壬基酚和双酚A高效降解菌菌剂添加对污泥堆肥过程的影响

为探究降解菌对堆体内壬基酚(Nonylphenol,NP)和双酚A(Bisphenol A,BPA)的降解效率,以实验室前期筛选的高效降解菌N-1,B-1为菌剂,接种量为2%,向NP,BPA初始质量浓度分别为3. 59,3. 98mg/kg的污泥物料中添加不同剂量(15 mg/kg和30 mg/kg)的NP和BPA,在0. 5 L反应器内进行好氧堆肥试验。结果显示,堆肥7 d,堆体温度及p H值达到最大。与对照组(未添加菌剂)相比,添加N-1菌剂分别使堆体最高温度升高4. 6℃,2. 5℃;添加B-1菌剂分别使堆体温度升高2. 0℃,3. 4℃。与对照处理相比,添加N-1和B-1菌剂可显著提高NP和BPA在堆肥初期的降解速率,缩短其在堆肥中的半衰期,N-1,B-1菌剂可高效降解堆肥前期的NP和BPA。堆肥结束后,堆体中NP和BPA去除率高达95%。

Effect of Addition with High-Effective Strain of Nonylphenol and Bisphenol A on Composting Process of Sewage Sludge

In order to investigate the degradation efficiency of NP and BPA when adding the high-effect strain in the reactor,the N-1 and B-1 are screened by the laboratory,used as the composting agent,and added to the 0.5 L compost reactor with 2%inoculation amount.Different doses of NP and BPA(15 mg/kg and 30 mg/kg)are added into the sludge material where the initial concentration of NP and BPA is 3.59 and 3.98 mg/kg respectively.The results show that the highest temperature and pH of compost reaches the maximized after 7 days.When compared with the control treatment(none bacteria),the maximum temperature of the reactor has increased 4.6℃and 2.5℃adding N-1 strain.,and increased 2.0℃and 3.4℃adding B-1 strain.However,the addition of high-efficiency strain can significantly increase the degradation rate of BPA and NP when degraded by N-1 and B-1 strain at early stage of compost,the half-life of BPA and NP in composting can also be shortened and so NP and BPA at early stage of compost can be highly degraded by N-1 and B-1 strain.The final removal rate of NP and BPA can reach 95%in the experimental group after composting.