A slurry product is shown for treating water to both soften the water and to remove silica. The slurry is prepared by blending, in an aqueous medium, hydrated lime under the form of a slurry or of a powder with at least partly hydrated dolime, or magnesium hydroxide or magnesium oxide particles or a combination thereof under the form of a slurry or of a powder, to form an aqueous slurry where the amounts of the dolime, magnesium hydroxide or magnesium oxide particles or the combination thereof are provided such that the solid content of the slurry is up to 60% by weight of the slurry. The slurry also maintains a stable and pumpable viscosity for over a month.

The present disclosure relates to a wastewater flue evaporating device. An wastewater evaporation crystallizer is provided, including an evaporating tube inlet, an inlet flange, an inlet chamber, a pneumatic inlet baffle, an evaporating tube body, a pneumatic outlet baffle, an outlet chamber, an outlet flange, and an evaporating tube outlet which are successively coupled, where the evaporating tube inlet is connected to provide a gas pipeline; the gas pipeline is connected on a flue between an external denitration device and an air preheater; the evaporating tube outlet is communicated with an inlet flue of a dust collector; the evaporating tube body is provided with a wastewater nozzle; and the wastewater nozzle is communicated with a pretreated waste pipe. The present disclosure provides an efficient and energy-saving wastewater evaporation crystallizer which increases evaporation efficiency by bringing in a high-temperature gas at a front end of the air preheater.

A method and an apparatus for maintaining a stable microbial community in a combined anaerobic-aerobic waste processing system. The system comprises cycling of waste activated sludge between reactors, thereby ensuring a healthy microbial community and an efficient waste decomposition.

The present disclosure relates to a method for treating and recycling, in an environment-friendly manner, sludge and waste water generated in a process for crushing waste concrete and recycling waste concrete into aggregates. Sand is separated from sludge configured from cement components and sand components and is recycled as fine aggregates, and the cement components can be used as concrete admixtures. Furthermore, the present invention introduces a mineral carbonation technique and thereby allows pH of waste water to satisfy an environmental standard and allows high value calcium carbonate to be produced.

A process is described for treating water, in particular for obtaining ultrapure water, in which a decationized water stream is passed at least through a first strong base anion exchange bed and a second strong base anion exchange bed, which is arranged downstream, in particular directly downstream, of the first strong base anion exchange bed. Furthermore, a water treatment system and a counter-current ion exchange unit for carrying out such a process are described.

A process for remediating salt-impacted soils includes forming a heap of salt-impacted soil on an impermeable surface; irrigating the salt-impacted soil heap with at least one amendment solution; and collecting a leachate containing sodium ions at a base of the heap. A system remediates salt-impacted soil.

Disclosed herein are methods and systems for removing carbon dioxide (CO.sub.2) from water and quantifying the carbon so removed, thus facilitating valuation of that carbon for schemes (e.g., Kyoto agreement) that attach financial rewards for capture, sequestration or removal of carbon or CO.sub.2.

The present invention relates to a treatment system having a barium carbonate (BaCO.sub.3) dispersed alkaline substrate (BDAS) for use in the remediation or at least partial remediation of mine drainage (MD) and/or environmental media contaminated with a source of MD. The invention utilizes chemical, biological and combined treatment systems remove high concentrations of sulfates, hardness, heavy metals and N-compounds, that may exist in the MD as well as high concentrations of alkalinity produced during the remediation process. The invention further extends to a process for treating MD and/or environmental media contaminated with MD and to an apparatus for use in this process.

Unconventional hydrocarbons production from shale and tight-sand formations unlocks vast new energy sources to the nation. However, public perception about excessive potable water use in hydro-fracturing and possible pollution routes in discharging and reusing produced water (flow-back water) promotes state's stringent regulations and opens the door to develop effective produced water treatment methods. This invention is therefore aimed at properly treating produced water to avert health and environmental liabilities and convert economic losses to useful by-products using innovative methods to de-oil, de-scale, and de-salt produced water.

An apparatus including a fine-array porous material with a specific surface area higher than 10/mm, the specific surface area depending on different pore sizes, wherein the porous material comprises a plurality of pores having a substantially uniform size with a variation of less than about 20%, wherein the size is larger than about 100 nm and smaller than about 10 cm. The high-buoyancy apparatus can be part of a water vehicle such as a boat or a submarine, and the fine-array porous material is configured to reduce friction and/or control buoyancy. A conduit is also provided employing a fine-array porous material to reduce friction and/or control buoyancy. A garment is provided taking advantage of water repellant and/or UV/IR reflection properties of the fine-array porous material.