Investigation of the accumulation of ash, heavy metals, and polycyclic aromatic hydrocarbons to assess the stability of lysis-cryptic growth sludge reduction in sequencing batch reactor.

The accumulation of ash, heavy metals, and polycyclic aromatic hydrocarbons (collectively called potential accumulating substances, PAS) was evaluated to ascertain the stability of lysis-cryptic growth sludge reduction process (LSRP) for municipal sludge treatment. One sequencing batch reactor (SBR) incorporated with homogenization was run to test the LSRP and another SBR as a control. The continuous monitoring results for 2 months showed that the ash and heavy metals slightly increased, and the polycyclic aromatic hydrocarbons decreased by 18.

Reduction of excess sludge production in sequencing batch reactor (SBR) by lysis-cryptic growth using homogenization disruption.

A lysis-cryptic growth system, which combined high-pressure-homogenization (HPH) for sludge disruption, was proposed to reduce excess sludge production in SBR. Experimental data was analyzed with the aid of response surface models to determine the optimal HPH disruption pressure, which was 70 MPa. By combining a 5.