A method for degrading artificial sweeteners from sewage, the method including: 1) introducing sewage to a secondary sedimentation tank and precipitating sediments; 2) collecting a supernatant from the secondary sedimentation tank, adding a NaOH solution or a perchloric acid solution to regulate the pH; adding an H.sub.2O.sub.2 solution to the supernatant to adjust a ratio of a molar concentration of H.sub.2O.sub.2 to a molar concentration of the sweetener in the resulting mixed solution to be between 1:1 and 30:1; transferring the resulting mixed solution to a photoreactor, irradiating the mixed solution by ultraviolet light, and stirring the mixed solution for between 5 and 30 min; and adding a 1.5% w/w aqueous NaNO.sub.2 solution to the mixed solution; and 3) collecting and analyzing an effluent obtained from 2), contacting the effluent with ClO.sub.2 for reaction in a disinfecting tank, and discharging the product.

Constructs having membrane proteins stabilized by functionalized beta-sheet peptides are provided. The constructs can be associated with or covalently linked to supports. The support can be a membrane. The membrane can be used to selectively move desired particles from one side of the membrane to the other while impeding passage of undesired particles through the membrane. Methods of making and using such constructs and membranes are provided.

The invention provides a treatment system and a treatment method for PMIDA high-salinity wastewater. The treatment system includes a booster pump, a water inlet-outlet heat exchanger, a water inlet heater and an oxidation reactor, and the water inlet-outlet heat exchanger is provided with a wastewater inlet, a wastewater outlet, an oxidized water inlet, and an oxidized water outlet. An oxidized water from the oxidation reactor enters the water inlet-outlet heat exchanger through the oxidized water inlet, the oxidized water outlet is connected to an intermediate tank, the wastewater inlet is connected to the booster pump, and the wastewater outlet is connected to a wastewater heater. A micro-interface unit is disposed at the lower part in the oxidation reactor, for dispersing crushed gas into bubbles. A gas inlet is formed at a side wall of the oxidation reactor and is connected to the micro-interface unit through a pipeline.

The present invention relates to a method for sludge safe disposal and resource recovery through sludge liquefaction and stratification. The method is to completely liquefy the organic matters in the sludge into soluble organic matters through a thermal-alkaline synergistic treatment. After the treatment, the sludge is stratified, and an anaerobic digestion is performed on a high-concentration soluble liquid of an upper layer to convert organic carbon, nitrogen and phosphorus into biogas, ammonia nitrogen and phosphate, a crude protein recovery is performed on a sludge protein of a middle layer, and a dewatering and a landfill on a sludge inorganic solid of a lower layer.

The present invention provides a method of reducing and controlling a hazardous substance in a process of high-value biological conversion of an urban organic waste. The method includes: 1) mixing a sludge, a first urban organic waste and an organic acid with water for acclimation to obtain an acclimatized sludge; 2) stage 1 of biological conversion: mixing the acclimatized sludge with a second urban organic waste to perform anaerobic culture; 3) stage 2 of biological conversion: adding nitrate and bacteria to continue anaerobic culture so as to obtain an organic acid. In the present invention, sludge microbes are acclimatized and then added to high-value chemicals such as acetic acid, propanoic acid and lactic acid prepared in biological conversion of the urban organic waste and then added with bacteria. Thus, by controlling pH value, microbe addition amount and nitrate concentration, the unfavorable effect of the antibiotics and heavy metal ions.

A multi-step method for producing an algae product comprising, a microorganism consumption step, another step, and an algae product collection step. The microorganism consumption step comprises, combining a liquid growth medium comprising microorganisms with a phagotrophic algae capable of producing a desired algae product, consuming said microorganisms by said phagotrophic algae, and growing said phagotrophic algae. Another step comprises either a microorganism growth step or a photosynthetic algal growth step. A microorganism growth step comprises providing a liquid growth medium comprising nutrients and microorganisms capable of said consuming said nutrients, consuming said nutrients by said microorganisms, and growing said microorganisms. A photosynthetic algal growth step comprises providing a substantially organic nutrient depleted liquid medium, providing a microorganism population comprising said phagotrophic algae, photosynthetic growth of said phagotrophic algae. An algae product collection step comprises collecting a desired algae product from said phagotrophic algae.

The embodiments described herein include an apparatus for adapting an existing water fountain having a water supply line and an existing bubbler assembly for dispensing water to a filtered water fountain. The system includes an adapter base in fluid communication with the water supply line, a housing assembly secured to the adapter base, and a bubbler head assembly secured to the housing assembly for dispensing water. A filter cartridge assembly is disposed within the housing assembly and is in fluid communication with the adapter base and the bubbler head assembly.

A method of removing from water at least one of algae, bacteria, toxins produced by algae, toxins produced by bacteria, and algae nutrients by placing an open-cell foam material into the water, leaving the material in the water for sufficient time to adsorb/absorb at least one of algae, their toxins, and their nutrients, and then removing the open-cell foam material from the water.

Provided is a sterilization method for a water system, the sterilization method being capable of suppressing the production amount of a nitrosamine compound while exhibiting a sufficient sterilization effect in precursor-containing water that contains a nitrosamine compound precursor. In the sterilization method for a water system, a stabilizing composition containing a bromine-based oxidizing agent or a chlorine-based oxidizing agent and a sulfamic acid compound is added to the precursor-containing water that contains the nitrosamine compound precursor.

A method for treatment of mixed electroplating wastewater without a cyanide and a phosphorus-containing reductant without a cyanide and a phosphorus-containing reductant. A ferrous chloride solution is added into electroplating wastewater without a cyanide and a phosphorus-containing reductant. The pH of wastewater is adjusted to 10.5-12. Pollutants such as sodium cyanide and hydroxyl-containing organic amine complexants are oxidized with sodium hypochlorite. Carboxyl-containing organic acid complexants are precipitated. Hexavalent chromium is reduced to trivalent chromium to form chromium hydroxide precipitate. Precipitate is removed by filtering and wastewater is adjusted to pH 4.5-5.5. Heavy metal ions are precipitated with sodium dimethyldithiocarbamate or sodium diethyldithiocarbamate. Precipitate and heavy metal capturing agents are adsorbed with activated carbon followed by removal of precipitate. Wastewater is adjusted to pH 6-8. Aliphatic polyamine complexants are destroyed using an available biological degradation technique to reduce chemical oxygen demand.