Method for the manufacture of fodder and/or soil improving agents from waste material

DETAILED DESCRIPTION OF THE INVENTION The method according to the invention, basically, resides in that the environmentally disturbing aquatic plants are obtained, i.
e.
harvested, if desired comminuted and the plant pieces which, if desired, have been pressed are mixed with about 20 to about 70 percent by weight of organic waste material of the food industry and/or agriculture having a dry substance content of at least 20 percent by weight and inoculating agents and additives for the biological degradation respectively known per se, and anaerobically or aerobically fermented for about 2 to about 45 days, preferably for about 10 to about 30 days, by methods known per se.
Thereby, the anaerobically fermented material provides a fodder, whilst by aerobic fermentation a soil improving agent is obtained.
In the method according to the invention, as environmentally disturbing aquatic plants, water nymph (Naias armata), duck weed (Lemna gibba), pond weed (Potamogeton spp.
), rootless hornwort plants (Ceratophyllum demersum), cattail (Typha domingensis), common reed (Phragmites australis), cyperacious plants and tamarisk plants as well as specifically water hyacinths (Eichhornia crassipes) can be used.
In the method according to the invention, it is also possible to use mixtures of one or more of these plant species.
According to a preferred embodiment of the method according to the invention for the manufacture of fodder, the comminuted pieces of leaves and stems of the aquatic plants which, if desired, have been pressed, are mixed with 20 to 70 percent by weight, more preferably 40 to 60 percent by weight, of the organic waste material of the food industry and/or agriculture having a dry substance content of at least 20 percent by weight and inoculating agents and additives for the biological degradation respectively known per se and anaerobically fermented for 2 to 45 days, preferably 10 to 30 days, and even more preferably 10 to 20 days.
As organic waste material of the food industry and/or agriculture, cellulose, hemicellulose and/or lignine-containing organic waste materials, specifically rice straw, milled cotton seed shells, extracted sugar cane and/or corn stems can be used