Cellulose wastewater treatment technology
A treatment process and cellulose technology, applied in the field of cellulose wastewater treatment technology, can solve the problems of polluting the environment, need to be verified, and increase the treatment cost, and achieve the effects of reducing the treatment cost, improving the biodegradability, and being easy to realize.
Inactive Publication Date: 2017-10-20
ZHEJIANG QICAI ECO TECH CO LTD
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[0006] In the prior art, there are precedents of using the two together to treat wastewater. For example, the Chinese invention patent with the publication number CN 1636893 A discloses a method for treating wastewater by combining light-assisted Fenton reaction, flocculation and microbial degradation. For the treatment of high-concentration toxic organic wastewater, it first performs photo-assisted Fenton reaction, then adds flocculant for flocculation, and finally performs microbial degradation treatment. The combination of three technologies can achieve a COD removal rate of more than 76.2% for toxic organic wastewater , but the effect of using it to treat cellulose wastewater has yet to be verified, and a large amount of iron salt waste sludge by-products will be produced during the treatment process, which increases the treatment cost and pollutes the environment
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[0034] Below in conjunction with specific embodiment the present invention is described in further detail:
[0035] The process parameters involved in embodiments 1 to 6 are shown in Table 1, wherein the waste water of embodiments 1-4 is hydroxypropyl methylcellulose production waste water, the waste water of embodiment 5 is methyl cellulose production waste water, and the waste water of embodiment 6 is hydroxypropyl methylcellulose production waste water. The waste water is hydroxyethyl cellulose waste water.
[0036] Table 1 The process parameters of the treatment process of cellulose wastewater described in Examples 1 to 6
[0037]
[0038] The treatment effect of waste water in embodiment 1~6 is shown in Table 2:
[0039] The treatment effect parameter of the treatment process of the waste water described in table 2 embodiment 1~6
[0040]
[0041] As can be seen from Table 2, in addition to taking out the large suspended particles visible to the naked eye, the pre...
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The invention discloses a cellulose wastewater treatment technology and relates to the technical field of wastewater treatment. The cellulose wastewater treatment technology comprises the following steps: (1) primary quality regulation: regulating a pH value of wastewater to 2-5; (2) illumination oxidization: adding an oxidant in the wastewater subjected to primary quality regulation, and performing illumination oxidization treatment with the treatment time being 0.5-10h; (3) secondary quality regulation: regulating a pH value of the wastewater subjected to illumination oxidization to 6-8; and (4) biochemical treatment: performing biological oxidization treatment on the wastewater subjected to secondary quality regulation. The technology can still reach relatively high COD removal rate without adopting a ferrous ion catalyst in illumination oxidization reaction and solves the problems of production and treatment of by-products of iron salt mud.
Description
technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment process for cellulose wastewater. Background technique [0002] In the production process of cellulose ether, it is first necessary to add excess alkali for etherification, and then it is necessary to add acid for neutralization. During the acid-base neutralization process, a solution containing a large amount of sodium salt will be produced. And part of the cellulose that has not been replenished together constitutes a very characteristic cellulose wastewater. Its COD content can be as high as 8000 mg / L or more. It is a high-salt concentration and refractory wastewater. Its treatment has always been the industry headaches for people. [0003] Among the existing wastewater treatment methods, photo-Fenton catalysis and biological treatment are the treatment schemes that are being researched by cutting-edge science and are suitable for refractory wastewate...
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IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/001C02F1/048C02F1/32C02F1/447C02F1/4693C02F1/66C02F1/722C02F3/02C02F2301/08
Inventor 陈志挺吕伏建李晓伟
Owner ZHEJIANG QICAI ECO TECH CO LTD