The new regulation was released! banning sludge to be used for organic fertilizer
The latest standard for organic fertilizer, NY525-2021, began to implement, sludge is listed as banned raw materials. This requirement puts many people in shock, especially the people in the sludge composting area.
Banned from using for fertilizer, not banned from agricultural use
The new standard NY525-2021 stipulates: prohibit the use of coal ash, steel slag, and other banned materials with safety risks in the manufacture of organic fertilizer.
Organic fertilizer is a circulating commodity, the country will give organic fertilizer batch number after inspection, to circulate in the market.
The same as the national authority issued by the national brand standards, but to open the way for sludge agriculture.
“Agricultural sludge pollutant control standard” GB4284-2018, which is also a standard released by reliable authorities and has been implemented from June 1, 2019, however, allows the sludge to be used for agriculture.
This standard made a detailed requirement on the definition, type, and use of sludge, applicable to pollutant control of the sludge coming from the urban sewage treatment plant and ending in the cultivated land, garden, and grassland. This standard does not say that sludge cannot be used for agriculture or arable land. Moreover, agricultural use and used for organic fertilizer are two concepts. Agricultural use means that after stabilization and harmless treatment, municipal sludge products that meet agricultural standards can be used for agriculture. And sludge using for organic fertilizer means that after the treatment of sludge, turn it into organic fertilizer for sale.
Although it seems to be the same thing, in terms of circulation and control, they have their concerns.
I support the ban on sludge as organic fertilizer, mainly because it opens the door for many ignorant traders to use substandard sludge to make fertilizer.
Land use of sludge composting (aerobic fermentation) products ≠using for organic fertilizer and agricultural use
There are a lot of ways of land use: agricultural use, afforestation, grassland improvement, soil improvement, soil repair, mine repair, and so on. Organic fertilizer is mainly used at crops and so on, the difference is very big.
China has a vast territory and abundant resources. There are too many barren mountains, poor soil, and polluted soil that need revitalizing. Can organic manure, as an expensive fertilizer product, be used for this purpose? Isn’t it nice to make use of the products formed after fermentation of other organic matter?
Therefore, banning sludge in organic fertilizer does not ban the aerobic fermentation of sludge.
Sludge treatment must also follow the principle of “adapting measures to local conditions”, choose the right technique, not the expensive technique.
In a word,
1.Organic fertilizer NY525-2021 standard prohibits sludge to be used for organic fertilizer, but there is no ban on agricultural use, land use of the sludge.
2.The treatment and the utilization of the sludge should be in line with the principle of taking measures according to local conditions and choosing suitable technologies and disposal methods.
3.The sludge disposal standard shall be in response to the standard requirements of various documents. Such as “Agricultural Sludge Contamination Control Standard” GB4284-2018, “Urban Sewage Treatment Plant Sludge Disposal for Landscaping” GB/T23486-2009, “Urban Sewage Treatment Plant Sludge Disposal for Land Improvement” GB/T24600-2009, “Urban Sewage Treatment Plant Sludge Disposal for Agricultural Use” CJ/T309-2009, “Urban Sewage Treatment Plant Sludge Disposal for Wood Land Use” CJ/T-2010.