Food waste and raw waste solution

15 August 2020
News

Food waste, commonly known as swill, swill, or swill, is the collective term for food waste and kitchen waste. It is mainly domestic waste formed by residents in the process of consumption and is the most important type of food waste. Including food processing leftovers (kitchen waste) and edible residues (sweats) produced by households, schools, canteens and catering industries. Its composition is complex, mainly oil, water, peels, vegetables, rice noodles, fish, meat, bones, waste tableware, plastics, paper towels and other mixtures of various substances. It is characterized by being extremely perishable, stinking, and spreading bacteria and viruses. The amount of food waste in my country is huge, and it is rising rapidly.

Treatment process

Food waste contains extremely high organic matter, so resource utilization is the best treatment method. Common treatment processes are roughly divided into aerobic fermentation as fertilizer and anaerobic fermentation as biogas as fuel.
This program is tailored to the characteristics of the materials in the solid-liquid separation section of the aerobic fermentation process.

Characteristic analysis

Contains hard objects

Food waste not only contains food residues such as fruits, vegetables, meat, etc., but also hard items such as tableware, bottles and cans, bones, etc. Although general food waste is pretreated with sorting and crushing processes, hard broken bones And so on, the back-end dehydration equipment will still cause mechanical jams, wear and other problems.

More fiber

Vegetables, paper towels, meat and other substances contained in the kitchen waste are easy to form fibrous shapes after being crushed or squeezed. If the dehydration equipment of the rotary extrusion method is used, it is easy to cause blockage.

High salt content
Various seasonings used in food preparation contain more salt, which corrodes metal equipment more severely.
Contains grease
Generally, it contains 2% to 5% oil, which makes the food waste more viscous and reduces the treatment efficiency of some dehydration equipment.
Prone to corruption
High organic content, rich in nitrogen, phosphorus, potassium, calcium and various trace elements, so it is very easy to putrefaction, sour and smelly, and easy to breed harmful organisms. If the selection of dehydration equipment is unreasonable, it is easy to start fermentation in the dehydration section, which will affect the subsequent overall fermentation effect.
Smelly
During the storage and transportation of food waste, corruption will inevitably occur, and related malodorous gases such as ammonia, hydrogen sulfide, and methyl mercaptan will be generated. Operators working in this environment for a long time will damage the health of the personnel.

Food waste and raw waste dehydration special modelEllipse-stacked dehydrator

Aiming at the front-end pretreatment dehydration conditions required for aerobic fermentation of food waste, a tailor-made special model is dedicated to solving the optimal treatment plan of aerobic process of food waste.

Technical advantages

Technical characteristics

1. Easy to operate
The upper feeding mode is adopted, which can be directly dumped with the trash can to realize batch operation, which not only saves the cost of storage equipment, but also facilitates the operation of personnel.
2. Large throughput
Unbroken food waste tends to have a small proportion and uneven distribution of moisture content, which makes up for the low efficiency of general treatment equipment when processing food waste.
3. Clean and sanitary
The closed body prevents garbage leakage and affects the cleanliness of the processing environment. At the same time, it is convenient for supporting equipment such as deodorization.

Elliptical disc extrusion dehydration

1. Never block
The elliptical disc continuously rotates between the grid bars to realize the self-cleaning of the filter gap; the air cylinder is squeezed at a constant pressure, automatically releasing the pressure, and never clogging.
2. Large handling capacity
The material is transported forward through the disc rotation, which has a strong handling capacity for materials with a small proportion of food waste, and rapid dehydration ability, which effectively reduces the corruption of food waste.
3. Strong wear resistance
After a small amount of hard impurities enter the equipment, the equipment transports it forward, which can avoid mechanical damage caused by this, and has strong durability.
4. Not afraid of grease
There is no need to add chemicals, and the grease can be discharged with the filtrate for subsequent reuse.

SS301L hexagonal bar
The hexagonal rod drive shaft drives the disc to rotate for a long time, and the inner hole of the disc is not deformed after the disc is stressed, which ensures the accuracy of the disc rotation and avoids the situation of the disc jam.
The SS301L material improves the toughness of the drive shaft, provides sufficient squeezing force for the material, and ensures that the shaft itself is not worn or broken.

Overall stainless steel material
Except for the hexagonal bar, all sheet metal materials of the equipment are made of SS304, which ensures that the equipment will not be corroded during long-term operation.
When processing high-salt materials, SS316L material will be used.

Fully automated continuous operation
Linked with the automatic ascending device or conveyor of the trash can, the continuous feeding and discharging mode of the equipment can keep the materials in and out continuously. The PLC controls the automatic operation of the equipment and automatically adjusts the operation according to the control conditions to realize unattended operation and protect the safety and health of the operators.

Case show

Waste treatment in Wenling, Taizhou, Zhejiang