Pretreatment method for increasing yield of excess sludge anaerobic digestion methane

Pretreatment method for increasing yield of excess sludge anaerobic digestion methane

  • CN 105,254,150 A
  • Filed: 10/28/2015
  • Published: 01/20/2016
  • Est. Priority Date: 10/28/2015
  • Status: Active Application
First Claim
Patent Images

1. one kind is improved the pretreatment process of excess sludge anaerobic digestion methane production, it is characterized in that:

  • first the excess sludge in secondary sedimentation tank of sewage treatment work is concentrated into volatile suspended solid concentration VSS=8g/L-9.5g/L, then, calcium peroxide is added wherein and mix, calcium peroxide dosage is the 5%-20% of volatile suspended solid quality in residual active sludge, then microwave treatment, the process conditions of microwave treatment is;

    microwave irradiation power is 160-480W, microwave irradiation time is 2-6min, it is 30-40 DEG C that mud after process is positioned over temperature, stirring velocity is carry out anaerobically fermenting in the anaerobic fermentation tank of 100-200rpm, fermentation number of days is about 16d, collect gas and measure the content of wherein methane,Above-mentioned calcium peroxide is commercially available analytical pure calcium peroxide.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×