A process for the solidification of liquid waste prior to disposal in a landfill, and an impermeable container in which the liquid waste is solidified.

A method of removing sludge from a drain pipe used for cleaning a drain pipe comprises a piling step, a platform setting step, a drilling path planning step, a coil deploying step, a conveying bracket lifting step, a guiding step, a drilling step, and a cleaning step. In the piling step, a plurality of supporting columns are provided around the opening of the drain pipe. In the platform setting step, a work platform is provided on the plurality of supporting columns. In the drilling path planning step, a drilling path is planned. In the coil deploying step, an induction coil group is placed above the drain pipe. In the conveying bracket lifting step, a conveying bracket is hung by lifting equipment so that the conveying bracket is aligned with the opening of the drain pipe. In the guiding step, the drill bit is guided to the opening of the drain pipe using the conveying bracket. In the drilling step, the drill bit is controlled to drill into the clogged bulk in the drain pipe. In the cleaning step, the waste generated by drilling is cleaned.

A method of removing sludge from a drain pipe used for cleaning a drain pipe comprises a piling step, a platform setting step, a drilling path planning step, a coil deploying step, a conveying bracket lifting step, a guiding step, a drilling step, and a cleaning step. In the piling step, a plurality of supporting columns are provided around the opening of the drain pipe. In the platform setting step, a work platform is provided on the plurality of supporting columns. In the drilling path planning step, a drilling path is planned. In the coil deploying step, an induction coil group is placed above the drain pipe. In the conveying bracket lifting step, a conveying bracket is hung by lifting equipment so that the conveying bracket is aligned with the opening of the drain pipe. In the guiding step, the drill bit is guided to the opening of the drain pipe using the conveying bracket. In the drilling step, the drill bit is controlled to drill into the clogged bulk in the drain pipe. In the cleaning step, the waste generated by drilling is cleaned.

A deep sludge dewatering method using electroosmosis with filter bags, including (1) placing a filter bag on a slope on which a cathode electrode is arranged; (2) injecting sludge into the filter bag, and after the filter bag is filled with the sludge, closing an inlet of the filter bag; and (3) laying an anode electrode on the filter bag filled with the sludge, and connecting the cathode electrode and the anode electrode to a DC power supply via an electric wire, and carrying out energization for electroosmosis so that water flows down the slope. The present invention can be used for recycling of the sludge produced in underground and tunnel excavation projects, and has the advantages of large processing capacity, simple process, good treatment effect and available resource recycling.

Method of recovering iron and/or phosphorus from sludge of waste water treatment plants, said sludge being obtained after precipitation by iron salts, wherein said method comprises separating sludge from waste water and submitting said sludge to a lactic fermentation to release a liquid phase where iron and phosphorus are dissolved. Lactic fermentation is performed with addition of a co-substrate rich in carbon, preferably rich in carbohydrate, in one single step of biological acidification or a sequencing biological acidification in two steps by first releasing phosphorus from the PAO contained in the sludge. Iron can then be recovered by means of a cationic exchange resin. Phosphorus can be recovered as struvite or calcium phosphate from the remaining solution substantially free from iron ions, after a precipitation step in presence of a magnesium or calcium source and a pH above 7.

The present invention provides a method for treating wastewater or wastewater sludge, in which method percarboxylic acid is used as an odor controlling agent and/or corrosion controlling agent.

A continuous flow granular/flocculent sludge wastewater process selects for granule biomass capable of nitrogen and phosphorus removal and controls granule size and concentration of granular and flocculent sludge for optimal nutrient, organic, and solids removal in a smaller footprint. It includes anaerobic, anoxic, and aerobic process zones, a high soluble biodegradable COD loaded first reactor in anaerobic or anoxic zones, a granular sludge classifier with recycle of underflow granular sludge to the first reactor, a secondary clarifier to settle flocculent sludge and particulates and recycle of flocculent sludge from the secondary clarifier underflow to an aerobic process zone. Wasting of sludge from the two separate recycle lines controls the bioprocess flocculent and granular sludge concentrations and SRTs. Bypass around and recycle flow to the classifier to maintain desired flow under various influent flow conditions aid control of granule size. On/off mixer operation of anaerobic and anoxic reactors may be used.

The invention relates to a method for producing a binder from slag for conditioning sludges/dredged material, soils containing water and for the neutralization of acids. According to the invention, the slag from a waste incinerator is crushed, then metal is removed and the crushed slag is graded into a fraction greater than 2.0-3.0 mm and a fraction smaller than 2.0-3.0 mm, the fraction 0/2.0-0/3.0 mm is dried in a dryer to a terminal humidity less than 1.5 wt. %-2.5 wt. %, as a result of which the pozzolanic properties of the slag are reactivated, the yield from the dryer is further crushed in a high-speed impact mill to a stable cubic grain structure and the metal released in this process is removed, and the 0/500-0/750 m fraction forming the binder is separated from this crushed slag.

We provide a process for treatment of produced water, including but not limited to water produced by a steam flood process for extraction of oil from oil sands, including the removal of color from the water. This removal may be accomplished through addition of color-removal polymers and flocculents. This process may also be useful for other water treatment processes including reverse osmosis and filtration.

A process for removing water from particulate material slurries produced by horizontal drilling, vertical drilling and from dredging of bodies of water is disclosed. The process comprises a first step of water removal accomplished by diffusing a chemical reagent into the particulate material source stream that results in separating out a clean water fraction and a second step of reacting the sludge with a demulsifier and a superabsorbent polymer that locks onto the water in the remaining slurry thus turning the slurry into a solid crust. The crust is ground into a particulate form and disposed in a landfill. The combined effect of the treatments is the thickening of the particulate material slurry from about 10% solids to about 25% solids. The removed water may be used for further drilling and drinking. Another benefit is the reduced volume of the particulate material that needs to be disposed in landfills.