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The effect of calcium on the anaerobic digestion treating swine wastewater

Paper ID Volume ID Publish Year Pages File Format Full-Text
4920 258 2006 6 PDF Available
Title
The effect of calcium on the anaerobic digestion treating swine wastewater
Abstract

A series of experiments with 0, 1, 3, 5, and 7 g Ca2+/l using calcium chloride were performed to evaluate the effect of various calcium concentrations on anaerobic digestion of swine wastewater. The addition of 3 g/l gave the best performance. On the other hand, the calcium concentrations of 5–7 g/l had an inhibitory effect on anaerobiosis. The lag phase durations expected in biogas production were 28–31 days with the addition of 0–3 g/l of calcium, and 43–52 days for calcium concentrations of 5 g/l or more. The concentrations of total volatile fatty acids decreased to less than 100 mg/l with calcium concentrations of 3–7 g/l. On the other hand, propionate and i-valerate concentrations remained over 4 and 0.8 g/l, respectively, when 1 g/l or less of calcium was added.

Keywords
Anaerobic digestion; Batch; Calcium; Lipid; Swine wastewater; VFAs
First Page Preview
The effect of calcium on the anaerobic digestion treating swine wastewater
Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 30, Issue 1, 1 May 2006, Pages 33–38
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering