水解溶菌酶污泥减量过程中的污泥特性

利用水解溶菌酶对从SBR系统中取出的部分污泥进行水解,然后再回流到SBR系统中,通过与未加水解溶菌酶的相同系统对比,研究了水解溶菌酶对SBR系统中污泥减量与污泥特性等方面的影响.结果表明,在连续50d的运行期间,水解溶菌酶作用下的SBR系统中剩余污泥减量总计达到76.29%,而该系统对COD与氨氮的降解效率与未加酶系统基本持平,分别为88.21%与68.72%,但其TP平均去除率较未加酶系统降低了17.2%;系统中由于水解溶菌酶的添加,污泥的微生物活性得到强化,比氧气吸收速率平均提高35%,ATP的平均值比对比系统提高了3.12nmol/mgMLSS.

Characterization of activated sludge in a sludge reduction process using lysozyme

Partial residual sludge from a sequential batch reactor(SBR),after mixed with lysozyme,was fed back to the SBR.The effects of the lysozyme on sludge reduction and sludge characteristics in the SBR system were evaluated through the comparative observation of the sludge in a reference SBR without lysozyme addition.Experimental results showed that the lysozyme could effectively reduce the production of excess sludge by 76.29% in the test SBR system during 50 days operation.The average removal efficiency of chemical oxygen demand and ammonia-N in the SBR with lysozyme addition was almost the same as that in the reference system,which were 88.12% and 69.05% respectively,but the average TP removal decreased by 17.2% in the lysozyme added system comparing with the reference one.It was further found that after treated with lysozyme,microbial activity of the sludge was enhanced,the specific oxygen uptake rate(SOUR) was elevated by 35%,and the average ATP value was improved by 3.12nmol/mgMLSS comparing with that of the reference system.