A project on treatment of high concentration flavors and fragrances wastewater

doi:10.19965/j.cnki.iwt.2022-0314

Abstract

Abstract:

Flavors and fragrances are widely used in food and daily necessities industry， and is one of the important additives. The wastewater produced in production is characterized by complex water quality， high COD and poor biodegradability. The traditional treatment process of flavors and fragrances wastewater is oil removal， air flotation， hydrolysis acidification， contact oxidation process. The process has the limitations of long time， large area and unstable effluent quality when treating flavor and fragrance wastewater. Due to the lack of advanced treatment， it has been difficult for the conventional process to meet requirements of emission standards under the situation of current environmental protection standard improvement. In view of the characteristics of flavor and fragrance wastewater， processes of component-based pretreatment， anaerobic， oxygen aeration and advanced treatment were integrated into conventional treatment process. The results showed that the combined processes could treat wastewater of flavors and fragrances well and operate stably under high load. After treatment， the effluent quality could meet the requirements of the secondary standard in the Integrated Wastewater Discharge Standard（GB8978—1996）， and also met the requirements of admission standard for sewage plants.

Key words: flavors and fragrances, wastewater treatment, anaerobic, oxygen aeration

摘要：

香料香精广泛应用于食品与日用品行业，是重要的添加剂之一。其生产过程中产生的废水具有水质复杂、有机物浓度高、可生化降解性差等特点。香料香精废水的传统处理工艺为隔油+气浮+水解酸化+接触氧化工艺。采用此工艺处理香料香精废水时具有一定局限性：停留时间长、占地面积大、出水水质较不稳定；同时，由于缺少深度处理工艺，在现行环保标准提高的形势下，传统工艺已很难达到最新排放标准的要求。为此，针对香料香精废水的特点，提出在常规废水处理工艺的基础上，增加分质预处理、厌氧、纯氧曝气和深度处理等工艺。工程实践表明，分质预处理、厌氧、纯氧曝气和深度处理等工艺联合可很好地处理此类废水，并能在较高的污染负荷下稳定运行。香料香精废水经过处理后可达到《污水综合排放标准》（GB8978—1996）中的二级标准要求，同时符合污水厂的相关纳管标准要求。

关键词: 香料香精, 废水处理, 厌氧, 纯氧曝气

CLC Number:

X703

Nini ZHANG,Tao HUANG. A project on treatment of high concentration flavors and fragrances wastewater[J]. Industrial Water Treatment, 2022, 42(12): 174-178.

张妮妮,黄涛. 高浓度香料香精废水处理工程实例[J]. 工业水处理, 2022, 42(12): 174-178.

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URL: https://gyscl.magtechjournal.com/EN/10.19965/j.cnki.iwt.2022-0314

https://gyscl.magtechjournal.com/EN/Y2022/V42/I12/174

Figures/Tables 3

References 12

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废水种类	水量/（t·d^-1）	pH	COD/（mg·L^-1）	石油类/（mg·L^-1）	氨氮/（mg·L^-1）	其他污染物/（mg·L^-1）
高浓高盐废水	30	2~5	100 000	2 000	<15	Na₂SO₄：20 000； F^－：16 000； PO₄^3－：7 500；对甲苯磺酸：3 500
其他废水	290	3~6	6 000	1 000	<15	—
生活污水	30	6~9	300	—	30~40	—
初期雨水	100	5~10	400	<100	<15	—

废水种类	水量/（t·d^-1）	pH	COD/（mg·L^-1）	石油类/（mg·L^-1）	氨氮/（mg·L^-1）	其他污染物/（mg·L^-1）
高浓高盐废水	30	2~5	100 000	2 000	<15	Na₂SO₄：20 000； F^－：16 000； PO₄^3－：7 500；对甲苯磺酸：3 500
其他废水	290	3~6	6 000	1 000	<15	—
生活污水	30	6~9	300	—	30~40	—
初期雨水	100	5~10	400	<100	<15	—

处理单元	COD/（mg·L^-1）
生化进水	8 500~10 500
一级水解酸化池	7 300~9 450
厌氧罐	5 000~6 140
一级纯氧池	1 070~1 350
二级水解酸化池	920~1240
二级纯氧池	240~280
保障沉淀池	160~190
排放限值	200

处理单元	COD/（mg·L^-1）
生化进水	8 500~10 500
一级水解酸化池	7 300~9 450
厌氧罐	5 000~6 140
一级纯氧池	1 070~1 350
二级水解酸化池	920~1240
二级纯氧池	240~280
保障沉淀池	160~190
排放限值	200

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