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Pretreatment method of oil-containing organic wastewater

A pretreatment technology for organic wastewater, applied in water/sewage treatment, water treatment parameter control, neutralized water/sewage treatment, etc., can solve problems affecting the treatment process, clogging, etc., achieve efficient pretreatment, avoid hardening and clogging , the effect of improving the effect

Pending Publication Date: 2021-04-09
SHANGHAI ANHORN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the treatment of oily organic wastewater, oil-water separation pretreatment is required first, otherwise the oily substances in the wastewater will cause adverse effects such as compaction and blockage on the subsequent wastewater treatment process operation units, affecting the subsequent treatment process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Pretreatment of oily organic wastewater generated during the production process of a coal chemical plant. Under room temperature conditions, the specific operation steps are as follows: (1) adjust the pH of the oily organic wastewater to neutral; (2) add ferric sulfate to the oily organic wastewater, and the addition amount is 10g / L, that is, every liter of oily organic wastewater Add 10g of ferric sulfate; under the condition of 300r / min mechanical stirring, stir and mix for 15min to obtain the first mixture system; (3) add non-ionic polyacrylamide solution to the obtained first mixture system, and its addition amount is 200mg / L , under 60r / min mechanical stirring condition, stir and mix 5min, obtain the second mixture system; (4) while stirring continuously to the second mixture system, adjust the pH of the second mixture system to about 4, obtain the third mixture system, Solid flocs appear in the third mixture system and the water phase changes to clarification; (5)...

Embodiment 2

[0037] Pretreatment of oily organic wastewater generated during the production process of a coal chemical plant. Under room temperature conditions, the specific operation steps are as follows: (1) adjust the pH of the oily organic wastewater to neutral; (2) add ferric sulfate to the oily organic wastewater, the addition amount is 3g / L; in 180r / min mechanical stirring condition Stir and mix for 15 minutes to obtain the first mixture system; (3) add non-ionic polyacrylamide solution to the obtained first mixture system, the addition amount is 400mg / L, under the condition of 60r / min mechanical stirring, stir and mix 5min to obtain the second mixture system; (4) while continuously stirring the second mixture system, adjust the pH of the second mixture system to about 4 to obtain the third mixture system, and solid flocs appear in the third mixture system while the water phase become clarified; (5) stop mechanical agitation, filter the third mixture system, separate the solid flocs...

Embodiment 3

[0039]Pretreatment of oily organic wastewater generated during the production process of a coal chemical plant. At room temperature, the specific operation steps are as follows: (1) dilute the oily raw wastewater to three times the original volume, and adjust the pH of the oily organic wastewater to neutrality; (2) add ferric sulfate to the oily organic wastewater, the amount added 2g / L, under the condition of 120r / min mechanical stirring, stir and mix for 15min to obtain the first mixture system; (3) secondly, add anionic polyacrylamide solution to the obtained first mixture system, the addition amount is 300mg / L, under the condition of 120r / min mechanical stirring, stir and mix for 5min to obtain the second mixture system; (4) while continuously stirring the second mixture system, adjust the pH of the second mixture system to about 4 to obtain the third mixture system , solid flocs appear in the third mixture system and the water phase changes to clarification; (5) stop the...

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Abstract

The invention belongs to the field of oil-containing wastewater treatment, and discloses a pretreatment method of oil-containing organic wastewater. The method comprises the steps of regulating the pH value of the oil-containing organic wastewater to 6-9; adding an iron salt or an iron salt polymer into the oil-containing organic wastewater of which the pH value is adjusted, and mechanically stirring for the first time to obtain a first mixture system; adding a polyacrylamide solution into the first mixture system, and carrying out second mechanical stirring to obtain a second mixture system; adjusting the pH value of the second mixture system to 3-5 while carrying out secondary mechanical stirring on the second mixture system to obtain a third mixture system; and filtering the third mixture system to obtain filtrate. According to the pretreatment method of the oil-containing organic wastewater, oil substances and solid particles in the oil-containing organic wastewater can be removed, the chromaticity can be reduced, the pretreated effluent can meet the requirements of a subsequent process on the quality of inflow water, and adverse effects on the subsequent wastewater treatment process are avoided.

Description

technical field [0001] The invention belongs to the technical field of oily wastewater treatment, in particular to a pretreatment method for oily organic wastewater. Background technique [0002] The sources of oily organic wastewater are very extensive, and oily wastewater is produced in the production process of coal chemical industry, petrochemical industry, pesticide and food processing and other industries. Drinking source water polluted by oily wastewater can lead to human and animal infection, poisoning, and even cancer. In addition, when the oily wastewater is directly discharged into rivers, lakes and other water bodies without effective treatment, the dirty oil will adhere to the water surface, isolating the normal exchange between the water body and the air, and the oxygen content in the water body will continue to decline, which will not only lead to the pollution of aquatic plants and fish etc. cannot grow normally; and it will seriously affect the water qualit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/32
CPCC02F9/00C02F2101/32C02F1/66C02F2209/06C02F1/5281C02F2001/007C02F2209/02C02F1/56C02F1/001
Inventor 杨积志宋玉新李海波
Owner SHANGHAI ANHORN ENVIRONMENTAL TECH CO LTD
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