Multi-element internal electrolysis filler and preparation method thereof
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An internal electrolysis and multiple technology, which is applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc. High efficiency, improved COD removal, avoidance of clogging and scaling
Inactive Publication Date: 2013-08-21
苏州有色金属研究院有限公司
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However, there are still some limitations in the iron-carbon internal electrolysis process:
[0004] 1) The consumption of iron filings is large, and it is easy to harden after a period of use, which affects the treatment effect;
[0005] 2) The iron-carbon mixture is uneven, and the activated carbon is easy to lose;
[0006] 3) The treatment capacity for refractory wastewater is limited, usually only reaching 15-20%
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Embodiment 1
[0024] Mix 448g of iron shavings (bulk density 1.5g / ml), 44.8g of copper alloy shavings (bulk density 0.225g / ml), and 244g of activated carbon (bulk density 0.49 g / ml) to prepare multi-component internal electrolytic filler A.
[0025] Treat ultrafiltration membrane to prepare enterprise wastewater, the main component is dimethylacetamide, and the daily wastewater production is 56m 3 / d, COD3680~27600mg / L. Add the above-mentioned multi-component internal electrolytic filler A into the reactor, and the results after treatment with the multi-component internal electrolytic filler A are shown in the following table:
[0028] The washing sewage of dye intermediates and finished toner sewage of a chemical factory, the main components are dimethylformamide, dodecylamine polyoxyethylene ether, inorganic salts and volatile phenols. After water quality analysis, COD26300mg / L, total nitrogen 22.5mg / L, chromaticity 1000. After pretreatment with the multi-component internal electrolytic filler A in Example 1, the effluent COD is about 12000 mg / L, and the BOD / COD is increased from the initial 0.18 to 0.38, which provides feasibility for subsequent anaerobic biodegradation.
Embodiment 3
[0030] 152g of iron shavings, 93g of copper alloy shavings, and 260g of activated carbon were used to make multi-component internal electrolytic filler B.
[0031] Treat the spandex production wastewater of a spandex company, the raw water index is COD2000-3000 mg / L, ammonia nitrogen 50-60mg / L, pH4-5. The working condition of the internal electrolysis reaction is: the hydraulic retention time is 45min, the pH is 2.5, after pretreatment by the multi-component internal electrolysis filler B, the effluent COD510-740 mg / L, the BOD / COD is increased from the initial 0.23 to 0.58, after the internal electrolysis reaction The effluent only needs simple aerobic aeration biochemical treatment to meet the local sewage discharge standard (COD≤100 mg / L).
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Abstract
The invention relates to multi-element internal electrolysis filler and a preparation method thereof. The multi-element internal electrolysis comprises the following components of: 30-60% of iron scraps, 5-18% of copper alloy scraps and 35-52% of active carbon. A process comprises the following steps of: mixing the iron scraps and the copper alloy scraps according to a component ratio; firstly immersing by utilizing an alkaline solution to remove dust and oil on the surfaces of the iron scraps and the copper alloy scraps; repeatedly washing by using clean water; immersing by utilizing an acid solution to remove oxidized films and rusts on the surfaces of the iron scraps and the copper alloy scraps; repeatedly washing by using the clean water; adding the treated iron scraps and the treated copper alloy scraps into a reactor to be mixed uniformly; and adding active carbon grains, and agitating and shaking the reactor until the active carbon grains sufficiently enter gaps among the iron scraps and the copper alloy scraps to prepare the multi-element internal electrolysis filler. A copper alloy is added into the internal electrolysis filler according to a specific ratio to generate multi-element internal electrolysis reaction in the reactor, so as to accelerate organic materials to be degraded. In an pre-treatment application of wastewater, the capability of treating pollutants which are difficult to degrade by the filler is stronger than that the filler used in a conventional internal electrolysis process, and the reaction speed is higher.
Description
technical field [0001] The invention relates to a multi-component internal electrolytic filler for pretreatment of industrial wastewater and a preparation method thereof, belonging to the technical field of iron-carbon internal electrolytic wastewater treatment. Background technique [0002] With the rapid development of economic production, toxic, harmful and refractory organic pollutants that cause great pollution to the environment are inevitably released during the production process, such as phenols, anilines, polychlorinated biphenyls, polycyclic aromatic hydrocarbons, nitro Aromatic compounds, dyes, etc. These pollutants are complex in composition and have certain biological toxicity. Usually the BOD in this type of wastewater 5 / COD Cr Very low (<0.2), difficult to biodegrade directly. If conventional biochemical treatment is used, sludge autolysis is prone to occur, resulting in the failure of biochemical treatment. Therefore, this kind of wastewater must be p...
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