Optimal distribution of carbon source in SBR for the upgrading of high nitrogen printing and dyeing wastewater

doi:10.11894/iwt.2018-0837

Abstract

Abstract:

According to the optimal distribution of carbon source, the effect of denitrification in an SBR was studied under the conditions of multi-stage water intake and variable water inlet ratio. The results showed that the denitrification effect of the system was the best when the SBR selected the three-stage water inflow mode and the optimal water inflow rate was 3:2:1 in the basin. Besides, the removal rate of NH₄⁺-N and TN was 80.5% and 67.4%, respectively. The optimized carbon source distribution for SBR was conducted to upgrade the actual high-nitrogen printing and dyeing wastewater treatment project. The TN and NH₄⁺-N of effluent met the indirect emission standard of Discharge Standard of Water Pollutants for Dyeing and Finishing of Textile Industry(GB 4278-2012).

Key words: printing and dyeing wastewater, denitrification, optimized carbon source, step-wise feeding

摘要：

按照碳源优配原则优化分配进水流量，进行多段进水和进水比例可变条件下SBR脱氮效果研究。实验结果表明，采用SBR三段进水模式，当进水流量比为3：2：1时，系统脱氮效果最佳，此时NH₄⁺-N、TN去除率分别为80.5%、67.4%。采用碳源优配原则对实际高氮印染废水处理工程进行提标改造，最终出水TN和NH₄⁺-N均能达到《纺织染整工业水污染物排放标准》（GB 4278-2012）的间接排放标准。

关键词: 印染废水, 脱氮, 碳源优配, 多段进水

CLC Number:

X703

Xiao Wei, Jia Wang, Ziyuan Wang, Huiyue Liu, Zijun Yang, Xin Jin, Pengkang Jin. Optimal distribution of carbon source in SBR for the upgrading of high nitrogen printing and dyeing wastewater[J]. Industrial Water Treatment, 2019, 39(10): 85-88.

尉笑, 王佳, 王自元, 刘惠岳, 杨梓君, 金鑫, 金鹏康. 碳源优配SBR工艺用于高含氮印染废水提标改造[J]. 工业水处理, 2019, 39(10): 85-88.

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URL: https://www.iwt.cn/EN/10.11894/iwt.2018-0837

https://www.iwt.cn/EN/Y2019/V39/I10/85

Figures/Tables 7

References 12

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项目	进水方式	运行周期/h	运行模式	污泥质量浓度
一段进水	等流量进水	8	瞬时进水，厌氧1 h，好氧4 h，缺氧2 h，静置0.5 h，排水0.5 h	均控制在3 000 mg/L
二段进水	间歇进水	8	第1段，瞬时进水，厌氧0.5 h，好氧2 h，缺氧1 h；第2段与前段一致；静置0.5 h，排水0.5 h
三段进水	间歇进水	8	第1段，瞬时进水，厌氧20 min，好氧80 min，缺氧40 min；第2、3段与第1段一致；静置0.5 h，排水0.5 h
四段进水	间歇进水	8	第1段，瞬时进水，厌氧0.25 h，好氧1 h，缺氧0.5 h；第2、3、4段与第1段一致；静置0.5 h，排水0.5 h

项目	进水方式	运行周期/h	运行模式	污泥质量浓度
一段进水	等流量进水	8	瞬时进水，厌氧1 h，好氧4 h，缺氧2 h，静置0.5 h，排水0.5 h	均控制在3 000 mg/L
二段进水	间歇进水	8	第1段，瞬时进水，厌氧0.5 h，好氧2 h，缺氧1 h；第2段与前段一致；静置0.5 h，排水0.5 h
三段进水	间歇进水	8	第1段，瞬时进水，厌氧20 min，好氧80 min，缺氧40 min；第2、3段与第1段一致；静置0.5 h，排水0.5 h
四段进水	间歇进水	8	第1段，瞬时进水，厌氧0.25 h，好氧1 h，缺氧0.5 h；第2、3、4段与第1段一致；静置0.5 h，排水0.5 h

项目	COD/（mg·L^-1）	BOD₅/（mg·L^-1）	pH	TN/（mg·L^-1）	NH₄⁺-N/（mg·L^-1）
进水	400~600	80~100	8~9	60~90	40~50
出水	91±11.4	10.3±3.2	7.1±0.61	21±2.45	9.0±3.5
排放限值	200	50	6~9	30	20

项目	COD/（mg·L^-1）	BOD₅/（mg·L^-1）	pH	TN/（mg·L^-1）	NH₄⁺-N/（mg·L^-1）
进水	400~600	80~100	8~9	60~90	40~50
出水	91±11.4	10.3±3.2	7.1±0.61	21±2.45	9.0±3.5
排放限值	200	50	6~9	30	20

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