CN103739083A

CN103739083A - Method for removing phenol in industrial wastewater

Info

Publication number: CN103739083A
Application number: CN201410028911.5A
Authority: CN
Inventors: 王凯; 谢树莲; 冯佳; 蔡瑾; 王飞鹏
Original assignee: Shanxi University
Current assignee: Shanxi University
Priority date: 2014-01-22
Filing date: 2014-01-22
Publication date: 2014-04-23

Abstract

The invention provides a novel application of polygonum orientale based on a strong tolerance property and an efficient removing capability of the polygonum orientale to a high-toxin substance phenol and also provides a method for treating the phenol in industrial wastewater. The treatment method comprises the following steps: collecting the polygonum orientale which has a tall and straight plant, is healthy and has no plant diseases and insect pests and planting on a floating bed; planting 4-12 plants of the polygonum orientale on each square meter of the floating bed which covers 1/3-2/3 of the water surface; putting the floating bed into industrial wastewater with the water depth of 0.5-2m and the depth of less than or equal to 80mg/L; and treating for 5-15 days under a natural light full-illumination condition, wherein the removing rate of the phenol can be 89.17%-99.98%. The method can be used for removing the phenol of a river containing the phenol wastewater and can also be used for greening and beautifying the environment.

Description

A kind of method of removing phenol in trade effluent

Technical field

The present invention relates to method of wastewater treatment, be specifically related to a kind of method of removing phenol in trade effluent, more specifically say take smartweed as repair materials, the treatment process of centering lower concentration phenolic wastewater.

Background technology

Phenolic wastewater is one of trade effluent of very harmful in the world today and extensive existence, by many countries such as China, is listed in the Black List of priority pollutant.Phenol has the harm of " three cause (teratogenesis, carcinogenic, mutagenesis) ", and hydrobiont and the mankind are had to great threat.

The method of traditional removal phenol in wastewater comprises chemical oxidization method, electrolytic process, absorption method, liquid-film method etc., but these methods but exist, investment is large, resource is few, energy consumption is high, easily produce the shortcomings such as secondary pollution, more can not meet the demand of making middle view containing phenol trade effluent river structural reform, cannot adapt to the trend of Modern Urban Development.

Along with the development of modern city, to the multiple demand of urban ecological environment and view, urgently find a kind of effective, cost is low, and the eco-friendly novel phenol method that goes, realizing containing when the reparation of phenol trade effluent river and administering, meets the body greening of waste water river and the requirement beautifying.

Summary of the invention

The object of the present invention is to provide the new purposes of smartweed, be also to provide a kind of method of removing phenol in trade effluent.

Smartweed provided by the invention is in the application of processing in wastewater containing phenol.

Smartweed is a kind of higher aquatic plants, has the report as sterilant.The phenol of can tolerate≤80mg/L of smartweed is found in the research trial of this seminar.At this concentration range smartweed, can keep its normal upgrowth situation and view and admire feature, and reach the effect of good removal phenol.

A kind of method of processing phenol in trade effluent provided by the invention, comprises the steps:

(1) collection plant is tall and straight upright, and the healthy smartweed without disease and pest, plants in floating bed;

(2), according to every square meter floating bed plantation 4～12 strain smartweeds, floating bed covers water surface 1/3-2/3(preferably 1/2), floating bed is placed in to the trade effluent of 0.5～2 meter of the depth of water (preferably 0.5～1 meter), concentration≤80mg/L phenol;

(3) under natural light full exposure condition, process 5～15 days, can reach the effect of desirable removal phenol, clearance can reach 89.17%～99.98%.

Compared with the prior art, the present invention uses smartweed to remove the phenol in waste water, has following characteristics:

1), smartweed is widely distributed in China, source is sufficient, cultivates easily, output is very large, cultivation management is simply extensive, output is high, can meet practical application.

2), smartweed centering Low Concentration Phenol (0-80mg/L) has stronger tolerance and obvious removal effect.

3), as a kind of plant restoration method, there is stable and reliable operation, plant materials and be easy to results, and can not cause the advantage of secondary pollution.

