Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for treating acid mine wastewater through papermaking black liquid

A technology for mine acid wastewater and papermaking black liquor, applied in water/sewage treatment, anaerobic digestion treatment, mining wastewater treatment, etc., can solve the problems of high price, high production cost, and large amount of reagents

Inactive Publication Date: 2017-02-22
贵州筑信达创科技有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patent No. 201010589082.X "A Mine Wastewater Treatment Method" discloses a method for simultaneously treating mine acid wastewater and flotation wastewater. Large and expensive, leading to high production costs, and the method cannot control the reaction time, which leads to the inability to estimate the input in the reaction process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for treating acidic wastewater by using papermaking black liquor, the method is: after activating acidic wastewater and papermaking black liquor in a twin-shaft mixer for 10 hours, mixed waste is obtained, and at a constant temperature of 25°C, mix it with a starter After mixing evenly, transfer to an anaerobic reactor, seal and let stand for 24 hours to obtain metal sulfide and clear liquid.

[0019] The papermaking black liquor is black liquor produced in caustic soda pulping.

[0020] The COD value of the papermaking black liquor is 300mg / L.

[0021] The volume ratio of the acid waste water to the papermaking black liquor is 4:1.

[0022] The power of described twin-shaft mixer is 5kw.

[0023] The solid-to-liquid ratio of the starter and the mixed waste is 0.08.

[0024] The leavening agent is a mixture of yeast powder and yeast extract.

[0025] The weight of yeast powder and yeast extract in the starter is 1:1.

[0026] The microorganism culture medi...

Embodiment 2

[0028] A method for treating acidic wastewater by using papermaking black liquor, the method is as follows: after activating acidic wastewater and papermaking black liquor in a twin-shaft mixer for 3 hours, mixed waste is obtained, and at a constant temperature of 5°C, mix it with a starter After mixing evenly, transfer to an anaerobic reactor, seal and let stand for 36 hours to obtain metal sulfide and clear liquid.

[0029] The papermaking black liquor is black liquor produced in caustic soda pulping.

[0030] The COD value of the papermaking black liquor is 100mg / L.

[0031] The volume ratio of the acid waste water to the papermaking black liquor is 8:1.

[0032] The power of the two-shaft mixer is 3kw.

[0033] The solid-to-liquid ratio of the starter and the mixed waste is 0.13.

[0034] The leavening agent is a mixture of yeast powder, yeast extract powder and yeast extract.

[0035] The weight ratio of yeast powder, yeast extract powder and yeast extract in the star...

Embodiment 3

[0038] A method for treating acidic wastewater by using papermaking black liquor, the method is as follows: after activating acidic wastewater and papermaking black liquor in a twin-shaft mixer for 5 hours, mixed waste is obtained, and at a constant temperature of 15°C, mix it with a starter After mixing evenly, transfer to an anaerobic reactor, seal and let stand for 24 hours to obtain metal sulfide and clear liquid.

[0039] The papermaking black liquor is black liquor produced in caustic soda pulping.

[0040] The COD value of the papermaking black liquor is 400mg / L.

[0041] The volume ratio of the acid waste water to the papermaking black liquor is 0.2:1.

[0042] The power of the two-shaft mixer is 1.5kw.

[0043] The solid-to-liquid ratio of the starter and the mixed waste is 0.1.

[0044] The leavening agent is a mixture of yeast extract powder and yeast extract.

[0045] The weight ratio of yeast extract powder and yeast extract in the starter is 1:1.8.

[0046] ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
chemical oxygen demand (mass)aaaaaaaaaa
chemical oxygen demand (mass)aaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of wastewater treating, and particularly relates to a method for treating acid mine wastewater through papermaking black liquid. The method includes the steps that the acid wastewater and the papermaking black liquid are activated for 1 h to 8 h in a double-shaft mixer, and then a mixed waste material is obtained; under the condition of the steady temperature of 3 DEG C to 27 DEG C, the mixed waste material and a fermenting agent are mixed to be even, then the mixture is transferred into an anaerobic reactor and sealed to be standing for 12 h to 48 h, and then metal sulfide and clear liquid are obtained. The method has the advantages that the removing rate is high, recycling is easy, and the cost is low, and the removing effect on arsenic and copper is particularly prominent.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a method for treating mine acid waste water with papermaking black liquor. Background technique [0002] Mine acid wastewater has the characteristics of high acidity and heavy metals, so it has caused harm to the environment and organisms. The traditional method of treating mine acid wastewater is mainly neutralization precipitation method, which is simple to operate and produces gypsum by-product, but its energy consumption is high and the cost big. As one of the main wastes of paper mills, papermaking black liquor contains a large amount of organic pollutants and lignin, and its treatment is difficult. Usually, it is concentrated and sulfonated to make lignosulfonate, but this method can only Treat a small amount of black liquor. Based on this dual background, the present invention provides an idea of ​​treating waste with waste. [0003] Patent No....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/28C02F1/00C02F1/68C02F101/20C02F103/28C02F103/10
Inventor 袁再六
Owner 贵州筑信达创科技有限公司