(best examples and good practices) on household organic waste ...

(best examples and good practices) on household organic waste ... (best examples and good practices) on household organic waste ...

11.11.2014 Views

127 H 2 O ong>andong> a temperature drum inlet range of: 200-650 0 Celsius. (Vong>andong>enbroek International., 2010) 7.3.6. The Rennerod plant, Germany The delivery area of the Rennerod plant (Picture 33.) is divided into a deep bunker for household waste ong>andong> a flat bunker for commercial wastes. Thus, an initial pre-sorting into fractions to be treated mechanically ong>andong>/or biomechanically as well as a sorting out of the contaminants can take place in the latter using a wheel loader. During delivery the quantity ong>andong> position of the waste is automatically transmitted to the crane system to feed the bunker. Picture 33.: The Rennerod plant in Germany (Wastesum projectDel 3A., 2010) An automated delivery crane (Picture 34.) removes the residual waste from the deep bunker ong>andong> feeds the downstream shredder. After the initial separation of ferrous metals, the residual shredded waste is passed via a conveyor belt system to a buffer bunker. At the same time, it is the interface or the hong>andong>over point with the second process crane. The second process crane lifts the lids of the composting boxes ong>andong> places them on a neighboring box. Then it fills the opened composting box with the shredded residual waste, re-lifts the box cover ong>andong> sets it precisely on the filled box by means of a guide rail system. The Rennerod plant consists of 7 1/2 boxes.

128 Picture 34.: Delivery crane in Rennerod plant in Germany (Wastesum project Del 3A. ,2010) Then the aerobic decomposition takes place in the closed, air ong>andong> liquid boxes (made of thermally insulated reinforced concrete) for 6 days. Moreover, it has to be mentioned that the residual waste is also sanitized during this time. As the air supply is adjusted to suit the biological needs of the decomposing microorganisms, the easily degradable organic substance is microbiologically converted in a very short time. The heat produced during this process is used to remove the moisture (condensate) ong>andong> thus for drying the residual waste. The drying of the waste is the prerequisite for a separation of the waste mixture into clean fractions of its recyclables like metals/ inert materials/ glass ong>andong> energetically usable SRF components. Condensate is separated out of the moist waste air via a heat exchanger system, which is then fed into a water treatment plant. Following the completion of the drying stage, the composting boxes are emptied using the automated process crane analogue to the waste delivery. A condensate treatment (Picture 35.) is integrated in the Rennerod plant. The moisture contained in the waste is removed from the waste air in the cycle via a heat exchanger system. The condensate separated out is fed into a 2-stage cleaning plant, consisting of a high-performance biological stage ong>andong> a downstream ultra filtration stage. Following this treatment process, the cleaned condensate (permeate) is fed into the cooling circuit of the system as service water ong>andong> evaporates via an open evaporative cooler. In this way, the plant can operate without producing wastewater.

127<br />

H 2 O <str<strong>on</strong>g>and</str<strong>on</strong>g> a temperature drum inlet range of: 200-650 0 Celsius. (V<str<strong>on</strong>g>and</str<strong>on</strong>g>enbroek<br />

Internati<strong>on</strong>al., 2010)<br />

7.3.6. The Rennerod plant, Germany<br />

The delivery area of the Rennerod plant (Picture 33.) is divided into a deep<br />

bunker for <strong>household</strong> <strong>waste</strong> <str<strong>on</strong>g>and</str<strong>on</strong>g> a flat bunker for commercial <strong>waste</strong>s. Thus, an<br />

initial pre-sorting into fracti<strong>on</strong>s to be treated mechanically <str<strong>on</strong>g>and</str<strong>on</strong>g>/or biomechanically<br />

as well as a sorting out of the c<strong>on</strong>taminants can take place in the<br />

latter using a wheel loader. During delivery the quantity <str<strong>on</strong>g>and</str<strong>on</strong>g> positi<strong>on</strong> of the<br />

<strong>waste</strong> is automatically transmitted to the crane system to feed the bunker.<br />

Picture 33.: The Rennerod plant in Germany<br />

(Wastesum projectDel 3A., 2010)<br />

An automated delivery crane (Picture 34.) removes the residual <strong>waste</strong> from the<br />

deep bunker <str<strong>on</strong>g>and</str<strong>on</strong>g> feeds the downstream shredder. After the initial separati<strong>on</strong> of<br />

ferrous metals, the residual shredded <strong>waste</strong> is passed via a c<strong>on</strong>veyor belt system<br />

to a buffer bunker. At the same time, it is the interface or the h<str<strong>on</strong>g>and</str<strong>on</strong>g>over point<br />

with the sec<strong>on</strong>d process crane. The sec<strong>on</strong>d process crane lifts the lids of the<br />

composting boxes <str<strong>on</strong>g>and</str<strong>on</strong>g> places them <strong>on</strong> a neighboring box. Then it fills the<br />

opened composting box with the shredded residual <strong>waste</strong>, re-lifts the box cover<br />

<str<strong>on</strong>g>and</str<strong>on</strong>g> sets it precisely <strong>on</strong> the filled box by means of a guide rail system. The<br />

Rennerod plant c<strong>on</strong>sists of 7 1/2 boxes.

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