|The treatment of organic wastes such as raw
garbages, organic sludges, livestock
etc. is one of the biggest issues all
the world. There are a variety of technologies
available for trying to solve the problems,
among which biological processes have
attracting attentions to their environmental
friendly and recycling aspects.
In Japan, currently available are two major biological process technologies using microbes for treating organic wastes: one is so called Compost Type which converts wastes into fertilizers or livestock feeds and the other Dissolution Type which decomposes wastes into carbonic acid gas and water with no by-product or residues remaining.
The Compost or Recycle Type is useful for wastes such as loss foods from food factories which are constantly uniform in quality and expected to make their by-product of equal quality all the time, enabling to find users of the by-product. However, if wastes are mixed with various materials such as raw garbages from restaurants, hotels, kitchens and others, it is not possible to have their by-product constant in quality and hence difficult to find its effective users. In either case, it takes time to get wastes completely fermented before the by-products can be effectively used. It also requires additional labors and places for processing. For these reasons, there are not many systems and units of the compost type successfully working in Japan although there are many suppliers and a variety of machines commercially available.
The dissolution type is preferred as it leaves no residues except water and carbonic acid gas, and is useful for the poor class of wastes, requiring no additional procedures afterward as well.
There are also many systems and equipment of the dissolution type now commercially available here. Most of them use respectively developed microbes and special biological intermedia suitable for those specific microbes to live in and work with. Some require specially treated and hence costly biological intermedia of huge amount for the wastes to be decomposed, and some even need periodical replacement of those costly materials. It is also required to use cultivated microbes of rather big amount, which are specified by respective system suppliers and are usually costly.
The Z-lant system does not use any specific and cultivated microbes. The key of this technology is to use wooden chips made of cedar, which are processed for microbes to comfortably live in as their good colonies. Any cedar tree felled down for thinning out can be used for the material of Z-lant. Microbes available naturally in local areas gather and grow by themselves in the cedar chip colonies provided.
Thus, there is no need of cultivating special microbes and paying for them.
There is no complicated mechanism in the system. No additives and chemicals are required. Consumption of the wooden chips is very few, making maintenance and its cost almost free.
The technology has proven to be effective with almost 100 installations in Japan and China.
The key technology to process wooden chips can be transferred for local processing with all essential and necessary information on the effective buildup of the system.