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Ben Williams

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Evaluation of Zeolite as a Binding Agent to Mitigate Ammonia Loss From Pig Slurry and Manure

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Research partner: Cranfield University

Sponsor: AHDB Pork

Duration: 2009

 

Aims and objectives

  • To evaluate the efficiency of using zeolite as a binding agent to reduce NHvolatilisation from pig slurry and manure
  • To determine the efficacy of zeolite as an adsorbent for copper and zinc present in pig slurry and manure
  • To determine the influence of zeolite on urease activity in soil and pig manure

Findings to date

  • The addition of zeolite to manure and slurry reduced NH3 emission, but greater reduction was achieved when it was mixed with soil
  • A higher dose of added zeolite did not increase adsorption of NH4
  • Zeolite was not very effective in adsorbing zinc in manure and slurry but copper was reduced significantly (from 58 to 38 mg/kg Cu) in manure
  • Urease activity is greater in manure (1600-2000 µmol/g) than in soil (10-50 µmol/g) which helps to hydrolyse urea to form ammonium. 

Further information

Full report