Livestock manure digestion facility

Abstract

Aiming at the problem of "screening first and pressing later" manure treatment process and equipment, it proposes septic grade change, manure sludge dehydration, manure fermentation, and manure water filtration; a suitable, reliable and economical anaerobic digestion facility for manure is disclosed. The facility has a septic tank composed of a septic tank and a septic valve, and the operation of the septic valve enters the fourth-stage or third-stage anaerobic digestion mode of manure; there is a manure ditch or a manure pipe, and the potential energy is used to send manure; there is also a filter The cylinder and pump / pipe can sink into the septic chamber to pump water, dehydrate the sludge into manure, and then dig out the manure and transport it out for accumulation and fermentation; the filter cartridge can also be covered with a filter cloth bag, and the filter cartridge can be sunk into the manure chamber , pump out clean water and send to rinse.

Description

technical field [0001] The invention relates to anaerobic digestion and utilization of livestock and poultry manure, in particular to anaerobic digestion facilities for livestock and poultry farms through septic tanks. The livestock and poultry include chickens, ducks, geese, cattle, horses, donkeys, pigs, sheep and dogs, and even domestic excrement. Background technique [0002] For livestock and poultry farms, especially dairy farms, the basic features of manure treatment process equipment are: there is a manure collection tank to collect manure and sewage, which is referred to as manure; The sewage pump goes deep into the septic tank to send the manure to the solid-liquid screener on the high platform for concentration; the concentrated manure enters the screw extruder for dehydration; the dehydrated manure is thrown onto the manure pile by the chain plate elevator for use as Cattle bedding or compost; manure discharged from sifters, extruders and elevators to produce bi...

AI Technical Summary

Problems solved by technology

According to the [2014] CN203370353U announcement: the use of vibrating screens and screw extruders to separate manure has the following defects: [1] Vigorous vibration and severe extrusion of manure, resulting in the separation of feed residues that have not been digested by animals , the separation efficiency is extremely low, but most of the manure and its nutrients are discharged into the next process, which increases the load on the sewage treatment system and makes it difficult to achieve the goal of pollution control

A pasture with 10,000 head of cattle needs to backfill about 160m of litter every day 3 , the ranch cannot afford such high operating costs

CN101665312B Announcement records: Many livestock and poultry farm wastes are not processed in time, and they are piled up for a long time, leaving them exposed to the sun and rain, resulting in the birth of mosquitoes and flies in the pens, the spread of plague, increased mortality of livestock and poultry, and heavy losses for enterprises

The main problems of this technology are: large amount of biogas slurry and biogas residue, low nutrient content, difficult to use

[0008] CN105152320A bulletin pointed out that the defect of septic tank is: the septic tank is responsible for the reception and simple treatment of domestic sewage, and the organic matter in the sewage will decompose a variety of toxic, harmful, flammable and explosive gases under anaerobic conditions. Such as methane, hydrogen sulfide gas

[0011] Exploration found that the biggest problem in using septic tanks to treat livestock and poultry manure is: (1) What to use to transport strong corrosion, foul smell, and sticky manure without clogging and corrosion resistance

(2) The concentration of feces is high, and there is a lot of digested feces, so it is not feasible to discard them.

(3) The dung sludge contains a lot of water, it is difficult to transport and store, the cost of storage and transportation is high, and effective utilization is a problem

(4) There is a lot of dung and mud, the mud pool is large, and the cost is high

(5) The sewage discharged from the septic tank must be purified again to meet the discharge standard, and the construction investment and operating costs of the purification equipment cannot be accepted by the farm.