工业水处理 ›› 2023, Vol. 43 ›› Issue (11): 181-188. doi: 10.19965/j.cnki.iwt.2022-1164

• 试验研究 • 上一篇    下一篇

超声联合生物酶强化剩余污泥厌氧产酸性能研究

赵瑜涵1(), 王昊龙2, 周立山1,2(), 韩恩山1, 孙建阳2, 刘丽强2   

  1. 1. 河北工业大学化工学院,天津 300401
    2. 中海油天津化工研究设计院有限公司,天津 300131
  • 收稿日期:2023-08-30 出版日期:2023-11-20 发布日期:2023-11-21
  • 作者简介:

    赵瑜涵(1998— ),硕士研究生。E-mail:

    周立山,教授级高工。E-mail:

  • 基金资助:
    海油发展重点科技攻关项目(HFKJ-ZDGG-TJY-2021-05)

Anaerobic acid production characteristics of excess sludge enhanced by ultrasound and biological enzymes

Yuhan ZHAO1(), Haolong WANG2, Lishan ZHOU1,2(), Enshan HAN1, Jianyang SUN2, Liqiang LIU2   

  1. 1. School of Chemical Engineering, Hebei University of Technology, Tianjin 300401, China
    2. CenerTech Tianjin Chemical Research and Design Institute Co. , Ltd. , Tianjin 300131, China
  • Received:2023-08-30 Online:2023-11-20 Published:2023-11-21

摘要:

采用超声和生物酶联用技术处理剩余污泥以促进污泥厌氧发酵产酸,实现污泥资源化。首先,以天津市某污水处理厂二沉池剩余污泥为处理对象,采用单因素实验考察了超声预处理过程中处理时间、超声频率、超声振幅对剩余污泥溶出SCOD的影响,结果表明,超声预处理剩余污泥的最佳处理条件为处理时间5 min、超声频率20 kHz、振幅80%,此条件下,污泥溶出SCOD为407.5 mg/L。之后向经超声处理后的剩余污泥中分别投加污泥质量5%的α-淀粉酶、纤维素酶、溶菌酶和复合酶进行厌氧发酵,以探究生物酶对剩余污泥厌氧消化的影响,结果表明,在温度35 ℃下,复合酶对于污泥厌氧发酵产酸效果最好,污泥溶出SCOD在第2天增加2 384.9 mg/L,在第4天产酸量达到最大值1 465.8 mg/L,其中乙酸量为1 058.6 mg/L,丙酸量为136.0 mg/L。溶菌酶效果优于其他单酶,SCOD第2天增幅达1 840 mg/L,在第4天产酸量达1 240.4 mg/L,其中乙酸量为406.4 mg/L,丙酸量为524.3 mg/L。

关键词: 剩余污泥, 超声, 生物酶, 挥发性脂肪酸, 厌氧消化

Abstract:

The combination of ultrasound and biological enzyme technology was used to treat excess sludge to promote anaerobic fermentation and acid production,so as to achieve sludge resource utilization. Firstly,a single factor experiment was conducted to investigate the effects of treatment time,ultrasonic frequency,and ultrasonic amplitude on the dissolution of SCOD from the excess sludeg in secondary sedimentation tank of a sewage treatment plant in Tianjin. The results showed that the optimal treatment conditions for ultrasonic pretreatment of excess sludge were 5 minutes of treatment time,20 kHz of ultrasonic frequency and 80% of amplitude. Under these conditions,the dissolution of SCOD from sludge reached 407.5 mg/L. Afterwards,α-amylase,cellulase,lysozyme,and composite enzymes were added to the sludge after ultrasonic treatment,which account for 5% of the sludge,so as to investigate the effect of biological enzymes on anaerobic digestion of excess sludge. The results showed that the composite enzyme had the best effect on anaerobic fermentation of sludge at a temperature of 35 ℃. The SCOD of sludge increased by 2 384.9 mg/L on the second day,and the maximum acid production reached 1 465.8 mg/L on the fourth day,with 1 058.6 mg/L acetic acid and 136.0 mg/L propionic acid. The effect of lysozyme was superior to other single enzymes,with a SCOD increase of 1 840 mg/L on the second day and an acid production of 1 240.4 mg/L on the fourth day,including 406.4 mg/L acetic acid and 524.3 mg/L propionic acid.

Key words: excess sludge, ultrasound, biological enzymes, volatile fatty acids, anaerobic digestion

中图分类号: