Orthogonal experiment, single factor experiment (i.e. temperature), and standards, measurements, and testing (SMT) were used to explore changes of phosphorus forms in high-solid sewage sludge after high temperature thermal hydrolysis process (HTTHP). The experimental results showed that more than 14.80% of organic phosphorus (OP) was transformed into inorganic phosphorus (IP) in high-solid sewage sludge by the HTTHP at 120℃~160℃, and the order of influencing factors on IP/total phosphorus (TP) was as follows:temperature of HTTHP > time of HTTHP > oxidant content > pH. With the increase of temperature, IP/TP in high-solid sewage sludge increased from 79.13% to 95.87%. Further study indicated that under 160℃ and 40min of HTTHP conditions, the IP and the IP/TP increased respectively from 18.30mg/g to 20.49mg/g and 80.83% to 96.97%. These findings, however, established foundation to realize the phosphorus recovery, and also provided an important reference for the optimization of high-solid anaerobic digestion of sewage sludge with HTTHP pretreatment.
周思琦, 戴晓虎, 戴翎翎, 彭信子, 刘志刚. 高温热水解对高含固污泥中磷的形态转化影响[J]. 中国环境科学, 2018, 38(4): 1391-1396.
ZHOU Si-qi, DAI Xiao-hu, DAI Ling-ling, PENG Xing-zi, LIU Zhi-gang. Effects of high temperature thermal hydrolysis process on changes of phosphorus forms in high-solid sewage sludge. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(4): 1391-1396.
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