Moreover, 875 cm−1 for –CO3 2− vibration in carbonates occurred in the substrates after SSF of reactor T2, T4, T5 and T6, and 470 cm−1 for Si–O stretch in silicates and silica occurred in the substrates after SSF ofthese four reactors;the absorption peak strength of –CO3 2− and Si–O bond stretching vibration for these four reactors ranked in the order of T4 > T2 > T5 ≈ T6 (Fig. 6);the results were in agreement with the organic biodegradation efficiencies for the four reactors.