Identification of industrial solid waste attributes

On January 12, 2016, people from Nanjing reported that a large amount of solid waste was landfilled in a company's factory area.

1.

According to site survey, the waste is industrial solid waste from a company in Nanjing, which is the ground dust of the finished product (melamine resin molding powder) during the grinding process.

2.

Melamine resin molding powder is a heat-fixed material produced by melamine resin impregnated with high-grade fiber wood pulp, through reaction, kneading, drying, crushing, color matching, screening and packaging and other processes

(1) The formaldehyde and wood pulp in the solid waste production process are both combustible, and melamine is a combustion-supporting agent.

(2) The solid waste is not in contact with pathogenic microorganisms and is not infectious;

(3) The solid sodium hydroxide is contained in the raw material of the solid waste synthesis process .

(4) According to the production process, under normal temperature conditions, there is no explosive property in "Identification Standard for Reactivity of Hazardous Waste" (GB5085.

(5) The production process of the solid waste formation involves a variety of substances, which may have potential hazards.

Table 10-2 Toxic hazard components corresponding to the substances in the production process

3.

According to the analysis of the above-mentioned demonstration results, the test items for solid waste this time are pH (corrosive) and formaldehyde (toxic substance content)

4.

According to the identification plan, in accordance with the "Technical Specifications for Sampling and Sample Preparation of Industrial Solid Wastes" (HJ/T 20-1998) and "Technical Specifications for Identification of Hazardous Wastes" (HJ/T 298-2007), sampling and testing are carried out, and testing reports are issued

The test results showed that the pH of the 33 samples did not exceed the standard value (pH ≥ 12.

5.

According to the "Hazardous Waste Identification Standards" (GB5085.
1 to 5085.
7-2007) for identification and analysis, the batch of solid waste (chemical composition melamine ) is not in the "National Hazardous Waste List", but the various substances involved in its production process Analyze the samples for corrosiveness and formaldehyde toxicity tests.
Among the 33 samples of formaldehyde, there are 23 samples that exceed the standard, which exceeds the limit of 8 samples.
It can be determined that the batch of solid waste is hazardous waste
.

6.
Issuing an identification report