298 94 307/02 Untersuchungen zum Stand der Umsetzung des ...
298 94 307/02 Untersuchungen zum Stand der Umsetzung des ... 298 94 307/02 Untersuchungen zum Stand der Umsetzung des ...
Teil 3 Seite 10-11 that is formed during the dehydration of fermenter outflow, as well as the elementary sul- phur that is formed during de-sulphurisation are channelled into thermal conver- sion/disposal. The stripped ammonia is subsequently catalytically oxidised into nitrogen. Through the discharge of the ammonia stripper, the volume of water to be transported outwards is significantly lower compared to animal meal production. Operational data Applicability Example for the results of the biogasproduction with matrial out of the Highpressuretem- peraturehydrolysis COD value load COD reduc- tion COD filtrated reduction Methane content in the bio gas [kg/m³*d] [%] [%] [%] [m³/Mg] Biogas recovery ~ 10 80 - 90 85 - 93 70 - 77 ~ 200 - 300 Economics One tonne of raw material from the animal carcass processing sector yields between 200 and 300 m³ of biogas with an average methane content of above 70%. At an electrical efficiency rate of 38%, 610 to 780 kWh/t of electrical energy are produced. If the electricity is fed into the network in accordance with the Renewable Energy Law, the return is € 0,06 to 0,1 per kWh. This works out to € 36,6 to 78 per tonne. The costs for a currently required production of animal meal, including the high energy consumption involved in the drying of animal slurry and subsequent incineration can be saved. Only the considerably lower quantities of mechanically dehydrated fermentation remnant needs to be dried. A feasibil- ity study shows that, in comparison to animal meal production and subsequent incinera- tion, a cost advantage of approx. € 50 can be attained in terms of thermal high pressure hydrolysis. The higher energy input during solubilisation has the consequence that the overall pro- teins and fats are solubilised for biogas conversion. Pre-acidification, which would other- wise take 15 days with this material, is therefore not required. In contrast to a conventional biogas plant, in which e.g. category 3 material can be co-fermented in accordance with the EU ordinance, a time reduction of 40% is achieved for this process. Driving force for implementation Compared to conventional process preconditions for category 1 material (133°C, 3 bar and 20 min.) this results in the advantage that, per tonne of raw material, 600 kW is re- tained. It has been established that at conventional block type thermal power stations the ratio of electrical energy to heat is approximately 1:1. However, the heat resulting from this is known to be difficult to utilise. Example plants St. Erasmus animal carcass conversion plant (technical college plant with 1000 kg/h) Reference literature
10.2 Addition THH_HPTH Teil 3 Seite 10-12 This technic was only reminded of this procedure again within the course of the BSE cri- sis. Firstly because, as a result, it was possible to raise the extent of prions killed off, and secondly it was then possible to carry out an optimisation of the overall process, because of course no feeds were being produced any longer. Only as a result of this was there any debate about intermediate energy extraction via biogas and the subsequent incineration of products. In principle, the process forms a unit, after completion of which all products are incinerated completely (and is therefore not comparable to an agricultural biogas plant, as I already outlined in my initial e-mail). The higher energy input during solubilisation has the consequence that the overall pro- teins and fats are solubilised for biogas conversion. Pre-acidification, which would other- wise take 15 days with this material, is therefore not required. In contrast to a conventional biogas plant, in which e.g. category 3 material can be co-fermented in accordance with the EU ordinance, a time reduction of 40% is achieved for this process. Through the more radical preconditions, it is further possible to achieve conversion of up to 95% of the organic material, which is therefore also 10% higher than at conventional 3 biogas plants. The biogas yield is increased by approx. 30% (200 m per tonne of educt). Compared to conventional process preconditions for category 1 material (133°C, 3 bar and 20 min.) this results in the advantage that, per tonne of raw material, 600 kW is re- tained. It has been established that at conventional block type thermal power stations the ratio of electrical energy to heat is approximately 1:1. However, the heat resulting from this is known to be difficult to utilise. Summary: * More favourable energy balance in comparison to the conventional process for category 1 material (gain: 600 kW/t of raw material). * The time required for fermentation is approx. 40% lower than at conventional bio- gas plants (with comparable material). * 95% conversion of organic material (10% higher than at conventional plants). * Increase in biogas yield of 30% The higher killing-off rate of prions no longer plays a role since the products are inciner- ated.
