Method of resourcefully utilizing sludge containing manganese, aluminum, and iron in water treatment plant

Abstract

The invention discloses a method of resourcefully utilizing sludge containing manganese, aluminum, and iron in a water treatment plant. The method comprises the following steps: taking sludge containing manganese, aluminum, and iron in a water treatment plant as the raw material; dehydrating the sludge at first to obtain dry sludge; then adding fly ash obtained in a power plant and sulfuric acid in sequence to carry out an acidifying treatment to obtain an acidified material; then adding kaolin, utilizing sodium silicate to adjust the silicon/aluminum ratio of the silicified material to 1:1, allowing the system to stand still to carry out reactions for 7 days, drying the sludge in the air or baking the sludge to obtain a dry material; heating the dry material to a temperature of 400 to 500 DEG C, burning the dry material for one hour, and naturally cooling the dry material to obtain a material with an adsorbing performance. The wastes are fully utilized. Sludge, fly ash, and cheap kaolin are used to prepare an adsorbent, and the wastes are utilized and converted into resources. The obtained adsorbing material has good adsorption activity, can absorb organic substances, phosphor, and heavy metal ions, and can be directly used in the wastewater/sewage treatment field.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a resource utilization method of manganese-aluminum-iron-containing sludge in a water purification plant. Background technique [0002] Due to the high manganese content in geology, coupled with the continuous reduction of water environment quality and the increase of production and living water intake, manganese in source water quality in many parts of my country has seasonally exceeded the standard, especially in water plants that use reservoirs as water intake sources. For water plants with manganese in the source water exceeding the standard, the most effective and simplest process at present is to add a strong oxidizing agent, such as potassium permanganate, ozone, etc. to oxidize the soluble manganese (ie Mn2+ ions) in the source water into manganese dioxide, Manganese is insoluble in water and can be removed in subsequent coagulation and sedimentation processes an...

AI Technical Summary

Problems solved by technology

For general water purification plants, if manganese is not included, the main inorganic components of the sludge are iron, aluminum precipitates and a small amount of inorganic substances (mainly silicates) brought by the source water colloid, so acidification treatment can be developed as Iron and aluminum salt coagulants, but for sludge with high manganese content (the main component is MnO 2 ), this development method is unreasonable, because MnO 2 Insoluble in acid and alkali, and Mn 4+ Ions cannot exist stably in water

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