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 "...

Examples

Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] Take the urban residential area with more than 1000 people as an example to design and use this scheme. Fecal wastewater is first preheated by the high-temperature wastewater from the stripping tower 6 through the heat exchanger 1, and then preheated to above 40°C by using the energy of biogas combustion through the heat exchanger 2, and biogas is generated by anaerobic fermentation 3 Energy utilization, except that a part of the energy is sent to 2 through 10 to generate hot water for heating fecal waste water, and can also generate electricity through generator 11 or produce excess hot water for other purposes. After the fecal wastewater is anaerobically treated, the pH value is adjusted to above 7.5 by adding CaO in the regulator 4. Most of the insoluble matter is precipitated and separated by precipitation 5, and the precipitate is ...

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 "...

Examples

Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] Take the urban residential area with more than 1000 people as an example to design and use this scheme. Fecal wastewater is first preheated by the high-temperature wastewater from the stripping tower 6 through the heat exchanger 1, and then preheated to above 40°C by using the energy of biogas combustion through the heat exchanger 2, and biogas is generated by anaerobic fermentation 3 Energy utilization, except that a part of the energy is sent to 2 through 10 to generate hot water for heating fecal waste water, and can also generate electricity through generator 11 or produce excess hot water for other purposes. After the fecal wastewater is anaerobically treated, the pH value is adjusted to above 7.5 by adding CaO in the regulator 4. Most of the insoluble matter is precipitated and separated by precipitation 5, and the precipitate is ...

Images