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Method for treating coking wastewater

A treatment method and technology for coking wastewater, applied in the fields of special compound water treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of high energy consumption and high investment cost for coking wastewater treatment, and achieve low energy consumption. Less pollution, simple operation effect

Inactive Publication Date: 2016-03-23
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the disadvantages of high investment cost, high energy consumption and secondary pollution in the treatment of coking wastewater by physicochemical, chemical and biological methods, a kind of water floating lotus root is provided as raw material. Fresh water lotus is cultivated by adding nutrients. After cultivation, the roots are cut off, adding creeper leaves and sycamore leaves to seal and ferment, adding cellulase for hydrolysis, mixing with fly ash and aluminum ash and extruding into cakes. Calcined in a muffle furnace, crushed and sieved, mixed with distilled water, sodium citrate and polyaluminum chloride, carried out secondary carbonization, rolled into granules and put into coking wastewater for treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Firstly, take fresh water laksa, keep 1 leaf of water laksa, remove excess leaves, keep the root, then soak it in clear water, and place it in a light environment, add 3g of urea, 1g of glucose and 3g of agar, cultivated in this way for 10 days, and when the root grows to 10cm, take out the root of water lettuce, rinse it with clean water, and cut it into small sections with a length of 1cm with a side knife; then put the root of water lettuce cut into small sections Put in the fermenter, add 10% creeper leaves, 10% sycamore leaves, 3% saccharomyces and 2% water at the same time, keep the temperature in the fermenter at 30°C, seal and ferment for 5 days, then increase the temperature to 40°C , sealed and fermented for 7 days; after the fermentation was completed, 3% cellulase was added thereto, hydrolyzed for 4 hours, and the enzymolyzed solution was obtained by filtration, 20g of aluminum ash and 20g of fly ash were added respectively, the temperature was controlled at ...

example 2

[0020]First take fresh water scutellaria leaves, keep 2 leaves of water sage lotus, remove excess leaves, keep the roots, then soak it in clear water, and place it in a light environment, add 4g urea, 2g glucose and 4g of agar, cultivated in this way for 11 days, until the root grows to 13cm, take out the root of water lettuce, rinse it with clean water, cut it into small sections with a length of 1.5cm with a side knife; then cut the root of water lettuce cut into small pieces Put into the fermenter, add 13% creeper leaves, 13% sycamore leaves, 4% saccharomyces and 3% water simultaneously, keep the temperature in the fermenter to be 33°C, seal and ferment for 6 days, then increase the temperature to 45°C. ℃, sealed and fermented for 8 days; after the fermentation is completed, add 4% cellulase to it, carry out hydrolysis for 5 hours, filter the enzymolysis solution, add 25g of aluminum ash and 25g of fly ash respectively, control the temperature at 125°C, and rotate 850r / min,...

example 3

[0023] First take fresh water syringa, keep 2 leaves of water syringa, remove excess leaves, keep the root, then soak it in clear water, and place it in a light environment, add 5g urea, 3g glucose and 5g of agar, cultivated in this way for 12 days, and when the root grows to 15cm, take out the root of water floating lotus, rinse it with clean water, cut it into small sections with a length of 2cm with a side knife; then put the above-mentioned small section of water floating lotus root Put into the fermenter, add 15% creeper leaves, 15% sycamore leaves, 5% saccharomyces and 5% water simultaneously, keep the temperature in the fermenter at 35°C, seal and ferment for 7 days, then increase the temperature to 50°C , sealed and fermented for 9 days; after the fermentation was completed, 5% cellulase was added thereto, hydrolyzed for 6 hours, and the enzymolyzed solution was obtained by filtration, 30g of aluminum ash and 30g of fly ash were added respectively, the temperature was c...

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Abstract

The invention discloses a method for treating coking wastewater and belongs to the technical field of coking wastewater treatment. Water lettuce roots serve as a raw material, firstly fresh water lettuces are selected, and nutrient substances are added for culture; after culture, the roots are taken to be cut off; parthenocissus tricuspidata leaves and fallen phoenix tree leaves are added and for sealed fermentation, and cellulase is added for hydrolysis; the product, fly ash and aluminum ash are subjected to coextrusion to be in a cake shape; calcination is performed in a muffle, and smashing and sieving are performed; distilled water, sodium citrate and polyaluminum chloride are added to be mixed, secondary carbonization is performed, the mixture is ground into particles, and the particles are placed in the coking wastewater for treatment. The method has the advantages that the method is easy to operate and low in energy consumption, and the treatment process is free of secondary pollution; the investment cost is 5% or above lower than that of other methods, the coking wastewater treatment effect is good, and it is detected that COD in water is not larger than 80.4 mg / L, and SS is not larger than 14.5 mg / L.

Description

technical field [0001] The invention relates to a treatment method for coking wastewater, which belongs to the technical field of coking wastewater treatment. Background technique [0002] Coking wastewater is a typical toxic and refractory organic wastewater. The coking plant mainly produces chemical products such as coke, commercial gas, ammonium sulfate and light benzene. The tar recovery system of the plant adopts the ammonium sulfate process, and the tar processing adopts two-tower continuous distillation in a tubular furnace, and the industrial naphthalene production process is a double-furnace two-tower continuous distillation, washing and refining. During coke oven gas cooling, washing, crude benzene processing and tar processing, coking wastewater containing phenol, cyanide, oil, ammonia and a large amount of organic matter is produced. The waste water has a large amount of discharge and complex water quality components. In addition to inorganic pollutants such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00
CPCC02F1/00C02F2305/00
Inventor 陈毅忠
Owner CHANGZHOU UNIV
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