EM21A - PERIPHERAL DRIVE CLARIFLOCCULATOR WITH GATE MIXERS
| Application | Clarifying of primary waste water. |
| Characteristics | The equipment consists of a flocculation zone, inside the cone, a clarification zone, outside the cone, a sedimentation zone at the tank bottom, bottom scrapers to convey the settled sludge to the central drain well, radial ditches to collect the clarified water. |
| Operation | The sedimented sludge flocs are mixed with the water to be treated by the gate mixers. The solids in the incoming water are mixed with the settled sludge flocs. The new flocs volume increases and they tend to sediment more easily. |
| Materials | Hot dip galvanized carbon steel or Stainless steel. |
| Installation | In a concrete tank. |
| Tank diameter | From 8 to 60 m. |
| Advantages | High efficiency of sedimentation. |
| Optional | Scum removal system. |
OUTLINES OF THE PROCESS
The flocculation must occur in a moderate and not turbulent way.
This will help the sludge flocs creation and ageing.
OPERATION DESCRIPTION
In the Clariflocculator with gate mixers the suspension is flocculated inside the flocculation cylinder by means of slow gate mixers, minimum no. 2 (at 180° from each other) and maximum no. 4 (at 90° from each other).
The reagents are added directly into the water to be treated, before it enters the clariflocculator.
The flocculation, which takes places inside the cylinder, makes the suspended particles gather and grow.
The sludge in suspension, which comes out of the flocculation cylinder, tends to sediment.
The clarified water is collected in the upper part through a circular ditch.
The sludge sedimented on the bottom is conveyed to the central drain well by some scrapers.
In the Clariflocculator:
• the flocculation chamber is inside the cylinder which contains the gate mixers
• the sludge settles under the flocculation cylinder
The function of the gate mixers is:
• mixing the sludge flocs and making them become larger
TECHNICAL DATA
| 1.1 | Design flow rate | : m³/h | (*) |
| 1.2 | Flocculation cylinder useful volume | : m³/h | |
| 1.3 | Flocculation contact time | : min. | |
| 1.4 | Number of gate mixers | :n° | from 2 to 4 |
| 1.5 | Gate mixers gradient of velocity | : sec-1. | from 20 to 40 |
PECULARITIES
Il chiariflocculatore mod. EM21B ha un ponte rotante con delle raschie radiali. Le turbine di flocculazione sono sostenute dal ponte rotante.
Il chiariflocculatore, avendo un ponte rotante, non può essere dotato di canalette radiali.
CLARIFLOCCULATOR ACELATOR TYPE
ECOMACCHINE in November 2021 has completed the supply of a clariflocculator "ACELATOR" type for the treatment plant of RAVENNA SERVIZI.
The unit can be utilized for clarifying or for clarifying and decarbonating the inlet water with lime.
The unit is able to treat up to 1,200 m3/hr with a maximum torbidity of 10 NTU at outlet.
REVAMPING OF PRODUCTION WATER TREATMENT AND RE-INJECTION
ECOMACCHINE in November 2021 completed and shipped a Dissolved Gas Flotation (DGF) package complete with saturation unit.
CLARIFLOCCULATOR ACELATOR TYPE
ECOMACCHINE in November 2021 has completed the supply of a clariflocculator "ACELATOR" type for the treatment plant of RAVENNA SERVIZI.