The future development trend of sludge dewatering technology
Source：Jiangsu Envset Time:24 June 2021
The current is an era of rapid development and widespread use of biotechnology. There are many research results in the biological field, and the research results in the microbiological field can be used in sewage treatment and sludge dewatering in chemical enterprises. Incorporating biotechnology into sludge dewatering technology can improve the efficiency and effectiveness of sludge dewatering. Different microorganisms have different characteristics. The sludge of chemical enterprises contains a lot of organic matter. This kind of environment is very suitable for microbial operations. Microbes can decompose macromolecules of organic matter in sludge into small molecules, and convert toxic macromolecules into non-toxic or low-toxic small molecules. In addition, microorganisms can improve the dewaterability of sludge, making it easier to perform the filtration process of the filtration method in the mechanical dehydration method and the centrifugal process of the centrifugal method.
In addition to good equipment for sludge dewatering, corresponding measures must be taken. It is hoped that its research and construction can be combined with the outstanding problems faced by sewage treatment plants.
First, can the sludge problem be solved simultaneously?
Can the problems of malodor and energy utilization be solved in an integrated manner? In sewage treatment, sewage and sludge are still treated separately. Can the sewage and sludge be recycled for integrated treatment? Or simultaneously promote the reduction of sludge production and prevent secondary pollution. If this is not possible, it is also best to treat the sludge to facilitate transportation and reduction for further disposal.
Second, can we consider integrating sewage treatment with the treatment and disposal of livestock and poultry farming wastewater and kitchen waste? These wastewaters and wastes were originally treated in a decentralized manner. If energy circulation can be realized and they can be used in accordance with local conditions, they can provide energy and nutrients for sewage treatment.
Third, can you consider combining the construction of a sewage treatment plant with the renovation of an old sewage treatment plant? At present, there are about 4136 urban sewage treatment plants nationwide, with a processing capacity of 161 million cubic meters per day. Many sewage plants need to be upgraded. If the research and demonstration of the sewage treatment concept plant can be combined with the upgrading of the old sewage treatment plant, it will be helpful to my country's sewage treatment work.
Fourth, can the level of self-control of the sewage treatment plant be improved? Including sewage treatment facilities in rural areas and industrial parks, industrial parks now have a very large amount of sewage treatment, and more advanced control technologies, including Internet of Things technology, information technology, and sensor technology, should be used to improve the operation and management level of the entire industry.
Sewage treatment discharge standards are being revised, and local standards will be the focus in the future. This standard should be adapted to local conditions, reflect the requirements of pollution discharge permit management, and reflect the characteristics of river basins, location characteristics and many other factors.
At present, my country's sewage discharge standards are gradually tightening. In particular, the management of pollution permits is now being promoted. Permit management is based on the maximum daily discharge load of the basin, and stipulates the emission standards of the emission sources. Each plant has its own emission requirements.
Therefore, the future development trend of sludge dewatering technology is bound to be organic integrated biotechnology, and the use of biotechnology can be more efficient and lower cost. The by-products after sludge dewatering will be more widely used to realize resource reuse. The sludge produced by chemical companies has a large organic content and a large amount of nutrients. After being treated in a non-toxic and reducing toxicity process, the dried sludge has a high utilization value. Now, chemical companies have used it in farmland fertilization, and practice has proved that the fertilization effect is excellent; some chemical companies further process the dried sludge so that it can be burned as energy and provide power and energy for chemical companies; The latter sludge is a good filling material, which can be used to fill foundations and reinforce buildings.
All in all, with the continuous improvement of the industrial level, the strength of chemical companies will also continue to improve, and the ways to reuse dewatered sludge will become more and more extensive. Chemical companies can better play the value of waste reuse and create more high economic benefits.
Tag: sludge dewatering technology,development trend of sludge dewatering technology