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

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...

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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

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