Coking waste water treatment method and A / O technology apparatus

A technology for coking wastewater and treatment methods, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. problems, to improve the biological denitrification capacity and effect, the effect of complete cracking is good, and the effect of improving the treatment effect is achieved.

Inactive Publication Date: 2012-04-18
江苏新纯江环保工程有限公司
View PDF12 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the above-mentioned prior art adopts different processes to treat coking wastewater and has certain effects, there are still some deficiencies, such as iron/carbon micro-electrolysis for the degradation of refractory organic matter, and micro-electrolysis itself has insurmountable shortcomings, such as iron bed The effect of micro-electrolysis is good at the beginning, but after running for a period of time, such as 7-15 days, the electrolysis effect is greatly reduced after the filler carbon is adsorbed, and it is easy to form channeling, and the cracking of some refractory organic substances is not thorough enough, so The actual effect of iron/carbon micro-electrolysis is unstable and difficult to degrade completely; micro-electrolysis has no effect on the removal of heavy metal ions in wastewater, and the presence of heavy metal ions will affect the improvement of microbial activity in subsequent biological treatment, which is also a factor affecting the treatment effect
Secondly, A/O, A 2

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coking waste water treatment method and A / O technology apparatus
  • Coking waste water treatment method and A / O technology apparatus
  • Coking waste water treatment method and A / O technology apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: A certain coking wastewater: COD=8000mg / l, NH3 -N=450mg / l, color=350 times; SS=120mg / l; oil=25mg / l. The treatment is carried out in sequence according to the pretreatment of physical and chemical oil removal, suspended solids, etc. → electrode energization, aerobic strong electrolysis, anaerobic biological hydrolysis acidification, and biological oxidation in the same pool, nitrification-denitrification (A / O).

[0030] First, adjust the pH of coking wastewater to 6.5-7.5, add polyaluminum chloride flocculant at a concentration of 6ppm and mix evenly, and send it to the integrated air flotation device 1 to separate light and heavy oil and suspended solids. The effluent COD=7800mg / l, NH 3 -N=450mg / l, chroma=320 times, SS=60mg / l, oil=0.5mg / l. Then enter the multi-electrode aerobic strong electrolytic cell 5 (aeration soda water ratio 5:1), voltage U=18V, current I=67A, after electrolysis for 2 hours, COD=4800mg / l, NH 3 -N=380mg / l, chromaticity=120 times, SS=360...

Embodiment 2

[0035] Example 2: A certain coking wastewater, COD=7500mg / l, NH 3 -N=350mg / l, chromaticity=350 times, SS=120mg / l, oils=25 mg / l; treatment process and used device are as embodiment 1.

[0036] Integrated air flotation device 1 treats effluent; COD=6700mg / l, NH 3 -N=300mg / l, chromaticity=320 times, SS=60mg / l, oil=0.5mg / l; treated water after aerobic strong electrolysis (steam water ratio 5:1, voltage U=18V, current I= 67A, electrolysis time 2 hours); COD=4200mg / l, NH 3 -N=280mg / l, chromaticity=120 times, SS=360mg / l, water after precipitation: COD=4200mg / l, NH 3 -N=280mg / l, chromaticity=120 times, SS=80mg / l; effluent after hydrolysis and acidification treatment for 18 hours: COD=2600 mg / l, NH 3 -N=210 mg / l, chromaticity=80 times, SS=60 mg / l; biological oxidation, nitrification-denitrification tank treatment in the same tank (aeration for 2 hours, forced circulation for 1.5 hours, static sedimentation for 30 minutes, decanting , add 25% NaOH3ppm, glucose 2ppm) during aeration)...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention is an improvement of a coking waste water treatment method. The method comprises steps of oil removal, impurity removal, electrolytic disintegration and A / O technology, and is characterized in that a biological hydrolysis acidification is set after electrolytic disintegration and before A / O technology; the electrolytic disintegration is electrode energizing aerobic strong electrolysis; the A / O technology employs butterfly jet aerators that are arranged in large intervals and have circulating pumps; the waste water is treated with aeration, aeration stopping and forced internal circulation, stationary deposition and water draining period processing successively, so as to realize biological oxidation and nitration-denitrification in a same pool. Cooperative effects and coordination of each technology increase treatment effect, and treated outlet water can stably reach COD no more than 100mg / l and NH3-N no more than 15 mg / l; besides, land occupation is saved undera same treating capacity and is only 80% of that of a common technology; operating cost of per ton of water is low; and a treatment effect is stable.

Description

technical field [0001] The present invention is an improvement of the treatment method of coking wastewater, especially relates to a treatment of COD and NH 3 -N can reach the standard at the same time, and it is a coking wastewater treatment method with low treatment cost. Background technique [0002] Coking wastewater has a wide variety of pollutants and complex components, such as benzene, phenols, sulfides, cyanides, naphthalene, anthracene and other polycyclic aromatic hydrocarbons, heterocyclic compounds and other refractory organic substances, and contains high ammonia and phenolic compounds. (Phenolic compounds account for more than half of the total organic pollution) and a large amount of organic nitrogen, CN, SVN, sulfide, tar and other oily substances. The water quality varies greatly, and the biodegradability is poor. Inorganic pollutants such as substances and ammonium salts are highly toxic. It is a typical industrial wastewater with complex pollutants, man...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F9/14C02F3/30
Inventor 张顺生钱一军周朝晖
Owner 江苏新纯江环保工程有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap