Industries where algae can be used to treat waste waters:
Effluent treatment using Beneficial Algae
Advantages of waste water reuse for agriculture include the following:
Reduced prevalence of diseases which are caused by the use of untreated waste water for irrigation where water is unavailable for the cultivation of crops.
It will help to conserve freshwater resources and their wise use particularly in areas under water stress.
It will avoid surface water pollution caused by the release of untreated waste water in rivers and lakes.
Contribution to better nutrition and food security for many households (WHO, 1989).
Bio-fertilizer production units
Municipal Waste Waters
Distillery & Breweries
Meat processing plants
Pulp and PaperTextiles
Dyes and pigments,
WWTALG for Wastewater Treatment
Produce oxygen with low energy input
Remove soluble N and P
CO2 fixedBiomass produced
Rarely settle well
Failure to meet suspended solids limits (~45 mg/L)
Interfere with disinfectionBiomass produced
Contents of WWTALG:
Add CO2 to Balance C: N: P Algae: C: N: P = 50: 8:1
Wastewater: C: N: P = 20: 8: 1
Salient Features of WWTALG: Improved and accelerated treatment. Biomass fuel provides greenhouse gas abatement. WWTALG savings: ~Rs100 per L oil produced (Marginal oil cost is only for extraction/processing). Energy used in WW treatment decreases: 4 KWH saved per L oil produced.Fuel production residue becomes fertilizer.