Biogas production from duck manure by anaerobic digestion

Date of Publication

1997

Document Type

Master's Thesis

Degree Name

Master of Science in Chemical Engineering

Subject Categories

Chemical Engineering

College

Gokongwei College of Engineering

Department/Unit

Chemical Engineering

Thesis Adviser

Carlito M. Salazar

Defense Panel Chair

Pag-asa D. Gaspillo

Defense Panel Member

Susan A. Roces
Florinda Bacani

Abstract/Summary

This study investigates the production of biogas from duck manure by anaerobic digestion. An all-metal fixed dome digester was used for production of methane from duck manure under mesophilic temperatures (20-40 degrees Centigrade). Biogas production was carried out on batch and semi-continuous processes. Different manure-water proportions and varying amounts of starter were studied under batch process. Results for this process showed that 1:1 with 25 percent starter was the highest producer of biogas than 1:1 with 20 percent starter and 1:2.5 with 25 percent starter. The cumulative biogas volume for 1:1 with 25 percent starter was 792.71 liters from 80 liters of feed digested for 30 days. This ratio also gave the highest methane content of 68 percent. For semi-continuous process, the effects on biogas production of different hydraulic retention times and different organic loading rates were investigated. Manure-water ratio of 1:1 was fed into the digester at varying feed rates and organic loading rates ranging from 0.1286 g - 1.60 g Chemical Oxygen Demand (COD) per L-day. Results showed that highest methane conversion was 2.8 liters CH4 per gram COD removed was achieved at 10-day Hydraulic Retention Time (HRT) with methane content of 63 percent. Highest methane content, however, was achieved at 21-day HRT with 68 percent. An average reduction of 65 percent on COD was attained for batch process and at 21-day and 10-day HRT.

Abstract Format

html

Language

English

Format

Print

Accession Number

TG02627

Shelf Location

Archives, The Learning Commons, 12F Henry Sy Sr. Hall

Physical Description

106 leaves

Keywords

Biogas; Ducks -- Manure; Biodegradation; Bacteria; Anaerobic; Organic wastes -- Recycling; Methane

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