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Domestication of activated sludge with glucose as co-substrate and its application in advanced treatment of coking wastewater

A technology of coking wastewater and activated sludge, which is applied in water/sludge/sewage treatment, biological water/sewage treatment, special compound water treatment, etc., can solve the problems of lack of coking wastewater engineering application research and improve adaptability and degradation efficiency, enhanced co-metabolism, and the effect of saving operating costs

Active Publication Date: 2022-03-25
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the engineering application research on the advanced treatment of coking wastewater by microbial co-metabolism is still relatively scarce

Method used

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  • Domestication of activated sludge with glucose as co-substrate and its application in advanced treatment of coking wastewater
  • Domestication of activated sludge with glucose as co-substrate and its application in advanced treatment of coking wastewater
  • Domestication of activated sludge with glucose as co-substrate and its application in advanced treatment of coking wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this example, the effective volume of the SBR is 3L, the COD of the influent into the reactor is about 210mg / L, the ammonia nitrogen in the influent is 4.3mg / L, the temperature is 20.1-21.5°C, the MLSS is 3500±150mg / L, and the pH is 8.45 ~8.86, DO is 3.0±0.5mg / L.

[0027] In this embodiment, the domestication process of the activated sludge in the SBR system is as follows:

[0028] 1) The amount of sludge inoculum is 4500mg / L. Add 10% concentration of coking wastewater into the SBR, and replace the remaining volume with deionized water to make the effective volume of the reactor reach 3L.

[0029] 2) Turn on the rotameter, aerate the SBR, and maintain the dissolved oxygen of the mixed solution in the pool at 2.5-3.5mg / L, the temperature at 21.3-22.6°C, and the pH at 8.45-8.86.

[0030] 3) Turn on the coking wastewater inlet pump, the initial coking wastewater inlet volume is 300mL, and the remaining volume is replenished with deionized water.

[0031] 4) According ...

Embodiment 2

[0041] In this implementation case, the effective volume of the SBR is 3L, the COD of the influent into the reactor is 254mg / L, the ammonia nitrogen in the influent is 4.5mg / L, the temperature is 20.9~22.5℃, the MLSS is 6500±150mg / L, and the pH is 8.64~ 8.79, DO is 3.0±0.5mg / L.

[0042] 1) The amount of sludge inoculum MLSS is 6000mg / L, and the effluent from the secondary sedimentation tank after the anoxic-aerobic biological treatment of the coking wastewater treatment plant is added to the SBR to make the effective volume of the reactor reach 2.5L.

[0043] 2) Turn on the rotameter, aerate the SBR, maintain the dissolved oxygen of the mixed solution in the pool at 2.5-3.5mg / L, the temperature at 20.9-22.5°C, and the pH at 8.64-8.79.

[0044] 3) Turn on the coking wastewater inlet pump, and feed the reactor with an effective volume of 2.5 L at a flow rate of 300 mL / min.

[0045] 4) With glucose concentrations of 200mg / L and 400mg / L as the standard, record them as the low-car...

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Abstract

A method for domesticating activated sludge capable of advanced treatment of coking wastewater with glucose as a co-substrate. The activated sludge is taken and aerated to restore its activity. The SBR process is used to add microbial growth substrates to the reactor, and Add coking waste water in the proportion of 10% of the effective volume of the reactor, and supplement the remaining space with deionized water. The residence time of each gradient is 12 days, and every 72 hours is an operation cycle, so that the DO of the SBR is controlled at 3.0±0.5mg / L. The water temperature is 20.1-21.5°C, the pH value is 8.45-8.86, the sludge age is 25-30 days, and the drainage ratio of each cycle is 60%; when the suspended solid concentration of the mixed liquor reaches 3500±150mg / L, the sedimentation ratio of the mixed liquor sludge is 15~ 20%, and then gradually increase the dosage of coking wastewater according to the proportion of 10% of the effective volume, and carry out the acclimation of the next gradient. The invention is short in time, low in cost, and can deeply treat coking wastewater.

Description

technical field [0001] The invention belongs to the technical field of coking wastewater treatment, and in particular relates to an application of domesticated activated sludge using glucose as a co-substrate and advanced treatment of coking wastewater. Background technique [0002] Coking wastewater is a typical industrial wastewater produced in the process of coal coking, gas purification, coke recovery, and coal liquefaction. Its composition is complex and changeable, and its toxicity is high. The effluent after secondary biochemical treatment still contains a variety of refractory organic compounds, such as phenols, cyanides, fatty compounds, heterocyclic compounds, etc., which have poor biodegradability and cannot be directly discharged up to the standard. Therefore, how to remove refractory organic pollutants in coking wastewater with high efficiency and low cost has become an urgent problem in the field of sewage treatment. [0003] Biological treatment is widely use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12C02F101/16C02F101/34C02F101/38
CPCC02F3/1263C02F2305/06C02F2101/16C02F2101/345C02F2101/38Y02W10/10
Inventor 夏瑜李娜何绪文李维嘉夏凯玉
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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