JPS54110649A - Microbic disposal of waste water resulting from production of paper pulp - Google Patents
Microbic disposal of waste water resulting from production of paper pulpInfo
- Publication number
- JPS54110649A JPS54110649A JP1644978A JP1644978A JPS54110649A JP S54110649 A JPS54110649 A JP S54110649A JP 1644978 A JP1644978 A JP 1644978A JP 1644978 A JP1644978 A JP 1644978A JP S54110649 A JPS54110649 A JP S54110649A
- Authority
- JP
- Japan
- Prior art keywords
- waste water
- microbic
- cod
- constituents
- disposal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To facilitate the microbic disposal of COD constituents, by raising the temperature of the constitutents in the presence of acid or alkali to change the properties of the constituents.
CONSTITUTION: The lignin contained in waste water resulting from the production of paper pulp is relatively easily removed by cohesive sedimentation or microbic treatment. However, the hemicellulose and starch contained in the waste water do not easily cohere and the percentage of microbic oxidation of the hemicellulose and starch is low. As for the disposal of waste water resulting from the reclamation of used paper, the BOD removal percentage is about 90% or more but the COD removal percentage is only about 40 to 50% in general. The present invention relates to a method of improving the COD removal percentage. The waste water containing the COD constituents is kept acid or alkaline at a temperature of not lower than 50°C for at least 30 minutes to facilitate the microbic decomposition of the COD constituents. Then, the waste water is mixed with untreated waste water from a different process. Thereafter, the mixture is separated into solid and liquid and the microbic disposal of the COD constituents is performed.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1644978A JPS54110649A (en) | 1978-02-17 | 1978-02-17 | Microbic disposal of waste water resulting from production of paper pulp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1644978A JPS54110649A (en) | 1978-02-17 | 1978-02-17 | Microbic disposal of waste water resulting from production of paper pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54110649A true JPS54110649A (en) | 1979-08-30 |
Family
ID=11916544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1644978A Pending JPS54110649A (en) | 1978-02-17 | 1978-02-17 | Microbic disposal of waste water resulting from production of paper pulp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54110649A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51136375A (en) * | 1975-05-21 | 1976-11-25 | Mitsubishi Heavy Ind Ltd | Treating method for fibrous waste material |
| JPS523260A (en) * | 1975-06-24 | 1977-01-11 | Nippon Suiko Kk | Pre-treatment method & apparatus for polluted water purification proce ss |
-
1978
- 1978-02-17 JP JP1644978A patent/JPS54110649A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51136375A (en) * | 1975-05-21 | 1976-11-25 | Mitsubishi Heavy Ind Ltd | Treating method for fibrous waste material |
| JPS523260A (en) * | 1975-06-24 | 1977-01-11 | Nippon Suiko Kk | Pre-treatment method & apparatus for polluted water purification proce ss |
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