CN1915843A

CN1915843A - Method for processing organic wastewater

Info

Publication number: CN1915843A
Application number: CN 200610086276
Authority: CN
Inventors: 陈宜平
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-08-26
Filing date: 2006-08-26
Publication date: 2007-02-21
Anticipated expiration: 2026-08-26
Also published as: CN100457639C

Abstract

This invention discloses a method for treating organic wastewater. The method comprises: (1) introducing organic wastewater into a precipitation tank placed with vegetable oil dregs (1-5 wt.% of the organic wastewater) and traditional Chinese medicine dregs (2-5 wt.% of the organic wastewater); (2) adjusting pH to 2-6 with waste acid (waste sulfuric acid, waste phosphoric acid or waste hydrochloric acid) as the exciting agent, and precipitating for 20-480 min; (3) pumping the upper liquid into a precipitation tank placed with modified cinder for filtering, and discharging or recycling. The method uses waste dregs to treat organic wastewater, thus has such advantages as low cost, simple process and no secondary pollution.

Description

A kind of treatment process of organic waste water

Technical field

The present invention relates to sewage water treatment method, be specifically related to a kind of treatment process of organic waste water.

Background technology

Organic waste water contains other compositions such as volatile phenol, nitro thing, benzene, contains a part complexity, and toxicity is big, and turbidity is dark, and intractability is big, the cost height, and the secondary pollution after the processing is serious.The treatment process of taking at present has potassium bichromate extraction process, disinfection by chlorine dioxide method, zwitterion exchange process, cinder filtration method, modified clay absorption method etc., as 850 yuan of the phenanthroline per kilogram Renminbi that use in the potassium bichromate extraction process, dioxide peroxide handling per ton reaches 200 yuan of Renminbi, and the modified clay secondary pollution is serious.

Summary of the invention

The objective of the invention is to: a kind of treatment process of organic waste water is provided, utilizes industrial some waste residue that organic waste water is disperseed, adsorbs, flocculates, detoxifies, filters and make it reach emission standard, technology is simple, and is with low cost, non-secondary pollution.

Technical solution of the present invention is: this treatment process consists essentially of two steps, at first, puts vegetable oil residue and Chinese medicine slag and feed organic waste water in settling tank, and transferring pH value with spent acid as exciting agent is 2-6, precipitates 20-480 minute; Then, the supernatant liquid suction is equipped with the settling tank inner filtration of modified coal slag, and modified coal slag accounts for the 60-70% of settling tank volume, reaches the sewage disposal emission standard and promptly discharges or recycle, and wherein, this treatment process can be the repetition of above step.

Wherein, the weight of vegetable oil residue is the 1-5% that needs the organic waste water amount of processing, vegetable oil residue is sesame residues, vegetable seed slag, cottonseed slag, peanut dregs or the Semen Maydis grit etc. after plant sesame, vegetable seed, cottonseed, peanut, corn etc. squeeze grease, and vegetable oil residue also can be the slag after grease exploded food.

Wherein, the weight of Chinese medicine slag is the 2-5% that needs the organic waste water amount of processing, and Chinese medicine slag is the slag that forms in the antipyretic and antidotal type Chinese medicine production process, especially the slag of Herba Houttuyniae, the root bark of tree peony, the root of large-flowered skullcap, rheum officinale, the bark of official magnolia, Wild Chrysanthemum, Japanese Honeysuckle or SHUANGHUANLIAN.

Wherein exciting agent is sulfur waste acid, waste phosphoric acid or abraum salt acid.

Wherein, modified coal slag is formed by the waste coal slag modification that produces in the Industrial processes, at first the fragmentation of waste coal slag was mediated 10-20 minute less than 3mm, the coal tar that mixes weight 5-10%, pitch or bitumastic solution, be dried into water content 1-6% for temperature 80-120 ℃, immerse then in the saturation water of zinc chloride, 60 ℃ of dehydrations of water temperature, then temperature 300-800 ℃ carbonization under the secluding air condition; Wherein, modified coal slag also can be that the slag mud that the waste coal slag of 70-80% mixes in the used settling tank of 20-30% forms with the aforesaid method modification, and wherein, the waste coal slag can be flyash or flue dust.

The treatment agent that uses in the method for processing organic wastewater of the present invention is the waste residue that produces in the Industrial processes, and is with low cost, and technology is simple, and no secondary treatment is polluted.

Description of drawings

Fig. 1 is simple process figure of the present invention.

Among the figure: 1,2. settling tank, 3. organic waste water water inlet pipe, 4. rising pipe, 5. water shoot, 6. vegetable oil residue adds Chinese medicine slag, 7. modified coal slag, 8. filter screen.

Embodiment

This treatment process consists essentially of two steps, at first, puts vegetable oil residue and add Chinese medicine slag 6 back feeding organic waste waters in settling tank 1, and transferring pH value with spent acid as exciting agent is 2-6, precipitates 20-480 minute; Then, supernatant liquid is equipped with settling tank 2 inner filtrations of the band filter screen 8 of modified coal slag 7 through rising pipe 4 suction, modified coal slag 7 accounts for the 60-70% of settling tank volume, reaches the sewage disposal emission standard and promptly discharges or recycle, wherein, this treatment process can be the repetition of above step.

