A filter-aided sediment conditioner for river and lake ecological dredging sediment plate and frame filter press dehydration
A technology of plate and frame filter press and conditioning agent, which is applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., and can solve problems such as restricting the application of plate and frame filter press technology.
Active Publication Date: 2021-01-12
CCCC TIANJIN ECO ENVIRONMENTAL PROTECTION DESIGN & RES INST CO LTD
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Problems solved by technology
However, the curing agent will cause the filter press mud cake and filter press water to be strongly alkaline, and the press filter water after dehydration of river and lake polluted sediment is still industrial wastewater, and the filter press mud cake is still industrial solid waste, which seriously restricts Application of plate and frame filter press process
Method used
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Experimental program
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Effect test
Embodiment Construction
[0012] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.
[0013] The area of a certain lake is about 300 square kilometers, the water area to be treated is about 0.5 square kilometers, the water content of the sediment is about 60%, the polluted sediment is muddy clay, and the main pollutants are nitrogen and phosphorus pollution, of which the nitrogen content is 4.4mg / kg, phosphorus The content of organic matter is 1205mg / kg; the content of organic matter in the polluted sediment of the lake is relatively high, and the average organic matter content is about 38.2mg / kg. According to the adsorption and desorption test and the inflection point method, the average thickness of the polluted sediment of the lake is about 0.7 meters, and the total amount of the contaminated sediment is estimated to be about 550,000 tons. The volume is about 105,000 tons.
[0014] Provide 2400 tons of filter aid bottom mud c...
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Abstract
The invention discloses a filter-aid bottom mud conditioner for plate-and-frame filter pressing dehydration of river and lake ecological dredging sediment. The filter-aid bottom mud conditioner comprises a sediment conditioner A, a sediment conditioner B and a sediment conditioner C, wherein the sediment conditioner A comprises aluminum chloride and ferric sulfate, the sediment conditioner B comprises sodium silicate and calcium silicate, the sediment conditioner C comprises bentonite and desulfurized gypsum, and the aluminum chloride, the ferric sulfate, the sodium silicate, the calcium silicate, the bentonite and the desulfurized gypsum are all solid powder. The filter-aid bottom mud conditioner for plate-and-frame filter pressing dehydration of river and lake ecological dredging sediment can effectively accelerate mud-water separation, does not influence the pH value of mud water, greatly reduces the addition amount, and is low in cost, the sediment subjected to mud-water separationcan be used for backfill soil or greening planting soil, and recycling and sustainable utilization of river and lake sediment is realized.
Description
technical field [0001] The invention relates to the field of ecological dredging of rivers and lakes, and more specifically relates to a filter-aiding sediment conditioner for river and lake ecological dredging bottom mud plate frame filter dewatering. Background technique [0002] When plate and frame filter press is used to dewater river and lake ecological dredging sediment, a curing agent is usually used to improve the dewatering efficiency. However, the curing agent will cause the filter press mud cake and filter press water to be strongly alkaline, and the press filter water after dehydration of river and lake polluted sediment is still industrial wastewater, and the filter press mud cake is still industrial solid waste, which seriously restricts Application of plate and frame filter press technology. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a filter-aiding bottom mud conditi...
Claims
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IPC IPC(8): C02F11/143C02F11/145C02F11/122
CPCC02F11/122C02F11/143C02F11/145
Inventor 胡保安黄佳音杨旺旺刘璟肖博张海涛王占军
Owner CCCC TIANJIN ECO ENVIRONMENTAL PROTECTION DESIGN & RES INST CO LTD