AB „Klaipėdos vanduo“ Chief wastewater treatment engineer Kristina Bereišienė Главный технолог обработки сточных вод Кристина Берейшене Municipal hot spots – experience in elimination of “hot spots”- requirements for objects
AB „Klaipėdos vanduo“
Chief wastewater treatment engineer Kristina Bereišienė
Главный технолог обработки сточных вод Кристина Берейшене
Municipal hot spots – experience in elimination of
“hot spots”- requirements for objects
Основные сведенья о компании
AB “Klaipėdos vanduo”
• Established in August 2, 1902
• Authorized capital - 56,06 mln. Eur
• The number of employees – 392
• Number of water service plants – 55
• Number of wastewater treatment plants–
15
• Number of sewage pumping stations–107
• Supply drinking water for 90952
customers
• Основана 2 августа 1902 г.
• Уставной капитал – 56,06 млн. евро
• Число рабочих мест – 392
• Число водозаборов - 55
• Число очистительных сооружений
сточных вод - 15
• Число насосных ст. для стоков – 107
• Число абонентов, которым
предоставляется питьевая вода –
90952.
Water supply system
Система водоснабжения• 55 water service plants
2 in Klaipėda city;
53 - in Klaipėda district;
• 83 deep water boreholes
• 34 - third level pumping stations
• 858.2 km of operating water supply
networks
• Supplied water to networks-11.1 mln. m3
Sold water - 9.6 million m3
• 55 водозаборов
2 Клайпеде;
53- в Клайпедском районе
• 83 глубоководныx скважин
• 34 насосных станций третьего
подъема
• 858,2km сетей водоснабжения в
эксплуатации
• Поставлено воды в сети водоснабже-
ния – 11,1 млн. м3
• Объем проданной воды – 9,6 млн. м3
Wastewater treatment system
Система очистки стоков• 737,1 km of operating wastewater
networks;
• 107 sewage pumping stations;
• 15 wastewater treatment plants:
1 WWTP in Klaipeda;
14 small WWTPs in Klaipeda district.
• In 2017 were treated 17,93 mln. m3
wastewater:
16,92 mln. m3 - in Klaipeda WWTP;
1,00 mln. m3 - in small WWTPs of
Klaipeda district.
• Small wastewater treatment plants
located far from each other. Total
distance between all the small waste
treatment plants is about 300 km.
• 737,1 км сетей для сбора стоков (в
эксплуатации)
• 107 насосных станций сточных вод;
• 15 очистных сооружений:
1 oчистные сооружения г. Клайпеда;
14 маленьких очистных сооружений в
Клайпедском районе.
• В 2017г. было очищено 17,93 млн. м3
сточных вод:
16,92 млн. м3 - в ОС г. Клайпеда;
1,00 млн. м3- в маленьких ОС
Клайпедского района.
• маленькие очистные сооружения
расположенные далеко друг от друга.
Общая дистанция между всеми
маленькими oчистными сооруже-
ниями составляет около 300 км.
Klaipeda WWTP
Очистные сооружения г. Клайпеда
The primary mechanical wastewater treatment;
Biological wastewater treatment;
Sludge digestion;
Sludge dewatering;
Sludge drying;
Energy plant – biogas is used as a source of energy.
The location of small WWTPs in Klaipėda district
Drevernos WWTP (1964)
Veiviržėnų WWTP
Wastewater treatment processes supervision, control and data system (SCADA)
Basic facts about the Klaipeda WWTP 1998 start up into service of biological wastewater treatment
plant;
The designed biological wastewater treatment plant capacity isup to 29,2 million m3 per year (80 000 m3 per day);
In 2008 was installed chemical phosphorus treatment;
In 2009 was built sludge digestion plant (investment 12,16 mln.euro);
In 2013 was built a sludge drying facility (investment 6,66 mln.euro);
2016 started landfilling biogas utilistion. In average 100 000m3/month.
Wastewater treatment effect up to 98%;
Wastewater treatment plant employs 19 people staff.
Primary mechanical wastewater treatment
Первичная механическая очистка сточных вод
• Sewage inlet chamber Qavg=45000m3/day
(Project Q = 80000 m3/day)
• Automatic perforated HUBER EscaMax®
screens - 3 pcs.
• HUBER ROTAMAT® Screenings Wash
Press WAP/SL
• HUBER sand washer RoSF 4
• Sand grit - 2 sections
• The primary settling tank -3pcs. (Ø 48 m).
• Gravity sludge thickeners - 3pcs.
• The amount of screenings transporting to the
landfill - 18t/month.
• The amount of sand transporting to the
landfill - 12t/month.
Biological wastewater treatment
Биологическая очистка сточных вод• UCT (Кейптаунский университет)
технологическая схема;
• Аэротенки разделены на 4 независимые
секции;
• Концентрация активного ила 4-4,5 мг/л;
• Концентрация растворенного кислорода
1,8-2,5 мг O2/л;
• Для улучшения очистки общего азота
используется органическая добавка
POLIFLOCK MT 12 ECO;
• Очищенные сточные воды поступают в
спускной канал и впадает в Куршский
залив;
• Очищенная сточная вода используется в
качестве технической воды в процессе
сушки ила;
• Химическая очистка фосфора из-за
хороших общих показателей очистки
фосфора не используется.
• UCT (Cape Town University)
technological scheme;
• Aerotanks divided into 4 independent
sections;
• Active sludge concentration 4-4.5 mg/l;
• Dissolved Oxygen Concentration 1.8-2.5
mg O2/l;
• For better cleaning of total nitrogen is
used the organic additive POLIFLOCK
MT 12 ECO;
• The treated wastewater enters to the
channel and enters to the Curonian
Lagoon;
• Treated waste waters also are used as a
technical water in sludge drying process.
