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Carbonless copy paper coating wastewater treatment and recycling reusing method

A technology for carbonless copying paper and wastewater treatment, which is applied in the process of wastewater treatment, water/sewage treatment, oxidized water/sewage treatment, etc. Effect

Inactive Publication Date: 2019-01-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a novel treatment method aiming at the unsatisfactory current situation of conventional treatment methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this embodiment, a carbonless copy paper coating wastewater treatment and recycling method is used to treat carbonless copy paper coating wastewater, the CODcr of the wastewater is 3212 mg / L, the TSS value is 275 mg / L, and the chroma is 2660 C.U.

[0032] A carbonless copy paper coating wastewater treatment and recycling method is used to treat carbonless copy paper coating wastewater, comprising the following steps and process conditions:

[0033] (1) Sludge enhanced coagulation treatment process: under normal temperature conditions, 10 ml of sludge is added to 1 L of coating wastewater as a coagulation enhancer, and PAC and CPAM are sequentially added to the coating in a certain proportion. Mix and stir in wastewater, wherein the mass ratio of PAC and CPAM is 50:1, the dosage of PAC is 200 mg / L coating wastewater, the stirring speed is 200 r / min, and the stirring time is 5 min. The dosage is 4 mg / L, the stirring speed is 60 r / min, the stirring time is 10 min, and ...

Embodiment 2

[0041] In this embodiment, a carbonless copy paper coating wastewater treatment and recycling method is used to treat carbonless copy paper coating wastewater, the CODcr of the wastewater is 3212 mg / L, the TSS value is 275 mg / L, and the chroma is 2660 C.U.

[0042] A carbonless copy paper coating wastewater treatment and recycling method is used to treat carbonless copy paper coating wastewater, comprising the following steps and process conditions:

[0043] (1) Sludge enhanced coagulation treatment process: at room temperature, 10 ml of anaerobic sludge was added to 1L of coating wastewater as a coagulation enhancer, and PAC and CPAM were sequentially added to the coating in a certain proportion. Mix and stir in cloth wastewater, wherein the mass ratio of PAC and CPAM is 20:1, the dosage of PAC is 200 mg / L, the stirring speed is 200 r / min, the stirring time is 5 min, and the dosage of CPAM The dosage is 10 mg / L, the stirring speed is 60 r / min, the stirring time is 10 min, an...

Embodiment 3

[0050] In this embodiment, a carbonless copy paper coating wastewater treatment and recycling method is used to treat carbonless copy paper coating wastewater, the CODcr of the wastewater is 3212 mg / L, the TSS value is 275 mg / L, and the chroma is 2660 C.U.

[0051] A carbonless copy paper coating wastewater treatment and recycling method is used to treat carbonless copy paper coating wastewater, comprising the following steps and process conditions:

[0052] (1) Sludge enhanced coagulation treatment process: under normal temperature conditions, 10 mL of anaerobic sludge was added to 1 L of coating wastewater as a coagulation enhancer, and PAC and CPAM were sequentially added to the Mix and stir in the coating wastewater, wherein the mass ratio of PAC and CPAM is 50:1, the dosage of PAC is 250 mg / L, the stirring speed is 150 r / min, the stirring time is 6 min, the dosage of CPAM The dosage is 5 mg / L, the stirring speed is 30 r / min, the stirring time is 5 min, and the standing t...

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Abstract

The invention discloses a carbonless copy paper coating wastewater treatment and recycling reusing method. In the view of a current situation that a flocculation-biological treatment method treating carbonless carbon paper coating wastewater fails to meet a discharge standard and cannot reach a reusing standard, a sludge-enhanced flocculation-hydrolysis acidification-activated sludge method-catalysis ozone-nanofiltration membrane treatment process is proposed to enable the coating wastewater to reach the water reusing standard after being treated. The method includes the following steps of adding sludge, flocculant PAC (polyaluminum chloride) and CPAM (cationic polyacrylamide) successively to the wastewater, mixing, stirring, reacting, standing, making a supernatant be subjected to hydrolyzing, acidifing and activated sludge method treatment, and finally, treating a biological treatment effluent through catalytic ozone oxidation and a nanofiltration membrane, so that the effluent reaches the water reusing standard. The method has the advantages of simple process steps, strong operability, short processing time, high efficiency, low cost and the like, and the effluent reaches the sewage reusing standard.

Description

technical field [0001] The invention relates to the field of papermaking coating wastewater treatment, in particular to a carbonless copy paper coating wastewater treatment and recycling method. Background technique [0002] Coating wastewater mainly comes from the coating process of carbonless copy paper. In this production process, it is often necessary to add various pigments (clay, calcium carbonate, etc.), color developers (activated clay, salicylic acid, etc.), adhesives (cheese pigment, polyvinyl alcohol, etc.), coloring agents (microcapsules), adhesives (modified starch, polyvinyl alcohol, etc.), and other coatings (fluorescent agents, defoamers, etc.). The loss of these coatings during the production process makes the coating wastewater contain more refractory pollutants and a small amount of metal ions, so the coating wastewater is one of the more difficult industrial wastewater to treat. [0003] Judging from the current situation of the treatment of coating wast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/28
CPCC02F1/442C02F1/5236C02F1/56C02F1/725C02F1/78C02F3/30C02F9/00C02F2103/28
Inventor 雷利荣党中煦李友明
Owner SOUTH CHINA UNIV OF TECH