4), removing in phenol in wastewater, met again the demand of afforesting and beautifying containing phenol trade effluent river, kill two birds with one stone.

Accompanying drawing explanation

The cultivating container of smartweed and matrix in Fig. 1 embodiment 1

The fixed sturcture of smartweed cultivating container in Fig. 2 embodiment 1

Fig. 3 embodiment 3 smartweeds are applied to containing phenol trade effluent river greenbelts on river bank photo

Embodiment

Embodiment 1

With smartweed, remove the phenol (<5mg/L) of lower concentration

According to Chinese sewage drainage standard, Low Concentration Phenol is 0-5mg/L scope.In phenolic wastewater discharge factory downstream, set up treatment tank, after I and II physico-chemical process is processed, the concentration that makes the pending phenol in wastewater that enters treating pond is 4mg/L; Select healthy smartweed, plant in diameter 20cm, in the plastic tub of high 25cm, inside fill out the porous-stone that particle diameter is 2.0cm, loading level be basin high 1/2, the lower aperture of making a call to 10 diameter 1cm of basin, so that root system fully contacts (as Fig. 1) with waste water.Floating bed preferred dimension is the plastic foamboard of 1.90 × 1.45 × 0.15m, and fixing the length of side is above the square structure plate of 0.45m, every 12, according to structural slab, central authorities are emptied, circular empty diameter is that 0.20m(is as Fig. 2).By insemination pot embedded structure plate, make smartweed floating bed.Guarantee that sewage lagoon blocks without high-lager building or structures around, under the condition of natural full exposure condition, smartweed floating bed is placed in to pending phenolic wastewater, floating bed covers the water surface 1/2, and the treatment time reaches 5 days.Test-results after 5 days shows: smartweed can reach to 4mg/L phenol 99.98% removal effect, phenol concentration after treatment is lower than Pyrogentisinic Acid 1mg/L(grade III Standard in Chinese integrated wastewater discharge standard (ISO14001)) restriction, can discharge and enter urban water-body.Then, we gather in plant purification material smartweed, and the plant more renewing is to keep going the sustainable of phenol effect to carry out.

Example 2

With smartweed, remove the phenol (5-80mg/L) of intermediate concentration

The selection of smartweed is with fixing the same, and this example is for the treatment of the intermediate concentration phenol of 80mg/L, and floating bed covers the water surface 1/2, natural full exposure condition, and the treatment time is 15.Result shows: for the intermediate concentration phenol of 80mg/L, smartweed needs the time of 15 days, can reach 99.22% phenol removal efficiency, thus the emission request that phenolic wastewater is reached.

Example 3

Afforest and beautify containing phenol trade effluent riverbank with smartweed

Because phenol toxicity is large, make two sides, wastewater containing phenol river envrionment conditions severe, general plant is difficult to growth, brings very large difficulty to river body greening.But according to our test, the middle Low Concentration Phenol of can tolerate≤80mg/L of smartweed, can reach 7 months vegetative period, and the florescence can reach 2 months, has the good effect of afforesting and beautifying.Therefore, according to phenolic wastewater river periphery landform, and the design of Riparian Zone Landscape construction and reconstruction, the floating bed of the smartweed of planting is arranged on to the trade effluent river bank that contains phenol, can play the effect (Fig. 3) of afforesting and beautifying waste water riverbank.

Claims

1. smartweed is in the application of processing in wastewater containing phenol.

2. a method of processing phenol in trade effluent, is characterized in that, comprises the steps:

(2) according to every square meter floating bed plantation 4～12 strain smartweeds, floating bed covers water surface 1/3-2/3, floating bed is placed in to the trade effluent of 0.5～2 meter of the depth of water, concentration≤80mg/L phenol;

(3), under natural light full exposure condition, process 5～15 days.

3. a kind of method of processing phenol in trade effluent as claimed in claim 2, is characterized in that, in described step (2), floating bed covers the water surface 1/2.

4. a kind of method of processing phenol in trade effluent as claimed in claim 2, is characterized in that, in described step (2), the depth of water is 0.5～1 meter.