• Chemical cleaning of phosphorus due to
the good general phosphorus cleaning
parameters is not used.
Wastewater treatment requirements and
operation results in 2017
Требования очищенным сточным водам
Parameter
Before
treatment,
mg/l
After
treatment,
mg/l
Effluentpermitlimit
values, mg/l
Designedeffluent,
mg/l
Suspended matter (SM) 399,76 6,59 - 15,0
Biochemical Oxygen Demand
(BOD7)388,20 6,22 15,0 20,0
Total nitrogen (N) 88,35 9,95 10,0 15,0
Total phosphorus (P) 10,30 0,426 1,0 1,5
Small WWTP in
Klaipeda district
ParameterBefore
treatment,
mg/l
After
treatment,
mg/l
Effluent permit limit values, mg/l
MAC mom., mg/l Maximum annual average
concentration, mg/l
1(b) Vėžaičių NV
Biochemical Oxygen Demand (BOD7)249,914 3,714 12 12
Total phosphorus (P) 8,78 1,741 2
Total nitrogen (N) 82,973 13,292 36
2(b) Lapių NV Biochemical Oxygen Demand (BOD7)137,951 9,048 34 23
3(b) Veiviržėnų NV Biochemical Oxygen Demand (BOD7)82,171 6,889 34 23
4(b) Judrėnų NV Biochemical Oxygen Demand (BOD7) 206,35 12,373 34 23
5(b) Drevernos NV Biochemical Oxygen Demand (BOD7)86,7 10,243 34 23
6(b) Kalnuvėnų NV Biochemical Oxygen Demand (BOD7)169,492 15,25 34 23
7(b) Endriejavo NV Biochemical Oxygen Demand (BOD7)352,631 4,677 34 23
8(b) Žadeikių NV Biochemical Oxygen Demand (BOD7)24,333 7,757 34 23
9(b) Kretingalės NVBiochemical Oxygen Demand (BOD7)
378,007 20,669 34 23
Fats 0,179 20 10
10(b) Plikių NVBiochemical Oxygen Demand (BOD7)
80,084 5,37 17 12
Total phosphorus (P) 2,047 2,09
11(b) Girkalių NV
Biochemical Oxygen Demand (BOD7)318,429 16,717 17 12
Total phosphorus (P) 2,235 2
Total nitrogen (N) 17,813 20
12(b) Kvietinių NV Biochemical Oxygen Demand (BOD7)219,948 6,539 34 23
13(b) Dauparų NV Biochemical Oxygen Demand (BOD7)354,959 8,426 34 23
14(b) Šiūparių NV Biochemical Oxygen Demand (BOD7)388,013 11,715 34 23
Requirements for treated wastewater
Требования очищенным сточным водам
The amount of treated wastewater (in million m3 /y) for 1995-2015
Количество очищенных сточных вод (в млн. м3/год) за 1995-2015
0
5
10
15
20
25
30
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
mln. m3
Biochemical Oxygen Demand (BOD7) concentrations in 1995-2017
Концентрация биохимического кислорода (BOD7) в 1995-2017г.
0
50
100
150
200
250
300
350
400
450
500
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
Co
nc
en
tra
tio
n m
g/l
before treatment after treatment
The concentration of total nitrogen in 1995 - 2017
Концентрация общего азота в 1995-2017г.
0
10
20
30
40
50
60
70
80
90
100
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
Co
nc
en
tra
tio
n m
g/l
before treatment after treatment
Total phosphorus concentrations in 1995 - 2017
Общие концентрации фосфора в 1995 - 2017 г.
0
2
4
6
8
10
12
14
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
Co
nc
en
tra
tio
n m
g/l
before treatment after treatment
Sludge management and energy plant
Energy plantThe produced biogas is using for energy in the central combined heat
and power plant. The power plant is equipped with 3 biogas generators (eachgenerator electric power 311 kWel). A biogas powered engine energyconverting into electricity and thermal energy. Electrical energy is used forown needs. Currently generators producing for almost 70% of the wastewatertreatment plant required electric power. Thermal energy is used for digestersand biological biogas cleaning. Sludge drying using spare heat from this 3generator, and from installed an additional 600 kWel power generator, whichis using landfill or natural gas.
Total produced amount of biogas 2016 m. - 2,216 mln. m3/metus(6071,6m3/d)
The total produced amount of electricity 2016 m. –4460,136MWh/metus (12219,55 kWh/d)
Total produced amount of heat (designed) –6456 MWh/a
Sludge drying plantIn 2013 was built a sludge drying plant, which is available to dry
up to 18,000 t/a of dewatered sludge. This low-temperature belt
dryer (manufacturer Sülzle Klein GmbH) with a capacity of 4,800
t/a of dried sludge (90 % SM).
The dewatered sludge from centrifuges (also sludge from other
treatment plants) comes to 400 m3 volume bunker. From bunker
sludge are pumping to distributors. The distributor evenly spreading
sludge on top of the dryer belt. In the dryer sludge is transporting
through a drying zone at 80-90°C where the heated air removes
moisture;
Dried sludge are crushing and transporting in to the silo (150m3),
where are storing until unloading;
During drying process, outgoing air is cleaning in scrubber,
afterward in biofilter and discharging into the environment.
Sludge drying plant
The sludge volume reduction
Liquid sludge 1000 kg; 4% SM
Mechanically dewatered sludge 44 kg; 25% SM
Dried sludge 44 kg; >90% SM