Harbor chemical wastewater processing method

A treatment method and chemical technology, which is applied in the field of port chemical wastewater treatment, can solve the problems of the wharf sewage treatment system, such as inability to operate stably and normally, difficulties in popularization, strong toxicity, etc., to achieve reduced toxicity, fast renewal speed, and reduced production volume Effect

Inactive Publication Date: 2009-08-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current treatment process is relatively simple, which can only meet the treatment requirements of specific water quality, and it is difficult to popularize. Moreover, most of the existing wharf sewage treatment systems cannot adapt to the characteristics of large changes in water quality and strong toxicity of chemical tank washing water, resulting in wharf sewage treatment. The system cannot run stably and normally

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The monthly volume of tank washing wastewater in a port in Panyu, Guangzhou is about 100t, the influent COD is 800mg / L, the oil content is 600mg / L, and the SS is 100mg / L. After being collected by each tank area, it is uniformly discharged into the adjustment tank, and then pumped into the oil separation-air flotation system for treatment. The surface load of the oil separation tank is 1.2m 3 / m 2 h, the hydraulic retention time is 2h. After treatment, it is then treated with air flotation. In order to reduce the amount of sludge, the air flotation system does not add chemicals, and the surface load of the air flotation is 6m 3 / m 2h, the residence time is 30 minutes, oil separation—the air flotation system is composed of oil separation tank and air flotation; after the air flotation, the residual oil slick and most of the suspended pollutants are removed. A small amount of slick oil and scum produced during this process are concentrated in the sludge hopper for natur...

Embodiment 2

[0024] The monthly volume of tank washing wastewater in a certain port in Zhuhai is about 300t. After being collected by each tank farm, it is uniformly discharged into the adjustment tank, and then pumped into the oil separation-air flotation system for treatment. The COD of the incoming water is 500mg / L, and the oil content is 400mg / L, SS is 60mg / L. The surface load of the grease trap is 1.4m 3 / m 2 h, the hydraulic retention time is 1.5h. After treatment, it is then treated with air flotation, and the surface load of air flotation is 11m 3 / m 2 h, the residence time is 18 minutes, and the treated wastewater enters the aerobic biological fluidized bed. The aerobic biological fluidized bed uses activated carbon with a particle size of 1mm as the carrier, and the total hydraulic retention time of the wastewater in it is 6h. The air-to-water ratio is 10:1. The effluent of the biological fluidized bed overflows into the anaerobic sedimentation tank, and the residence time i...

Embodiment 3

[0026] A port in Dongguan has a monthly volume of tank washing wastewater of about 50 tons. After being collected by various tank farms, it is uniformly discharged into the adjustment pool, and then pumped into the oil separation-air flotation system for treatment. The COD of the incoming water is 2000mg / L, and the oil content is 800mg / L, SS is 200mg / L. The surface load of the grease trap is 0.8m 3 / m 2 h, the hydraulic retention time is 3h. After treatment, it will be treated with air flotation, and the surface load of air flotation is 4m 3 / m 2 h, the residence time is 50 minutes, the treated wastewater enters the aerobic biological fluidized bed, the aerobic biological fluidized bed uses quartz sand with a particle size of 1mm as the carrier, and the total hydraulic retention time of the wastewater in it is 18h , the gas-water ratio is 30:1. The effluent of the biological fluidized bed overflows into the anaerobic sedimentation tank, and the residence time is 136h. Th...

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Abstract

The invention discloses a treatment method for port chemicals wastewater. The method comprises the following steps: the oil separation-air floating treatment, the biological fluidized bed treatment, the anaerobic settling tank treatment and the ozone aeration biological filter integral device treatment. The port chemicals wastewater is retained for 1 to 3 hours in an oil separation tank; and the surface load of the oil separation tank is 0.8 to 1.5m / m.h. The hydraulic power is retained for 6 to 18 hours in a biological fluidized bed; and the gas-water ratio is 10-30:1. The hydraulic power is retained for 12 to 36 hours in an anaerobic settling tank. Then after the wastewater is retained for 1 to 2 hours in an intermediate regulation tank, 50 to 200 mg / L of ozone is added. After being oxidized by the ozone, the wastewater undergoes the biochemical treatment in the aeration biological filter; and the hydraulic power is retained for 6 to 12 hours in the aeration biological filter. The method realizes the miniaturization of equipment, reduces the floor space and energy consumption, and has stable treatment effect. The automatic control on the wastewater treatment process is easily realized and the personnel operation is simple, and the method has good industrialized application prospect.

Description

technical field [0001] The invention relates to a treatment method for port chemical waste water, more specifically a treatment method for chemical waste water containing general organic poisons. Background technique [0002] Port chemical wastewater refers to the sewage generated when bulk liquid chemical carriers need to be cleaned or replaced (such as tank washing, tank washing, etc.). The main pollutants in the water are the residues from cargo stripping and tank washing after unloading. Not only because the sewage contains chemical substances that are difficult to treat biologically, such as styrene, acrylonitrile, formaldehyde, and cleaning agents used to clean the cabin, but also because of the intermittent action of the special bulk chemical terminal and the variety of pollutants, the volume and concentration of the wastewater are extremely high. Variability and randomness. It is generally believed that this is a type of wastewater that is difficult to treat. [0...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/24C02F1/40C02F1/78C02F3/30C02F3/10
CPCY02W10/10
Inventor 汪晓军顾晓扬
Owner SOUTH CHINA UNIV OF TECH
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