49 results about "Swine wastewater" patented technology

The present invention provides an integrated system for treatment of biodegradable waste, including sewage sludge, forestry waste, food waste, agricultural waste, municipal waste, and the like. The integrated system comprises an anaerobic reactor, at least one aerobic reactor, a filtration device, and a desalinization device.

The invention discloses a method for treating swine wastewater. The method includes the steps that the swine wastewater is injected into an electrolytic phosphorus recycling pond; when the pH is increased to 9 to 9.5, the electrolytic reaction is stopped; after standing is carried out, supernatant liquid enters an ammonia settling pond; recycled magnesium ammonium phosphate solid is added into a magnesium ammonium phosphate electrochemical decomposing pond with the proportion of the mole number of phosphorus in the magnesium ammonium phosphate solid to the mole number of ammonia nitrogen in the wastewater in the ammonia settling pond of 1:1, a magnesium ammonium phosphate electrochemical reaction is carried out, and all generated decomposition products are transferred to the ammonia settling pond; then reacting is carried out for 20 min to 30 min at the pH of 9 to 9.5, magnesium ammonium phosphate generated after solid-liquid separation returns to the magnesium ammonium phosphate electrochemical decomposing pond to be repeatedly used, and after repeated using is carried out 6 to 8 times in this way, fresh recycled magnesium ammonium phosphate is used for replacement. According to the method, operation is easy, the project investment cost is low, the treating cost is low, and the ammonia nitrogen in the wastewater can be efficiently removed under the condition that phosphate and magnesium salt do not need to be added; meanwhile, the magnesium ammonium phosphate solid can be recycled, and the high economic benefits and the high environment benefits are achieved.

The invention relates to a fast, efficient and sanitary method and equipment for treating swine wastewater. The method comprises the following steps: filtering solid particles out of stoste; feeding filtrate into a Fenton oxidation tank, adjusting the pH value to 2-6 and adding 5-50 mmol / L of Fe<2+> and H2O2 with the mass concentration of 30% (the volume ratio of the H2O2 and the wastewater is 1 / 20-1 / 3.) for a Fenton reaction for 10-24 h; feeding supernate into a deferrization treatment tank, adding an alkalinous metal compound, stirring the mixture for 1-10 min and performing a Fe ion sedimentation reaction for 1-5 h; and feeding supernate into a denitrification treatment tank, adding a medicament containing phosphate radicals and Mg<2+> after dissolution at a molar ratio (being 1:1:(1-1.3) of N to P to Mg, stirring the mixture for 1-10 min and performing a reaction on magnesium ammonium phosphate for 1-5 h. The waste water treated by the method meets the national grade-1 standard of wastewater discharge. Additionally, after filter pressing is carried out on solid precipitates generated in all the steps, the solid precipitates are treated safely as solid wastes, and liquid formed by filter pressing flows back to the stoste. The method and the equipment are suitable for treating urine and wastewater of a pig farm and have the advantages of being short in cycle, high in efficiency, good in effect, sanitary in implementation environment and the like.

The invention relates to a microbiological fuel cell-based pig farm wastewater treatment method. The method comprises the following steps: large-granule pollution substances and floaters in sewage are removed by using a mechanical grid; an equalizing tank adjusts the water volume and the water quality uniformization; a hydrolysis-acidification tank hydrolyzes organic matters; an anaerobic tank hydrolyzes the organic matters to improve the biodegradability of wastewater and maintain the anaerobic state of the wastewater; wastewater treatment and electric energy generation are carried out in a microbiological fuel cell; and an electric energy collecting system collects electric energy, and provides the electric energy for a water quality detection system for monitoring the treatment condition of wastewater in the microbiological fuel cell. The method combines the microbiological fuel cell with a traditional wastewater treatment technology, so the method can be applied in treatment of pig farm wastewater to recover the electric energy and realize wastewater treatment.

The invention relates to a composite microbial viable bacteria preparation and an application thereof in high-concentration pig-raising wastewater. The composite microbial viable bacteria preparationis a bacterial suspension which comprises Bacillus cereus 2-2, Pseudomonas sp. C2-1, Pichia pastoris 2-6 and Lactobacillus zeae 2-20, wherein the viable count of Bacillus cereus 2-2 is greater than orequal to 1.48*1010 CFU / mL, the viable count of Pseudomonas sp. C2-1 is greater than or equal to 2.04*1010 CFU / mL, the viable count of Pichia pastoris 2-6 is greater than or equal to 0.98*1010 CFU / mL,and the viable count of Lactobacillus zeae 2-20 is greater than or equal to 1.78*1010 CFU / mL. The composite microbial viable bacteria preparation is used for treating wastewater containing high-concentration COD and NH3-N, thereby achieving high-efficiency removal of COD and nitrogen.