Showing posts with label symbiotic algal bacterial wastewater treatment. Show all posts
Showing posts with label symbiotic algal bacterial wastewater treatment. Show all posts

Friday, November 28, 2008

Use of Algae in Wastewater Treatment

Another technology that uses Green Algae in Wastewater Treatment.

http://www.algaewheel.com/algaewheel-technology.cfm

ALGAEWHEEL TECHNOLOGY
Product Development History. In 1995 Mr. Christopher Limcaco, began development of the algaewheel® technology because of his passion for aquatic life. His mission was to develop a filtration system that would allow him to completely recreate a natural environment within his aquarium. The system that was developed proved tremendously effective in achieving a naturally balanced eco-environment and the aquatic life within the aquarium thrived. Mr. Limcaco patented the technology and developed the manufacturing and shipping processes for the commercial distribution of algaewheel treatment systems through a company called Aquatic Engineers, Inc. In 2003 this technology was licensed to a firm now known as Aquariums By Design, and this company continues to provide service for hobby applications in the marine and tropical fish industry.

How it WorksThe technology was initially developed for use as an aquatic life support system in mariculture and aquaculture systems. The advantage of the algaewheel is in its name; it provides the proper environment for algal growth. Wave surging and light pulsing are basic environmental conditions required for algae growth and these are provided through the patented design. The wheel is designed to be significantly buoyant in water, requires no mechanical drive mechanism, and is rotated using a constant air flow. Each wheel is supported in water using a modular plastic grid system. The wheel and all components are made of UV stabilized reprocessed plastics, are lightweight, modular, easily assembled in the field, and corrosion proof.

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Why use Green Algae when Diatoms can do a better job?

Symbiotic algal bacterial wastewater treatment

Interesting study of use of Alage in Wastewater Treatment.
http://www.iwaponline.com/wst/05511/wst055110165.htm
Water Science & Technology Vol 55 No 11 pp 165–171 © IWA Publishing 2007 doi:10.2166/wst.2007.351

Symbiotic algal bacterial wastewater treatment: effect of food to microorganism ratio and hydraulic retention time on the process performance
M. Medina and U. NeisInstitute of Wastewater Management and Water Protection, University of Technology Hamburg Harburg, FSP 1-02, D-21071 , Hamburg, Germany (E-mail: marcela.medina@tuhh.de)
ABSTRACT
Algal incorporation into the biomass is important in an innovative wastewater treatment that exploits the symbiosis between bacterial activated sludge and microalgae (Chlorella vulgaris sp. Hamburg). It allows a good and easy algae separation by means of clarification. The effect of process parameters food to microorganisms ratio (F/M) and hydraulic retention time (HRT) on the process performance, evaluated by settleability, microalgae incorporation to biomass and nutrient removal, was studied. HRT hinted at a significant influence in the growth rate of algae, while F/M turned out to be important for stability when algae are incorporated into the biomass. This parameter also affects the total nitrogen removal of the treatment. Stable flocs with incorporated algae and supernatants with low free swimming algae concentrations were obtained at high HRT and low F/M values.
Keywords: Chlorella vulgaris; F/M (food to microorganism) ratio; hydraulic retention time; symbiotic algal bacterial wastewater treatment; symbiotic biomass