Pretreatment process of organic silicon wastewater

An organosilicon and pretreatment technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem that the iron-carbon micro-electrolysis treatment process cannot achieve the treatment effect and the treatment cost remains to be Reduction, limited redox capacity and other problems, to achieve the effect of improving biodegradability, reducing load, and convenient operation

Inactive Publication Date: 2011-04-06
蓝星环境工程有限公司
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AI-Extracted Technical Summary

Problems solved by technology

[0006] However, this method still has imperfections, so that the iron-carbon micro-electrolysis treatment process cannot achieve a better treatment effect, and the organic silicon wastewater is treated by the micro-electrolysis process, although part of the CO...
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Abstract

The invention discloses a pretreatment process of organic silicon wastewater, comprising the steps of homogeneous treatment, slag removal, oil removal, iron-carbon micro-electrolysis process, Fenton process, neutralization deposition and overflow and discharge of supernate. Aiming at the strong acid characteristic of the organic silicon wastewater, the iron-carbon micro-electrolysis can be directly carried out after the homogeneous impurity removal; partial COD (Chemical Oxygen Demand) can be degraded while the biochemical quality of the wastewater is improved and the pH value is improved; then hydrogen peroxide is directly added to form a Fenton system; a strong oxidant is formed to damage the structure of organic matters and chromophonic groups in the wastewater and effectively oxidize so as to remove the organic matters which are difficult to degrade and cannot be removed by the traditional wastewater treatment technology, and thereby the aims of further reducing the COD and improving the biodegradability of the wastewater can be improved. The organic silicon wastewater can reach the national third-grade discharge standard after being subjected to neutralization and the precipitation and reach the national first-grade discharge standard after being subjected to biochemical treatment. The pretreatment process has the advantages of low cost and stable treatment effect and is simple for operation.

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  • Pretreatment process of organic silicon wastewater
  • Pretreatment process of organic silicon wastewater
  • Pretreatment process of organic silicon wastewater

Examples

  • Experimental program(1)

Example Embodiment

[0032] Example 1
[0033] The organic silicon wastewater of a certain organic silicon factory is used as the water to be treated, and the process of the invention is adopted for treatment. The specific process steps are as follows:
[0034] 1) Homogenization: Homogenize the organic silicon wastewater in the conditioning tank, with COD of 1626.01 mg/L, PH value of 1.1, and chloride ion (Cl-) concentration of 14988 mg/L;
[0035] 2) Slag removal and oil separation treatment: the homogenized organic silicon wastewater is treated with scum and oil removal to remove most of the visible scum and oil;
[0036] 3) Micro-electrolysis: The effluent from the slag removal and oil separation treatment is treated by iron-carbon micro-electrolysis process. The iron-carbon micro-electrolysis process adopts the filler type iron-carbon micro-electrolysis process. Among them, the filler (sold by Bluestar Environmental Engineering Co., Ltd. The combined micro-electrolysis filler): water (volume ratio) = 1:3, reacted for 1.5 hours under aeration conditions, the pH of the water after treatment was 3.93;
[0037] 4) Fenton oxidation: Add H2O2 to the effluent after micro-electrolysis for Fenton oxidation treatment, control the reaction time for 1.5h, and add 30% H2O2 to a mass fraction of 2%;
[0038] 5) Neutralization and precipitation: Neutralize the effluent from Fenton oxidation with 30% NaOH to a pH of 8.5-9.5, precipitate for 2 hours, and finally discharge the effluent or enter the biochemical unit for reprocessing.
[0039] 6) The water quality of organosilicon wastewater after this pretreatment process is shown in Table 1 below:
[0040] Table 1 Comparison of water quality indicators before and after organic silicon wastewater treatment
[0041]
[0042]
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