Technology for waste-resource reuse

· One of the various experiments for alternative external carbon source is the microbial biodegradability analysis on the waste-resource.
· The biodegradability analysis is carried out with our respiration meter which can analyze the portion of biodegradable COD.
· Based on these analysis we can decide if a certain sample can be used as an external carbon source.



COD composition

RBDCOD

NBDCOC

mg/L

%

mg/L

%

528,861

99.8

1,139

0.21


Respiration rate
(mg O2/g VSS/hr)

Sum of oxygen uptake rate
(mg O2/L)

Yield
(gCOD/g COD)

Initial End.

Final End.

Max.

5.13

23.61

58.57

284.61

0.43


· Another experiment is to evaluate the denitrification capacity when we try to use the waste-resource as a substrate for the microorganisms.
· This experiment is carried out as a batch mode. The denitrification capacity of alternative external carbon source is compared with those of commercial external carbon sources such as methanol, ethanol, and acetic acid.


Carbon Source

SDNR
(mgN/gVSS/hr)

CODcr/NO3`-N

Low alcoholic liquid

10.86

2.51

Methanol

11.10

2.40