The present application is related to a method for controlling heavy metal scouring pollution in mines by using a humified product, which comprises steps of: (1) carrying out mixed fermentation on sludge and hyperthermophiles to breed polar humified groups, and then carrying out mixed fermentation on the fermented material and a native material of humus precursors to induce massive production of humus until the humus content reaches a required standard; and (2) mixing and maintaining the humified product of the sludge reaching the standard with mine soil polluted by heavy metals to remedy the polluted mine.

The present disclosure relates to processes for treating wastewater such as acid rock drainage. The processes may, for example, comprise subjecting the wastewater to a microbial fuel cell process, neutralizing the acid with a base comprising calcium to produce an aqueous composition comprising calcium ions and subjecting the aqueous composition comprising calcium ions to a biological precipitation process to precipitate the calcium ions as calcium carbonate.

The present invention discloses a method for starting a single-stage system for nitrogen removal coupling partial denitrification and anammox. The two nitrogen removal processes are coupled by gradually enriching denitrifying bacteria in anammox granular sludge and then activating the partial denitrification process of the functional bacteria (denitrifying bacteria). Particularly, the method comprises: inoculating anammox granular sludge in a single-stage reactor, adding an organic carbon source in gradients to enrich denitrifying bacteria and to adapt anammox bacteria, and replacing nitrites in feed with nitrates gradually to activate the partial denitrification process.

The present invention relates to a method for treating wastewater containing a furan compound, a microbial preparation for use in the method, a method for high density culture of a microorganism for use in the above method, and a method for producing a microbial preparation by using the culture method.

A method for reducing toxic mercury in wastewater effluent comprises the steps of: identifying a system into which wastewater effluent is introduced, the wastewater effluent including organic compounds and organomercurial compounds; producing a treatment composition comprising a solution including a surfactant, digestive microbes suspended in the solution, and mercury-transformative microbes suspended in the solution; and providing the treatment composition into the system containing the wastewater effluent, such that the digestive microbes degrade the organic compounds in the wastewater effluent, and the mercury-transformative microbes reduce the organomercurial compounds in the wastewater effluent into nontoxic volatile elemental mercury. In certain systems for reducing toxic mercury in wastewater effluent, a biological capture medium is positioned within a vessel and configured to provide a capture point for microbes to adhere to and create biofilms. One such system is a dental evacuation system in which wastewater effluent is introduced into the system via an aspirator.

A spore germination composition and method to produce a bioaugmentation solution that is added to an anaerobic digester or partially aerobic digester to increase biogas production. A nutrient-germinant composition comprises L-amino acids a phosphate buffer, an industrial preservative, and an optional source of potassium. The composition and spores of one or more Bacillus species are heated to a preferred elevated temperature range of 35° C. to 60° C. for an incubation period of around 20 to 60 minutes to form a bioaugmentation solution that is dispensed to the digester, preferably to the hydrolysis stage of the digester. A dose of bioaugmentation solution is added to the digester around once per day in an amount to provide at least 1000 CFU per mL of the full volume capacity of the digester, which can increase methane production by around 5 to 10% over operation of the digester without the bioaugmentation solution.

Described herein are methods for eliminating biuret from an environment such as a body of water, through treatment with an effective amount of a hypochlorite. Additionally described herein are methods of eliminating biuret resulting from enzymatic degradation of CYA in an aqueous solution.

The present disclosure belongs to the technical field of water body treatment, and particularly relates to a method for enhancing biological denitrification based on the addition of exogenous β-cyclodextrin. Preferably, Paracoccus denitrificans and β-cyclodextrin are added for biological denitrification enhancement. In the present disclosure, the β-cyclodextrin is exogenously added to a denitrifying medium to construct a denitrification system, so that the denitrification rate of microorganisms may be increased and the production of harmful denitrification intermediate products is reduced.

The invention relates to a method for aerobic and anaerobic cultivation of microorganisms. The invention also relates to a method for producing a preparation for cleaning contaminated liquids and surfaces. Likewise, the invention relates to a method for cleaning contaminated liquids and surfaces.

The present invention relates to a process and plant for treating feed water containing nitrate. The process includes, sorbing nitrate from the feed water onto an ion exchange resin to form a loaded resin and produce a treated water stream depleted in nitrate, regenerating the loaded resin so that the resin can be reused and produce a brine stream high in nitrate; and converting nitrate in the brine stream into molecular nitrogen gas with the assistance of a bioactive agent.