BIOREACTOR LANDFILLS

MADE BY: ANKITA PAYAL

SONALI FARTIYAL

BIOREACTOR LANDFILL -AN INTRODUCTION

An innovative technology for biostabilization of municipal solid waste.

A controlled landfill where liquid and gas conditions are actively managed in order to accelerate or enhance biostabilization of the waste.

Control, monitor and optimize the waste stabilization process rather than simply contain the wastes.

It requires certain primary technologies to enhance and control the waste stabilization process like liquid or air addition, temperature, pH and nutrient level.

CONVENTIONAL VS. BIOREACTOR LANDFILL

Basic principle of conventional landfill is to contain and store the waste

Called as “Dry Tomb” landfill

Takes about 30-50 years for decomposition

Leachate generation and release of landfill gases can pose long term environmental risk

Basic principle of a bioreactor landfill is the treatment of waste by decomposition

Decomposition occurs in a shorter period of about 5-10 years

Tackles some of the major environmental problems

TYPES OF BIOREACTOR LANDFILLS

AEROBIC BIOREACTOR

ANAEROBIC BIOREACTOR

HYBRID BIOREACTOR

AEROBIC BIOREACTOR

LINER AND

LEACHATE

COLLECTION SYSTE

M

LEACHATE STORAGE

RECIRCULATION SYSTEM

LANDFILL GAS CONTR

OL SYSTE

MCOMPONENTS

TECHNIQUES OF LIQUID ADDITION

Recirculation of leachate

Surface Systems

• Spray irrigation

• Drip irrigation

• Tanker truck application

• Infiltration ponds

• Leach field

• Surface trench

Subsurface System

• Vertical injection wells

• Horizontal trenches

• Buried infiltration galleries

• Combination of horizontal lines and

vertical wells

SURFACE ADDITION SYSTEM

INFILTRATION PONDS

HORIZONTAL TRENCHES

VERTICAL WELLS

LANDFILL GASES

Direct by-product of anaerobic waste decomposition

Gas from anaerobic decomposition of waste is primarily composed of methane (CH4) and carbon dioxide.

Other trace components such as water vapor, hydrogen sulfide and a variety of organic chemicals, are also founds in LFG.

MONITORING CATEGORIES

Liquid Volume Liquid Head on Liner Leachate characteristics Landfill Gas Quality Landfill Gas Volumes Gas Emissions Waste Characteristics Landfill Settlement In-situ Instrumentation

MONITORING AND PROPER RECORD KEEPING

WHY BIOREACTOR LANDFILLS?

WASTE STABILIZATION LEACHATE TREATMENT, CAPITAL AND

OPERATING COST POTENTIAL FOR AIR SPACE RECOVERY LANDFILL GAS GENERATION RATES ENVIRONMENTAL IMPACTS POST CLOSURE CARE, MAINTENANCE AND

RISKS

CHALLENGES

• Leachate Seepage• Temperature Control• Gas and Odor Control• Fire and Explosions

LEACHATE SEEPS

NON-TECHNICAL BARRIERS TO THE BIOREACTOR LANDFILLS

• Limited regulatory awareness and negative perception.• Dearth of site-specific performance quantification.• Limited availability of project economic assessments.• Insufficient project sustainability experience.• Lack of financing experience.• Extended time expectations for planning permitting and licensing.• Increased regulatory constraints and conditions.

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