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A kind of pig farm wastewater advanced treatment and resource recycling method

A pig farm wastewater and advanced treatment technology, which is applied in the direction of animal husbandry wastewater treatment, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problem of inability to realize the resource utilization of coagulation sludge and the inability to reflect the removal effect of TP and COD , Dealing with high cost and other issues, achieving the effect of realizing high value-added recycling, realizing resource utilization, and simple operation

Active Publication Date: 2020-01-17
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot achieve the purpose of resource utilization of coagulation sludge, the treatment cost is greatly increased, and the removal effect on TP and COD cannot be reflected

Method used

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  • A kind of pig farm wastewater advanced treatment and resource recycling method

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Effect test

Embodiment 1

[0050] A method for advanced treatment and resource recycling of pig farm wastewater, comprising the following steps:

[0051] (1) Accurately weigh 12.10g FeCl 3 ·6H 2 O (0.045mol Fe) and 36.40g MgCl 2 ·6H 2 O (0.179mol Mg), was dissolved in 1L of clear water simultaneously, and mixed metal salt solution was obtained after stirring and dissolving (at this time, the metal cation molar concentration of the gained mixed salt solution Mg:Fe=4:1);

[0052] (2) Weigh Na 2 CO 3 Add it to 1L of pig farm wastewater (obtained from a pig farm in Huizhou), adjust the pH=8 to 9, and stir for 30 minutes to obtain pig farm wastewater I;

[0053] (3) Accurately weigh 1.0g of biochar into 1L of pig farm waste water I obtained in step (2), make the biochar concentration 1g / L, stir at 50r / min for 20min, then stir and add 10mL of step (1) The mixed metal salt solution obtained in the MgFe mass concentration [Mg 2+ ]+[Fe 3+ ]=100mg / L, turn 5min under the condition of 150r / min, turn 30min u...

Embodiment 2

[0060] A method for advanced treatment and resource recycling of pig farm wastewater, comprising the following steps:

[0061] (1) Accurately weigh 12.10g FeCl 3 ·6H 2 O (0.045mol Fe) and 18.20g MgCl 2 ·6H 2 O (0.090mol Mg), was dissolved in 1L of clear water simultaneously, and mixed metal salt solution was obtained after stirring and dissolving (at this time, the metal cation molar concentration of the mixed salt solution of the gained Mg:Fe=2:1);

[0062] (2) Weigh Na 2 CO 3 Add it to 1L of pig farm wastewater (obtained from a pig farm in Huizhou), pH = 8-9, stir for 30 minutes to obtain pig farm wastewater I;

[0063] (3) Accurately weigh 0.1g of biochar into the 1L pig farm waste water I obtained in step (2), make the concentration of biochar be 0.1g / L, stir at 200r / min for 10min, then stir and add 6mL of step (1 ) in the mixed metal salt solution obtained, so that the MgFe mass concentration [Mg 2+ ]+[Fe 3+ ]=60mg / L, turn 2min under the condition of 200r / min, tur...

Embodiment 3

[0067] A method for advanced treatment and resource recycling of pig farm wastewater, comprising the following steps:

[0068] (1) Accurately weigh 12.10g FeCl 3 ·6H 2 O (0.045mol Fe) and 27.30g MgCl 2 ·6H 2 O (0.134mol / L Mg), was dissolved in 1L of clear water simultaneously, and mixed metal salt solution was obtained after stirring and dissolving (at this time, the metal cation molar concentration of the gained mixed salt solution Mg:Fe=3:1);

[0069] (2) Weigh Na 2 CO 3 Added to 1L pig farm wastewater (obtained from a pig farm in Huizhou), pH = 7-8, stirred for 30min to obtain pig farm wastewater I;

[0070] (3) Accurately weigh 0.5 biochar into 1L pig farm waste water I obtained in step (2), make the biochar concentration 0.5g / L, stir at 100r / min for 15min, and then add 8mL in step (1) The obtained mixed metal salt solution makes the MgFe mass concentration [Mg 2+ ]+[Fe 3+ ]=80mg / L, turn 3min under the condition of 100r / min, turn 25min under the condition of 75r / mi...

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Abstract

The invention discloses a piggery wastewater advanced treatment and resource recycling method. The method comprises the following steps: (1) adding water into a mixed metal salt and dissolving to obtain a coagulant solution; (2) regulating the pH of the piggery wastewater to alkalinity to obtain piggery wastewater I; (3) adding biochar into the piggery wastewater I obtained in the step (2), and stirring to obtain piggery wastewater II; (4) adding the coagulant solution obtained in the step (1) into the piggery wastewater II obtained in the step (3), stirring, standing, and performing solid-liquid separation, wherein the upper layer is the treated piggery wastewater III, and the lower layer is coagulated sludge. The method provided by the invention realizes a good advanced treatment effect on the piggery wastewater and can effectively remove phosphorous and COD; meanwhile, the recycled coagulated sludge can serve as a potassium-phosphorous organic compound fertilizer, and resource utilization is realized; moreover, the process is simple and stable, the production cost is low, and large-scale application is easy to realize.

Description

technical field [0001] The invention belongs to the field of waste water resource utilization, and in particular relates to a pig farm waste water advanced treatment and resource recycling method. Background technique [0002] Pig farm wastewater has complex components, high nitrogen and phosphorus concentrations, difficult treatment, and high cost. Incomplete treatment can lead to a series of serious environmental problems. The Ministry of Environmental Protection of the People's Republic of China has implemented a second consultation on the discharge standard of livestock and poultry breeding wastewater (Huan Ban Han [2014] No. L was raised to 5.0mg / L and 150mg / L respectively. In the original conventional treatment process, it was difficult for biochemical / ecological treatment to achieve TP 5.0mg / L and COD150mg / L effluent. Taking a pig farm in Huizhou as an example, the previous research experience found that most of the toxic and harmful substances such as heavy metals a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/52B01J20/20B01J20/30C05F7/00C02F103/20
CPCB01J20/20B01J2220/4825C02F1/281C02F1/5245C02F2103/20C05F7/00Y02A40/20
Inventor 黄柱坚黄芷嫣崔理华梁瑜海毛小云
Owner SOUTH CHINA AGRI UNIV
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