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Augmenting Lagoon Process Using Reactivated Freeze-dried Biogranules.

Roya Pishgar1, Rania Ahmed Hamza2, Joo Hwa Tay2

  • 1Department of Civil Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada. roya.pishgar@ucalgary.ca.

Applied Biochemistry and Biotechnology
|February 26, 2017
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Summary
This summary is machine-generated.

Freeze-dried biogranules enhance wastewater treatment in lagoon basins. Optimal conditions improve chemical oxygen demand removal efficiency and reduce retention time, offering a sustainable solution for wastewater management.

Keywords:
Biological wastewater treatmentDetention timeLagoonNutrientsReactivated biogranulesTreatment augmentation

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Area of Science:

  • Environmental Microbiology
  • Wastewater Engineering
  • Biotechnology

Background:

  • Lagoon basins are common in wastewater treatment but often face challenges with efficiency and retention time.
  • Biogranules offer a potential solution for enhancing biological wastewater treatment processes.
  • Freeze-dried biogranules present an opportunity for easier storage and application in existing systems.

Purpose of the Study:

  • To evaluate the feasibility of using freeze-dried biogranules in lagoon basins.
  • To determine the optimal operational conditions for biogranule-based lagoon treatment.
  • To assess the impact of biogranules on treatment performance and detention time.

Main Methods:

  • Laboratory-scale batch studies were conducted to simulate lagoon conditions.
  • Different operational parameters, including biogranule dosage, nutrient ratios, and mixing, were investigated.
  • Chemical oxygen demand (COD) removal and ammonia-nitrogen (NH4-N) concentrations were monitored.

Main Results:

  • Optimal anaerobic treatment used 0.1 g/L biogranules, achieving 80-94% COD removal in 7-10 days.
  • Optimal aerobic treatment with a COD/N/P ratio of 100/13/0.8 and 0.2 g/L biogranules reduced treatment time to 2-3 days with 88-92% COD removal.
  • High concentrations of COD and ammonia inhibited biogranule activity, while mixing improved performance.

Conclusions:

  • Freeze-dried biogranules are a feasible and sustainable technology for augmenting lagoon wastewater treatment plants.
  • Biogranule application can significantly improve effluent quality and reduce required retention times.
  • Onetime inoculation with fresh granules proved most effective for sustained treatment efficiency.