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Method for treating waste water with high pH value, high sulfide content, high ammonia nitrogen content and high COD content

A treatment method and sulfide technology, which is applied in the field of high ammonia nitrogen, high sulfide, "high pH, ​​high COD" wastewater treatment, can solve the problems of biochemical system failure to start normally, poor flocculation and sedimentation effect, and effluent water quality exceeding the standard, etc. Achieve the effects of good indicators, improve settlement performance, and reduce environmental pollution

Inactive Publication Date: 2010-04-14
HUNAN HERMES SAFE ENVIRONMENT PROTECTION SCI
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Problems solved by technology

Conventional treatment methods cannot achieve the expected treatment goals, so wastewater treatment facilities are often paralyzed due to poor flocculation and sedimentation effects, biochemical systems cannot be started normally, and effluent water quality exceeds the standard

Method used

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  • Method for treating waste water with high pH value, high sulfide content, high ammonia nitrogen content and high COD content
  • Method for treating waste water with high pH value, high sulfide content, high ammonia nitrogen content and high COD content
  • Method for treating waste water with high pH value, high sulfide content, high ammonia nitrogen content and high COD content

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Embodiment

[0028] After the wastewater from each mineral processing chemical workshop is collected and adjusted to be homogenized, it forms the comprehensive wastewater of the mineral processing chemical plant. The waste water is pretreated first, and the pretreatment adopts the acidification-ferrous salt precipitation method, and the amount of ferrous salt is 0.7kg / m 3 , sulfuric acid 2.21kg / m 3 , alum 0.3kg / m 3 . The ferrous salt precipitation section can remove the S in the wastewater 2- The COD caused by the acidification process also decomposes the organic matter hydrolyzed by acidification in the wastewater to remove part of the COD. The pretreatment COD removal rate is about 61.05%, the sulfide removal rate is 52.85%, and the ammonia nitrogen removal rate is 27.31%.

[0029] After the pretreatment wastewater is precipitated, carry out the biological treatment process. The biological treatment process adopts the hydrolytic acidification-autotrophic SBR process. The hydraulic ret...

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Abstract

The invention provides a method for treating waste water with high pH value, high sulfide content, high ammonia and nitrogen content and high COD content. The method comprises the following steps: firstly, pretreating the waste water by adopting acidification-malysite flocculation sedimentation to reduce the concentration of S2- in the waste water, eliminate the restraining function of the S2- to biological treatment, remove COD caused by the S2- and decompose substances which are easily acidized and decomposed in the waste water; secondly, carrying out biological treatment, wherein the biological treatment consists of processes of hydrolytic acidification and autotrophy SBR, organisms which are difficultly decomposed are decomposed in the hydrolytic acidification process to provide a carbon source for denitrification, oxygen is provided by aeration for the autotrophy SBR, the COD in the waste water is removed by using aerobic microorganisms, NaHCO3 is additionally added to adjust the pH value to ensure an optimal growth environment for autotrophy nitrobacteria, and ammonia and nitrogen are oxidized and removed by using oxygen and HCO32-; and finally, carrying out deep treatment by adopting flocculation sedimentation and -ClO2 oxidation to remove the color of the waste water and ensure that all indexes achieve the discharge standard.

Description

technical field [0001] The invention relates to the field of wastewater treatment and environmental protection, in particular to a method for treating "high pH, ​​high sulfide, high ammonia nitrogen, and high COD" wastewater. technical background [0002] my country is one of the countries with rich mineral resources in the world. By 2003, the total mineral resources identified accounted for about 12% of the world's total, and its potential value ranked third in the world. Among them, copper is 67.08 million tons, its reserves ranking tenth in the world; bauxite 2.55 billion tons, its reserves ranking ninth in the world; lead 37.57 million tons, its reserves ranking third in the world; zinc 92.67 million tons, its reserves Ranked third in the world; nickel 8.13 million tons, its reserves ranked ninth in the world; tungsten 5.69 million tons, antimony 2.07 million tons, rare earth 89.09 million tons, its reserves ranked first in the world; molybdenum 9.99 million tons, tin 81...

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Application Information

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IPC IPC(8): C02F9/14C02F1/66C02F3/12C02F1/52C02F1/76C02F101/16
CPCY02W10/10
Inventor 邓嫔吴兆清陈伟许国强应莉莉欧阳坤
Owner HUNAN HERMES SAFE ENVIRONMENT PROTECTION SCI
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