Treatment method and device of oil-containing wastewater
A treatment device and treatment method technology, which is applied in mining wastewater treatment, natural water body treatment, water/sewage treatment, etc., to achieve the effects of less membrane cleaning times, low device cost, and good product water quality
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[0043] The following experimental examples can provide reference for those skilled in the art to implement the invention. However, these examples are not intended to limit the scope of the claims.
example 1
[0057] Raw water (500 ml, the same as used in the comparative example) was poured into a glass beaker. Two symmetrical steel electrode plates (3.2 cm x 4 cm) were partially submerged in water. A DC power supply (Land 2000, voltage range: 0-25V, maximum current: 5A, Wuhan Jinnuo Electronics Co., Ltd., Wuhan, China) was connected to the two electrodes. Raw water was heated and maintained at 85°C. A constant current (500 mA) was applied to the electrode for 10 minutes to perform electrocoagulation. The flocculated and suspended substances during the electrocoagulation process were filtered by sand filtration to obtain the filtrate. Extract part of the filtrate, and measure its COD, TOC and specific conductance when it is naturally cooled to room temperature. The remaining filtrate was used as feed water to the same membrane distillation apparatus as in Comparative Example at about 60° C., and then membrane distillation was performed under the same operating conditions as in Co...
example 2
[0064] 4000 ml of the same raw water as used in the comparative example was added to a 5000 ml glass beaker. Put the zeolite (pore size: 0.1 mm) connected to the compressed air tube into the beaker. Compressed air at a pressure of 0.8 psi is blown through the zeolite into the water to generate bubbles. The blowing operation was continued overnight in a fume hood. Then, the adhered and suspended substances on the wall of the glass beaker were removed to obtain air flotation treated water. There is about 10% weight loss during air flotation. Then, take about 1200 milliliters of water after the air flotation treatment and use it as the feed water of the membrane distillation device. The membrane distillation apparatus and its operating conditions were the same as in Example 1.
[0065] The COD, TOC and specific conductance of the raw water, the water treated by air flotation and the product water distilled from the membrane are listed in Table 4 below.
[0066] Table 4
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