Biological reinforcing technology for increasing stability of oil-contained waste water treatment system

A wastewater treatment system and bio-augmentation technology, applied in the fields of biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the high load, impact, pollutant type and concentration variation of the treatment system It can achieve the effect of rapid decline of enzyme activity, improvement of community structure, and rapid recovery and stable operation.

Inactive Publication Date: 2007-08-29
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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AI Technical Summary

Problems solved by technology

However, in the actual refining process, due to the different sources of processed crude oil and the different refining units operating at different times, the types and concentrations of pollutants in oily wastewater vary greatly, often causing high load impact on the treatment system

Method used

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  • Biological reinforcing technology for increasing stability of oil-contained waste water treatment system

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Experimental program
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Effect test

Embodiment 1

[0017] Example 1: 2000 mg / L activated sludge was added to SBR reactors A and B with an effective volume of 1 L to treat the refinery wastewater from Nanchong Oil Refinery after oil separation and air flotation treatment. The results of the wastewater quality analysis are shown in the table 1. According to Table 1, it is determined that the composite microbial bacterial agent used is the petroleum-based high-efficiency degradation composite bacterial agent ENVICAS-PD produced by Chengdu Zhongke Chuangzhi Environmental Protection Co., Ltd. (the number of viable bacteria in the bacterial agent is about 10 9 individual / mL), without adding microbial growth promoters. Reactor A was used as a control, and 100mL of the selected compound microbial agent was added to reactor B. After 3 days of continuous normal operation, the COD removal rate reached a stable level. Then increase the water load, carry out 2 days of high-load impact, and analyze and detect various biological indicators ...

Embodiment 2

[0033] Example 2: 2000 mg / L activated sludge was added to SBR reactors A and B with an effective volume of 5 L to treat high-concentration refinery wastewater from Nanchong Oil Refinery. The water quality analysis results are shown in Table 6. According to Table 6, it is determined that the composite microbial bacterial agent used is the petroleum-based high-efficiency degradation composite bacterial agent ENVICAS-PD and the polycyclic aromatic hydrocarbon and heterocyclic high-efficiency degradation composite bacterial agent ENVICAS-ND produced by Chengdu Zhongke Chuangzhi Environmental Protection Co., Ltd. The number of bacteria is about 109 / mL), and the microbial growth promoter is a vitamin compound liquid growth promoter produced by Chengdu Zhongke Chuangzhi Environmental Protection Co., Ltd. (the main components are vitamin B12, biotin, niacin, aminobenzoic acid, pyridoxamine hydrochloride, calcium pantothenate, dipotassium hydrogen phosphate, etc.). Reactor A was used a...

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Abstract

The invention relates to a biology strengthening technology to improve oily wastewater processing system stability. It tests the waste quality, system running parameter and key biological indicator by ERIC-PCR. It selects microbiology compound fungus agent or the compound, when system running normally, enduring high load or impacted by toxic pollutant, according 1013-1015 per cubic meter, adding 1013-1016 live fungus special effect degradation functional fungus, adding compound microbiology fungus agent or the compound into the system, controlling system parameter: dissolved oxygen 2-5mg / L, taking water pH 6.5-9.0, inner system pH 6.5-8.5, biomass 109-1016CFU, and dehydrase activity 10U. The invention realizes optimal control to process system, fully improves dislodging efficiency and stability of the process system. And it also achieves high environment social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a bioaugmentation technology for improving the stability of an oily wastewater treatment system. Background technique [0002] Oily wastewater is a wide-ranging and large-scale pollution source produced in petroleum development and utilization activities. It is a high-concentration and refractory organic wastewater. It mainly contains alkanes, aromatic hydrocarbons, volatile phenols, ammonia nitrogen and other pollutants. It has high toxicity and large discharge volume. , and the water quality and quantity are unstable, causing great pollution to the environment, which needs to be treated before it can be discharged. Taking the oily wastewater from oil refineries as an example, most of the wastewater in domestic refineries is treated by oil separation-air flotation-biochemical treatment, among which biochemical treatment main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34G01N35/00
Inventor 李旭东李文卫谭周亮
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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