The invention concerns a method of biogas production in an anaerobic biological wastewater treatment plant, and a reactor (1) for biogas production and wastewater treatment. The invention can be applied as a compact, medium-loaded treatment system, which combines biological degradation with a separation process, wherein the separation concerns fractions of heavy substrates taking part in the reaction. In particular, the substrate that is dosed in the reaction is the stillage leachate remaining after decantation. It is preferable for the invention to have a further possibility to generate energy from the biogas, mostly from methane, which is a main component of biogas produced with the invention, and the possibility to significantly utilize the harmful substances in the process according to the invention.;The reactor (1) for biogas production and wastewater treatment includes two tanks (3) interconnected with transmission pipelines (2), the first of which is the buffer tank (3') and the second is the main tank (3"), where both tanks are provided with a temperature sensor (4), pH sensor (5) and pressure sensor (6). The tanks (3) are equipped with mixing modules (7) that include a rotor (8). The biogas outlet (23) is located at the top of each tank (3', 3"). The flow of agents through the tanks (3) and transmission pipelines (2) is controlled by a control system (9), based on the readouts of sensors (4, 5, 6). The mixing modules (7) are located outside the tanks (3) and are each time connected to the tanks (3) with their own pipeline circuit system (10), which has a turbulent circulation pump (11), and the main tank (3") is additionally connected to a membrane filter system (14) through an external turbulent pipeline circuit (13) forced by the second pump (12). The membrane filter system (14) is connected by its outlet to the core (15) running centrally through the main tank (3"), generally at half height of the core (15), which core (15) is opened on top to obtain overflow into the main tank (3"), and at the bottom it is terminated with an outlet (16) for concentrated sludge. The membrane filter system (14) has its own outlet (17) for filtrate in the form of treated leachate.
展开▼
