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A method for treating organic chemical wastewater

A technology for chemical wastewater and wastewater, applied in chemical instruments and methods, water/sewage treatment, aerobic process treatment, etc., can solve the problems of high wastewater treatment process requirements and high treatment costs, and achieve faster biological reaction speed, economical and efficient treatment. , good stability

Active Publication Date: 2021-12-10
兰州大学白银产业技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This treatment method has high requirements on wastewater treatment process and high treatment cost

Method used

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  • A method for treating organic chemical wastewater
  • A method for treating organic chemical wastewater
  • A method for treating organic chemical wastewater

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0066] Preparation of microbial culture medium

[0067] The dried flour, blood meal and bone meal are mixed according to the mass fraction of 60% flour, 30% blood meal and 10% bone meal, and sieved to control the particle size below 0.1mm.

[0068] The activated carbon fiber is processed to 2-4mm, soaked in 60-68% nitric acid solution for 2-4 hours, washed with distilled water until neutral, and dried at 100°C to obtain the modified activated carbon fiber.

[0069] Preparation of Polyurethane Bioactive Carrier A

[0070] Component ①: Polyether 330: 70-75 parts

[0071] Microbial culture medium 1.0~2.0 parts

[0072] After mixing the above raw materials in sequence, stir mechanically at 20°C for 10 minutes to obtain component ①.

[0073] Component ②: 25-30 parts of toluene diisocyanate

[0074] Modified activated carbon fiber 2.0~5.0 parts

[0075] After mixing the above raw materials in sequence, stir mechanically at 20°C for 10 minutes to obtain component ②.

[0076] ...

Embodiment 1

[0102] Add polyurethane bioactive carrier A and anaerobic microorganisms into the anaerobic reactor, and after 2 months of starting, the COD cr 30000mg / L, NH 4 + -N is 200mg / L Thymopentin processing and production wastewater is adjusted to neutral during the adjustment, the production wastewater after adjustment and homogenization enters the anaerobic reactor, reacts at 40°C for 72h, and measures the COD of the effluent cr 800mg / L, NH 4 + -N is 150mg / L. At this step, COD cr The removal rate is 97.33%, NH 4 + -N removal rate was 25%.

[0103] The water quality treated in the anaerobic reactor is re-entered into the aerobic reactor, and immobilized microbial carrier A and microorganism B350 (BIO-SYSTEM, USA) are added to the aerobic reactor, and reacted at 30°C for 24h , measured water COD cr 100mg / L, NH 4 + -N is 20mg / L. At this step, COD cr The removal rate is 87.5%, NH 4 + -N removal rate is 86.67%.

[0104]The water quality after the treatment in the aerobic ...

Embodiment 2

[0107] Add polyurethane bioactive carrier B into the anaerobic reactor, add polyurethane bioactive carrier A and anaerobic microorganisms into the anaerobic reactor, and after 2 months of starting, the COD cr 30000mg / L, NH 4 + -N is 200mg / L Thymopentin processing and production wastewater is adjusted to neutral during the adjustment, the production wastewater after adjustment and homogenization enters the anaerobic reactor, reacts at 40°C for 72h, and measures the COD of the effluent cr 1200mg / L, NH 4 + -N is 150mg / L. At this step, COD cr The removal rate is 96%, NH 4 + -N removal rate was 25%.

[0108] The water quality treated in the anaerobic reactor is re-entered into the aerobic reactor, and immobilized microbial carrier A and microorganism B350 (BIO-SYSTEM, USA) are added to the aerobic reactor, and reacted at 30°C for 24h , measured water COD cr 500mg / L, NH 4 + -N is 100mg / L. At this step, COD cr The removal rate was 58.33%, NH 4 + -N removal rate was 30%...

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Abstract

The invention provides a method for treating organic waste water, comprising step S1, adjusting the pH value of the waste water to 6-8; step S2, contacting the waste water treated in step S1 with a polyurethane bioactive carrier to perform the first reaction; step S3, contacting the wastewater treated in step S2 with an immobilized microbial carrier to perform a second reaction; step S4, contacting the wastewater treated in step S3 with a heterogeneous Fenton catalyst and an oxidant to perform a third reaction. This method first adopts the immobilization technology of microorganisms to increase the microbial content per unit volume and speed up the biological reaction speed. Finally, heterogeneous catalytic oxidation is used to further catalyze and oxidize the refractory organic matter that cannot be processed in the immobilization stage of microorganisms, making the system The effluent meets the discharge standard.

Description

technical field [0001] The invention relates to a method for treating organic chemical wastewater. Background technique [0002] High-concentration organic chemical wastewater produced during the production of synthetic drugs such as thymopentin, and its wastewater COD cr The concentration is as high as 40000mg / L, and the wastewater contains a large amount of methanol, acetonitrile and a small amount of amino acid. Among them, the content of methanol and acetonitrile is far greater than the concentration tolerated by free organisms, and has a strong inhibitory effect on common microorganisms. [0003] CN103253831A discloses a heterogeneous catalytic Fenton reagent oxidation fluidized bed-anaerobic biological fluidized bed advanced treatment coking wastewater system, which can realize economical and efficient treatment of coking wastewater, and the treated sewage can meet the discharge standard. However, this technology has complex treatment devices, high process costs, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F9/00C02F3/02C02F1/66C02F1/722C02F1/725C02F3/34C02F3/2806C02F2101/30C02F2305/026
Inventor 周林成丁伟军刘德胜白彪勇陈凤娟丁维东朱军龙
Owner 兰州大学白银产业技术研究院
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