401results about "Liquid/slurry treatment" patented technology

A method and plant for the treatment of an organic waste material in liquid form, e.g. liquid manure from livestock, the method comprising filtering fibres and particles from the liquid, subjecting the liquid to anaerobic fermentation in a biogas reactor, separating a substantially sterile and particle-free permeate stream from the biogas reactor, e.g. using ultrafiltration, subjecting the permeate stream to treatment with an ammonia stripper at an elevated temperature and preferably at reduced pressure to remove substantially all ammonia and carbon dioxide and to result in an ammonia fraction and a nutrient salt fraction, and separating the nutrient salt fraction into a fertiliser concentrate fraction and a water fraction, e.g. using reverse osmosis. The end products of the method are clean water, ammonia concentrate, fertiliser concentrate containing salts of P and K, compost and high-quality biogas with a high methane content.

According to one embodiment of the invention, a system for processing biomass comprises a chamber, a biomass input device, a fluid input device, and a retrieval device. The chamber is defined by at least a bottom, at least one wall, and a cover supported by the at least one wall. The biomass input device operable to deliver biomass into the chamber to form a biomass pile. The fluid input device is operable to deliver fluid into the chamber to the biomass pile. The retrieval device operable to receive fluid from the chamber.

A process for removal and recovery of nutrients and recycling of water from digested manure or other organic wastes. A first step involves separating waste from an anaerobic digester into digested liquids, digested solids, and biogas. A second step involves precipitating solids from the digested liquids. A third step involves stripping ammonia from the digested liquids. A fourth step involves injecting an exhaust stream of carbon dioxide drawn from the co-generator into the digested liquids to reduce the pH and raise the temperature of the digested liquid. A fifth step involves recycling the digested liquids back to the anaerobic digester for use in diluting in coming solid wastes. A sixth step involves passing the excess ammonia stripped from the digested liquid through the digested solids to recover nitrogen through aborption with the resultant digested solids being usable as a biofertilizer with a high nitrogen content. A seventh step involves capturing the biogas for use in a co-generation system.

A process for the recovery of nitrogen from anaerobically digested liquid waste and for the collection of the nitrogen as nitrate compounds that can be used to produce fertilizer and compost, includes stripping ammonia from anaerobically digested liquid waste, and converting the ammonia into nitrates via nitrification.

This invention provides a waste-processing system capable of processing high-solids wastes such as manure. This invention provides a compact U-shaped digester that allows for recycling of activated sludge to improve the efficiency of the process. Efficiency is also improved through a sludge heating design that creates a current in the digester and efficiently heats the sludge. A composter is provided to further process the sludge through aerobic digestion to create usable fertilizer. Finally, one embodiment provides a turbine that is fueled by biological gases from the digester to generate heat and electricity to be used by the system.

A process for the treatment of liquid waste biomass, especially liquid manure compositions, wherein the biomass is converted to a fertilizer product. The process at least includes a nitrification step including a first biological conversion stage wherein ammonium is converted to nitrite using nitritifying bacteria in an aerated reactor, and a subsequent chemical oxidation stage wherein nitrite is converted to nitrate by heating the liquid waste biomass in an aerated reactor under acidic conditions. The process is particularly suitable for treating liquid manure, because of the high ammonium nitrogen contents thereof, which render the process essentially self-regulatory. In addition a process for the treatment of liquid waste biomass wherein organic matters are converted to energy sources, referred to as biogas and green cokes, and wherein nitrogen is fixed in a fertilizer product in the form of ammonium nitrate, is provided, the process including the present nitrification process.

The invention relates to a preparation method of a soluble fish protein ammonia acid fertilizer, belongs to the field of biological technical processing, and particularly belongs to the field of fertilizer additive preparation. The preparation method comprises the following steps: crushing and pulping leftovers from fishery product processing or deep-sea low-value shrimp into fish pulp, mixing with water, adding lactic acid bacillus and protease, and fermenting for 3-8 days respectively through continuous ventilation and interval ventilation at a temperature of 40-45 DEG C to obtain the soluble fish protein ammonia acid fertilizer. The preparation method disclosed by the invention is simple, and short in heating treatment time, so that the heating cost is saved and the loss of nutrient substances is reduced. The fish protein ammonia acid soluble fertilizer prepared by adopting the preparation method has a good application effect, and particularly has remarkable effect on fruits and vegetables.

Methods, systems, and apparatuses for anaerobic digestion of waste fibrous material and the recovery of nutrients are provided. Methods, systems, and apparatuses disclosed herein provide mechanisms to release dissolved gases from anaerobic digester effluent. Methods, systems and apparatuses disclosed herein can recover one or more nutrients from anaerobic digested effluent using a range of temperatures, aeration rates, aeration times, pH ranges, and settling times.

