Biochemical treatment method of refinery wastewater

A technology for oil refinery wastewater and biochemical treatment, applied in natural water treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as harsh start-up conditions and poor universality of granular sludge, and save infrastructure Investment and operating costs, improving the effective utilization rate, and enhancing the effect of degradation ability

Active Publication Date: 2019-07-23
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the universality of granular sludge is poor and the conditions for starting work are relatively harsh. Only when granular sludge can grow in the wastewa

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  • Biochemical treatment method of refinery wastewater
  • Biochemical treatment method of refinery wastewater
  • Biochemical treatment method of refinery wastewater

Examples

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Example Embodiment

[0110] Example 1

[0111] The object to be treated in this embodiment is oily wastewater from a refinery. After the oily wastewater is diluted and pretreated for oil removal, the oil content is 150-170 mg / L, the COD is 800-1000 mg / L, and the ammonia nitrogen is 8-25 mg / L. L of refinery wastewater to be treated. According to the volume of UASB and SBR, the treated water volume of this implementation is 0.2m 3 / d.

[0112] The first influent is the diluted product of the oil refining wastewater to be treated, and is used for the cultivation and domestication of anaerobic granular sludge. The oil content of the first influent is 120 mg / L, and the COD is 500-600 mg / L;

[0113] The second influent is the diluted product of the oil refining wastewater to be treated, and is used for the cultivation and domestication of aerobic granular sludge. The oil content of the second influent is 70 mg / L, and the COD is 200-300 mg / L;

[0114] The biochemical treatment of oil refining wastewat...

Example Embodiment

[0147] Example 2

[0148] The object to be treated in this embodiment is oily wastewater from a heavy oil refinery. After the oily wastewater is diluted and pretreated for oil removal, the oil content is 250-280 mg / L, the COD is 1500-2500 mg / L, and the ammonia nitrogen is 8- 25mg / L of oil refining wastewater to be treated. According to the volume of UASB and SBR, the treated water volume of this implementation is 1.8m 3 / d.

[0149] The first influent is the diluted product of the oil refining wastewater to be treated, which is used for the cultivation and domestication of anaerobic granular sludge. The oil content of the first oil refining wastewater is 120 mg / L, and the COD is 500-600 mg / L;

[0150] The second influent is the diluted product of the oil refining wastewater to be treated, and is used for the cultivation and domestication of aerobic granular sludge. The oil content of the second influent is 70 mg / L, and the COD is 200-300 mg / L;

[0151] The biochemical treat...

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Abstract

The invention provides a biochemical treatment method of refinery wastewater. A UASB (upflow anaerobic sludge blanket) anaerobic reactor and an SBR (sequencing batch reactor) aerobic reactor which areconnected in series are arranged, and cultured and acclimated anaerobic granular sludge and aerobic granular sludge are arranged in the UASB anaerobic reactor and the SBR aerobic reactor respectively. The treatment method comprises following processes: a UASB and an SBR operate, to-be-treated refinery wastewater is introduced into the UASB and subjected to anaerobic treatment, and after the wastewater subjected to the anaerobic treatment is discharged, the wastewater is introduced into the SBR and subjected to aerobic treatment, wherein oil content of the to-be-treated refinery wastewater isnot higher than 300 mg/L, COD of the wastewater entering the SBR is 200-600 mg/L, and pH is 6.5-7.5. With the adoption of the treatment method, sludge loss can be avoided, the area occupied by the reactor is saved, the infrastructure investment cost is reduced, and the index of the treated wastewater can meet the related industry standard.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a biochemical treatment method for oil refinery wastewater. Background technique [0002] Due to the complex refining process, long process and different material components, the water quality of oil refining wastewater fluctuates greatly, and the pollutants are numerous and complex in composition. It not only contains petroleum, ammonia nitrogen, sulfide and other substances, but also contains a large amount of dissolved organic matter, including Phenols, organic acids, aldehydes and ketones, esters, alkanes, polycyclics, organic amines, alcohols, nitriles, heterocyclic compounds, etc. In recent years, as the proportion of heavy crude oil processed in the petroleum refining process continues to increase, the biological toxicity, treatment load and biodegradation difficulty of refinery wastewater continue to increase, the quality of wastewater continues to deteriorate, and the loa...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F103/36C02F101/16
CPCC02F3/30C02F2101/16C02F2103/365
Inventor 王庆宏陈春茂梁家豪明婕王鑫詹亚力郭绍辉
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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