Abstract: Disclosed are a method and a device for treating high ammonia-nitrogen wastewater using a microbial electrolysis cell (MEC) assisted SANI system, including an SANI system, an MEC and a power supply. The cathode chamber and anode chamber of the MEC are separated by a separator and are respectively connected to the cathode and anode of the power supply, and a cathode electrode is enriched with hydrogen autotrophic denitrifying bacteria. The cathode chamber has two main functions. Firstly, a higher denitrification efficiency is achieved due to the enriched hydrogen autotrophic denitrifying bacteria; and secondly, the alkalinity produced in the cathode can adjust the pH of the nitrification chamber. In addition, the cathode chamber can oxidize the residual sulfide in the effluent to meet the discharge standard. This system retains the advantage of less sludge in a SANI process, but also can be applied to the treatment of wastewater with high ammonia-nitrogen.

Abstract: Disclosed are a method and a device for treating high ammonia-nitrogen wastewater using a microbial electrolysis cell (MEC) assisted SANI system, including an SANI system, an MEC and a power supply. The cathode chamber and anode chamber of the MEC are separated by a separator and are respectively connected to the cathode and anode of the power supply, and a cathode electrode is enriched with hydrogen autotrophic denitrifying bacteria. The cathode chamber has two main functions. Firstly, a higher denitrification efficiency is achieved due to the enriched hydrogen autotrophic denitrifying bacteria; and secondly, the alkalinity produced in the cathode can adjust the pH of the nitrification chamber. In addition, the cathode chamber can oxidize the residual sulfide in the effluent to meet the discharge standard. This system retains the advantage of less sludge in a SANI process, but also can be applied to the treatment of wastewater with high ammonia-nitrogen.

Abstract: An improved oxazolidine-based hardener to be used with a resorcinol resin or a tannin resin as the adhesive for the bonding of wood articles. Preferably, an oxazolidine is combined with particulate silica, and the resin is combined with a base such as NaOH. The adhesive based on the improved hardener can be used to glue wood particles to pass wet strength requirements after the glue is cured at room temperature for under 24 hours. The improved hardener composition is storage stable; it can be prepared anytime before its use and, thus, eliminate the need to prepare a hardener immediately prior to the glue use. Since it is formaldehyde-free; it eliminates the safety issues associated with handling formaldehyde or paraformaldehyde. Also, the hardener provides flexible gel time or working time. Since the resins can be cured at room temperature, heating in an oven is not needed but could be used to reduce curing time. If radio frequencies are used to cure the resins, the exposure time can be reduced.

Abstract: An improved oxazolidine-based hardener to be used with a resorcinol resin or a tannin resin as the adhesive for the bonding of wood articles. Preferably, an oxazolidine is combined with a base such as NaOH and a powdered absorbent such as wheat flour. The adhesive based on the improved hardener can be used to glue wood particles to pass wet strength requirements after the glue is cured at room temperature for under 24 hours. The improved hardener composition is storage stable; it can be prepared anytime before its use, thus eliminating the need to prepare a hardener immediately prior to the glue use. Since it is formaldehyde-free; it eliminates the safety issues associated with handling formaldehyde or paraformaldehyde. Also, the hardener provides flexible gel time or working time. Since the resins can be cured at room temperature, heating in an oven is not needed but could be used to reduce curing time. If radio frequencies are used to cure the resins, the exposure time can be reduced.

Abstract: A process for preparing ashless and low-ash phenolic resole resins having no amine odor, and a process for preparing storage-stable mixtures or premix solutions of phenol-formaldehyde resin and urea or unrea-formaldehyde resins. These processes react phenol and formaldehyde in the presence of an effective catalytic amount of a low-volatile and strongly basic tertiary amino alcohol either alone or in combination with an inorganic base.

Abstract: The invention is concerned with novel ingestible cross-linked homopolymers having functional groups consisting of linear or branched amines, of the formula: ##STR1## and their pharmaceutically acceptable salts of the formulae: ##STR2## wherein P(or POLYMER .parallel.-) represents a hydrophobic, cross-linked and non-digestible homopolymer backbone; R is a hydrogen atom or a lower alkyl radical; X.sup.- is a pharmaceutically acceptable anion; m is an integer varying from 1 to 6 inclusive; and n, o and p are, independently, integers varying from 2 to 12 inclusive. The amine functionalized and cross-linked homopolymers of the invention are highly efficient adsorbents for bile acids and salts and can thus be used for reducing hypercholesterolemia in affected humans.

Abstract: The invention is concerned with novel ingestible polymeric amines in linear or branched form of the formula: ##STR1## and their pharmaceutically acceptable salts of the formulae: ##STR2## wherein P represents a hydrophilic, cross-linked and digestable polymer backbone; R is a hydrogen atom or a lower alkyl radical; X.sup.- is a pharmaceutically acceptable anion; m is an integer varying from 1 to 10 inclusive; and n, o and p are, independently, integers varying from 2 to 12 inclusive. The polymeric amines of the invention are highly efficient adsorbents for bile acids and salts and can thus be used for reducing hypercholesterolemia in affected humans.

Abstract: The invention is concerned with novel ingestible cross-linked homopolymers having functional groups consisting of linear or branched amines, of the formula: ##STR1## and their pharmaceutically acceptable salts of the formulae: ##STR2## wherein P represents a hydrophilic, cross-linked and non-digestible homopolymer backbone; R is a hydrogen atom or a lower alkyl radical; X.sup.- is a pharmaceutically acceptable anion; m is an integer varying from 1 to 10 inclusive; and n, o and p are, independently, integers varying from 2 to 12 inclusive. The amine functionalized and cross-linked homopolymers of the invention are highly efficient adsorbents for bile acids and salts and can thus be used for reducing hypercholesterolemia in affected humans.

Abstract: The invention is concerned with a metal ion coordinated polyamine resin in which a non-toxic, pharmaceutically acceptable chelating metal ion is coordinated with a cross-linked and non-digestible polymeric amine selected from the group consisting of: (a) polyamine resins with a hydrophilic backbone, of the formula: ##STR1## wherein P represents a hydrophilic, cross-linked and non-digestible homopolymer backbone, m is an integer varying from 1 to 10 inclusive, and n, o and p are, independently, integers varying from 2 to 12 inclusive; (b) polyamine resins with a hydrophobic backbone, of the formula:P'--[NH(CH.sub.2).sub.n ].sub.m NH.sub.2 (II)wherein P' represents a hydrophobic, cross-linked and non-digestible homopolymer backbone, m is an integer varying from 0 to 6 inclusive and n is an integer varying from 2 to 12 inclusive; and (c) cross-linked copolymers of a polyethylenepolyamine containing from 2 to 6 ethylene units and epichlorohydrin.