ENERGY GRASS COMPREHENSIVE RECYCLING METHOD

Abstract

This present invention discloses an integrated method of cyclic utilization of energy grasses comprising the steps of generating biogas residue from the energy grasses, growing edible mushrooms from the biogas residue, producing livestock or poultry feeds from the spent mushroom culture medium, feeding livestock with the feeds, and producing organic fertilizers from the manure of the livestock or poultry. The method, by producing biogas, edible mushrooms, feeds, livestock or poultry, and organic fertilizers, makes an integrated and cyclic use of energy grasses and aforementioned products. This invention will help achieve the goal of cyclic use of energy grasses with great efficiency.

Claims

1. An integrated method of cyclic utilization of energy grasses featuring cyclic and integrated use of energy grasses, biogas, edible mushrooms, livestock or poultry feeds, and organic fertilizers, said method comprising the steps of: (1) generating biogas and biogas residue from said energy grasses; (2) growing edible mushrooms from said biogas residue; (3) producing livestock or poultry feeds from said spent mushroom culture medium; (4) feeding livestock or poultry with said feeds; (5) producing organic fertilizers from the manure of said livestock or poultry.

2. The method of claim 1, wherein said energy grass is selected from one or more of the following: Neyraudia reynaudiana (Kunth) Keng, Saccharum arundinaceum, Phragmites australis (Cay.) Trin. ex Steud, Miscanthus floridulus (Labill.) Warb. ex Schum. et Laut., Pennisetum purpureum Schumach, Pennisetum sinese Roxb, Pennisetum purpureum cv. Jujuncao, Pennisetum alopecuroides (L.) Spreng, Spartina anglica Hubb., Sorghumpropinqaum (Kunth.) Hitch., Sorghum bicolor L. Moench, silaged Zea mays L, Cymbopogon citratus, Spartina alterniflora Loisel.

3. The method of claim 1, wherein said edible mushroom is one of the following: Pleurotus eryngii, Flammulina velutipes, Volvariella volvacea, Pleurotus ostreatus, Agaricus bisporus, Auricularia auricula, Lentinus edodes, Pleurotus geesteranus, Auricularia polytricha, Tremella fucitormis, Ganoderma lucidum, Hypsizygus marmoreus, Grifola frondosa, and Agrocybe cylindracea.

4. The method of claim 1, wherein said livestock or poultry is one of the following: cattle, sheep, chicken, duck, goose, rabbits, and pigs.

5. The method of claim 1, wherein steps (1)-(5) are accomplished in the following more specific manners: (1) generating biogas and biogas residue accomplished by first cutting, smashing and ensiling said energy grasses, and then fermenting the energy grasses to generate biogas and biogas residue; (2) growing edible mushrooms accomplished by first drying said biogas residue, preparing mushroom culture medium from the dry biogas residue, and then growing edible mushrooms using said culture medium; (3) producing livestock or poultry feeds by first fermenting, drying, smashing, sifting the spent mushroom culture medium, and then producing livestock or poultry feeds from said treated mushroom culture medium; (4) feeding livestock or poultry with accomplished by administering to the livestock or poultry with said mushroom residue livestock or poultry feeds alone or mixed with other feeds; (5) producing organic fertilizers accomplished by first mixing said livestock or poultry manure with other organic matters, composting, retting, and inoculating organic fertilizer leavening agent into the mixture, and finally fermenting, drying, smashing, sifting, and spraying nutrient fortified composition to obtain organic fertilizers.

Description

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0042] The present invention is further described in the following exemplified embodiment to illustrate the application of the principles of the invention. It is understood that the invention may be embodied otherwise without departing from such principles. The scope of the claims of the present invention expressly should not be limited to such exemplary or preferred embodiments.

Embodiment One

[0043] This embodiment discloses a method to combine the elements of Pennisetum purpureum cv. Jujuncao-biogas-Pleurotus eryngii-feed-cattle-organic fertilizer into an integrated agricultural recycling system.

[0044] The method is carried out in the following procedure:

[0045] Step 1: producing biogas from Pennisetum purpureum cv. Jujuncao, which comprises the following sub-steps:

[0046] 1a. cutting Pennisetum purpureum cv. Jujuncao into 3 cm in size, adding silage inoculants, and ensiling for 20 days;

[0047] 1b. producing biogas by fermenting said silage from step la under the temperature of 37 C., gradually adding silage to total dry silage content of 15 wt. %, feeding and discharging 20 wt. % matters once every 5 days;

[0048] Step 2: producing Pleurotus eryngii from the biogas residue from step 1, which comprises the following sub-steps:

[0049] 2a. taking the biogas residue after 30 day normal fermentation from step 1, then extruding or drying the residue to a matter with a water content of 60 wt. %;

[0050] 2b. preparing edible mushrooms culture medium from the biogas residue from step 2a, the culture medium formula containing, on dry base, biogas residue 60%, sawdust 25%, gypsum 2%, sucrose 1.5%, ammonium bicarbonate 2%, and Calcium superphosphate 1%;

[0051] 2c. mixing the culture medium materials, adjusting the water content to 65 wt. %, and proceeding to sterilization and inoculation;

[0052] 2d. producing Pleurotus eryngii by culture medium from step 2c;

[0053] Step 3: producing cattle feed from the spent Pleurotus eryngii culture medium from step 2, which comprises the following sub-steps:

[0054] 3a. after harvesting Pleurotus eryngii twice, inoculating the spent Pleurotus eryngii culture medium with feed microbial agents, fermenting the granules for 7 days, and drying the fermented matter to 15 wt. % water content, then pulverizing and sifting the matter through a sieve with mesh size of 40;

[0055] 3b. producing cattle feeds from the treated Pleurotus eryngii culture medium from step 3a;

[0056] Step 4: feeding cattle with mixed feeds supplemented by 30 wt. % of the feed from step 3;

[0057] Step 5: producing organic fertilizer from the cattle manure of step 4, which comprises the following sub-steps:

[0058] 5a. mixing 65% of the cattle manure of step 4 with 30% energy grass in dry weight, composting and retting the mixture, then maintaining the water content to 65 wt. %;

[0059] 5b. inoculating organic fertilizer starter culture into the mixture from 5a;

[0060] 5c. fermenting the mixture for 15 days, drying the matter to a moisture content of 15 wt. %, pulverizing and sifting the matter through a sieve with mesh size of 30, spraying nutrient fortified composition, granulating by disk granulation or extrusion granulation method, and packaging.