Nanning kitchen waste treatment capacity is less than 90% variable diesel biogas and fertilizer

The “Measures for the Management of Kitchen and Kitchen Waste in Nanning” (hereinafter referred to as the “Measures”) was implemented on March 1st. As the only Nanning kitchen waste treatment plant in Nanning that has obtained the license for collecting, transporting and disposing of municipal solid waste, what is the current operation situation? Yesterday, the reporter learned from the factory-Guangxi Lande Renewable Energy Co., Ltd. that the treatment plant can handle 200 tons of kitchen waste per day, but now it receives more than 10 tons of kitchen waste every day, according to market research, Nanning currently produces 500 tons of kitchen waste per day.

The current situation only receives more than 10 tons of kitchen waste every day.

Yesterday afternoon, the reporter drove from the end of the University West Road to the west along Qianlong Road, and saw two tall silver-white cans on the left side of the road. This is the resource utilization and harmlessness of the kitchen waste in Nanning. Treatment Plant (hereinafter referred to as “Nanning City Kitchen Waste Treatment Plant”). The reporter saw in the factory that some workers were checking some machinery and equipment.

"Today, I only received more than 10 tons of kitchen waste. It only took about half an hour to process in the morning, and I didn't work in the afternoon." Li Changjiang, engineer of Guangxi Lund Renewable Energy Co., Ltd., said that Nanning kitchen Garbage disposal began to have the ability to dispose of kitchen waste in October last year. At the same time, it began to process and dispose of kitchen waste. Since the “Management Measures for Kitchen Waste in Nanning City” was not introduced, they visited four or five hundred catering enterprises. The propaganda explained that their company went to the door to collect and dispose of kitchen waste for catering companies free of charge, but until now they signed a contract with them to hand over the kitchen waste, there are only four or five medium-sized catering enterprises.

Li Changjiang said that in addition to the food and beverage wastes of the four or five catering enterprises that were contracted to the contract, they also went to other places to collect and return some kitchen waste, but now only a total of more than 10 tons of kitchen waste are collected and transported every day. However, the kitchen waste treatment plant is designed to handle 200 tons per day. “The treatment plant is in a state of 'not eating enough' every day.”

The reason is that the kitchen garbage has "oil water" bosses who are unwilling to pay

From March 1st, the “Measures for the Administration of Kitchen Wastes in Nanning” (hereinafter referred to as the “Measures”) began to be implemented, requiring the management of the units for collecting, transporting and disposing of kitchen wastes, and collecting and transporting municipal solid waste according to law. The units that dispose of the licenses shall be disposed of at a fixed point. As the only Nanning kitchen waste treatment plant in Nanning that has obtained permission to collect, transport and dispose of municipal solid waste, why is it now paralyzed?

It is reported that there are currently more than 13,000 catering outlets and self-employed households in the urban area of ​​Nanning. According to incomplete statistics, about 500 tons of food waste, food processing waste and discarded edible oils are produced every day. Why are catering companies reluctant to hand over their kitchen waste?

“The kitchen waste is not a junk for the boss. There is a 'oily water' inside.” The owner of a restaurant in Nanning said, “Our shop’s 'water oil' often has different people to buy, but to save trouble. Packed to a factory, there is a special person to pull away every night, paying a few thousand dollars a year in the store." As for the buyer to use "water oil" to do what, the boss said: "This will not matter."

The food safety department of Nanning said that in recent years, some lawless elements have purchased the kitchen waste to process the “ditch oil” and sold it to the unscrupulous merchants in the name of edible oil at a low price to give the citizens the environment and food safety. It poses a very big threat.

Call on functional departments to increase law enforcement supervision "ditch oil"

The "Measures" stipulate that the units that produce, collect, transport and dispose of kitchen waste should establish a ledger to record the types, quantities, destinations and uses of kitchen waste. The process of collecting, transporting and disposing of kitchen waste is subject to a joint supervision system. When the kitchen waste generating unit delivers the kitchen waste, it shall fill in the joint order truthfully, and the collection, transportation and disposal units shall verify and confirm the joint order when receiving the kitchen waste.

"Because the "Measures" has just been introduced soon, some catering companies may not know much about how the kitchen waste treatment plant handles kitchen waste, and there may be catering companies suspecting the capacity of the kitchen waste treatment plant." Li Changjiang said that this has been signed Four or five catering enterprises are a good start. I hope that the relevant government departments can increase the law enforcement supervision of kitchen and kitchen waste. At the same time, they also urge catering enterprises to know that the kitchen waste treatment plant can handle kitchen waste well.

