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TECHNICAL COLLEGE BUZAU,
ROMANIA
COMENIUS MULTILATERAL
PARTNERSHIP
LIFE-GIVING WATER
Optional course: “Research for
interdisciplinary approach of
the aquatic ecosystems“
Ninth graders
Presentation of optional course content
 1. Identifying simple problems - Characterize and recognize aquatic
ecosystems
1.1.The classification of aquatic ecosystems characteristic for Romania
1.2.The rivers ecosystems
1.3. The lakes ecosystems
 1.4. The ponds and marshes ecosystems
1.5.The Black Sea ecosystem
1.6. Artificial aquatic ecosystem - aquarium
2. Forming and implementing a plan to solve – Observation and
measurements of the characteristics of aquatic ecosystems biotopes
2.1. Setting abiotic factors of rivers and lakes
2.2. The characterization of biocenosis rivers and lakes
2.3. Making an aquarium
3. Checking the results - Achieving the observation and measurements
on an ecosystem biotopes proposed for research
3.1. Interdisciplinary research of a local aquatic ecosystem
3.2. Determining the impact human-nature
3.3. Establishing rules for eco-responsible behavior towards
water resources
Characterization of the ecosystem
- Buzau River
 Buzău River - important
tributary stream of the
Siret River, is located in
the south-east of the
Carpathians, the
Carpathian area and an
area in northeastern
Romanian Plain.
Total area - 5264 km2
Organizing of the seminar on the subject of "Water
quality monitoring Buzau River" presented by Ms. Sena
Şoaită , biologist from Buzau Basin Administration
Observation and measurements
 3 water samples were
taken from Buzau river ,
respectively from the
following areas:
Paltineni- the mountains
Magura - the hill
Vadu Pasii - the plain,
 Qualitative observation
were made on water
color and turbidity by
comparing the color of
analyzed water with the
color of distilled water
Water color and turbidity – Buzau
water is colorless and clear
Determination of water pH indicator paper
Merck and pH meter = 6.5-7
Determination of conductivity
PALTINENI
MAGURA
VADU PASII
Determination of iron and nitrate with
colorimetric method - iron and nitrate = 0
Determination of hardness
PALTINENI –
DT = 162 mg/l CaCO3
Determination of sulfite
Determination of sulfite
PALTINENI – 5 mg/l Na2SO3
Determination of alkalinity
PALTINENI –
total alkalinity = 132 mg/l CaCO3
The Helesteu Lake in Crang Park
 The Crang Park is the largest and most important park in Buzau.
It is located on the western edge of the city and occupies an area
of about 10 hectares. This area is part of a 189 ha of forest, the
forest Crâng with mainly broad-leaved trees, with few conifers. It
is known primarily for secular oaks.
In the park were also planted some specimens of trees from other
regions.
The Helesteu Lake was arranged to set the park for boating.
Water is brought from Buzau River. The lake is the seat of
aquatic plants or green algae, including a plant popularly known
as “little fir tree”. We have taken samples of the water and we
determined the pH and water temperature.
Identification of algae
Bradulet (little fir tree)
Organised visits to specific companies
 There were organized visits to the Buzau Water
Company, to Water Supply Stations, Crang and
Dragaica;
Visit to the water company, Buzau - WWTP and the
wastewater analysis laboratory;
Visit to Water Company SA Buzau
 Ninth grade students and
XIIth graders from
natural resources and
environmental protection
profile, visited The Water
Company, the drinking
water distribution station
Buzau, at Dragaica
Drinking water distribution
station Dragaica
Water flow control by computer
Drinking water distribution pumps
Chlorine dosage point, required in order to make water
drinkable by disinfection
Chlorine dosing control
Visit to Water Company SA Buzau - Crang
station
 Ninth graders visit the water castles in CRANG
The Underground Catch basins
Trap Visiting and Control of Underground basin
POINT OF CONTROL BASED ON SOFT CONTROL AND MONITORING
THE CRANG WATER SOURCE
Working station for dosing of chlorine in
the water
Automatic dosing chlorine station
Chlorine tanks - Determination of
residual chlorine
It is made with
ortotolidina solution and
comparing the color
obtained with a standard
scale
WATER COMPANY WWTP Buzau
Water purging
 Purging – is a complex process of
retention and neutralization of
pollutants, dissolved or colloidal
matter, present in industrial
wastewater or household purposes spill
into the environment without affecting
the flora or fauna, in our case Buzau
River water.
Wastewater is treated in wastewater
treatment plants by means of physical chemical neutralization retention and
sedimentation, neutralization,
precipitation, coagulation, flocculation,
absorption on activated carbon, ion
exchange and biological means using
microorganisms.
Laboratory
Water purification was monitored by
measurements before and after entering
the treatment plant. In laboratories
station to determine:
- Nitrogen met as free ammonia,
organic nitrogen, nitrates and nitrites;
- Microorganisms that require
disinfecting water leaving the treatment
plant.
Determination of nitrogen
compounds in water
Thank you for your attention
 Students of Ninth graders IX E and IX F, coordinated
by teachers Daniela Moise , Marieta Emilian and
Magdalena Coman