Earlier, due to the lack of attention to sludge treatment in China, the sludge treatment method was mainly used for dumping and landfill. With the understanding of the harm of sludge, the sludge treatment has been paid more and more attention. MOSYE moisture meter found that in 3 of the town sewage treatment plant sludge disposal policy, the different provisions of sludge treatment.

The pollutant discharge standard of urban wastewater treatment plant (GB18918-2002) suggested that the sludge of sewage treatment plant should be treated with sludge dewatering, and the moisture content after dehydration was less than 80%.

"Sludge treatment and disposal technologies of pollution prevention and control policy of urban sewage treatment (for Trial Implementation)" (city of [2009]23) in the sludge landfill has also made provisions: do not have the conditions of land use and building materials can be used to fill the disposal of sludge. The state will gradually restrict the disposal of untreated sludge in landfill. The sludge landfill should meet the requirements of the "urban sewage treatment plant sludge disposal mixed sludge landfill" (CJ/T 249). MOSYE moisture meter through the "urban sewage treatment plant sludge disposal mixed landfill mud" (CJ/T 249) found that the requirements of the landfill sludge moisture content of less than 60%.

The Ministry of environmental protection "Circular on strengthening the urban sewage treatment plant sludge pollution prevention and control work" (Central Office No. 2010157) proposed to store sewage treatment plant (i.e. not disposal) about sludge transported for the purpose of the factory sector, must be sludge dewatering to moisture content below 50%.

These three standards were issued in 2002, in 2009 and in the year of the year of the year, and the requirement of the sludge treatment was higher and higher in the year of. In fact, most of the sludge in our country is landfill disposal, but it is developing towards the direction of sludge utilization. From the current situation of China's sludge disposal, sludge treatment to water content below 60% is necessary, whether it is landfill or resource utilization, and toward the goal of moisture content of 50%.

Thus, water monitoring after sludge dewatering has become more and more strict, therefore, monitoring the water content of sludge, sludge water is recommended to use the MOSYE online instrument, simple operation, high precision; MOSYE moisture meter for higher measurement accuracy and!