Productive utilization of pig farm wastes: a case study for developing countries

• Published in: Resources, Conservation and Recycling [RESOUR., CONSERV. RECYCLING]. Vol. 11, no. 1-4. 1994 Vol. 11; no. 1; pp. 245 - 259
• Main Authors: Polprasert, Chongrak, Yang, P.Y., Kongsricharoern, Noppadol, Kanjanaprapin, Wilai
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.01.1994; Oxford Elsevier
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; Biological treatment of sewage sludges and wastes; Biotechnology; Environment and pollution; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; Industrial applications and implications. Economical aspects; Use of agricultural and forest wastes. Biomass use, bioconversion; Anaerobiosis; Compost; Monocotyledones; Pig barn; Biological purification; Silage; Upgrading; Pontederiaceae; Aquatic weed; Angiospermae; Methanogenesis; Eichhornia crassipes; Spermatophyta; Economic aspect; Agricultural waste; Waste water purification; Rearing by-product
• ISSN: 0921-3449; 1879-0658
• DOI: 10.1016/0921-3449(94)90093-0

This paper presents a case study on pig farm waste management in which pig manure is stabilized in two-stage anaerobic reactors (to produce methane), while pig farm wastewater is treated in water hyacinth ponds from which the harvested water hyacinth plants are used in the production of silage (animal feed) or compost fertilizer. The results suggest the technical feasibility of applying these technologies to treat and recycle pig farm wastes. Cost/benefit analysis reveals the option to produce methane gas and silage to be financially viable after 15 years of operation. A management concept of waste recycling programs is presented, including relationships among objectives, constraints and implementation plan. Decision on a waste recycling program should not be based only on cost/benefit analysis, but also on the pollution control and public health improvement to be gained.