Nebraska Administrative Code
Topic - ENVIRONMENT AND ENERGY
Title 197 - RULES AND REGULATIONS FOR THE CERTIFICATION OF WASTEWATER TREATMENT OPERATORS
Appendix B - Industrial Wastewater Treatment Plant Point Rating System
A wastewater system with only collection, lift stations, and chlorination is considered a collection system and not a wastewater treatment plant. Each unit process will have points assigned only once.
|
Item |
Points |
Your Plant |
|
Size (1 point minimum to 10 point maximum) |
||
|
Design flow average day or peak month's flow average day, whichever is larger (1 point minimum to 10 point maximum) |
1 pt/MGD or part |
|
|
Preliminary Treatment |
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|
Grease removal |
3 |
|
|
Plant pumping of main flow |
3 |
|
|
Screening, comminution, microscreens |
3 |
|
|
Grit removal |
3 |
|
|
Equalization |
1 |
|
|
Sedimentation/clarification |
5 |
|
|
Primary Treatment |
||
|
Dissolved air flotation |
3 |
|
|
Coagulation/flocculation |
5 |
|
|
Secondary Treatment |
||
|
Bio-filtration with secondary clarifiers |
10 |
|
|
Activated sludge w/o secondary clarifiers (including extended aeration, oxidation ditches) |
15 |
|
|
Stabilization ponds without aeration |
5 |
|
|
Stabilization ponds with aeration |
8 |
|
|
Tertiary Treatment |
||
|
Ion exchange for advanced waste treatment |
10 |
|
|
Reverse osmosis, electrodialysis and other membrane filtration techniques |
15 |
|
|
Chemical recovery, carbon regeneration |
4 |
|
|
Polishing ponds for advanced waste treatment |
2 |
|
|
Chemical/physical advanced waste treatment w/o secondary |
15 |
|
|
Chemical/physical advanced waste treatment following secondary |
10 |
|
|
Biological or chemical/biological advanced waste treatment |
12 |
|
|
Additional Treatment Processes |
||
|
pH adjustment |
1 |
|
|
Oil separation |
3 |
|
|
Chemical pretreatment (except chlorination, enzymes) |
4 |
|
|
Filtration |
6 |
|
|
Air stripping |
5 |
|
|
Solids Handling |
||
|
Solids conditioning |
2 |
|
|
Solids thickening |
5 |
|
|
Anaerobic digestion of solids |
10 |
|
|
Aerobic digestion of solids |
6 |
|
|
Evaporative sludge drying |
2 |
|
|
Irrigation of solids |
5 |
|
|
Mechanical dewatering |
8 |
|
|
Solids reduction (including incineration, wet oxidation) |
12 |
|
|
On-site landfill for solids |
2 |
|
|
Solids composting |
10 |
|
|
Disinfection (0 point minimum to 10 point maximum) |
||
|
No disinfection |
0 |
|
|
Chlorination or comparable |
5 |
|
|
On-site generation of disinfectant |
5 |
|
|
Effluent Discharge (0 point minimum to 21 point maximum) |
||
|
Post aeration |
4 |
|
|
Receiving stream sensitivity (0 point minimum to 6 point maximum)1 |
||
|
VII. "Effluent limited segment" in US EPA terminology; secondary treatment is adequate |
0 |
|
|
VIII. More than secondary treatment is required |
2 |
|
|
IX. "Water quality limited segment" in US EPA terminology; stream conditions are very critical (dry run, for example) and a very high degree of treatment is required |
3 |
|
|
X. Direct recycle and reuse |
6 |
|
|
Land disposal, evaporation |
2 |
|
|
Subsurface disposal |
4 |
|
|
Biological or chemical scrubbers for odor control |
5 |
|
|
Instrumentation (0 point minimum to 6 point maximum)3 |
||
|
The use of SCADA or similar instrumentation systems to provide data with no process operation |
0 |
|
|
The use of SCADA or similar instrumentation systems to provide data with limited process operation |
2 |
|
|
The use of SCADA or similar instrumentation systems to provide data with moderate process operation |
4 |
|
|
The use of SCADA or similar instrumentation systems to provide data with extensive or total process operation |
6 |
|
|
Laboratory control (0 point minimum to 20 point maximum)2 |
||
|
Bacteriological/biological (0 point minimum to 10 point maximum) |
||
|
XI. Lab work done outside the plant |
0 |
|
|
XII. Membrane filter procedures |
3 |
|
|
XIII. Use of fermentation tubes or any dilution method; fecal coliform determination |
5 |
|
|
XIV. Biological identification |
7 |
|
|
XV. Viral studies or similarly complex work conducted on-site |
10 |
|
|
Chemical/physical (0 point minimum to 10 point maximum) |
||
|
XVI. Lab work done outside the plant |
0 |
|
|
XVII. Push-button or visual methods for simple tests (pH, settleable solids) |
3 |
|
|
XVIII. Additional procedures (DO, COD, BOD gas analysis, titrations, solids, volatile content) |
5 |
|
|
XIX. More advanced determinations (specific constituents; nutrients, total oils, phenols) |
7 |
|
|
XX. Highly sophisticated instrumentation (atomic absorption, gas chromatography) |
10 |
|
|
Your Plant Total |
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1 . The key concept is the degree of dilution provided under low flow conditions with points from 0 to 6.
2. The key concept is to credit laboratory analyses done on-site by plant personnel under direct responsible charge with points from 0 to 20.
3. Supervisory Control and Data Acquisition (SCADA) system.
