Customer Problem
The wastewater treatment plant in Turek has a designed daily capacity of approximately 15,750 cubic meters/day. Daily influence reaches from 8,500 - 10,500 cubic meter / day.
As is common in many wastewater treatment facilities, the customer faced numerous challenges
with the operational efficiency of the system including wastewater quality, foul odors negatively
affecting the surrounding communities, difficulties with sludge removal, difficult working
conditions for staff, and clogged drains due to sludge.
Goal
All outflow standards established by regulations must be met; further reduction of baseline outflow results are desired (see Table 1 and Table II respectively).
Table 1: Environmental Regulation Standards
Parameter |
Unit |
Outflow Standard |
Chemical Oxygen Demand (COD) |
mg/dm3 |
≤ 125 |
Biological Oxygen Demand (BOD) |
mg/dm3 |
≤ 15 |
Total Suspended Solid (TSS) |
mg/dm3 |
≤ 35 |
Nitrogen (N) |
mg/dm3 |
≤ 15 |
Phosperous (P) |
mg/dm3 |
≤ 2 |
Table II: Mean Wastewater Characteristics (2004) Prior to SCD Probiotics Applications
Daily inflow
[m3/day] |
Production [t/year] |
Inflow [mg/dm3] |
Screenings |
Sand |
Sludge |
TSS |
COD |
BOD |
P |
N |
8435 |
158.1 |
107.8 |
711.0 |
237.2 |
802.6 |
534.5 |
13.5 |
60.1 |
Outflow [mg/dm3] |
TSS |
COD |
BOD |
P |
N |
16.4 |
58.4 |
8.1 |
1.1 |
11.3 |
Methodology
SCD Bio Klean is added to the sludge once it is separated from the water inflow. A portion of sludge is re-circulated to the system at the beginning of the process.
Results
Significant improvement in all outflow parameters occurred (40 - 65% reduction in outflow parameters compared to mean baseline parameters).
Table III: Mean Wastewater Characteristics (2008) After SCD Probiotics Application
Daily influence
[m3/day] |
Production [m3/day] |
Influence [mg/dm3] |
Screenings |
Sand |
Sludge |
TSS |
COD |
BOD |
P |
N |
8222.0 |
11.7* |
105.0 |
741.1 |
318.6 |
970 |
458 |
13.3 |
64.6 |
Effluence [mg/dm3]
|
TSS |
COD |
BOD |
P |
N |
5.0 |
35.8 |
2.7 |
0.5 |
5.6 |
Results (continued)
In addition, the following benefits were achieved as a result of the SCD Probiotics application, positively impacting the operational and financial performance of the wastewater treatment facility.
- The structure of the sludge changed from greasy to porous. Consequently, transportation of the sludge became easier.
- The pathogenic microbes were conceivably decreased which accounted for the removal of foul odor and improved sanitary working conditions.
- The amount of utilized coagulation agents was reduced by 35 - 40%.
- The lime previously applied to the sludge was entirely removed from the hygienisation process.
- The pontoons formerly used to cover the open digestion chambers are no longer in use.
- he clogging of the drainage system of sludge deposit sites was eliminated.
- The interest in applying sludge for farming needs and soil restoration significantly increased.
Cost Analysis: SCD Probiotics retail price of $7.57/gallon was used for the following information. This facility has an average daily inflow of 9500m3 or 2,513,175 gallons of waste water to be treated. The daily treatment dosage prescribed is 1:165000 with 15 gallons of SCD Bio Klean™ applied as the treatment. This is an investment of $115/day to maintain the microbial ecology of the waste water treatment system with beneficial microorganisms or Probiotics. This application breaks down to a cost of $0.00005/gallon of waste water to be treated.
