Waste-to-Energy: Anaerobic Treatment Plant in Padova, Italy

Anaerobic Treatment Plant
City: Padova
Country: Italy
Solution Type: Waste-to-Energy
Technology Used: Anaerobic Treatment Plant
Client: Guzzo

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Background

Guzzo has a beef cattle breeding farm and with more than 50 years of experience, Guzzo is one of the leading companies in Padua’s agricultural sector. The company has 2,280 heads of cattle in grilled floor stables and 720 heads of cattle in straw litter stables. The quantity of sludge and manure allowed to produce the following amounts of biogas, and then, electric and thermal power have been calculated based on the aforementioned number of heads:

Quantity

(ton/y)

Methane production

(Nm3/y)

Biogas production

(Nm3/y)

Electric power (kWh)

Thermal power (kWh)

Manure

6.336

342.144

551.845

146

164

Sludge

18.810

332.561

536.388

142

159

Tot.

25.146

674.705

1.088.234

288

323

Following the new trend in Italy and in other European countries of the growth in the biogas market, Guzzo wants to utilize this unexploited potential resource. In fact, many European countries have established favorable conditions for electricity production from biogas through a pricing tariff system. This system rewards biogas production from animal sludge, manure and agricultural by-products, as opposed to the other available primary sources (i.e. energetic crops).

Challenges And Solutions

Waste-to-Energy Padova, ItalyGuzzo wanted to minimize the costs of disposal and obtain a considerable economic incentive via transforming accumulating liquid and solid manure into electrical and thermal energy. RWL Water proposed an anaerobic treatment plant specially designed and optimized for livestock farming, generating biogas through a cogeneration system.

The plant, simple and compact with efficient and focused technology, is made with the following technical parts:

  • Mixing and shredding tan
  • Anaerobic digester: where the anaerobic fermentation takes place and the biogas is produced and stored in the gasometrical dome, with one chamber and two diaphragms connected and sealed on top of the digester
  • Cogeneration Engine Unit (CHP)
  • Digestate storage tank
  • Screw separator
  • Torch

In order to utilize the full potential of the cogeneration system, the customer added 1.6 ton/day of corn meal, reaching an electric power of 360 kWh. This supplement doesn’t compromise the plant efficiency; thanks to its versatility and its technologically advanced equipment. The plant can work with a co-digestion system.

CUSTOMER:  Azienda Agricola Guzzo – Padova, Italy- 2012
PROJECT DATA:
Flow rate: 70 mc/d
Methane production: 2,300 Nm3/day
Energy production: 360 kWh
Thermal energy (hot water): 405 kWh