Marinfloc AB, Industrivägen 10 , 472 95 Varekil, Sweden

Phone: +46 (0)304 606300

Fax: +46 (0)304 10051

E-mail: marinfloc@marinfloc.com

CD Pre Treatment

Process Description

CD

Pre

T

- PD

—20

15-0

5-0

4

Made in Sweden

by Marinfloc

Brief description of the CD-Pre Treatment system

The Marinfloc CD-Pre Treatment system is an emulsion breaking unit to install in front of the Oily Water Separator

to break the emulsions these systems have so much difficulties in treating. It is a fully automatic system based on

the emulsion breaking technlogy of flocculation and dissolved air flotation directly derived from the patented Ma-

rinfloc Oily Water Separator CD model.

The CD-Pre Treatment feeds the Oily Water Separator (OWS) clean water so it can discharge <15 PPM. This is nor-

mally not possible as the vast majority of OWS-systems can not treat emulsions or relies on filtering which imposes

tremendous operational costs and sadly often leads to willful manipulation by the crew.

Flocculation and Flotation.

As on almost all land based waste water treatment systems the CD-Pre Treatment unit utilizes flocculation to re-

move emulsified oil, chemicals, particles, dirt etc. that remains in the water after the free oil has been removed.

The flocculation, which is the heart of the process, is achieved by means of chemicals to break the emulsions and to

make all other contaminants come out of suspension and form so called flocks. The system use two types of chemi-

cals for this purpose, a Coagulant and a Flocbooster. The dosage is normally 0,3-0,4 litre/ton bilge water.

The flocks are separated from the water by means of forced flotation in the flocculation tank and are removed in

the top section of the flocculation tank by the drain pump. The normal sludge generation is 2-3% of the total influ-

ent.

The water is lead through a cascade to the bag filter for filtration of but it is in the flocculation stage that 99% of all

contamination is removed.

Filtration.

Even though the water is very clean after the flocculation tank it may contain some small flocks and the system has

a 25µ bag filter to ensure an effluent of < 15PPM.

Typical inlet Flocculation Floatation Outlet < 15 PPM Picture from top of flocculation

tank where flocculent sludge is

removed from the cleaned water.

The CD-Pre treatment system can be upgraded to a Marinfloc CD system approved to the latest IMO regulation MEPC

107(49). This is easily done with an additional module.

Please contact sales@marinfloc.com for more detailed information

Marinfloc AB, Industrivägen 10 , 472 95 Varekil, Sweden

Phone: +46 (0)304 606300

Fax: +46 (0)304 10051

E-mail: marinfloc@marinfloc.com

Made in Sweden

by Marinfloc