Application of Levapor Carriers for municipal wastewater treatment at NINGAN, China Wastewater treatment plant. Despite very hard winter, nitrification was established within three weeks times which remained stable over a wide range of load fluctuations.

1. LEVAPOR GmbH
Biofilm Technologies
www.levapor.com
NINGAN SEWAGE TREATMENT PLANT
LEVAPOR SUPPORTED FLUIDIZED BED TECHNOLOGY
Entrance of the NINGAN Sewage Treatment Plant
NINGAN is a city with 440.000 inhabitants located ca. 20 km southwest of
Mudanjiang in the Heilongjiang province. Due to the cold climate in the area and our
positive experiences in the biotreatment of municipal sewage in LEVAPOR
supported fluidized bed reactors in Finland, it has been decided to use this
technology also in one new municipal plant of Ningan, designed for a capacity of
22.000 m³/day wastewater.
Based on our experiences the plant was designed with only 3.200 m³ aerated volume,
filled with 480 m³ (15 vol.%) of LEVAPOR carrier cubes of 20x20x7 mm. The plant,
constructed by Harbin Baishenglubin Environmental Technology Co.Ltd was started
in October 2010 (already winter in Ningan) and reached quite fast its full COD removal
capacity, while the start and establishment of nitrification required more time, because
the development of slowly growing nitrifying bacteria requires in a new plant a longer
period.

2. Filling the reactor
Fluidised LEVAPOR carrier
Plant performance
The results achieved in the period of October – December 2012 are presented in table
1 and diagrams 1 and 2 .
Legend
Volume of reactors
Volume LEVAPOR
Hydraulic ret. time
COD
in
out
BOD5
out
TKN
in
NH4N
out
TN (NO)x
out
Susp.solids
in
out
Water temperature
Dimension
m³
m³
h
2012
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
°C
Value
3200 (4 x 800)
480 (15 %)
3,5 – 3,8
October November
294
295
33,7
35,8
11,9
12,9
28,8
35,3
2,0
3,2
12,5
14,8
240
202
12,3
11,0
15,6
13,3
December
302
37,7
12,9
23,2
3,34
11,0
247
13,6
9,6
Table 1. Technical data and performance of the WWTP in Oct.- Dec. 2012

3. Fig. 1
Fig. 2
COD – removal in the period of Oct. – Dec. 2012
Nitrogene removal at decreasing water temperatures in Oct.- Dec. 2012

4. Summary
1.Despite decreasing temperatures and remarkably shorter hydraulic retention times in
the bioreactors of 3.5 to 3.8 hrs (instead of usual 6 to 10 hours), the plant showed very
good results, achieving outlet COD-values of 33 to 38 mg/L (88– 89%) and oulet-NH4Nvalues of 2,0 to 3,3, mg/L (91- 93 %),meeting all legal requirements.
2.Despite remarkable fluctuation of the inlet-COD and –TKN concentrations,
performance of both processes remained stable, a remarkable dependence of
declining temperatures, typical for nitrification has not yet been registered,
confirming earlier experiences.
3.The relatively high removal of TKN confirms also that a remarkable amount of
generated nitrate (NO3 ) became denitrified within the porous carrier body,
with locally lower oxygen concentrations.
4. The results confirmed all advantages of biofilm technology and show that application of this technology enables efficient and stable problem solutions at remarkably lower capital and operation costs.
Presented informations are based on experiences with application LEVAPOR carrier. Testimonies on expected effects can be
made in individual case only on basis of investigations of given emissions and in some cases on basis of practice relevant
experiments.
LEVAPOR GmbH
Kölner Str. 38
D- 51379-Leverkusen
Germany
www.levapor.com
Tel.: ++ 49-2173-938715
Mobile: ++ 49-177-786 5533
E-mail: levapor@web.de