The annual production of wet sludge in China is expected to reach around 35 million tons in 2015, “said Pang Zhongda in an article titled” Prospects for the Next Decade of China’s Solid Waste Subdivision Field “published by Zhang Yi, President of Shanghai Institute of Environment, on August 29th.
The surge in the sludge disposal market has broadened the development space for filter press manufacturing enterprises, and expanding production capacity and improving research and development capabilities have become the focus of development for such enterprises.
The ultra-high pressure deep dewatering technology developed by Foshan Jinkaidi Filtration Equipment Co., Ltd. (hereinafter referred to as Jinkaidi), where Pang Zhongda is located, can effectively reduce the moisture content of sludge treatment, lower the environmental protection costs of enterprises, and improve the reuse rate of sludge resources.
The market size of sludge disposal will skyrocket
According to the “2013-2017 China Sludge Treatment and Disposal Deep Research and Investment Strategic Planning Analysis Report”, more than 2500 urban sewage treatment plants have been built in China in 2010, with a daily sewage treatment capacity of 122 million tons. However, a large amount of excess sludge has also been generated. Calculated based on a moisture content of 80%, the total annual sludge production in the country will soon exceed 30 million tons, and the situation of sludge treatment is severe.
The next few years are predicted by the industry to be the explosive period of the sludge disposal market, and it is expected that the market size of sludge disposal may reach about 100 billion tons within five years.
Compared to the increasingly expanding market size, the development problem of the industry in China, which is characterized by a small number, scale, and strength of enterprises specializing in sludge disposal, is prominent. Compared to the urban sewage treatment rate of over 75%, the current harmless disposal rate of sludge in China is less than 35%, indicating a backward level of development.
In sludge treatment methods, the mechanical dewatering of sludge, which reduces the volume of sludge treatment and improves the reuse rate, is significant. After dewatering, sludge can be disposed of through land use, sanitary landfill, building materials utilization, and drying incineration.
Ultra high pressure treatment technology helps with environmental protection
Moisture content is an important indicator of the degree of sludge treatment. “Moisture content directly affects the difficulty of transportation and later disposal for enterprises, and sludge with high moisture content is prone to produce odors, permeate, etc., causing secondary pollution,” industry insiders said.
The moisture content of the sludge cake produced by traditional sludge dewatering technology is about 80%, while the moisture content of the sludge cake produced by general sludge deep dewatering technology and ultra-high pressure deep dewatering technology is 80% and 40-45%, respectively. Compared with traditional technology, the equipment investment and operating cost of ultra-high pressure deep dewatering technology are lower.
Industrial sludge is generally handed over to qualified third-party companies for post-treatment after dehydration. The transportation cost is calculated based on the weight of the sludge cake. Calculated based on the annual production of 1 million tons of sludge by the enterprise, the transportation cost of sludge cake with a moisture content of 45% is three times lower than that of sludge cake with an 80% moisture content. The overall volume of subsequent treatment such as landfilling is reduced by three times, and the leachate generated after landfilling is reduced by more than 50%, greatly reducing the pollution caused by post-treatment, “said Pang Zhongda.
The high dryness dewatering special filter press and high-pressure high-efficiency filter press developed and manufactured by Jinkaidi apply ultra-high pressure deep dewatering technology, mainly serving industries such as printing and dyeing, papermaking, leather, ceramics, municipal sewage, etc. “With the improvement of environmental protection requirements, the demand for sludge treatment by enterprises will increase. Foshan, where there are many ceramic and printing and dyeing enterprises, has a huge sludge market,” said Pang Zhongda. Currently, Jinkaidi provides equipment and services for many related enterprises in Foshan, and has established sludge treatment centers with qualified third-party companies.
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Foshan will become a filtration equipment technology output center
In 2012, Foshan Jinkaidi Filtration Equipment Co., Ltd. was recognized as a national high-tech enterprise. The ultra-high pressure technology used in its research and development of filter presses is significantly superior to other technologies in terms of energy conservation and environmental protection.
In the field of sludge treatment equipment technology in Guangdong and even South China, there is currently no enterprise with comparable strength to Jinkaidi. Last year, the company’s annual output value was nearly 80 million yuan, and Pang Zhongda’s goal is to achieve an output value of 500 million yuan within five years.
The prerequisite for increasing output value is the expansion of production capacity. According to Pang Zhongda, Jinkaidi will establish a 60 acre factory in Tiantai County, Zhejiang Province in March next year. “In the future, Foshan Company will serve as the company’s technology research and development center, providing intellectual services specifically for filter press production technology,” Pang Zhongda said.
Jinkaidi currently has 12 professional talents who have been engaged in the environmental protection industry for many years, and has long-term cooperation with universities such as Sun Yat sen University, South China University of Technology, and Guangdong University of Technology for research and development. It has core independent intellectual property rights and has accumulated 63 invention and utility model patents, including 2 international patents. The equipment and pre-treatment technology for sludge deep dewatering engineering are at the leading level in China.
The Pearl River Delta has a large number of talents and a diverse range of sludge market categories, which is conducive to the development of technology research and development work. However, placing the main production in Zhejiang and Jinkaidi is more for the purpose of further expanding the national and even international markets.