微波、葡萄糖以及水解尿液对污泥中磷释放及回收的影响

doi:10.7523/j.issn.2095-6134.2020.06.004

中国科学院大学学报 ›› 2020, Vol. 37 ›› Issue (6): 744-749.DOI: 10.7523/j.issn.2095-6134.2020.06.004

微波、葡萄糖以及水解尿液对污泥中磷释放及回收的影响

温国期^1,2,3, 张向茹¹, 黄丽娟¹, 胡正义¹

1. 中国科学院大学资源与环境学院, 北京 100049;
2. 拉瓦尔大学土壤与农业食品工程学院, 魁北克拉瓦尔 G1V 0A6;
3. 加拿大农业与农业食品部魁北克研究与发展中心, 魁北克拉瓦尔 G1V 2J3

收稿日期:2019-03-13 修回日期:2019-06-04 发布日期:2020-11-15
通讯作者: 胡正义
基金资助:
国家重点研发计划项目（2016YFD0800104）资助

Effects of microwave, glucose, and hydrolyzed urine on phosphorus release and recovery from sewage sludge

WEN Guoqi^1,2,3, ZHANG Xiangru¹, HUANG Lijuan¹, HU Zhengyi¹

1. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China;
2. Department of Soils and Agri-Food Engineering, Laval University, Laval Quebec G1V 0A6, Canada;
3. Quebec Research and Development Center, Agriculture and Agri-Food Canada, Laval Quebec, G1V 2J3, Canada

Received:2019-03-13 Revised:2019-06-04 Published:2020-11-15

摘要/Abstract

摘要： 回收污泥中的磷能缓解磷资源危机。鸟粪石法回收污泥中磷需要先对其进行活化。比较微波、葡萄糖和水解尿液对厌氧污泥中磷释放的影响，并验证鸟粪石法回收污泥上清液中磷的可行性。结果表明：微波、葡萄糖和尿液均能促进污泥中磷的释放，且污泥磷释放率为64.57%（微波）、66.93%（葡萄糖）、65.63%（0.2 L尿液）、68.78%（0.4 L尿液），显著大于对照处理的40.77%。尿液促进污泥磷释放的主要原因是水解尿液中高浓度的游离态氨氮分解聚磷菌细胞，促使无机磷释放。将氯化镁加入到尿液活化污泥获得的上清液中，可得到高质量的鸟粪石沉淀，实现污泥磷回收。

关键词: 尿液, 游离态氨氮, 污泥, 微波, 鸟粪石

Abstract: Recovery of phosphorus from sewage sludge alleviates the phosphorus crisis. The sludge phosphorus requires to be activated before it is recovered through struvite method. We investigate the effects of microwave, glucose, and hydrolyzed urine on phosphorus release from anaerobic sludge, and also evaluate the feasibility of recovering phosphorus from sludge supernatant through struvite method. Results show that microwave, glucose, and urine promote the phosphorus release from sludge. The phosphorus release rates are 64.57%, 66.93%, 65.63%, and 68.78% for microwave, glucose, 0.2 L urine, and 0.4 L urine, respectively, which are significantly higher than the rate of 40.77% under control treatment. Hydrolyzed urine promotes phosphorus release from sludge mainly because its high concentration of free ammonia nitrogen disintegrates the cells of polyphosphate-accumulating organisms and then accelerates the inside-body inorganic phosphorus release. High-quality struvite precipitation is obtained while magnesium chloride is added into the urine-activated sludge supernatant. The method expressed in this study can be used to well realize the phosphorus recovery from sludge.

Key words: human urine, free ammonium, sludge, microwave, struvite

中图分类号:

X703

温国期, 张向茹, 黄丽娟, 胡正义. 微波、葡萄糖以及水解尿液对污泥中磷释放及回收的影响[J]. 中国科学院大学学报, 2020, 37(6): 744-749.

WEN Guoqi, ZHANG Xiangru, HUANG Lijuan, HU Zhengyi. Effects of microwave, glucose, and hydrolyzed urine on phosphorus release and recovery from sewage sludge[J]. , 2020, 37(6): 744-749.

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微波、葡萄糖以及水解尿液对污泥中磷释放及回收的影响

Effects of microwave, glucose, and hydrolyzed urine on phosphorus release and recovery from sewage sludge

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