other characteristics. On the basis of
the data collected, follows that in investigated
region Norway spruse (Picea
abies (L.) Karst.) is formed clean
on composition and mix dendrocoenoses with different
participation in theirs composition of Fagus sylvatica L.,
Abies alba Mill., Pinus sylvestris
L.and some other spesies. The distribution and regeneration of
the forests are conditioned mainly by natural conditions,
biological peculiarities and ecological demands of the tree
species. The article introduce some importantly research
aspects about the ecology, site conditions and regeneration of
Norway spruse forests in Vitosha Mountain.
Key words: Norway spruse,
ecology, climate, state, regeneration
Tatiana Zhekova
Abstract: Marine and
ocean beaches are exposed to the complex action of the
lithosphere, atmosphere and hydrosphere. One of the major
environmental factors that determine sustainable development
of coastal zones is the hydrodynamics. The main hydrodynamic
parameters that influence the beaches and coastal facilities
are currents. The article dealt with the methods and means
to develop a simulation model of the hydrodynamic parameters
in the Northwestern part of the
Kay words: simulation
model, hydrodynamic parameters, currents, wind, Geography
Informational System
I.Simeonov, D. Denchev, V. Hubenov, S.
Mihajlova,
Abstract. In biological experiments, treatment with
ultrasound (
The aim of this paper was to study the effect
of treatment of the culture, containing the biological agent
- microbial community and a mixture of wasted fruits and
vegetables (WFV) as a substrate with US with power up to 120
W and frequency of 28 kHz.
The experiments were conducted in two identical
laboratory bioreactors with working volumes of 2 liters
working volume in a continuous mode. The bottom flange of
the first bioreactor was bonded to ultrasound emitter. The temperature was kept constant (34 ± 0.5
ºC). Samples were taken from the outgoing substance for
conducting biochemical and microbiological analyses in
compliance with all requirements for anaerobic conditions. Daily measurements were performed of the yield
of biogas. The effect of
US on the yield of biogas and the degree of biodegradation
were examined in two different versions: In the first one – the influence of power and
time of the sound effect on the formation of biogas from
acetate was followed, and in the second – sound with optimum
amplitude of the US (determined in the first case) to study
its effects on all the populations involved in the AD of
WFV, at criterion maximizing the biogas yields.
Key words: ultrasound,
anaerobic digestion, laboratory experiments, biogas
production