| 摘要 |
<p>Present invention relates to a method for producing of biogas, which comprises the following steps: - lead a stream (1 ) of organic material containing nitrogen and/or phosphor to a mixing step (2), mix the stream (1) with water (3), recirculated solid matter (16) from a later step, and recirculated reject (17) from a later step. lead the mixture from step b. into a sludge digestion tank (5), regulate the temperature of the sludge digestion tank (5) with a temperature regulating circuit (4), remove biogas from the tank (5), remove digested material (7) from the tank (5) and lead this to a step (8), remove water, phosphor and ammonium in step (8) and produce a product (9) rich in ammonium and/or phosphor, remove dewatered sold matter (13), and recirculate all or parts of the reject (10) from step (8) to the mixing step (2) and/or another upstream process.</p> |
