Method for treating manganese-containing wastewater generated during electrolytic manganese processing

A waste water treatment, electrolytic manganese technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc., can solve environmental pollution, high treatment cost, low economy and other issues to achieve the effect of reducing cost, low processing cost and reducing pollution

CN102115284AInactive Publication Date: 2011-07-06重庆武陵锰业有限公司
1 Cites 20 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2011-07-06
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses a method for treating manganese-containing wastewater generated during electrolytic manganese processing. The method comprises the following steps of: firstly, pretreating manganese-containing wastewater; adding sodium hydroxide to adjust the pH value to be 9.3+0.10; adding carbonate capable of undergoing a displacement reaction with Mn<2+> to generate a MnCO3 sediment; then, adding a flocculant and fully stirring, wherein the addition amount of the flocculant is 0.12-0.35 percent of the wastewater amount; leading the wastewater to enter a primary sedimentation tank, standing still, sedimenting MnCO3 and separating the MnCO3 from liquid; then, adding sodium hydroxide to adjust the pH value to 9.7+0.10; adding perhydrol and the flocculant; and leading the wastewater enter a secondary sedimentation tank and standing still to generate a Mn(OH)2 sediment; and adding an acid or alkali substance to adjust the pH value of the Mn(OH)2 sediment so that related indexes can reach an emission standard. The method disclosed by the invention is a production type treatment method for resource recycling, can be used for recycling manganese resources, has lower treatment cost and is beneficial to decrease of the costs of enterprises for treating the manganese-containing wastewater.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a treatment method for manganese-containing wastewater produced in the electrolytic manganese processing process, in particular to a treatment method for manganese resource recycling of the manganese-containing wastewater produced in the electrolytic manganese processing process. Background technique

[0002] The electrolytic manganese plant will produce a large amount of metallic manganese (mainly Mn 2+ ) waste water, which mainly comes from electrolyte, circulating cooling water, ground washing water and equipment washing water, etc. After recycling these waste water, some waste water with relatively high manganese concentration will flow out of the production line for discharge, thus forming manganese-containing waste water that needs to be treated urgently . In addition, seepage water from the slag field is also a source of manganese-containing wastewater that cannot be ignored. At present, the moisture content of manganes...

Examples

Embodiment Construction

[0020] Such as figure 1 Among them, the manganese-containing wastewater treatment method of electrolytic manganese processing of the present invention comprises the following steps:

[0021] 1. Collect manganese-containing wastewater and merge it into the waste water pool, and pretreat the manganese-containing waste water in the waste water pool to intercept and remove suspended matter and floating matter in the waste water, and reduce the operating cost of the sewage treatment system; it can also be routinely treated The water quality and quantity of wastewater are adjusted to reduce the impact load of water quality and quantity on subsequent treatment facilities.

[0022] 2. Put the manganese-containing wastewater in the wastewater pool into the primary coagulation reaction tank, and use sodium hydroxide to adjust the pH value to 9.3 + 0.10, delivery energy and Mn 2+ Carbonate for replacement reaction, the amount of carbonate added is 1.5-2.8 times the manganese content i...