Process for treating papermaking waste liquid of vapor blasting straw pulping

A technology of pulping, papermaking and straw, which is applied in the field of treating waste liquid from pulping and papermaking of steam explosion straw, can solve the problems of no better treatment methods, etc., and achieve the effect of full utilization of resources

Inactive Publication Date: 2006-06-28
山东丰源中科生态科技有限公司
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Therefore, there is currentl

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  • Process for treating papermaking waste liquid of vapor blasting straw pulping

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[0028] The professional terms described in the present invention are explained as follows:

[0029] Aerobic: There is dissolved oxygen in the water.

[0030] Anaerobic: No oxygen is present.

[0031] BOD (Biological Oxygen Demand): The amount of oxygen required by bacteria to oxidize organic pollutants in wastewater; unit: mgO 2 / l.

[0032] COD (Chemical Oxygen Demand): The amount of oxygen required to oxidize organic pollutants in wastewater.

[0033] BOD / COD ratio: This ratio indicates the biodegradability of wastewater. The ratio of wastewater with good biodegradability is between 0.5 and 0.9.

[0034] The technical scheme of the present invention is as follows:

[0035] Treatment objects: steam explosion straw pulp extract, papermaking mid-stage water.

[0036] This treatment method is mainly divided into pretreatment process, anaerobic process, aerobic process and advanced treatment process.

[0037] Pretreatment process: First, the papermaking mid-stage water (chemical oxyg...

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Abstract

A process for treating the sewage generated in preparing paper pulp by steam explosion of straw and stalk includes such steps as filling the middle-stage paper-making sewage in regulating pool, pumping the sewage into super-effect shallow air-floating unit, adding aluminum polychloride and polyacrylamide, flocculating-air floating, reusing the most of the treated sewage, mixing the rest with extracted steam explosion liquid, acidifying, adding N and P, anaerobic reaction, aerobic treating to remove residual organic pollutant and oxidizing odor substance, reusing part of water, air floating of the rest, and oxidizing. Its by-products are organic fertilizer and marsh gas.

Description

technical field [0001] The invention relates to a pulping sewage treatment method, in particular to a sewage treatment method matched with the production process of steam explosion pulping and papermaking, that is, a method for treating waste liquid from steam explosion straw pulping and papermaking. Background technique [0002] Compounds in pulp and paper industry effluents originate from pulping raw materials and chemicals added during processing. Because there are many types of papermaking industry processes, the main and auxiliary raw materials used are very different, and the product structure is different, which may lead to great differences in water quality and quantity. Generally, the black liquor produced by ordinary pulping methods contains two types of substances, organic matter and inorganic matter. The organic matter mainly includes alkali lignin, hemicellulose and cellulose degradation products; most of the inorganic matter is various...

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Application Information

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IPC IPC(8): C02F1/52C02F1/24C02F1/66C02F3/02C02F3/28C02F103/28
CPCY02E50/30Y02W10/10Y02W10/33Y02W10/37
Inventor 陶志远郁永和孙中国郜金山刘剑孙启峰郁全丰杜娟
Owner 山东丰源中科生态科技有限公司
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