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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
  • Description
  • Claims
  • Application Information

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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 wastewater to be treated, exist stably, and cultivate targeted degrading bacteria in the wastewater to be treated, can the granular sludge be used play to its advantage

Method used

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

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Embodiment 1

[0111] The treatment object of this embodiment is the oily waste water of a certain refinery. After the oily waste water is diluted and deoiled pre-treated, 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 amount of treated water in this implementation is 0.2m 3 / d.

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

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

[0114] The present embodiment comprises the following steps to the biochemical treatment ...

Embodiment 2

[0148] The treatment object of this embodiment is oily wastewater from heavy oil refineries. After dilution treatment and deoiling pretreatment, the oily wastewater will have an oil content of 250-280 mg / L, COD of 1500-2500 mg / L, and ammonia nitrogen of 8- 25mg / L of refinery wastewater to be treated. According to the volume of UASB and SBR, the amount of treated water in this implementation is 1.8m 3 / d.

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

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

[0151] The present embodiment comprises the following steps to the bioc...

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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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