Iron-carbon micro-electrolysis coupled anaerobic reactor for treating polyvinyl alcohol desizing wastewater

The invention discloses an iron-carbon micro-electrolysis coupled anaerobic reactor for treating polyvinyl alcohol desizing wastewater. The reactor is characterized by comprising a water distributionmixing area, a first reaction zone, an iron-carbon micro-electrolysis reaction zone, an iron-carbon micro-electrolysis buffer zone, a primary gas gathering zone, a second reaction zone, a secondary gas gathering zone, a precipitation zone and a water outlet zone which are sequentially connected from bottom to top; anaerobic granular sludge is inoculated into the first reaction zone and the secondreaction zone; the primary gas gathering zone and the secondary gas gathering zone are internally provided with a primary three-phase separator and a secondary three-phase separator respectively. Thereactor is simple in structure, convenient to operate, small in occupied area and high in treatment efficiency and reaction rate, generates biogas energy and especially has the unique advantages in the aspects of treating the h