The invention relates to technology for processing liquid radioactive waste containing, inter alia, tritium isotopes, which are formed in various nuclear industry plants, and also during decommissioning of such plants. The technical result of the claimed invention consists in simplifying the technological procedure for processing liquid radioactive waste containing, inter alia, tritium isotopes by excluding complicated and lengthy operations associated with testing a concrete mixture produced from deactivated liquid radioactive waste, and also in increasing the ecological safety by reducing the size of areas for storage of the waste produced during the processing of the liquid radioactive waste. The claimed technical result is achieved in that a method for processing liquid radioactive waste containing, inter alia, tritium isotopes involves removing radioactive substances from the liquid radioactive waste so as to produce a low-level waste solution, and introducing a binder into the low-level waste solution produced in order to prepare a concrete mixture which complies with structural, radioecological, and sanitary and hygiene requirements, wherein components that have a negative effect on the technical characteristics of the concrete mixture being produced are removed from the low-level waste solution before the binder is added.

Disclosed herein are methods for treating wastewater grit to inactivate any pathogens that are present in the grit and for forming a solidified material comprising wastewater grit such as a chemically bonded phosphate ceramic (CBPC). The CBPC may be utilized in methods for repairing depressions in a road surface that include applying the uncured CBPC to the depression in the road surface and allowing the CBPC to cure.

A method of using a pelletized composition for liquid solidification and moisture retention includes the steps of: Providing a pelletized absorption material having i) at least 60% by weight agricultural fibers; and ii) 0.1-20% by weight superabsorbent polymer, wherein the pellets are substantially uniform and have a density of less than 40 LBS/Cubic Foot; and Blending the pelletized absorption material with one of i) Sludge, ii) Landfill leachate; iii) material used in hydroseeding; iv) grass seeds, fertilizer, and/or mulch to form a soil amendment; v) settling pond; and vi) wastewater streams.

This invention relates to a process for treating acid mine drainage (AMD). The process includes the steps of adjusting the pH of the AMD to be in the range of 3 to 5; adding maghemite nanoparticles to form a slurry; and a) aerating the slurry obtained in step 3), or b) simultaneously heating and mixing the slurry obtained in step 3). Thereafter maghemite nanoparticles loaded with one or more metals and sulphate and precipitated metals is separated from the slurry.

The invention includes a system and method for delivery and storage of an absorbent for solidification of liquid waste. The system includes a plurality of nestable containers configured to receive aqueous liquid to be solidified and forming a packet safe space when nested one within another. The system also includes a plurality of packets at least partially soluble in the aqueous liquid to be solidified. The containers include at least one packet and each packet contains a solidifier for use as an absorbent composition for the aqueous liquid to be solidified. A packet may be housed within the containers inside a packet safe space. The invention also includes an improved system and method for packaging a solidifier for solidification of liquid medical wastes.

A process of treating sewage sludge and the formation of a granular product thereof, wherein said process comprises utilizing a urea-formaldehyde resin to treat a sludge product from thermal hydrolysis processes (THPs) to create an end product for agricultural and other uses. The process utilizes a high intensity mixing and chopping reactor, which combines the sludge with a resin and utilizes sulfuric or other mineral acid to polymerize the resin. The resultant product is subsequently dried and sized through a screening process. The process results in an end product that is a granular fertilizer that is substantially dehydrated and a substantial portion of the nutrients having low solubility and slow release rates. This reduces or eliminates the loss of plant nutrients to water runoff effects. The novel process results in a product that is a low-odor, enhanced fertilizer useful for the processing and utilization of sewage sludge for agricultural and other purposes.

The invention relates to a tailings settling-dewatering-solidifying device and an experimental method thereof, which falls into the technical field of mine engineering and mine geotechnical engineering, comprising a tailings settling device including a water tank, charging barrels I and II, and a reaction tank made of a transparent material, a dewatering device including an intelligent type controller, a circular base, a gas cylinder, a permeable stone, a piston, a metal rod and a water return barrel, a solidifying device including a charging barrel III and a tailings barrel, a stirring system including a stirrer, a rotary shaft and an electric motor, a dynamic real-time monitoring system including a high-definition electronic camera and a computer, and a three-layer framework. Through integration of tailings settling-dewatering-solidifying, the device can effectively improve tailings treatment efficiency, facilitate data collection and analysis, adjust medicament concentration in real time, meet enterprises' requirements, and reduce enterprise cost.

“VINASSE TREATMENT PROCESS BY FLOTATION IN FLOW”, more precisely, it is a vinasse treatment process, by high performance flowing flotation system in industrial plants' facilities, resulting in obtaining concentrated vinasse sludge and treated vinasse, being said process comprised by vinasse treatment, which consists of treatment steps performed inside flotation tank, which comprises succession of coagulation systems and basins, flocculation, combined with aeration and oxygenation, in addition to a system of nano and micro bubbles in flotation basin, in which vinasse naturally flows into its storage tank, being said process results in formation of surface sludge and treated vinasse.

A process for the treatment of thick fine tailings that include constituents of concern (CoCs) and suspended solids is provided. The process includes subjecting the thick fine tailings to treatments including chemical immobilization of the CoCs, polymer flocculation of the suspended solids, and dewatering. The chemical immobilization can include the addition of compounds enabling the insolubilization of the CoCs. Subjecting the thick fine tailings to chemical immobilization and polymer flocculation can facilitate production of a reclamation-ready material, which can enable disposing of the material as part of a permanent aquatic storage structure (PASS).

The invention relates to a method and an arrangement for wastewater treatment, in which at least portions of the sewage sludge contained in the wastewater (0) are subjected to a hydrolysis (8). The hydrolysis (8) is carried out as a thermal hydrolysis. After the hydrolysis step (8), a drying process is (19) carried out. The drying process (19) is a process operating with positive pressure in the steam region. At least parts of the steam resulting from the drying process (19), which operates with positive pressure, are fed (20) to the portions of the sewage sludge in the thermal hydrolysis (8).