... biogas digester Use the waste to produce biogas for generating electricity,cooking,heating,etc. Easy to install I.The characterization ... Longitudinal≤8Transverse9Cold-resistance(-45°C)In good condition10Resistance to penetration (steel pricker:100g,H:1m)unpierced11Ageing- ... pond, meanwhile fractional biogas liquid return to Preparatory acidification pond to periodic duty. The remnant biogas dregs ...