高温热水解对高含固污泥中磷的形态转化影响

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Abstract

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.

Key words： high temperature thermal hydrolysis process (HTTHP) phosphorus forms high-solid sewage sludge inorganic phosphorus (IP) total phosphorus (TP)

Received: 11 September 2017

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	Articles by authors
	ZHOU Si-qi
	DAI Xiao-hu
	DAI Ling-ling
	PENG Xing-zi
	LIU Zhi-gang

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ZHOU Si-qi,DAI Xiao-hu,DAI Ling-ling等. Effects of high temperature thermal hydrolysis process on changes of phosphorus forms in high-solid sewage sludge[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(4): 1391-1396.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I4/1391

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