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Pigment sludge treatment method

A treatment method and pigment technology, applied in biological sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve low anaerobic digestion efficiency, poor passivation efficiency, and difficult degradation of pigment sludge High organic content and other problems, to achieve the effect of reducing bioavailability, avoiding over-acidification, and reducing the risk of secondary pollution

Active Publication Date: 2022-05-13
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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AI Technical Summary

Problems solved by technology

In addition, after anaerobic digestion of pigment sludge, the suspension has extremely high chroma, which increases the difficulty and cost of subsequent sewage treatment
[0003] Anaerobic digestion is one of the commonly used technologies for treating refractory organic solid waste. It can not only generate methane as a clean energy source, but pigment sludge has high refractory organic content, resulting in low anaerobic digestion efficiency.
Biochar can be used as a passivator for heavy metals, but it only has a strong adsorption capacity for the ion-exchange state of heavy metals, so the passivation efficiency is not good
Pigment sludge anaerobic digestion suspension has high chroma, which increases the difficulty of subsequent sewage treatment process

Method used

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Embodiment 1

[0044] A treatment method for pigment sludge, comprising the steps of:

[0045] 1. Wash the peanut shells and dry them in an oven at 105° until the quality does not change. Crush the dried peanut shells and pass them through a 100-mesh sieve to obtain crushed peanut shells;

[0046] 2. Take 200g of powdered peanut shells, add 1L of 10% nitric acid solution, seal for 24 hours, oxidize to remove impurities in the peanut shells, rinse with deionized water until neutral, and dry in an oven at 105°C until the quality remains unchanged;

[0047] 3. Take the powdered peanut shell obtained in step 2, add 1L 5% ZnCl 2 The solution was activated, stirred magnetically for 24 hours, filtered, and dried in an oven at 105°C until the quality remained unchanged;

[0048] 4. Take the powdered peanut shells obtained in step 3, put them into an anaerobic muffle furnace at 600°C, and perform pyrolysis and carbonization for 4 hours to prepare peanut shell biochar, which is stored for later use; ...

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Abstract

The invention discloses a pigment sludge treatment method, and belongs to the pigment sludge resource utilization and stable treatment technology, peanut shell magnetic biochar is added into an anaerobic reactor, the mass fraction of the magnetic biochar is 3%, and anaerobic seed sludge and pigment sludge obtained through rapid filtration are placed in the anaerobic reactor. The addition ratio of the anaerobic seed sludge to the pigment sludge is 1: 3, and diluting until TS is 8%. The initial pH value of the anaerobic digestion reaction is adjusted to 7.2, nitrogen is introduced for 5 min to remove oxygen remaining in the reactor, pH adjustment is not carried out during the period, and the temperature is controlled to be 35 + / -1 DEG C; the treatment method can realize coupling of direct interspecific electron transfer effects of dual microorganisms of the biochar and the magnetite. According to the treatment method, recycling, stabilization, harmlessness and reduction of the pigment sludge can be realized.

Description

technical field [0001] The invention belongs to the field of solid waste treatment and resource utilization, in particular, the invention relates to a treatment method of pigment sludge. Background technique [0002] In recent years, art education has been included in the scope of quality education, and the number of art education and training institutions has increased significantly. At present, the number of art education and training institutions in the country has reached 6,000, and the number of art trainees is nearly 12 million every year, showing an increasing trend year by year. During the painting process of gouache, watercolor, acrylic paint, and oil painting, the paint wastewater produced can only be discharged into the natural environment or sewers, causing pipeline blockage or polluting natural water bodies. Environmental protection problems in the field of painting are becoming more and more serious. Nanjing Huishijie Environmental Protection Technology Co., Lt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F101/20C02F101/22C02F101/30
CPCC02F11/04C02F2101/308C02F2101/20C02F2101/22Y02E50/30
Inventor 阮仁俊余成龙王惠赵昌爽李祎多李永强许贤旺黄斌柯凡
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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