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Napier-Reid Ltd. 
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Home > Projects> Comayagua , Honduras, Fine Bubble Diffusers 

Comayagua , Honduras, Fine Bubble Diffusers

Project Summary:

Project Type:

Design, Build and Service

Project Category:

International, Textile Industries

Project Purpose:

to remove BOD, COD and colour
Design Flow: 2000 Cubic Metres/day
Year of completion: 2001

Full Description:
Napier-Reid: Dragon Head Hunduras

SBR for a Textile Mill in Honduras
Napier-Reid provided a Sequencing Batch Reactor (SBR) system for Dragon Head Textiles Industrial in Honduras.

In 2000, Shanghai Dragon Corporation, one of the textile industry leaders in China, decided to set up its overseas production base in Honduras to develop North American market. Dragon Head Textiles Industrial was thus established and a wastewater treatment facility was needed.

The Treatment Process
Napier-Reid worked as a contractor to design a two train SBR system for treating the wastewater that has high: colour, chemical oxygen demand (COD), PH value and temperature with design flow of 1,900m3/day.

The treatment system includes the following components: an equalization tank with PH controller, nutrient addition units (nitrogen, phosphorous), aeration equipment complete with membrane diffusers, Uni-FlowTM vertically actuated decanters, waste sludge pumps, drying beds (for sludge dewatering ), a chlorine contact tank ( for final colour destruction) with chemical feed system, process control and associated instrumentation elements.

Due to the nature and temperature of the wastewater, we included a screen for capture and removal of fibers and a cooling tower to reduce the temperature of wastewater entering the biological process to below the threshold level of 37C, required for biological metabolism.  

Design Flow:1,900m3/day


Effluent (specified)

BOD5 (mg/L)



COD (mg/L)






Colour (Pt-Co units)



Temperature (C)



The system is fully operational to the satisfaction of the customer and the local environmental authority.


SBR Decanter

Dragon Head Textiles, Honduras

Design Flow: 2,000m3 per day



Fine Bubble Diffusers

Dragon Head Textiles, Honduras

Design Flow: 2,000m3 per day




Dragon Head Textiles, Honduras

Design Flow: 432m3 per day


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