Utilization of Aquatic Weeds as Co-digestion with Swine Manure for Biogas Production

Abstract

Zero waste model should be applied in the management of agricultural waste, especially, water
and residue waste from swine farms that can be used for biogas production. Aquatic weeds can be used
for waste water treatment. Biogas production by co-digestion of swine manure and aquatic plants is an
interesting method for waste management in swine farms. This study was carried out with the aim to assess
the efficiency of biogas production and ability to remove organic matter in the forms of biochemical oxygen
demand (BOD), chemical oxygen demand (COD), total solid (TS) and total volatile solid (TVS) of co-digestion
between swine manure and four aquatic weeds including Hydrilla verticillata (L.f.) Royle, Ceratophyllum
demersum L., Pistia statiotes L. and Azolla pinnata R.Br., The results showed that H. verticillata, C.
demersum, P. statiotes and A. pinnata had high efficiency to produce biogas. At the ratio of 3.75: 1.25%TS,