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Method for treating high-concentration organic sewage difficult to degrade

An organic wastewater, high-concentration technology, used in anaerobic digestion treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. Poor biochemical properties, etc., to achieve the effects of reducing toxic effects and influences, improving processing capacity and efficiency, and high organic load rate

Inactive Publication Date: 2008-09-17
北京水气蓝德科技有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] High-concentration refractory organic wastewater has the characteristics of high pollutant concentration, complex composition, high toxicity, and high salt content. The wastewater has poor biodegradability and is difficult to be decomposed by microorganisms. Therefore, conventional wastewater treatment methods are difficult to purify or cannot meet the purification requirements of this type of wastewater. Technical and economical requirements for processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Fecal waste water was added to the adjustment water tank, pumped into the 100L hydrolytic acidification reactor through the feed pump, and stirred continuously for 8 hours under the conditions of temperature of 30°C and pH of 7.0. Then add in the internal circulation anaerobic reactor of 100L, feed flow rate is 9mL / h, regulate the ratio of volatile fatty acid and alkalinity in the internal circulation anaerobic reactor to be 0.3~0.4, be 30 ℃, pH at temperature Stirring was continued for 12 hours under the condition of 7.0. Subsequently, the treatment solution is added to the membrane treatment system for treatment, wherein the membrane pore size is 0.2 μm, and the membrane flux is 80L / (m 3 d), the cross-flow velocity is 3.5m / s, the circulation flow rate is 20:1, the operating pressure is 0.1MPa, the purified water flows out, and the other concentrated liquid is circulated back to the regulating water tank. The method has an average COD removal rate of 97.5%. The volum...

Embodiment 2

[0027] The garbage leachate from the domestic waste landfill was added to the regulating water tank, pumped into the 100L hydrolysis acidification reactor through the feed pump, and stirred continuously for 8 hours at the temperature of 30°C and pH of 7.0. Then add in the internal circulation anaerobic reactor of 100L, feed flow rate is 9mL / h, regulate the ratio of volatile fatty acid and alkalinity in the internal circulation anaerobic reactor to be 0.3~0.4, be 30 ℃, pH at temperature Stirring was continued for 12 hours under the condition of 7.0. Subsequently, the treatment solution is added to the membrane treatment system for treatment, wherein the membrane pore size is 0.2 μm, and the membrane flux is 80L / (m 3 d), the cross-flow velocity is 3.5m / s, the circulation flow rate is 20:1, the operating pressure is 0.1MPa, the purified water flows out, and the other concentrated liquid is circulated back to the regulating water tank. The method has an average COD removal rate o...

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Abstract

The invention relates to a method for treating difficultly degraded high concentration organic wastewater, comprising the steps of (1) adding organic wastewater to be treated into a regulating tank, pumping into a hydrolysis and acidification reactor via a feeding pump, and continuously stirring for 8 hours; (2) adding the treated wastewater from step (1) into an internal circulation anaerobic reactor with feeding speed of 8-10 mL / h, adjusting the ratio of volatile fatty acid and base in the internal circulation anaerobic reactor to 0.3-0.4, and continuously stirring for 12 hours; (3) adding the treated wastewater from step (2) into a membrane treatment system with membrane pore size of 0.2 mum, membrane flux of 80L(m3*d), cross flow speed of 3.5 m / s, circulation ratio of 20:1 and operating pressure of 0.1 Mpa; and (4) collecting the purified water after treatment in step (3), and recycling the concentrated waste liquid to the regulating tank in step (1).

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for treating refractory high-concentration organic wastewater. Background technique [0002] High-concentration refractory organic wastewater has the characteristics of high pollutant concentration, complex composition, high toxicity, and high salt content. The wastewater has poor biodegradability and is difficult to be decomposed by microorganisms. Therefore, conventional wastewater treatment methods are difficult to purify or cannot meet the purification requirements of this type of wastewater. The technical and economic requirements of the treatment. [0003] The treatment of high-concentration organic wastewater is an urgent problem to be solved in the field of environmental protection technology at home and abroad at this stage. How to effectively and economically solve high-concentration refractory organic wastewater is the most urgent and most needed resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/28C02F1/44
Inventor 施军营王飞费成志
Owner 北京水气蓝德科技有限公司
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