BIOLOGICAL TREATMEN DESCRIPTION

       DOCUMENT                 

ENERGY PLATFORM FOR TREATING THE ORGANIC FRACTION OF SOLID URBAN WASTE AND BIOMETHANE PRODUCTION

The first step in waste management is to stop calling it 'waste'

 Introduction

This document describes the general features of the most significant environmental components  located in the target area involved by  the request of the cogeneration plant construction and the environmental impacts associated with the work and tasks that one intends to carry out during the operational phases of the project. 

Please note that OFSUW  material is collected from separate waste collection (food waste).

This is food residue or food preparations and fractions that can be assimilated as food paper stained with food residuals.

OFSUW is 30% to 40% by weight of the solid waste. Separate collection of organic waste makes it possible to reduce emissions of greenhouse gases (such as methane) in landfills and limit the formation of leachate in landfills.

The leachate is rich with pathogenic microorganisms and may also pollute groundwater

The processing steps of the plant and its emissions

Environmental  impact means all the effects caused by an event, an action or a behaviour on the environment as as a whole. It isn’t necessarily negative, it’s any effects caused by an action performed on the environment. Our project will be fulfilled according to careful forward looking evaluations in terms of impacts. As a matter of fact we are aware about the anaerobics processes taking place in the digestor and those coming from their use in agriculture.

Below we list in a schematic way  the plant operation system and the main steps

In addition to the Biogas-Biomethane, anaerobic digestion process produces the digestate as final residue made of of a liquid and a solid fraction. This by-product can be used under certain conditions such as organic fertilizer to be deployed on the ground instead of chemical fertilizers.

The advantage of biomethane

There is a huge advantage thanks to the treatment of O.F.U.S.W. (organic fraction of URBAN SOLID WASTE), waste that is enhanced making it useful for producing Biomethane. This is a great alternative to landfilling which has unpredictable impacts of pollution, not knowing and not being able to control the reactions that take place between the different waste materials. When we talk about Biomethane, we mean the mixture of the above gas where there is a majority of methane gas, the latter properly treated can be introduced into the system or used as motor fuel.

This product  can enter the gas network to be used by normal users of natural gas on the network, or, biomethane can be used directly for automotive use, in particular, can also be used in Diesel-fueled trucks normally, by the provision of appropriate conversion kit, or in the media at this time already in production with natural gas. This solution can also be applied in various means for collecting garbage, and possibly other public transport, resulting in fact immediately an additional environmental improvement through the exploitation of waste, generating a virtuous cycle

Summarizing, the real advantages of biomethane are:

1 Treatment of BIOWASTE and its enhancement

2 Control and monitoring of pollution

3 Production of Biomethane which can power public means of transport

                                                                USING BIOMETHANE

 

The biomethane produced can be used by normal power plants with natural gas on the market, so there is a very wide range of potential users, but only the site design choices according to the environment in which the system is built will identify the actual users.

 

 Biomethane (APPLICATIONS)

 

• introduction into natural gas transmission and distribution networks;

• in high efficiency cogeneration plants;

• in CNG distribution systems.

 

The choice of Biomethane use systems involves a thorough check of the environment and/or the context in which you go to sell, and consequently the various financial returns.

From an initial examination of various opportunities, entering into CNG distribution systems is a more simple application and responds instantly to any requirements of the context. In particular, at the site where the waste treatment plant is located, you can give instant answers to the improvement of environmental quality including the transformation of diesel-powered vehicles currently circulating vehicles with CNG or bifuel power such as the vehicles for collecting garbage, including waste compactors, public buses and more.

 

That choice involves the creation of a natural gas distribution system that can fuel, beyond the above means, all private cars like any other natural gas distribution system.

Example of 18-wheeler powered by LNG                      

                                                                                             THE SEAWEEDS BIOFILTER  

 

The  carbon dioxide production obtained in the process of anaerobic digestion and separated through Biogas purification  into Biomethane, is not entered directly into the room, but it takes the opportunity to take part through using a bio-filter with micro-algae.

These algae capture carbon dioxide and convert it into oxygen and organic elements suitable for multiple uses.

MICRO-SEAWEEDS

Micro-seaweeds are photosynthetic microorganisms which can transform greenhouse gas emissions in nutrients. Light, carbon dioxide and nutrients are required for their growth. These raw materials   are able to synthesize a variety of compounds which are appliable in many fiels. Depending on the species cultivated it is possible to produce highly protein supplements, bioplastics, essential fatty acids (Omega-3), cosmetics, pigments and finally biofuels.

Micro-seaweeds

                                                                                          TREATMENT of DIGESTATE

TRANSFORMATION into quality COMPOST 

 

The digestate from anaerobic treatment is mixed with the structuring material and pruning cuttings obtained from  mowing and pruning and  has to undergo  a mixed bacterial composting treatment and by decomposing organisms. This process leads to a complete breakdown of the material and its enrichment in nitrate, phosphate, and potassium.

Composting solution allows you to get a high quality agronomic and fito suppressive compost starting from digestate as the basic material. The process takes place through an aerobic fermentation, completely controlled and confined in a technical room with special ventilation systems and air ducting; the building is an integral part and plant technological heaps of biomass are moved cyclically by special equipment and ventilated in order to maintain a ratio of air that passes through the material being worked on to better mass fermentation oxygenating stabilization while avoiding the production of odors.

Both the raw materials highly fermentable sugars and the masses being processed are always  kept inside, closed and slightly depressed buildings. The air comes out from the building only through conduct that leads to a biofilter , so  any impurities or residual organic matter are lost.

Even areas of unloading and storing materials are located inside the plant, so outside there isn’t  any kind of biological material not stabilized, thus avoiding any unpleasant odors, insects and animals .

The technology applied, either handling or management of moisture and oxygen content of the masses, allows no smelly molecules and in any case all the exhausted air will flow through the biofilter.

The material now stabilized should be stored outside for a period of 30-90 days, such material now free of odor and fully stabilized can be spread on fields as fito suppressive natural fertilizer of the highest quality, or marketed both in bulk or packaged in various ways.

quality COMPOST

 ENERGY PLATFORM FOR TREATING THE ORGANIC FRACTION OF          SOLID URBAN WASTE AND BIOMETHANE PRODUCTION

                               

New sati engineering srl         piazzale G. Giolitti 11    C.A.P. 47122  Forlì  (FC)         P.I. 04458610401

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