CN1091729A

CN1091729A - human excrement particle fertilizer production method

Info

Publication number: CN1091729A
Application number: CN93101916A
Authority: CN
Inventors: 董群; 朱海舟; 王衍庆; 李旭; 李庆瑞; 耿玉玲
Original assignee: ENVIRONMENTAL SANITATION ADMINISTRATION DONGCHENG DISTRICT BEIJING
Current assignee: ENVIRONMENTAL SANITATION ADMINISTRATION DONGCHENG DISTRICT BEIJING
Priority date: 1993-03-05
Filing date: 1993-03-05
Publication date: 1994-09-07

Abstract

The invention discloses the fertile method of a kind of city resident's ight soil suitability for industrialized production farming; comprise the ight soil coarse filtration; fermentation; separate; dehydration; granulation and oven dry etc.; earlier with the human excrement raw material; through filter filtering residue; enter fermentation vat then; partly disliking gas and the temperature rotten heat of fermenting under being 25-35 ℃; in filtrate, add precipitation agent, produce throw out, treat raw material colour-darkening green after; add nitrogen-protecting deodorant in fermented product after the liquid dung separating treatment and the throw out; stir through stirrer, enter the dried device control of sand table control and do, enter the moisture eliminator oven dry again; through the tablets press granulation, make finished product.

Description

Human excrement particle fertilizer production method

The present invention relates to a kind of method of city resident's ight soil suitability for industrialized production agricultural fertilizer, belong to the fertilizer of making by human feces.

The existing fertilizer of making by human feces; as China patent CN 90 107028.9 " the fertile method of urban night soil suitability for industrialized production farming "; it discloses a kind of by the fertile method of ight soil suitability for industrialized production farming; soon the ight soil of collecting by fermentation; by the horizontal spiral centrifuge dehydration, the hot air type grooved stirs the drying-granulating machine and carries out processing such as fragmentation, granulation, drying and sterilization, makes particulate state fertilizer; add phosphate fertilizer breeze, rare earth element etc. again, make composite fertilizer at last.Its weak point is: 1. the ight soil of collecting is earlier through anaerobically fermenting (being biogas fermentation), the composition of organic substance is changed, and can kill the part etiology, but organic carbon is converted into methane (CH4) in a large number, this has not only reduced organic and available nutrient content, produce multiple organic acid and reductibility objectionable impurities, and fermentation time is longer.2. do not add nitrogen-protecting deodorant after the fermentation, can reduce nitrogen nutrient like this.China's patent CN 89 1 02374 " organic-inorganic composite fertilizer " and for example, it discloses a kind of method of utilizing the organic-inorganic composite fertilizer fertilizer of town and country livestock and poultry manure and small amounts of inorganic chemical fertilizers production, its weak point is: 1. a large amount of ight soil that will handle the city resident, but be difficult to obtain a large amount of animal dung, so the urban night soil method manufacturing of ratio of mixture on request.2. this method also is through anaerobically fermenting, also can reduce organic and available nutrient content, produce multiple organic acid and reductibility objectionable impurities, and fermentation time is longer.3. that is added in producing lightly changes the only effect of the property covered up of flavor agent, does not add nitrogen-protecting deodorant after fermentation, can reduce nitrogen nutrient.

But the purpose of this invention is to provide the Pure organic fertilizer that a kind of city resident's of utilization ight soil is produced the needed and fertilizing soil of pollution-free and green food plant husbandry.

The object of the present invention is achieved like this: be raw material with the human excrement, under certain temperature and half anaerobic condition, through short period fermentation back adding nitrogen-protecting deodorant, through fully stirring, the appropriateness dehydration, higher, the non-harmful pure fertilizer of organic content is made in granulation then, oven dry.

Advantage of the present invention: 1. can solve that urban sanitation administrative authority handles and the difficulty of collecting and distributing human excrement, prevent the pollution of human excrement, and can restrain its viral and parasite, improve the urban and rural environment situation to people's infringement to environment.2. in the production process, partly disliking a gas and 25-35 ℃ condition to ferment, can partly kill etiology, unlikely again a large amount of loss organic matters can also be accelerated the part organic nutrient simultaneously and be converted into available nutrient.3. behind the adding nitrogen-protecting deodorant, through fully stirring, can be the bigger ammonium salt of a kind of stability with easily decomposing the nitrogen transformation of evaporable volatile salt attitude, the hydrogen sulfide foul smell can be converted into the sulfide of no stink simultaneously again, nitrogen-protecting deodorant be again the nutrient of farm crop.4. through twice heat-flash wind transpiring moisture, neither can lose the quality that nutrient can improve product again, remaining pathogeny biology is had further killing action.5. aspect plantation, because human excrement particle fertilizer is through nontoxic and harmless treatment, so it is the necessary novel organic fertilizer material of high standard, pollution-free green food.