A method of producing an organic based fertilizer and usable water from animal waste includes the step of separating the animal waste into liquid waste and solid waste. The liquid waste is clarified to produce a supernatant and a sludge which is pressed into a filter cake. Ammonia is extracted from the supernatant to produce ammonium sulfate and an aqueous solution. The aqueous solution is filtered to produce a concentrate and water filtrate. The water filtrate may be used as drinking and washing water. The filter cake, ammonium sulfate, and concentrate may be used to supplement to the solid waste which is pelletized into the organic based fertilizer. In alternative embodiments a portion of the supernatant and aqueous solution may be used as a liquid fertilizer.

The present invention is directed to an organic substrate treatment system that converts organic substrate and other organic materials to nutrient rich effluent and biogas. Using sequential degradation of the organic materials, biogas and effluent is efficiently produced with relatively short digestion times. Additives are added to the organic materials prior to anaerobic digestion to enhance biogas production. A desulfurizer may be used to clean the raw biogas so that it is suitable for use with gas engines and boilers.

The present invention relates to methods and plants for the treatment of an organic waste material, wherein waste is subjected to anaerobic fermentation in a biogas digester; effluent is mechanically separated from the biogas digester into a concentrated fraction and a liquid fraction; the liquid fraction is heated to a high temperature below the boiling point of the liquid; the heated liquid is introduced to a flash column to partially remove volatile carbon dioxide, the pH of the liquid is elevated and ammonia is removed from the liquid.

The present invention relates to an anaerobic column reactor for biodegradation of wastes. Particularly the present invention relates to a process for conversion of biodegradable wastes to biogas and compost. More particularly, the present invention relates to an anaerobic reactor with unique arrangement of expanded and constricted portions alternatively placed vertically over each other which enhances the mixing pattern and thereby the mass transfer rates while controlling the biomass washout by regulating the upflow liquid velocity.

A filtration bed support for biolytic filtration wherein the filtration bed comprises a bed of solids in various stages of decomposition ranging from raw unprocessed organic material on the surface of the bed to fully decomposed humus which forms the bulk of the bed. The bed is kept from blocking by living organisms. The support comprises a three dimensional humus matrix lattice.

The invention provides a method for preparing an EM bio-organic fertilizer by use of biogass slurry. The method comprises the following steps: adding an EM stock solution and an EM nutrient fluid into biogass slurry, and cultivating the biogas slurry by EM to obtain a bio-organic fertilizer, wherein the mass ratio of biogas slurry, the EM stock solution and the EM nutrient fluid is (95-105): (2-6): (0.5-1.5). As the EM cultivation mode is adopted, the method for preparing the EM bio-organic fertilizer by use of biogass slurry has the advantages of being convenient, simple, easy to operate and the like. The bio-organic fertilizer contains rich organic matters and lots of beneficial bio-funguses, can play a soil improvement role, can accelerate decomposition of the organic matters, has the advantages of being rich in nutrition, being easy to be absorbed by plants, improving the yield and the quality of crops and the like, is a leaf fertilizer with comprehensive nutrients and can treat and control some plant diseases and insect pests of the crops.

The invention relates to a method for the treatment of waste with organic components, whereby in standardized method steps, various material solubilisers, for dissolving the organic material in a solvent and various reactors for carrying out a hydrolysis and/or a wet fermentation are used depending on the particle size and suitable solubilisers and reactors. A suitable waste treatment plant is also disclosed.

The invention relates to a system and method for controlling excrement and urine of poultries and placentae of disease-caused dead poultries in a large-scale farm. The system comprises a source separated poultry house, a solid-liquid separation system, a liquid high-temperature aerobic fermentation system, a solid fermentation system, a stink-flue gas treatment system, a circulating water system and a detection control system, wherein the source separated poultry house is a poultry house in which rainwater and sewage are separated, drinking water and sewage are separated, and fence flushing water and the excrement and urine of the poultries are separated; the solid-liquid separation system comprises a excrement collecting pool, a sludge pump and a solid-liquid separation device; the liquid high-temperature aerobic fermentation system comprises a liquid thermal-insulation fermentation reactor; the stink-flue gas treatment system comprises a stink heat exchange condenser, a flue gas heat exchange condenser, a biological deodorization filter tower, an aeration fan, an air blower and an induced draft fan; and the detection control system comprises a material temperature sensor, a material level sensor, a pressure sensor, a water temperature sensor and a controller. According to the system, the harmless treatment, the reduction and the recycling are realized, the environment is protected, and the energy is saved.