Method for treating organic wastewater by modified bentonite

A technology of organic wastewater and bentonite, applied in water/sewage treatment, chemical instruments and methods, special compound water treatment, etc., can solve problems such as harsh conditions and difficult separation

Active Publication Date: 2016-04-20
江苏升和环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for utilizing modified bentonite to treat organic waste water in order to overcome the shortcomings of difficult separation and harsh conditions in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Using sodium-based bentonite, according to the amount of 1.0 mmol of manganese chloride per gram of bentonite, add bentonite through a 50-mesh sieve to a manganese chloride solution with a mass percentage concentration of 30%, stir in a constant temperature water bath at 50°C for 6 hours, and age 24h, then separate the precipitate from the liquid, wash the precipitate 3 times with deionized water, and dry to obtain the bentonite modified by potassium permanganate; take 1g of the dried manganese chloride modified bentonite, add it to 1.5 Add 0.6 mmol of sodium bisulfite to the wastewater of Golden Orange II to be treated, stir for 20 minutes, then add 2 g of hydrotalcite, the organic matter is decomposed, precipitated and separated, the removal rate is 97.6%, and the supernatant can be discharged.

Embodiment 2

[0018] Using calcium-based bentonite, according to the amount of 0.5 mmol of manganese chloride per gram of bentonite, add bentonite that has passed through a 20-mesh sieve into a manganese chloride solution with a concentration of 15% by mass, stir in a constant temperature water bath at 40°C for 5 hours, and age 12h, then separate the precipitate from the liquid, wash the precipitate twice with deionized water, and dry to obtain potassium permanganate modified bentonite; take 1g of dried manganese chloride modified bentonite, add to 1L Add 0.2mmol sodium bisulfite to the phenol wastewater to be treated, stir for 10 minutes, and then add 1g hydrotalcite, the organic matter is decomposed, precipitated and separated, the removal rate is 98.5%, and the supernatant can be discharged.

Embodiment 3

[0020] Using sodium-based bentonite, according to the amount of 0.8mmol manganese chloride per gram of bentonite, add bentonite through a 30-mesh sieve to a manganese chloride solution with a mass percentage concentration of 30%, stir in a constant temperature water bath at 50°C for 6h, and age 24h, then separate the precipitate from the liquid, wash the precipitate 3 times with deionized water, and dry to obtain the bentonite modified by potassium permanganate; take 1g of the dried manganese chloride modified bentonite, add it to 1.5 Add 0.5mmol of sodium bisulfite to the wastewater of Golden Orange II to be treated, stir for 20min, then add 2g of hydrotalcite, the organic matter is decomposed, precipitated and separated, the removal rate is 97.9%, and the supernatant can be discharged.

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PUM

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Abstract

The invention discloses a method for treating organic wastewater by modified bentonite. The method comprises the following sequential steps: 1) calcium bentonite or sodium bentonite is adopted, in terms of correspondence of each gram of bentonite to 0.5-1.0 mmol of manganese chloride bentonite sieved by a 20-50-mesh sieve is added to a manganese chloride solution with the mass percent concentration of 15%-30%, the mixture is stirred in a water bath with the constant temperature of 40-50 DEG C for 5-6 h and aged for 12-24 h, then a precipitate is separated from the liquid, washed with deionized water twice or three times and dried, and potassium permanganate modified bentonite is obtained; 1 g of the dried manganese chloride modified bentonite is taken and added to 1-1.5 L of to-be-treated organic wastewater, then 0.2-0.6 mmol of sodium bisulfite is added, the mixture is stirred for 10-20 min, 1-2 g of hydrotalcite is added, organic matters are decomposed, the precipitate is separated, and a supernatant can be drained. The method is seldom affected by the pH of the wastewater, and secondary pollution is avoided after treatment.

Description

technical field [0001] The invention relates to the development of new technologies for environmental pollution control, in particular to a method for treating organic waste water with modified bentonite. Background technique [0002] With the rapid development of industry, the types and quantities of wastewater have increased rapidly, and the pollution of water bodies has become increasingly widespread and serious, threatening human health and safety. Since the composition of industrial organic wastewater is more complex, and some are toxic, industrial organic wastewater treatment is more difficult and more important than urban sewage treatment. [0003] In the high-concentration organic wastewater produced by industry, there are many acids and bases, often with strong acid or strong alkali. The main hazards are as follows: First, aerobic hazard: due to biodegradation, high-concentration organic wastewater will make the receiving water anoxic or even anaerobic, and most aq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/58C02F1/72
CPCC02F1/281C02F1/72C02F2101/30C02F2101/308C02F2101/345C02F2305/00
Inventor 张宇马建锋赵文昌
Owner 江苏升和环保科技有限公司
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