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Composite system used for purifying high ammonia nitrogen pig breeding biogas slurry via algae-bacterium symbiosis/ecological floating bed combined technology

A high-ammonia-nitrogen swine biogas and ecological floating bed technology, which is applied in the field of a composite system of algae-bacteria symbiosis combined with ecological floating bed technology to purify high-ammonia nitrogen swine biogas slurry, can solve the problem of high ammonia nitrogen biogas slurry treatment cost, difficult operation, and difficulty in popularization, etc. problems, to achieve the effect of improving treatment efficiency, improving the environment, and good effluent quality

Active Publication Date: 2017-02-15
HUNAN UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a composite system for purifying high-ammonia-nitrogen pig biogas slurry by algae-bacteria symbiosis combined with ecological floating bed technology, so as to solve the common problems of high ammonia-nitrogen biogas slurry treatment cost, difficult operation, poor effect and difficult to popularize in current pig farms

Method used

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  • Composite system used for purifying high ammonia nitrogen pig breeding biogas slurry via algae-bacterium symbiosis/ecological floating bed combined technology
  • Composite system used for purifying high ammonia nitrogen pig breeding biogas slurry via algae-bacterium symbiosis/ecological floating bed combined technology

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Embodiment

[0027] Taking the pig biogas slurry treatment process of a large-scale pig farm as an example, the device of the present invention is used to process the biogas slurry.

[0028] The solid-liquid separation of 10 tons of pig farm waste water was carried out, and the liquid entered the anaerobic fermentation tank for fermentation. After the fermentation, the biogas slurry was temporarily stored in the biogas slurry storage tank. The measured initial COD was 1350mg / L, ammonia nitrogen was 280mg / L, and the total Phosphorus is 12mg / L, pH is 8.6, the ratio of nitrogen to phosphorus and pH are all within the appropriate range, and it can be used directly without adjustment.

[0029] The biogas slurry enters the system from the water inlet and is processed under the joint action of microalgae, photosynthetic bacteria and plants. The photosynthetic bacteria inoculated in the algae treatment area are Rhodobacter capsulata, and the microalgae are Scenedesmus. The ratio of photosynthetic ...

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Abstract

The invention discloses a composite system used for purifying high ammonia nitrogen pig breeding biogas slurry via algae-bacterium symbiosis / ecological floating bed combined technology. According to the composite system, algae-bacterium symbiosis and ecological floating bed technology is taken as a base, a high-efficiency low-consumption standard treatment system of high ammonia nitrogen pig breeding biogas slurry is constructed, and algae bacterium biomass and plant are obtained at the same time. A purifying method comprises following steps: pig breeding waste water is subjected to solid-liquid separation firstly, and is delivered into an anaerobic fermentation pool; generated high ammonia nitrogen biogas slurry is subjected to pH adjusting and nutritive salt adjusting, and is delivered into the composite system for processing, and biochemical treatment effluent is delivered through a flocculating settling pool and a disinfectant pool so as to realize clear water up-to-standard release. Operation is simple; operation cost is low; pollutant removing efficiency is high; harvested algae bacterium biomass can be taken as a raw material of feed, biological hydrogen production, and biodiesel, and no secondary pollution is caused.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a compound system for purifying high-ammonia-nitrogen pig biogas slurry in combination with algae-bacteria symbiosis and ecological floating bed technology. Background technique [0002] In recent years, my country's pig industry has developed rapidly, and correspondingly, a large amount of breeding wastewater has been produced. The pig wastewater is rich in nitrogen, phosphorus, high suspended solids and Ca 2+ , Mg 2+ A variety of metal ions, such as complex components and poor biodegradability, require advanced treatment. Anaerobic fermentation is the mainstream method to treat pig wastewater, and the product of pig wastewater after anaerobic fermentation is pig biogas slurry. Since pig biogas slurry still contains high concentrations of ammonia nitrogen and other organic and inorganic substances, direct discharge will also cause many hazards. [0003] Algae...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/34C02F11/04C02F9/14C02F103/20
CPCC02F1/52C02F1/66C02F1/76C02F3/325C02F3/34C02F9/00C02F11/04C02F2103/20Y02E50/30
Inventor 杨春平吴梦洁罗乐仇璐周振焦盼盼刘海洋周自力娄伟
Owner HUNAN UNIV
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