Reliable Flotation Units for Wastewater Treatment

Case study: Brown’s Bay Packing Company (Campbell River, BC, Canada)

TYPE OF INDUSTRY – Fish processing
MODEL OF DAF-UNIT – FT-20Z with static mixer
START OF OPERATION – 2019 March

Issue

The customer was looking for the solution to reduce pollutants in wastewater from the fish processing plant, after the FBR advanced oxidation process. Moreover, they were looking for the compact and easy to operate system, with low operating costs.

Solution

Based on initial information and theoretical calculations, Esmil in cooperation with our representative in Canada Archer Separation Inc. offered DAF-unit FT-20Z.

Wastewater Source	seawater with fish farm byproducts
Operating Time	16-20 h/day, 3-4 days/week
Flow Rate	20-40 m³/h
Feed TSS Concentration	800-1200 ppm
Effluent TSS Concentration	80-100 ppm

ESMIL - Case study - Brown’s Bay Packing Company (Campbell River, BC, Canada)

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Case Study: Fish Processing Plant (Santiago, Chile)

In 2017 the dissolved air flotation complex for local wastewater treatment of fish processing plant in Los Lagos region had been installed by our partner Aguas Sipra S.A., including such equipment:

Fine drum screen RMB TP 6/6,
DAF unit FT-25,
Tubular flocculator,
Saturation system for white water preparing,
Pumps for the complex,
Automation system for the complex, including control system with sensors.

Esmil DAF-Unit Flotator

Esmil DAF complex has customized design for the particular application. The object’s features required high amounts of dissolved air to be fed into wastewater to tackle high loads of contaminants. The complex’s capacity is 18 m³/h.

The efficiency of the complex is as follows:

Los Lagos, Chilie Project Data

Parameters	Input concentration, [mg/L]	Efficiency, [%]	Output concentration, [mg/L]
Total suspended solids (TSS)	6,541	95	327
Biochemical Oxygen Demand (BOD5)	10,696	40	6,418
Nitrogen, Total Kjeldahi (NTK)	726	20	581
Oil and Grace (O&G)	975	90	98
Dissolved solids (DS)	81	60	32

In the result the customer got specially designed wastewater treatment system which is fully solves effluent requirements. In this project Esmil confirms advantages if it’s developed DAF technology, as well as appropriateness of approach to use just the highest quality components available. Equipment operates steady well, which is really important for such a distant projects.

More information about project in REVISTA INDUAMBIENTE Ed. N°148 / Sep-Oct 2017, p.42-43