1. Technical Field
This invention relates to products resulting from fermentation of poultry manure and having practical utility as organic fertilizers and soil conditioners. Further, the invention relates to a process for producing such a fermentation product.
2. Prior Art
As a result of a recent expansion of the poultry industry, great concern has been directed toward a quantitative increase in manure or dung. This poultry manure exhales malodor and tends to cause environmental pollution. The offensive odor peculiar to the manure is known to be attributable to organic matter present in the feed wasted as indigested from hens and chicks.
Attempts have been made to deodorize poultry manure as disclosed for instance in Japanese Patent Publication No. 55-3006. This prior method involves treating a poultry manure material with synthetic wollantonite and concentrated sulfuric acid and drying the thus treated manure in a speedy manner. Though acceptable in the efficiency of deordorization, such method fails to fully decompose the feed remaining as indigestive in the manure. This means that the manure thus treated will be made inadequate or ineffective for purposes of fertilization.
In addition to the above problem in poultry farming, a similar problem has been aroused by the disposal of serums in the territories where natural rubber is produced. Such a serum is byproduced upon coagulation and removal of rubber components from a natural rubber latex. Contained in the byproduct are non-rubber components such as proteins, saccharides and the like. The serum is rather decomposable and unpleasantly odorous due to those non-rubber components and hence environmentally pollutional.