Process and device for deeply purifying waste emulsion

A waste emulsion and deep purification technology, which is applied in metallurgical wastewater treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of high technical cost, incomplete treatment, pollution of the environment, etc., and achieve treatment efficiency and strong impact resistance, enhanced biochemical properties, and improved water quality

Inactive Publication Date: 2017-08-18
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the problems of high cost, low efficiency, incomplete treatment, and environmental pollution after being discharged into the water body in the existing waste emulsion advanced treatment technology, the present invention provides a process for deep purification of waste emulsion by using a non-reflux multi-stage AO system and devices to achieve low energy consumption, high efficiency and simultaneous removal of pollutants in waste emulsion

Method used

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  • Process and device for deeply purifying waste emulsion
  • Process and device for deeply purifying waste emulsion

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Effect test

Embodiment 1

[0030] What this embodiment deals with is 48m 3 The waste emulsion 1 after the pretreatment of / d: first collect the waste emulsion in the water collection tank 1, pass it into the domestic sewage and dilute it by 2 times, the COD concentration after dilution is 572.19mg / L, and the total oil concentration is 73.45mg / L L, the total phosphorus concentration is 3.54mg / L, the total nitrogen concentration is 14.71mg / L, and the ammonia nitrogen concentration is 5.33mg / L. Reactors 8 to 12 are connected in series so that there is a certain liquid level difference between the reactors, and elastic silk packing 6 is filled, fan 4 is turned on, and the flow rate of the fan is adjusted to 8L / min according to the reading of gas flow meter 5, and the gas is fed by The microporous aerator 13 leads into the reactor. Turn on the water pump 2 again, and adjust the flow rate of the water pump to 4m according to the reading of the flow meter 3 3 / h, the mixed solution was injected into the lowe...

Embodiment 2

[0032] What this embodiment deals with is 12m 3 The waste emulsion 2 after the pretreatment of / d: first collect the waste emulsion in the water collection tank 1, pass it into domestic sewage and dilute it 4 times, the COD concentration after dilution is 319.36mg / L, and the total oil concentration is 49.8mg / L L, the total phosphorus concentration is 2.62mg / L, the total nitrogen concentration is 13.83mg / L, and the ammonia nitrogen concentration is 5.94mg / L. Reactors 8 to 12 are connected in series so that there is a certain liquid level difference between the reactors, and elastic silk packing 6 is filled, fan 4 is turned on, and the flow rate of the fan is adjusted to 8L / min according to the reading of gas flow meter 5, and the gas is fed by The microporous aerator 13 leads into the reactor. Turn on the water pump 2 again, and adjust the flow rate of the water pump to 2m according to the reading of the flow meter 3 3 / h, inject the mixed solution into the lower end of the ae...

Embodiment 3

[0034] What this embodiment deals with is 12m 3 The waste emulsion 3 after the pretreatment of / d: first collect the waste emulsion in the water collection tank 1, pass it into the domestic sewage and dilute it 3 times, the COD concentration after dilution is 345.97mg / L, and the total oil concentration is 56.98mg / L L, the total phosphorus concentration is 2.06mg / L, the total nitrogen concentration is 18.61mg / L, and the ammonia nitrogen concentration is 5.72mg / L. Reactors 8 to 12 are connected in series so that there is a certain liquid level difference between the reactors, and elastic silk packing 6 is filled, fan 4 is turned on, and the flow rate of the fan is adjusted to 8L / min according to the reading of gas flow meter 5, and the gas is fed by The microporous aerator 13 leads into the reactor. Turn on the water pump 2 again, and adjust the flow rate of the water pump to 1.33m according to the reading of the flow meter 3 3 / h, the mixed solution was injected into the lowe...

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Abstract

The invention discloses a process and device for deeply purifying waste emulsion. The process comprises the following steps: firstly, collecting waste emulsion in a water collection tank, diluting by introducing domestic sewage, serially connecting non-reflux multi-stage AO reactors, and leading a certain liquid level difference among the reactors; and filling elastic silky filler, opening a fan, introducing gas into the reactors through micro-porous aerators, opening a water pump, injecting mixed liquid into the lower end of a primary aerobic reactor, dosing a synchronous denitrification phosphorous removing bacterial agent B8 to enable the mixed liquid to be in sufficient contact with the elastic silky filler on which a microorganism membrane grows, deeply purifying the waste emulsion through adsorption, deposition, decomposition and other effects of microorganisms in the aerobic-anaerobic repeated alternating processes, enabling the purified clear water to flow into a disinfecting water tank, and discharging the disinfected clear water into a water body. By adopting the process, the clear water in the disinfecting water tank has COD concentration of 87.34mg / L, total oil concentration of 3.96mg / L, total phosphorous concentration of 0.65mg / L, total nitrogen concentration of 3.78mg / L and ammonia-nitrogen concentration of 1.17mg / L, and meets the requirements of I-level discharge of the Integrated Wastewater Discharge Standard (GB 8978-1996).

Description

[0001] 1. Technical field [0002] The invention belongs to the technical field of "three wastes" treatment in the metal cutting processing industry, and in particular relates to a deep purification process and device for waste emulsion. [0003] 2. Background technology [0004] In the metal cutting industry, oil-in-water emulsions are often used as lubricating, cooling and cleaning fluids, which can improve the quality of metal cutting products. But it has a certain lifespan, and the recycling rate is low, seriously affecting and polluting the environment. After the high-concentration waste emulsion is pretreated by flocculation and demulsification, the content of total oil and COD is greatly reduced, but some small particles and soluble oils are still not removed, and it cannot meet the "Comprehensive Wastewater Discharge Standard Edition" (GB8978- 1996) first-level emission standard, the use of inorganic ceramic membrane device for advanced treatment will cause a sharp inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/32C02F103/16
CPCC02F1/50C02F3/308C02F9/00C02F2101/325C02F2103/16
Inventor 张文艺钱栋吴旭鹏彭明国蔡庆庆沈红池
Owner CHANGZHOU UNIV
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