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Anaerobic pretreatment and increased solid destruction for vegetable solid waste codigested with cattle slurry.

Mandachittibabu¹, R Saravanane, R Sivacoumar

¹Department of Civil Engineering, Pondicherry Engineering College, Pondicherry-605 014, India.

Journal of Environmental Science & Engineering

|December 1, 2010

Summary

Pretreatment of vegetable solid waste enhanced its anaerobic co-digestion with cattle slurry and sewage sludge. This process significantly increased biogas production, optimizing waste management and renewable energy generation.

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Area of Science:

Environmental Science
Waste Management
Renewable Energy

Background:

Municipal and industrial solid wastes contain significant organic fractions, contributing to land and groundwater pollution.
Effective treatment of organic waste is crucial for environmental protection and resource recovery.

Purpose of the Study:

To determine the characteristics of vegetable solid wastes, cattle slurry, and sewage sludge for anaerobic co-digestion.
To investigate the treatability of vegetable solid wastes through co-digestion with municipal sewage and cattle slurry in various ratios.

Main Methods:

Laboratory batch-scale studies were conducted to assess the effects of process parameters on anaerobic digestion.
Vegetable solid waste was pretreated to enhance its co-digestion efficiency.

Main Results:

Pretreatment of solid waste led to effective co-digestion of vegetable solid waste.
Co-digestion significantly increased biogas yield compared to untreated waste.

Conclusions:

The optimal ratio for effective co-digestion and maximum biogas yield was found to be 1:2 (vegetable waste to inoculum).
The inoculum comprised cow dung and anaerobic sewage sludge in a 1:1 ratio.
Anaerobic co-digestion presents a viable strategy for managing vegetable solid waste and generating biogas.