Dissolved air flotation is a well know technology to remove suspended solids (TSS), biochemical oxygen demand (BOD5), fats, oils and grease (FOG), phosphorus (P) or nutrients from industrial wastewater.
DAF-units are used for preliminary or complete wastewater treatment, as a part of the physicochemical treatment complex. Operating principle is based on Dissolved Air Flotation process, used for the separation of suspended solids, oil and greases.
DAF systems are commonly used to meet a variety of treatment goals including:
- Product recovery and reuse;
- Pretreatment to meet sewer discharge limits;
- Pretreatment to reduce loading on downstream biological treatment systems;
- Biological treatment effluent;
- Thickening of biosolids.
ESMIL DAF-units can be offered as a separate product or integrated in a complete solution. Fifteen (15) different models to meet a variety of applications and flow ranges 8-1,300 cfh.
On request, ESMIL DAF-unit can be supplied with:
- flocculation tube;
- flow control system;
- pH control system;
- reagents blend and feed system;
- wastewater feed pump;
- compressor;
- removable covers;
- advanced control system with variety of control platforms (Allen Bradley, Siemens, Schneider Electric);
- access platforms and stairs;
- containerized solution;
- customization according to customer request;
- etc.
Advantages of ESMIL DAF-Units
- energy-optimized saturation system, due to direct air injection to the recirculation pump.
- high TSS, FOG and BOD removal efficiency– suspended solid removal up to 95 %, oil and grease removal up to 98 %, BOD5 removal up to 65 %.
- optimal use of reagents, carried out during tests.
- fully automated operation of the whole complex.
- compact design saves space simultaneously ensures effective retention time for the floatation process.
- reduced installation time as unit is shipped as skid mounted complex.
- made from AISI 304 stainless steel. Option in AISI 316 on demand.
Construction of ESMIL DAF-Unit
One of ESMIL’s core values is responsibility. We not only supply the highest quality equipment, but we are also responsible for its performance during entire service life.
