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A method for enhancing anaerobic biological phosphorus removal of wastewater by coupling microcurrent with biochar

A technology of anaerobic organisms and biochar, applied in chemical instruments and methods, biological water/sewage treatment, electrochemical and biological combined treatment, etc., can solve problems such as complex process and difficult control of system parameters, and achieve simple process , reduce the consumption of carbon source, the effect of moderate proportion

Active Publication Date: 2021-06-18
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing patent application CN 104828939 A discloses "a method for multi-stage phosphorus removal and production of phosphine from phosphorus-containing organic wastewater". Through the two reaction units of anaerobic fermentation and microbial electrolysis cell, multi-stage phosphorus removal and production of phosphine are realized. While improving the efficiency of phosphorus removal, the purity of phosphine produced is relatively high, but the process is quite complicated, and the regulation of system parameters also more difficult
The existing patent application CN 106365309 A discloses "a method for anaerobic biological phosphorus removal and phosphorus recovery of phosphorus-containing sewage". By controlling the organic load and phosphorus load of the sewage system to enrich phosphate-reducing bacteria, the phosphate-reducing bacteria will Phosphate in wastewater is transformed into phosphine to achieve the purpose of phosphorus removal; phosphine is a gaseous form of phosphorus cycle, and phosphorus removal in wastewater is achieved through the release of gaseous phosphine. This type of research has been paid more and more attention; See the disclosure of phosphorus removal methods related to this application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Incotting the anaerobic pool of the urban sewage treatment plant to the phosphorus-containing wastewater, the mixed liquid sludge concentration in anaerobic reactor was 5060 mg / L; the mixture was determined after the ultrasound crushing, and the total phosphorus concentration was determined by 520 mg / L; The coconut shell is raw material, under the condition of nitrogen is protected from 15 ° C to 700 ° C, carbonized for 2 h after carbonization, and the resulting carbon group is soaked for 2 h with 0.3 mol / l HCl for 2 h after charging 2 h. Ion washing to wash to the washing liquid, dried to constant weight at 80 ° C, i.e., coconut shell bio, bio-carbon injection is 1.5 kg / m 3 Treatment of phosphorus-containing wastewater;

[0020] Cutting coconut bio-carbon was added to the above-mentioned inoculated wastewater, and the mixture was stirred and mixed and mixed, and the inert positive and negative electrode plate was placed in the reactor, and the output voltage of the...

Embodiment 2

[0023] Proposing the anaerobic pool sludge of the urban sewage treatment plant to a phosphorus-containing wastewater, the mixed liquid sludge concentration of 6960 mg / L in anaerobic reactor, the total phosphorus concentration is 670mg / L; the bamboo is as a raw material, which is protected in nitrogen Under gas conditions, the muffle furnace is warmed to 600 ° C at 20 ° C / min, and the carbonization is cooled to near room temperature, and the obtained carbon group is soaked for 2 h with 0.2 mol / l HCl, and then washed with deionized water to the washing liquid. Sex, dried to constant weight at 80 ° C, that is, the biot bio bio, the bio-carbon investment is 1.0kg / m 3 Treatment of phosphorus-containing wastewater;

[0024] Take the biot bio-carbon to the above-mentioned wastewater, stir mix and mix, adjust the pH to 7.5, and the current intensity in the reactor is stable at 50 mA; placed in a constant temperature water bath of the reactor at a constant temperature water bath,...

Embodiment 3

[0027] Incotting the anaerobic pool sludge of the urban sewage treatment plant to a phosphorus-containing wastewater, the mixed liquid sludge concentration of 3120 mg / L in anaerobic reactor, the total phosphorus concentration is 426mg / L; with bamboo cut, corn stover (mass ratio 1 : 1) The mixture is a raw material, under the condition of nitrogen is protective gas conditions, the muffle furnace is heated to 500 ° C at 25 ° C / min, and the carbon group is cooled to near room temperature, and the resulting carbon group material is soaked in 0.1 mol / l HCl for 2 h, and then Wash it with deionized water to a neutrality, dried to constant weight at 80 ° C, i.e., biocarbon, bio-carbon investment is 0.5 kg / m 3 Treatment of phosphorus-containing wastewater;

[0028] After the binder carbon is added to the above-inoculated wastewater, the mixture is mixed and mixed and mixed and mixed and mixed, and the current intensity in the reactor is stable at 30 mA; the reactor is placed in a...

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Abstract

The invention discloses a method for enhancing anaerobic biological dephosphorization of wastewater by coupling microcurrent with biochar, and belongs to the technical field of wastewater treatment; the invention inoculates anaerobic sludge from urban sewage treatment plants into wastewater containing phosphorus to be treated, and then adds Biochar, stir and mix, adjust the pH value of the wastewater, control the current intensity of the reaction system through an external regulated constant current power supply, anaerobic digestion at 15~35°C; phosphorus-containing wastewater is anaerobically digested under the action of biochar coupling micro-current Microbes convert phosphate into gaseous phosphine and escape from the water body, reducing the total phosphorus content entering the subsequent biochemical unit, and significantly improving the biological phosphorus removal effect of the anaerobic-anoxic-aerobic biochemical treatment system. The process of the present invention The process is simple, the cycle is short, and the phosphorus removal effect is obvious.

Description

Technical field [0001] The present invention relates to a method of biochane coupling micro-current reinforced wastewater anaerobic organisms, belonging to the field of wastewater treatment. Background technique [0002] In recent years, my country's fertilizer, pesticides, phosphorus detergents have increased rapidly, and phosphorus pollution caused by eutrophication, and the lake "Water Hua" and the "red tide" in the near sea "occurred and intensified. Eutrophication has endangered agriculture, fisheries, and also constitute a huge threat to drinking water hygiene and food safety. The control of phosphorus contamination is mainly chemical and biological law. Chemical dephosphorus can produce chemical drugs will produce a large amount of chemical sludge, and the cost of treatment is quite expensive; compared to the biological phosphorus process economics. The traditional biological phosphorus method is based on the principle of polyphosphate anaeroxicum phosphorus, aerobic phosp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28
CPCC02F3/005C02F3/2813
Inventor 刘树根李婷刘煜牛晓君宁平
Owner KUNMING UNIV OF SCI & TECH
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