The combination of the kitchen waste treatment plant and the legislation brought about by the legislation can solve the problem of “ditch oil” and “soil pig” in one step? Some people in the legal profession believe that kitchen waste has its use value. Since there is a reasonable price transaction, the government should encourage and determine whether the government department can consider giving the corresponding subsidy to the catering enterprise after the kitchen waste is legally recycled. Anti-catering companies do not hand over or only hand over some kitchen waste to purify the food chain. (Reporter Li Zhaoqi / Wen Duan Liu Jian / map)

Nanning kitchen waste "high gold content"

More than 90% variable diesel biogas and fertilizer

How does kitchen waste dispose of and utilize kitchen waste in the treatment plant? High utilization rate? Does the garbage affect the surrounding environment during the processing? Let us visit the Nanning City Kitchen Waste Treatment Plant on the spot and look for answers.

Separate "oil water" after garbage sorting

Under the leadership of Li Changjiang, engineer of the technical department of Guangxi Rand Renewable Energy Co., Ltd., the reporter walked along the main road of the factory. The first thing I saw was a room of nearly 100 square meters, and a steel plate that could be opened and closed was installed on the ground. Open the inside of the steel plate is the feed hopper.

"This is the place where the pick-up truck unloads the garbage. The kitchen waste that is collected and transported is first dumped into the feed hopper." Li Changjiang said that the kitchen waste is subjected to preliminary treatment such as stirring and squeezing in the feed hopper, and plastic bags, etc. The inorganic materials are sorted out for landfill or recycling. The oil and water mixture is treated in an oil tank. After treatment, the oil and water are separated, the oil is extracted into oil and fat, and the oil is prepared into biodiesel. At the same time, after the inorganic matter is separated, the remaining organic matter is processed into the biomass separator.

The biomass separator is about 3 meters high and has a motor-like device on top. Its main function is to classify the garbage that has been initially separated from the liquid, and the inorganic substances that are not easily degraded by plastics, glass, metal, etc. are separated into the garbage bins next to them, and the organic matter such as leftover rice and rotten leaves are collectively referred to as pulp. The material is then processed into a 27-meter high anaerobic tank.

Produce biogas after anaerobic fermentation of slurry

In the kitchen waste treatment plant, two tall silver-white anaerobic tanks are eye-catching. Each anaerobic tank can hold 3,000 tons of slurry, and the slurry stays in the anaerobic tank for about 28 days for fermentation degradation. In the process, biogas is generated, which can be made into natural gas for combustion and power generation. The biogas residue forms a vegetable fertilizer, and because the plant fertilizer has a low heavy metal content, it can also be made into a highly efficient organic fertilizer for use by the gardening department. After the water is separated, it enters the sewage biochemical pool and is filtered and discharged to the municipal pipe network for transportation to the sewage treatment plant for treatment.

Li Changjiang said that after their research, Nanning's kitchen and kitchen waste ingredients are better than the kitchen waste in the field. Basically, 90%-95% of the kitchen waste can be extracted and reused, only about 5%. The garbage will be landfilled.

It is reported that the kitchen waste treatment plant handles 200 tons of kitchen waste per day is its processing capacity, but under load operation, it can actually process 400 tons - 500 tons of kitchen waste per day. After returning to the factory, the kitchen waste is not treated immediately, but after being pre-sorted, it enters the anaerobic tank to degrade and ferment. “The treatment plant is enough to handle the total amount of kitchen waste in Nanning,” said Li Changjiang.

From receiving to processing and sealing

In the eyes of many people, the garbage disposal site must be stinking and flies. However, in the kitchen kitchen waste treatment plant in Nanning, the reporter stood beside the open raw material warehouse, and only smelled a faint smell. If the lid was covered, it could not smell the smell.

The secret that controls the odor is hidden in the pipe that traverses the top of the plant. When the special vehicle for unloading garbage enters the factory, the door will automatically close to prevent the odor from leaking out. At the same time, the top pumping system continues to work, sucking the odor into the closed pipe, and then deodorizing it with chemicals. Behind the anaerobic tank is a sewage treatment workshop. After a series of chemical and physical treatments, the liquid such as biogas waste liquid is discharged into the municipal sewage pipe network and sent to the sewage treatment plant for treatment.

The car that collects kitchen waste is also a special car. The reporter saw in the factory that the special kitchen garbage collection vehicle was closed. Li Changjiang said that at present, there are 5 special vehicles for collection in their factory. On March 15th, another 15 special vehicles will be put into use. In addition to sealing, the kitchen garbage collection special vehicle can also perform the first solid-liquid separation in the vehicle. The solid-liquid separation in the treatment plant is actually the second time.

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