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An anaerobic dynamic membrane reactor for efficient treatment of refractory wastewater

A technology for treating wastewater and reactors, applied in anaerobic digestion treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. Treatment cost, efficiency improvement, and efficient treatment effect

Active Publication Date: 2021-12-28
清林创能(上海)技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on the combination of conductive materials and dynamic membrane technology to efficiently treat refractory wastewater has not been reported.
[0011] Patent CN104891645B reports a silkworm cocoon self-generated dynamic membrane bioreactor. The reactor uses silkworm cocoons as the dynamic membrane carrier, which solves the problem that non-woven fabrics, steel mesh and other carriers are prone to clogging and perishability, but the silkworm cocoons are small in size and expensive , not easy to apply in engineering
[0012] Patent CN204434354U reports a dynamic membrane bioreactor for degrading industrial sewage. The reactor uses polypropylene non-woven fabric as a carrier. Polypropylene non-woven fabric does not have conductivity and cannot enrich electroactive microorganisms.

Method used

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  • An anaerobic dynamic membrane reactor for efficient treatment of refractory wastewater
  • An anaerobic dynamic membrane reactor for efficient treatment of refractory wastewater
  • An anaerobic dynamic membrane reactor for efficient treatment of refractory wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The reactor feed water is brewery simulated wastewater (COD 1000mg / L-10000mg / L), and the initial COD concentration of the reactor is 1000mg / L for anaerobic mud acclimatization. The acclimatization period runs for a total of 12 days, and the effluent COD concentration is stable <100mg / L After L, it enters the filtration stage. During the filtration period, the concentration of COD in the influent water is 1000mg / L, and then continuously increases to 3000mg / L, 5000mg / L, 7000mg / L, 9000mg / L, and finally increases to 10000mg / L; each load runs for 10 days . The anaerobic dynamic membrane reactor with non-woven fabric as the carrier experienced acidification collapse when the COD concentration increased to 5000mg / L, while the reactor with conductive carbon cloth as the carrier operated stably until the COD concentration increased to 10000mg / L, and the operation was stable The COD removal rate was stable above 95% in the first stage, and the SS removal rate was stable above 90%...

Embodiment 2

[0040] The reactor feed water is waste incineration leachate (COD 3000mg / L-23000mg / L), and the initial reactor feed water is the effluent COD of diluted waste incineration leachate (COD 3000mg / L) treated by anaerobic methanogenesis The concentration is stable <100mg / L, and it has been running for 22 days. After entering the filtration stage, the reactor with carbon cloth as the carrier continuously increases the concentration of influent COD from 3000mg / L to 5000mg / L, 7000mg / L, 9000mg / L, and finally to 23000mg / L; each load runs 10 days, and the whole stage runs for 93 days in total. The COD removal rate is stable above 90% in the stable period, and the SS removal rate is stable above 90% in the whole stage. However, the reactor with non-woven fabric as the carrier will collapse when the influent water increases to 18000 mg / L. The anaerobic dynamic membrane reactor strengthened by conductive carbon cloth improved the treatment efficiency of waste incineration leachate by 27.8...

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Abstract

The invention provides an anaerobic dynamic membrane reactor for treating refractory wastewater, which can effectively remove organic matter and suspended solids (SS) in high-concentration wastewater. The present invention adopts the dynamic membrane module as an inner concave type, quantitatively controls the thickness of the dynamic membrane layer through the shear force generated by the circulating gas and the baffle plate of a certain thickness, does not need to perform backwash cleaning, avoids the shedding of the dynamic membrane layer, and ensures the stability of the effluent water quality; The present invention uses conductive carbon cloth as a carrier material for biofilm formation, which can enrich more microorganisms with electron transfer ability, improve the electron transfer efficiency between microorganisms in the dynamic film layer, and further improve the degradation of organic matter and the efficiency of anaerobic methanogenesis. At the same time, the dynamic membrane layer can effectively intercept SS and macromolecular refractory organic substances (>4000Da) in the wastewater, improve the quality of the effluent, and facilitate the subsequent treatment of the effluent. In addition, the anaerobic dynamic membrane bioreactor has simple operation and low cost.

Description

technical field [0001] The invention belongs to the field of biological treatment of refractory wastewater, in particular to an improved anaerobic dynamic membrane bioreactor. Background technique [0002] In recent years, dynamic membrane technology has attracted more and more attention as an emerging sewage treatment technology. Dynamic membrane technology refers to the use of precoating agents or activated sludge to form precoated or self-generated membranes on the surface of large-pore support materials to strengthen Wastewater solid-liquid separation effect. Compared with traditional membrane technology, dynamic membrane technology is more suitable for large-scale applications because of its low cost of membrane materials, high flux, low membrane fouling rate and easy control. Among them, the self-generated dynamic membrane is a biofilm layer formed by the accumulation of sludge flocs on the surface of the carrier material during the filtration process. The thickness o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F101/30
CPCC02F3/2853C02F2101/30
Inventor 党岩贾瑞雪孙德智刘新颖
Owner 清林创能(上海)技术有限公司
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