皮革科学与工程 ›› 2019, Vol. 29 ›› Issue (04): 5-9.doi: 10.19677/j.issn.1004-7964.2019.04.001

• 试验研究 •    下一篇

水解酶及硝化菌剂强化处理制革废水的研究

马宏瑞,王慧琴,朱超,周建军   

  1. 陕西科技大学环境科学与工程学院,陕西 西安 710021
  • 收稿日期:2019-03-04 出版日期:2019-08-28 上线日期:2019-09-09
  • 通讯作者: 马宏瑞
  • 作者简介:马宏瑞(1963-),男,博士,教授, mahrxingfeng@163.com,主要从事化工污染控制与资源化技术的研究。
  • 基金资助:
    国家水体污染控制与治理科技重大专项(2017ZX07602-001);陕西省教育厅专项科研计划项目(16JK1081)

Study on Hydrolytic Enzyme and Nitrifying Bacteria Agents Enhanced Treatment of Tannery Wastewater

MA Hongrui,WANG Huiqin,ZHU Chao,ZHOU Jianjun   

  1. School of Environmental Science and Engineering, Shaanxi University of Science &Technology, Xi’an 710021, China
  • Received:2019-03-04 Online:2019-08-28 Published:2019-09-09
  • Contact: MA Hongrui

摘要:

针对制革废水高悬浮物、高油脂、高总氮、高氨氮的特点,通过在传统A/O工艺的A段投加两种水解酶,在O段投加两种硝化菌剂实现制革废水的分段强化脱氮处理,并考察菌剂的不同活化以投加方式对脱氮效率的影响。结果表明,投加蛋白酶可有效去除高浓度制革综合废水中的TCOD、SCOD,投加脂肪酶可将高浓度制革综合废水中的悬浮物转化为溶解性物质,两种水解酶均可提高废水的可生化性。比较直投菌粉和经不同方案活化后的菌剂处理废水后发现,投加活化后的Z菌剂可在72 h实现氨氮的达标排放,去除率达96%,达标时间较直投菌粉时缩短了近50 h。对比两种菌剂在各自不同的活化及投加方式下对氨氮的强化去除效果后发现,它们之间的差异不大。

关键词: 水解酶, 硝化菌剂, 制革废水, 活化方式, 投加方式

Abstract:

Aiming at the characteristics of tannery wastewater with high suspended matter, high oil, high total nitrogen and high ammonia nitrogen, two kinds of hydrolytic enzymes were added in section A . Two kinds of nitrifying bacteria were added in section O to realize the stepped-enhanced denitrification of tannery wastewater in A/O process, and the effects of different activation and dosing methods of microbial agents on nitrogen removal efficiency were also investigated. The results indicated that protease can effectively remove TCOD and SCOD, and lipase can transform suspended substance into soluble substance to improve the biodegradability of tannery wastewater. The effects of direct injection and different activation methods on wastewater treatment were compared. It was found that the activated Z microbial agent could achieve high efficiency denitrification in wastewater treatment, and the removal rate could reach 96% at 72 h, which could realize the discharge of ammonia nitrogen to the standard. The time of reaching the standard was shortened by nearly 50 h compared with that of direct injection of microbial agents. After comparing the removal of ammonia nitrogen from tannery wastewater by two kinds of microbial agents under different activation and dosage patterns, it was found that there was little difference in the enhancement effect between them.

Key words: hydrolytic enzyme, nitrifying bacteria agents, tannery wastewater, activation method, dosing method

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