- Seite 323 und 324: Teil 3 Seite 8-1 8 TECHNIQUES TO CO
- Seite 325 und 326: Reference literature Teil 3 Seite 8
- Seite 327 und 328: Teil 3 Seite 8-5 Corporate clarific
- Seite 329 und 330: Economics Driving force for impleme
- Seite 331 und 332: 8.1.9 Rubishes Teil 3 Seite 8-9 8.1
- Seite 333 und 334: Oberding animal carcass disposal pl
- Seite 335 und 336: Operational data Applicability Econ
- Seite 337 und 338: Teil 3 Seite 8-15 Corporate clarifi
- Seite 339 und 340: Driving force for implementation Ex
- Seite 341 und 342: Continuous sterilisation Teil 3 Sei
- Seite 343 und 344: Teil 3 Seite 8-21 through a system
- Seite 345 und 346: Cross media effects Operational dat
- Seite 347 und 348: Teil 3 Seite 8-25 The energy requir
- Seite 349 und 350: Teil 3 Seite 8-27 For the wastewate
- Seite 351 und 352: Teil 3 Seite 8-29 Corporate clarifi
- Seite 353 und 354: Driving force for implementation Ex
- Seite 355 und 356: Teil 3 Seite 8-33 Table 8-3: Perfor
- Seite 357 und 358: Teil 3 Seite 8-35 one often tries t
- Seite 359 und 360: Teil 3 Seite 8-37 storage rooms and
- Seite 361 und 362: Teil 3 Seite 8-39 Rethmann TBA Gent
- Seite 363 und 364: Teil 3 Seite 9-1 9 BEST AVAILABLE T
- Seite 365 und 366: Teil 3 Seite 10-2 costs for the coo
- Seite 367 und 368: Investition Re-Invest © 150 TDM 50
- Seite 369 und 370: Teil 3 Seite 10-6 combustion chambe
- Seite 371 und 372: Teil 3 Seite 10-8 Table 10-1: Exhau
- Seite 373: Teil 3 Seite 10-10 largely converte
- Seite 377 und 378: Teil 4: Zusammenstellung der durch
10.2 Addition THH_HPTH<br />
Teil 3 Seite 10-12<br />
This technic was only reminded of this procedure again within the course of the BSE cri-<br />
sis. Firstly because, as a result, it was possible to raise the extent of prions killed off, and<br />
secondly it was then possible to carry out an optimisation of the overall process, because<br />
of course no feeds were being produced any longer.<br />
Only as a result of this was there any debate about intermediate energy extraction via<br />
biogas and the subsequent incineration of products. In principle, the process forms a unit,<br />
after completion of which all products are incinerated completely (and is therefore not<br />
comparable to an agricultural biogas plant, as I already outlined in my initial e-mail).<br />
The higher energy input during solubilisation has the consequence that the overall pro-<br />
teins and fats are solubilised for biogas conversion. Pre-acidification, which would other-<br />
wise take 15 days with this material, is therefore not required. In contrast to a conventional<br />
biogas plant, in which e.g. category 3 material can be co-fermented in accordance with<br />
the EU ordinance, a time reduction of 40% is achieved for this process.<br />
Through the more radical preconditions, it is further possible to achieve conversion of up<br />
to 95% of the organic material, which is therefore also 10% higher than at conventional<br />
3<br />
biogas plants. The biogas yield is increased by approx. 30% (200 m per tonne of educt).<br />
Compared to conventional process preconditions for category 1 material (133°C, 3 bar<br />
and 20 min.) this results in the advantage that, per tonne of raw material, 600 kW is re-<br />
tained. It has been established that at conventional block type thermal power stations the<br />
ratio of electrical energy to heat is approximately 1:1. However, the heat resulting from<br />
this is known to be difficult to utilise.<br />
Summary:<br />
* More favourable energy balance in comparison to the conventional process for<br />
category 1 material (gain: 600 kW/t of raw material).<br />
* The time required for fermentation is approx. 40% lower than at conventional bio-<br />
gas plants (with comparable material).<br />
* 95% conversion of organic material (10% higher than at conventional plants).<br />
* Increase in biogas yield of 30%<br />
The higher killing-off rate of prions no longer plays a role since the products are inciner-<br />
ated.
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