Method for treating and utilizing high concentration human excrement and urine

Abstract

The high-concentration human excrement and urine treatment and utilization method includes the following measures: making collected high-concentration human excrement and urine undergo the process ofanaerobic fermentation at above 40 deg.C to produce methane gas to implement energy utilization, adding CaO into thick liquor obtained by anaerobic fermentation, through precipitation and separation,to obtain phosphorus-enriched organic fertilizer, feeding the supernatant fluid into purge tower under the alkaline condition, feeding NH3 into gas phase, using H2SO4 clean gas in washing tower to obtain high concentration (NH4)2SO4 solution, and using residual waste water to make standard-reached discharge or flush toilet, irrigate plant or wash car, and using the filter cake as solid fertilizer.

Description

technical field [0001] The invention relates to a feces processing method, in particular to a process for the industrialized treatment and utilization of feces in urban communities. Background technique [0002] China's cities are widely faced with water crisis and water pollution problems. The country consumes about 20 billion cubic meters of tap water every year just for flushing toilets. It is of great significance to our water-scarce countries to collect and process human excrement and urine with high concentration and make use of them. [0003] In recent years, many foreign countries such as the United States, West Germany, Japan, Canada, etc. have invested a lot of money in the research, experiment and development of manure treatment, especially the processing and comprehensive utilization of urban manure. In particular, the United States invested US$10 million in Hawaii in 1988. A laboratory for the comprehensive utilization of feces called "...

AI Technical Summary

Problems solved by technology

[0005] 1. The technological process is relatively complicated, especially the spray drying tower and thermal pulverizer are used in the process, which will inevitably increase the investment scale and operation and maintenance costs;

[0006] 2. Improper use of heat energy, such as heating the raw materials to high-temperature sterilization and then cooling, such a process arrangement will inevitably increase energy consumption, so the product cost will also increase

[0007] 3. The comprehensive utilization of by-products in the production process is not considered, such as the liquid fertilizer separated after dehydration and the biogas generated in the production process are not utilized;

[0008] 4. Discharging liquid fertilizers into rivers not only consumes energy, but also causes secondary pollution

[0009] 5. Without adding necessary supplementary ingredients to the nutrients of the product to become a high-efficiency compound fertilizer, the fertilizer effect of the product is poor

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