Accompanying drawing of the present invention has: the fertile technological process of production figure of human excrement particle.

Below in conjunction with drawings and Examples the present invention is further described.

From the technological process of production figure of human excrement particle fertilizer as can be seen.Earlier with moisture about 80% human excrement raw material (1), through filter (2) filtering residue (3) wherein, entering fermentation vat (4) then ferments, partly disliking gas and leavening temperature is the rotten heat of fermenting under 25-35 ℃ the condition, generally through about 7 days, do not need during the fermentation to stir, allow the liquid dung natural separation, and filter, in filtrate (6), add precipitation agent (vitriol oil or concentrated nitric acid), produce throw out (7), after treating that raw material (1) color becomes sap green by tawny, add nitrogen-protecting deodorant (14) in fermented product after liquid dung separating treatment (5) and the throw out, nitrogen-protecting deodorant (14) is selected ferrous sulfate [FeSO4] for use, Iron nitrate [Fe(No3) 2], iron protochloride [FeC12] or ammonium sulfate iron [Fe(NH4) 2(SO4) 2] etc., add-on accounts for the 4-20% of fermented product and weight of precipitate.After stirrer (8) fully stirs; entering the dried device of sand table control (9) control does; enter moisture eliminator (10) again; heat-flash wind (15) with about 120 ℃ is dried, and makes fermented product and throw out water content＜50%, and has plasticity-; through tablets press (11) granulation formation; enter baker (12) again and make particle fertilizer under the heat-flash wind (15) about 120 ℃, carry out drying, make the fertile water content of particle about 10%, enter the program (13) of packaging final prod then.

Fertile sample composition of human excrement particle of the present invention and content thereof, through the Chinese Academy of Sciences, the lab analysis of the natural resources integrated survey council of State Planning Commission, confirm in the sample that organic content is up to more than 70%, full nitrogen is up to 4.55%, phosphorus is up to 1.53%, potassium oxide is up to 0.75%, according to the data introduction, behind the biogas fermentation in the residue total nitrogen content be 0.5-1.2%, rapid available phosphorus (in P205) 50～300PPM, available potassium (in K20) 0.17～0.32%.

The filtrate (6) that dehydration is discharged to appropriateness has also been done analysis, and the result confirms every liter of nitrogen content of filtrate (6) 1.63 grams, phosphorus (P) 42.26PPM, potassium (K) 604.1PPM.In addition, be solid or or the fertile sample of liquid human excrement particle in all also have nearly 30 kinds of nutritive elements, this helps the growth of farm crop.

Be sanitary indexs such as germ in the verification sample and parasitic ovum, will send health quarantine department to do the contrast detection without the raw material (1) and the human excrement particle fertilizer of fermentative processing, the result confirms not contain etiology in the human excrement particle fertilizer.

Claims

1, the fertile method of a kind of city resident's ight soil suitability for industrialized production farming comprises ight soil coarse filtration, fermentation, separation, dehydration, granulation and baking step, the invention is characterized in:

(A) human faecal mass is partly being disliked the rotten heat of fermenting under gas and the 25-35 ℃ condition;

(B) nitrogen-protecting deodorant (14) of adding 4-20% in fermented product after liquid dung separating treatment (5) and the throw out;

(C) before and after the granulation with about 120 ℃ heat-flash wind (15), through twice hot blast transpiring moisture, dry, make fermented product and throw out water content＜50% before the granulation and have plasticity-, fermented product and throw out water content are remained on about 10%.

2, human excrement particle fertilizer production method according to claim 1 is characterized in that above-mentioned nitrogen-protecting deodorant (14) selects ferrous sulfate [FeSO4] for use.

3, human excrement particle fertilizer production method according to claim 1 is characterized in that above-mentioned nitrogen-protecting deodorant (14) selects Iron nitrate [Fe(No3) 2] for use.

4, human excrement particle fertilizer production method according to claim 1 is characterized in that above-mentioned nitrogen-protecting deodorant (14) selects iron protochloride [FeCl2] for use.

5, human excrement particle fertilizer production method according to claim 1 is characterized in that above-mentioned nitrogen-protecting deodorant (14) selects ammonium sulfate iron [Fe(NH4) 2(SO4) 2] for use.