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Resource utilization method of livestock excrement water-soluble manure production wastewater for culturing dunaliella

A technology for livestock and poultry manure and waste water production, which is applied in microorganism-based methods, biochemical equipment and methods, and methods for supporting/immobilizing microorganisms, etc., can solve problems such as resource waste and pressure, and achieve cost savings and reduction of pollutant concentrations. , the effect of saving economic costs

Inactive Publication Date: 2016-04-20
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a large amount of biogas slurry is not disposed of, it will not only be a waste of resources, but also cause huge pressure on the soil, water and other environments

Method used

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  • Resource utilization method of livestock excrement water-soluble manure production wastewater for culturing dunaliella
  • Resource utilization method of livestock excrement water-soluble manure production wastewater for culturing dunaliella
  • Resource utilization method of livestock excrement water-soluble manure production wastewater for culturing dunaliella

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In this example, the treated chicken manure water-soluble fertilizer production wastewater has a COD of 823.6 mg / L, a TN of 2979.3 mg / L, and a NH 3 -N concentration is 2166.3mg / L, TP concentration is 9.6mg / L.

[0049] Such as figure 1 , the equipment used for resource utilization of chicken manure water-soluble fertilizer production wastewater includes a photobioreactor 6, an ultrafiltration unit, a microalgae seed liquid culture device 4, and an air intake unit;

[0050] The treated chicken manure water-soluble fertilizer production wastewater is stored in the livestock and poultry manure water-soluble fertilizer production wastewater storage tank 1, and is connected to the bottom of the photobioreactor 6 through the first diaphragm pump 3, the livestock and poultry manure water-soluble fertilizer production wastewater inlet 2 and pipelines , the wastewater inlet is about 10 cm away from the bottom of the reactor, and the microalgae seed culture device 4 is a triangul...

Embodiment 2

[0065] In this example, the treated chicken manure water-soluble fertilizer production wastewater has a COD of 869.4 mg / L, a TN of 2892.3 mg / L, and a NH 3 -N concentration is 2151.2mg / L, TP concentration is 9.5mg / L.

[0066] Processing steps:

[0067] 1. Through the water pump, pump 5L of livestock and poultry manure water-soluble fertilizer production wastewater from the wastewater inlet to the main body of the reactor, add 135L of distilled water, and finally NH 3 -N content was 100.6 mg / L. ;

[0068] 2. Add nutrient salts to NaH in sequence to the wastewater in the reactor 2 PO 4 2H 2 O15mg / L, CaCl 2 2H 2 O40mg / L, MgSO 4 ·7H 2 O1250mg / L, ferric citrate 4mg / L. Set the culture light intensity to 2000 lux, the ratio of light to dark cycle L:D=12:12, each cycle is 12 hours respectively.

[0069] 3. Use NaCl solution to adjust the salinity value of the wastewater to 170, and then use 1mol / L sodium hydroxide solution to adjust the pH value to 8.5. Add microalgae seed ...

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Abstract

The invention belongs to the field of wastewater treatment, and provides a resource utilization method of livestock excrement water-soluble manure production wastewater for culturing dunaliella. The method comprises the following steps: 1) diluting livestock excrement water-soluble manure production wastewater with water, 2) adding nutrient elements like P, Ca, Fe and Mg into the diluted livestock excrement water-soluble manure production wastewater, 3) using one or more of a NaCl solution, seawater and brine to adjust the salinity value of the wastewater to be 150-200, and controlling the pH value to be 8.0-9.0, (4) vaccinating dunaliella in the logarithmic growth phase for culture, and 5) continuously culturing for 8-12 d so as to obtain dunaliella after dunaliella grows to be in the platform phase. According to the provided method, treatment of the livestock excrement water-soluble manure production wastewater and recycle of the nutrient elements are combined, pollutants in the wastewater can be desorbed, biomass raw materials can be produced, and multiple efficacies of environmental protection, cost saving, resource recycle and nutrient element cyclic utilization are played.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a waste water treatment method using microorganisms. Background technique [0002] Livestock and poultry biogas slurry is the residual liquid after anaerobic fermentation of farm manure, which belongs to high-concentration organic wastewater, which contains soluble substances such as ammonium salt, potassium salt, and phosphate salt. N, P, K and other nutrients in biogas slurry. The biogas slurry can be used as organic fertilizer and applied to the land to create more economic value. The biogas slurry produced abroad is usually consumed by the supporting land, but due to the excessive and concentrated biogas slurry output in China, biogas producers do not have enough land for consumption. If a large amount of biogas slurry is not disposed of, it is not only a waste of resources, but also a huge pressure on the soil, water and other environments. [0003] Nowada...

Claims

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Application Information

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IPC IPC(8): C12N1/12C02F3/32C02F9/00C12M1/00C12M1/12C12M1/04C12R1/89
CPCC12N1/12C02F1/444C02F3/322C02F9/00C02F2301/08C12M21/02C12M29/06C12M47/02
Inventor 卢海凤赵煜王新锋张丽李保明张源辉
Owner CHINA AGRI UNIV
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