GB4284-2018

Control standards of pollutants in sludge for agricultural use

农用污泥污染物控制标准

GB 4284-2018 é uma norma nacional chinesa obrigatória vigente: Control standards of pollutants in sludge for agricultural use. Setor: Alimentos. Foco: Proteção ambiental. Entrada em vigor: 1 de jun. de 2019.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard applies to the pollutant control of sludge from municipal wastewater treatment plants when used in agricultural lands. It specifically covers the application of sludge products on farmlands, orchards, and pastures. It does not apply to industrial sludge or untreated municipal sludge.

Requisitos técnicos

The standard classifies sludge products into Class A and Class B based on their pollutant concentrations. It specifies maximum limits for heavy metals such as cadmium, mercury, lead, chromium, arsenic, nickel, zinc, and copper, as well as mineral oils, benzo(a)pyrene, and polycyclic aromatic hydrocarbons (PAHs). It defines the permitted agricultural land types for each class. For instance, Class A products can be used on all specified agricultural lands, while Class B is restricted to orchards, pastures, and farmlands not growing edible crops. Manufacturers must strictly adhere to these classification rules to ensure environmental safety. The standard also sets sanitary indicators, including mortality rates for roundworm eggs and fecal coliform limits. Additionally, physicochemical requirements for moisture content, pH, particle size, and organic matter are mandated. Furthermore, it regulates the application dosage. The annual cumulative application must not exceed specified limits, and continuous use on the same plot is restricted to a maximum of 5 years.

Métodos de ensaio

The standard outlines sampling and analytical methods, referencing various national standards such as GB/T 6679 for solid chemical product sampling and CJ/T 221 for municipal wastewater treatment plant sludge testing. It includes methods for heavy metal analysis using atomic absorption spectrophotometry and hygienic indicator testing per GB 7959.

Perguntas frequentes

What products are regulated under GB 4284-2018?

It regulates sludge products from municipal wastewater treatment plants intended for agricultural use on farmlands, orchards, and pastures.

What are the key updates in GB 4284-2018 compared to the 1984 version?

The 2018 version introduces Class A and Class B classifications, adds limits for PAHs, includes sanitary and physicochemical requirements, and specifies maximum application dosages and continuous usage years.

How is the sludge tested for compliance?

Testing involves sampling per GB/T 6679 and analyzing pollutants, sanitary indicators, and physicochemical properties using methods outlined in standards like CJ/T 221 and GB 7959.

The summary above provides a high-level overview of GB 4284-2018. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 4284-2018 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Proteção ambiental
CCS: P41
ICS: 93.030
Órgão competente: Ministry of Housing and Urban-Rural Development
Comitê técnico: Ministry of Housing and Urban-Rural Development

Relações

Substitui:GB 4284-1984