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Treatment method for converting urine to resources and energy

A treatment method and resource-recycling technology, applied in the fields of energy and wastewater treatment, chemical instruments and methods, biochemical equipment and methods, etc., can solve the problems of cost, difficult crop or plant utilization, etc., to maintain pH value, prevent pH value The effect of excessive reduction and reduction of production load

Active Publication Date: 2012-09-05
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has not only processed urine but also recovered nitrogen and phosphorus, this method has the following disadvantages: it needs to add phosphate and magnesium salt, which obviously requires cost; the result is the precipitation of inorganic substances carrying other components in the urine, which is easy to Precipitation means that it is difficult to be used by crops or plants

Method used

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  • Treatment method for converting urine to resources and energy
  • Treatment method for converting urine to resources and energy

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A kind of method that is used for urine resource and energy, this method comprises the following steps: (1) put 1000m in photobioreactor 3 water, take 1m 3 The green river water is inoculated with microalgae, and poured into the photobioreactor (2) Take 200L of urine and add it into the bioreactor, and acclimatize it under natural sunlight. Add 200L of urine every day, and the acclimatization is completed after 10 days. After that, 2L of urine per day was steadily added to the photobioreactor to enter the stable culture stage, and the biomass at this time was 5g / L. (3) The microalgae are separated by filtration, and put into a biogas fermenter after ultrasonic crushing. (4) The microalgae stays in the biogas fermenter for 10 days, 40% of which are converted into biogas, 30% into biogas slurry, and 30% into biogas residue. The biogas enters the gas storage tank for standby, the biogas slurry flows back to the photobioreactor, and the biogas residue is used as fertilize...

Embodiment 2

[0039] A kind of method that is used for urine resource recovery and energy conversion, this method comprises the following steps: (1) put 1m in photobioreactor 3 Water, take 1L of green river water to inoculate microalgae, and pour it into the photobioreactor. (2) Take 50mL of urine and add it into the bioreactor, and acclimatize it under natural sunlight, adding 50mL of urine every day, and the acclimatization is completed after 10 days. After that, 500mL of urine per day was steadily added to the photobioreactor to enter the stable culture stage, and the biomass at this time was 0.5g / L. (3) The microalgae are separated by filtration, and put into a biogas fermenter after ultrasonic crushing. (4) The microalgae stays in the biogas fermenter for 3 days, 40% of which are converted into biogas, 40% into biogas slurry, and 20% into biogas residue. The biogas enters the gas storage tank for standby, the biogas slurry flows back to the photobioreactor, and the biogas residue is ...

Embodiment 3

[0041] A kind of method that is used for urine resource recovery and energy conversion, this method comprises the following steps: (1) put 5m in photobioreactor 3 Water, buy Chlorella (Chlorella), and inoculate into the photobioreactor after expansion. (2) Take 10L of urine and add it into the bioreactor, and carry out proliferative culture on it under natural sunlight, adding 10L of urine every day, and it will be completed after 10 days. After that, 100L of urine per day was steadily added to the photobioreactor to enter the stable culture stage, and the biomass at this time was 50g / L. (3) Microalgae are separated by filtration and directly put into a biogas fermenter. (4) Microalgae stay in the biogas fermenter for 45 days, 50% of which are transformed into biogas, 30% into biogas slurry, and 20% into biogas residue. The biogas enters the gas storage tank for standby, the biogas slurry flows back to the photobioreactor, and the biogas residue is used as fertilizer for sta...

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Abstract

The invention relates to a treatment method for converting urine to resources and energy. The method comprises the following steps that: urine is thrown into a photobioreactor with microalgae inoculated, the microalgae grow fast in the photobioreactor under the effect of the urine, and when the concentrations of the microalgae reach 0.5-50g / L, the microalgae are separated from the photobioreactor and are put into a biogas fermentor to be fermented for 3-45 days to generate biogas, biogas slurry and biogas residues, wherein the biogas is used as energy; the biogas slurry returns to the photobioreactor to be recycled; and the biogas residues are used as organic fertilizers or compound fertilizers. Compared with the prior art, the treatment method has the following advantages: the urine is adopted as the unique nutrient source of the whole system, the whole system can well operate without any other nutrient source, grow the microalgae continuously and stably generate the biogas and the organic fertilizers or compound fertilizers; the urine is taken locally without collection or transportation, does not need to be bought as the unique hand feed of the system and is totally free; and the system has simple structure and low cost and is easy to manufacture and install.

Description

technical field [0001] The invention relates to the fields of environment, agriculture and energy, in particular to a treatment method for recycling urine into energy. Background technique [0002] Nitrogen (N) and phosphorus (P) are important causes of eutrophication in lakes, rivers and coastal waters, and are also important agricultural resources. Removing and recycling nitrogen and phosphorus from domestic sewage can not only achieve the purpose of protecting the environment, but also can be used as resources for recycling. Under normal circumstances, the concentration of nitrogen and phosphorus in domestic sewage is usually low, and it is difficult and uneconomical to directly recover from it. Therefore, most of the current control technologies for nitrogen and phosphorus in sewage do not recycle, but only for the purpose of removal and treatment. Ammonia nitrogen is converted into nitrogen gas (N 2 ) directly into the atmosphere, while phosphorus is converted into sl...

Claims

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Application Information

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IPC IPC(8): C12P5/02C12N1/12C02F3/32C05F5/00C12R1/89
CPCY02A40/20Y02E50/30Y02W10/37Y02W30/40
Inventor 靳强
Owner SHANGHAI JIAO TONG UNIV
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