Sludge reduction induced by aquatic worms in SBR wastewater treatment system

摘要

Sludge reduction effects of the Sequencing Batch Reactor (SBR) with aquatic worms were studied. When the density of aquatic worms was 4800 mg/L, the average sludge yield of the SBR with aquatic worms was 0.17 g SS / g COD, reducing by 21.20% in comparison with that of SBR without aquatic worms. Furthermore, the values of SVI of worms-group were slightly lower than that of control. Therefore, inoculation of the aquatic worms in SBR can effectively reduce sludge and might have a contribution to improve sludge settling characteristics.