Wherein, the weight of vegetable oil residue is the 1-5% that needs the organic waste water amount of processing, vegetable oil residue is that plant sesame, vegetable seed, cottonseed, peanut, corn squeeze sesame residues, vegetable seed slag, cottonseed slag, peanut dregs or Semen Maydis grit behind the grease, and vegetable oil residue also can be the slag after grease exploded food.

Wherein, modified coal slag is formed by the waste coal slag modification that produces in the Industrial processes, at first the fragmentation of waste coal slag is less than 3mm, mixing coal tar, pitch or the bitumastic solution of weight 5-10% mediated 10-20 minute, be dried into water content 1-6% below temperature 80-120 ℃, immerse in the saturation water of zinc chloride 60 ℃ of dehydrations of water temperature, then temperature 300-800 ℃ carbonization under the secluding air condition then; Wherein, modified coal slag also can be that the slag mud that the waste coal slag of 70-80% mixes in the used settling tank of 20-30% forms with the aforesaid method modification; Wherein, the waste coal slag can be flyash, flue dust.

Example 1: now handle 50Kg organic waste water, at first, put in settling tank and feed 50kg organic waste water behind 0.5kg vegetable oil residue and the 1.0kg Chinese medicine slag, transferring pH value with sulfur waste acid as exciting agent is 2, precipitates 20 minutes; Then, the supernatant liquid suction is equipped with the settling tank inner filtration of modified coal slag, and modified coal slag accounts for 60% of settling tank volume, reaches the sewage disposal emission standard and promptly discharges or recycle.

Example 2: now handle 50kg organic waste water, at first, put in settling tank and feed 50kg organic waste water behind 1.5kg vegetable oil residue and the 1.75kg Chinese medicine slag, transferring pH value with waste phosphoric acid as exciting agent is 4, precipitates 150 minutes; Then, the supernatant liquid suction is equipped with the settling tank inner filtration of modified coal slag, and modified coal slag accounts for 65% of settling tank volume, reaches the sewage disposal emission standard and promptly discharges or recycle.

Example 3: now handle 50kg organic waste water, at first, put in settling tank and feed 50kg organic waste water behind 2.5kg vegetable oil residue and the 2.5kg Chinese medicine slag, transferring pH value with abraum salt acid as exciting agent is 6, precipitates 480 minutes; Then, the supernatant liquid suction is equipped with the settling tank inner filtration of modified coal slag, and modified coal slag accounts for 70% of settling tank volume, or repeats above-mentioned existing treatment step and reach the sewage disposal emission standard and promptly discharge or recycle.

Claims

1. the treatment process of an organic waste water, it is characterized in that: this treatment process consists essentially of two steps, at first, feeds organic waste water put vegetable oil residue and Chinese medicine slag in settling tank after, and transferring pH value with spent acid as exciting agent is 2-6, precipitates 20-480 minute; Then, the supernatant liquid suction is equipped with the settling tank inner filtration of modified coal slag, and modified coal slag accounts for the 60-70% of settling tank volume, reaches the sewage disposal emission standard and promptly discharges or recycle, and wherein, this treatment process also can be the repetition of aforesaid method step.

2. the treatment process of a kind of organic waste water according to claim 1 is characterized in that: wherein, the weight of vegetable oil residue is the 1-5% of the organic waste water amount that needs to handle.

3. the treatment process of a kind of organic waste water according to claim 1 and 2 is characterized in that: vegetable oil residue is that plant sesame, vegetable seed, cottonseed, peanut, corn squeeze sesame residues, vegetable seed slag, cottonseed slag, peanut dregs or Semen Maydis grit behind the grease.

4. the treatment process of a kind of organic waste water according to claim 1 and 2, it is characterized in that: the plant slag also can be the slag after grease exploded food.

5. the treatment process of a kind of organic waste water according to claim 1 is characterized in that: wherein, the weight of Chinese medicine slag is the 2-5% of the organic waste water amount that needs to handle.

6. a kind of treatment process of organic waste water according to claim 1 or 5, it is characterized in that: Chinese medicine slag is the Chinese medicine slag that forms in the antipyretic and antidotal type Chinese medicine production process.

7. according to the treatment process of claim 1 or 6 described a kind of organic waste waters, it is characterized in that: Chinese medicine slag is the Chinese medicine slag of Herba Houttuyniae, the root bark of tree peony, the root of large-flowered skullcap, rheum officinale, the bark of official magnolia, Wild Chrysanthemum, Japanese Honeysuckle or SHUANGHUANLIAN especially.

8. the treatment process of a kind of organic waste water according to claim 1, it is characterized in that: wherein exciting agent is sulfur waste acid, waste phosphoric acid or abraum salt acid.

9. the treatment process of a kind of organic waste water according to claim 1, it is characterized in that: wherein, modified coal slag is formed by the waste coal slag modification that produces in the Industrial processes, at first the fragmentation of waste coal slag is less than 3mm, mix coal tar, pitch or the bitumastic solution of weight 5-10% and mediated 10-20 minute, be dried into water content 1-6% below temperature 80-120 ℃, immerse then in the saturation water of zinc chloride, 60 ℃ of dehydrations of water temperature, then temperature 300-800 ℃ carbonization under the secluding air condition; Wherein, the waste coal slag also can be flyash or flue dust.

10. the treatment process of a kind of organic waste water according to claim 9 is characterized in that: modified coal slag also can be that the slag mud that the waste coal slag of 70-80% mixes in the used settling tank of 20-30% forms with the aforesaid method modification.