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Trisha Sallakonda
3rd Place Science Fair
Environmental Science
Circular Economy

Trisha Sallakonda

Emerald High School '28
Dublin, California

From studying plastic pollution correlations to simulating circular economy models for urban waste management and winning 3rd place at her ACSEF

3rd Place ACSEF
"Waste Loop: Simulating Circular Economy Models for Urban Organic Waste Management"

Where Trisha Started

Her Background

  • • 10th grader at Emerald High School in Dublin, CA
  • • Prior research on plastic pollution and income correlation
  • • Earned 4th place at ACSEF with previous project
  • • Active in basketball, music, and dance
  • • Leadership class member and school event organizer
  • Rated 1/5 in programming experience

Her Goals

  • • Continue research on environmental sustainability
  • • Present work at conferences and science fairs
  • • Publish a peer-reviewed research paper
  • • Learn AI and machine learning techniques
  • • Build a competitive edge for college admissions

In Her Own Words

"I recently conducted my own research to study the correlation between single-use plastic, ocean waste plastic, tap water plastics, and income. At the YRI Fellowship, I want to continue my research on diverse topics, be able to present these at conferences, and be able to publish a paper."

— Trisha's YRI application, September 2025

The Research

Working with YRI mentors, Trisha tackled a critical environmental challenge: urban organic waste ending up in landfills. She designed simulation models comparing composting and biogas pathways, proving that circular economy strategies can dramatically reduce emissions and recover valuable resources at the household level.

Waste Loop: Simulating Circular Economy Models for Urban Organic Waste Management

Problem:

Urban organic waste sent to landfills causes methane emissions and wastes recoverable resources

Method:

System dynamics and agent-based models simulating composting vs. biogas pathways

Variables:

Compost potential, recycling potential, biogas generated, CO₂ avoided

Results:

Both circular pathways outperformed landfill disposal in emissions and resource recovery

Composting vs. Biogas: A Data-Driven Comparison

Trisha's research filled a gap in the literature by comparing composting and biogas pathways at the household scale. Her simulations showed that composting excels at nutrient recovery, while biogas provides renewable energy and fossil fuel substitution. High-participation households achieved near-complete landfill avoidance, demonstrating that individual action can drive systemic change.

"The results confirm that circular waste pathways outperform linear landfill disposal. Composting excels in nutrient recovery, while biogas provides renewable energy and emission reduction."

— From Trisha's paper

Key Findings

2

Circular Pathways Modeled

CO₂

Emissions Reduced vs. Landfill

~100%

Landfill Diversion Possible

The Outcome

ACSEF

3rd Place at ACSEF

Competition:

ACSEF

Placement:

3rd Place

Field:

Environmental Science & Sustainability

Status:

High school sophomore (Class of 2028)

Before

4th place science fair, no programming experience, wanted to learn research methodology

After

3rd place ACSEF with original simulation-based environmental research

The Bigger Picture

1 → 5

Programming skill growth during the fellowship

4th → 3rd

Improved science fair placement with stronger research

3

Real-world applications: urban planning, policy, education

Ready to Start Your Research Journey?

Join the YRI Fellowship and work with expert mentors to conduct original research, present at prestigious conferences, and build a profile that stands out.

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