Resource recovery device for source-separated urine

Abstract

The invention relates to a resource recovery device for source-separated urine. Specifically, urine firstly passes through an immobilized biological pretreatment system, then a membrane separation system is employed to recover water resource in the urine, ozone disinfection and decoloration are carried out on the recovered water source, then the water source is subjected to pressurized storage andreutilization, while finishing water resource recovery, a urine reduction treatment effect can be realized, thereby reducing the scale of a follow-up nitrogen-phosphorus resource recovery system; theconcentrated water generated by membrane separation enters the resource recovery system, by means of depth hydrolysis, agent adding, struvite precipitation, crystalline product dehydration and a series of steps, a solid nitrogen-phosphorus nutrient element recovery product can be obtained; and the nutrient recovered waste liquid is discharged into a slow percolation land treatment system to increase the number of active microorganisms in water, and transportation of the treated water into the pretreatment system can achieve the effect of enhancing the hydrolysis rate. The device provided by the invention realizes simultaneous recovery of water resource and nitrogen and nitrogen-phosphorus nutrients in urine, and the recovery product has few impurities.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a resource recovery device used for source separation of urine. Background technique [0002] Research data show that urine contains 8000-10000 mg / L of nitrogen and 700-2000 mg / L of phosphorus. According to the current concept, human excrement such as urine is a kind of pollutant, which requires a large amount of water to wash, resulting in a huge waste of water resources and N and P nutrients. Since nutrients such as nitrogen and phosphorus are important components of fertilizers, recycling the nutrients in urine can solve the problem of high nitrogen and phosphorus loads in sewage treatment plants on the one hand and improve the quality of effluent water; on the other hand, the recycled The product can be used as fertilizer for agricultural production to realize recycling of resources. [0003] At present, there are mainly three kinds of nutrient element recovery tec...

AI Technical Summary

Problems solved by technology

The patent (CN201010168444.8) method applied by people such as Fu Jinxiang is to add NaOH to adjust the pH of urine, then dosing, stirring and precipitation; For a long time, these methods can promote the conversion of urea in urine into ammonia nitrogen to a certain extent, but there are still great defects in the hydrolysis rate and final effect, and the effect is not good in the actual application process.

The most effective way to promote the hydrolysis of urea is to add urea. According to research data, 85% of urea in urine can be converted into ammonia nitrogen within 8 hours under the condition of urease content of 50mg / l, but because urea is very Expensive, which limits the large-scale application of this method

Images