A combined process and treatment system for high ammonia nitrogen wastewater treatment

Abstract

The invention discloses a combined process for the treatment of high ammonia nitrogen wastewater, which comprises the following steps: solid-liquid separation → biological turntable pretreatment → biological contact oxidation advanced treatment → coagulation and sedimentation. The biological turntable pretreatment unit of the treatment system adopted in the process is adopted A plurality of turntables are supported on the same rotating shaft. Each turntable is driven by a planetary gear reducer with different transmission ratios. The rotation speed of the turntable is gradually reduced from the water inlet to the water outlet. The gas device adjusts the dissolved oxygen concentration of the high ammonia nitrogen waste liquid, so that the pretreatment system has a higher pollutant load, and the biological contact oxidation advanced treatment unit is equipped with several contact oxidation fillers, which rely on the iron-carbon micro-electrolysis-activated carbon fiber combination. The characteristics of electrolysis and biofilm degradation enhance the efficiency of nitrogen and phosphorus removal in the system, especially when dealing with low-carbon and high-ammonia-nitrogen wastewater (biogas slurry), overcoming the serious imbalance of the C / N ratio in the biogas slurry and improving the treatment efficiency of high-ammonia-nitrogen wastewater .

Description

technical field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a combined process and a treatment system for treating high-ammonia-nitrogen wastewater. Background technique

[0002] Rural non-point source pollution refers to dissolved or solid pollutants in rural life and agricultural production activities, such as soil particles, nitrogen, phosphorus, pesticides, heavy metals, and rural livestock manure in farmland. With organic or inorganic substances such as household garbage, from non-specific areas, under the action of precipitation and runoff erosion, through farmland surface runoff, farmland drainage and underground leakage, a large number of pollutants enter the receiving water bodies (rivers, lakes, reservoirs, pollution caused by the bay). At present, the organic wastewater with suspended solids, organic pollutants and ammonia nitrogen "three highs" in livestock and poultry breeding wastewater is the main source of ag...

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