BIOFLUID EW 6 - 50
Biodisk WWTP with build-up culture and minimum operating and maintenance requirements
Use
Waste water treatment plants with rotary biodisks BIOFLUID EW are intended for treatment of sink waste water also in places with higher requirements for the quality of drain from the WWTP, especially as to the nitrogen and phosphorus content.
Type series
Domestic waste water treatment plant with rotary biodisks is made in three variants, each of them has 6 type sizes.
- BIOFLUID EW-N (BF EW-N) – waste water treatment unit with a biocontactor with increased oxygenation capacity (WWTP is designed as nitrifying).
- BIOFLUID EW-DN (BF EW-DN) – BF EW-N unit with a submerged anoxic biofilter (WWTP is designed as nitrification-denitrification unit).
- BIOFLUID EW-DNK (BF EW-DNK) – BF EW-DN unit with coagulating-flocculating unit with ferrous salt dosing (WWTP is designed as nitrification-denitrification unit with chemical precipitation of suspended solids and phosphorus).
Supplies
Are made in type-specific plastic reservoirs intended for installation into excavation pits to a foundation plate. The WWTP is dimensioned for backfilling, eventually concreting-in.
Function description
Domestic WWTPs BIOFLUID EW are made in type series of 6 sizes. Each of them consists of a compact PP container divided into the separate functional areas by dividing walls.
Waste water enters the sedimentation zone where coarse impurities are trapped and anaerobic-stabilized. From there, the waste water is pumped by an elevator pump into the activation part with rotary biodisk. Waste water is treated by the biomass attached to the biodisk as well as by the biomass from suspension. In treatment plants variant BF EW-DN and BF EW-DNK, a submerged anoxic biocolumn is installed before them. From the activation part, the mixture of waste water and activated sludge flows into the final sedimentation area where separation of water and activated sludge take place. Separated water flows into the discharge trough through the overflow edge, activated sludge from the lower part of the final sedimentation area drifts back to the activation area. Excess activated sludge and part of the waste water return to the sedimentation area by means of a float valve. This provides for recirculation as well as desludging of the plant’s final sedimentation part. To reduce the content of phosphorus, insoluble solids, etc., ferrous coagulant is dosed into the recirculation flow of BF EW-DNK plants.
Advantages of WWTP BIOFLUID EW 6 to 50:
- Low cost of acquisition and operation
- Minimal operating requirements
- High efficiency of treatment
- Reliable operation
- Simple installation and building-in
- It is possible to interrupt the input of waste-water for up to 60 days (the treatment plant is in operation), then it is possible to re-establish full WWTP loading without worsening the discharge parameters.
Basic data
| Typ BIOFLUID EW - N | 6 EW | 12 EW | 20 EW | 30 EW | 40 EW | 50 EW | |
|---|---|---|---|---|---|---|---|
| No. of equivalent inhabitants | EI | 6 | 12 | 20 | 30 | 40 | 50 |
| Waste-water quantity Q24 | m3/T | 1,2 | 2,4 | 4 | 6 | 8 | 10 |
| - Qmax | m3/St. | 0,12 | 0,24 | 0,4 | 0,6 | 0,8 | 1 |
| Basic dimensions length × width height |
m m |
1,2×2,2 2,68 |
1,6×2,2 2,68 |
2,0×2,4 2,68 |
2,4×2,4 2,68 |
3,2×2,4 2,68 |
4,0×2,4 2,68 |
| Oxygenation capacity | kg/d | 0,31 | 0,62 | 0,93 | 2,84 | 3,55 | 4,26 |
| Energy demand (max) | kW/h | 3,0 | 3,4 | 4,6 | 4,6 | 6,0 | 7,2 |
| Weight | kg | 545 | 674 | 1075 | 1345 | 1480 | 1623 |
| Type BIOFLUID EW – DN, DNK | 6 EW | 12 EW | 20 EW | 30 EW | 40 EW | 50 EW | |
|---|---|---|---|---|---|---|---|
| No. of equivalent inhabitants | EI | 6 | 12 | 20 | 30 | 40 | 50 |
| Waste-water quantity Q24 | m3/T | 1,2 | 2,4 | 4 | 6 | 8 | 10 |
| - Qmax | m3/St. | 0,12 | 0,24 | 0,4 | 0,6 | 0,8 | 1 |
| Basic dimensions length ×width height |
m m |
1,13×2,1 2,4 |
1,73×2,1 2,4 |
2,0×2,4 2,48 |
2,4×2,4 2,48 |
3,2×2,4 2,48 |
4,0×2,4 2,68 |
| Oxygenation capacity | kg/d | 0,67 | 1,39 | 2,11 | 2,84 | 3,55 | 4,26 |
| Energy demand (max) | kW/d | 4,6 | 5,1 | 5,5 | 4,6 | 6 | 7,2 |
| Weight | kg | 545 | 674 | 1075 | 1345 | 1480 | 1623 |
Treated water quality
| Indicator | Usually attained average values in outlet | |||
|---|---|---|---|---|
| BF EW - N | BF EW - DN | BF EW - DNK | ||
| BOD5 | (mg/l) | 25 | 25 | 25 |
| COD | (mg/l) | 90 | 90 | 90 |
| Insoluble solids | (ml/l) | 0,3 | 0,3 | 0,3 |
| N-NH4+ | (mg/l) | 10 | 10 | 10 |
| NTOT | (mg/l) | - | 25 | 25 |
| PTOT | (mg/l) | - | - | 3 |
Nitrogen values are attained at water temperature exceeding 12 °C.
Waste-water treatment plants BIOFLUID EW were tested in operation by the T. G. Masaryk Water Research Institute in Prague, and they were recommended for installation in appropriate localities.
