Method for treating wastewater by coupling iron-carbon micro-electrolysis and anaerobic organisms

An iron-carbon micro-electrolysis and anaerobic biological technology, applied in electrochemical biological treatment, biological water/sewage treatment, chemical instruments and methods, etc., can solve problems such as neglect of organic bonding, waste of resources, and long wastewater treatment process. , to achieve the effect of enhancing sedimentation performance, saving acid consumption, and enhancing anaerobic biochemical effect

Pending Publication Date: 2020-10-16
苏州达道环保科技有限公司
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Problems solved by technology

In engineering applications, iron-carbon micro-electrolysis and anaerobic biological treatment are often regarded as two independent processes. Either the two are used in...

Method used

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  • Method for treating wastewater by coupling iron-carbon micro-electrolysis and anaerobic organisms
  • Method for treating wastewater by coupling iron-carbon micro-electrolysis and anaerobic organisms
  • Method for treating wastewater by coupling iron-carbon micro-electrolysis and anaerobic organisms

Examples

Experimental program
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Effect test

Embodiment 1

[0056] The wastewater treatment station for a printing and dyeing factory handles 3,000 tons of wastewater per day. The wastewater treatment process is pretreatment-anaerobic biochemical treatment-aerobic biochemical treatment-nanotube discharge. After pretreatment (that is, before entering anaerobic biochemical process), the chroma is about 200 times, the CODcr concentration is about 2000mg / L, and the BOD 5 The concentration is about 300mg / L, that is, B:C=0.15. Anaerobic biochemical treatment is stirred by a submersible mixer with a stirring power of 8W / m 3 , hydraulic retention time 8 hours, anaerobic reaction temperature 30 ℃. After anaerobic biochemical treatment, the chromaticity is reduced to about 120 times, the CODcr concentration is reduced to about 1600mg / L, and the BOD 5 The concentration rises to about 420mg / L, ie B:C=0.2625.

[0057] After the renovation of the wastewater treatment station, the measures of adding iron powder and carbon powder are added (except ...

Embodiment 2

[0061] On the basis of embodiment 1, when outdoor temperature is lower than 15 ℃ (simultaneously inflow temperature also reduces to below 12 ℃ thereupon), adopt following measures to ensure the operation and reaction rate of anaerobic reaction:

[0062] 1. Install a rock wool board insulation layer outside the water inlet pool, and install an insulation wrapping layer outside the water inlet pipe and anaerobic reactor: the inner layer of sponge and the outer layer of tin foil.

[0063] 2. Place the steam heat exchanger in the water inlet tank of the anaerobic reactor to heat the water directly; and another steam heat exchanger is placed on the side of the water inlet in the anaerobic reactor to Liquid systems are heated:

[0064] The steam temperature and heating time control in the heating process are obtained by the following algorithm:

[0065] Assume that the effective utilization rate of energy in the heating process is:

[0066]

[0067] Among them, W s is the heat...

Embodiment 3

[0079] A comprehensive sewage treatment plant supporting a fine chemical industrial park handles 10,000 tons of wastewater per day. The wastewater treatment process is pretreatment-anaerobic biochemical treatment-aerobic biochemical treatment-ozone advanced oxidation-discharge water. Anaerobic biochemical treatment adopts UASB reactor. Due to the unsatisfactory effect of anaerobic treatment, the subsequent treatment pressure is relatively high, and the dosage of ozone needs to reach 150g / m 3 The above can make the factory water meet the standard, and the cost of ozone treatment is as high as 1.2 yuan / ton of water.

[0080] In order to reduce the operating cost under the premise of ensuring that the effluent meets the standard, the sewage plant is technically transformed by coupling iron-carbon reaction and anaerobic biochemistry to improve the effect of anaerobic treatment:

[0081] On the basis of keeping the other parameters unchanged, add iron powder and carbon powder into...

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Abstract

The invention discloses a method for treating wastewater through coupling of iron-carbon micro-electrolysis and anaerobic organisms, and relates to the technical field of environment-friendly wastewater treatment, and the method specifically comprises the following steps: inoculating or culturing anaerobic sludge in a wastewater treatment anaerobic bioreactor, operating the reactor, adding iron powder and carbon powder, continuously feeding and stirring wastewater, by an effluent precipitator, separating the wastewater from the coupled sludge, and returning the coupled sludge flows back intothe reactor through a reflux pump. According to the method provided by the invention, iron-carbon micro-electrolysis and anaerobic organisms are integrated in one reaction process, and meanwhile, theeffects of the iron-carbon micro-electrolysis and the anaerobic organisms on pretreatment of refractory or macromolecular organic pollutants in the wastewater are exerted. Through organic combinationof the two, on one hand, the anaerobic biological reaction provides an acidic condition for the iron-carbon micro-electrolysis reaction, so that the iron-carbon reaction is promoted, on the other hand, the iron powder/carbon powder is combined with the anaerobic biofloc to form a combination body with higher density, so that the settling performance of the anaerobic sludge can be enhanced, the enrichment of anaerobic microorganisms is facilitated, and the anaerobic biochemical effect is enhanced.

Description

technical field [0001] The invention relates to the technical field of environmental protection wastewater treatment, in particular to a wastewater treatment technology that couples iron-carbon micro-electrolysis technology with anaerobic biological technology. Background technique [0002] Iron-carbon (Fe-C) micro-electrolysis wastewater treatment technology is to use iron-carbon two materials to form a primary battery oxidation-reduction principle to break the chain of refractory biodegradable pollutants in wastewater, thereby improving the biodegradability of pollutants or completely A wastewater treatment technology that degrades pollutants, also known as internal electrolysis. When elemental iron (such as iron filings or iron powder) and carbon (such as carbon pellets or carbon powder) are immersed in wastewater (electrolyte solution), since there is an electrode potential difference of 0.44V between Fe and C under anaerobic conditions, Therefore, countless micro-batte...

Claims

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Application Information

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IPC IPC(8): C02F3/00
CPCC02F3/005
Inventor 李建
Owner 苏州达道环保科技有限公司
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