SU874665A1 - Method of waste water purification in cattle breeding complexes - Google Patents

Description

With the preliminary separation of coarse mechanical impurities.

However, the method has a complex technical and ecological scheme of wastewater treatment plants, including a three-stage purification in aeration tanks, settling tanks, sealers, wastewater accumulators and a filtration floor. The presence of three septic tanks resulting in the contamination of a significant area of the surrounding space with an infectious microflora and the formation of hydrogen sulfide as a result of the rotting process. Half of the volume of all wastewater treatment, sent after cleaning to the floor of the filter contains a significant amount of organic (cleaning compared to the original COD by 60%) and suspended solids (cleaning by 50%). Such a high amount of pollution affects the ecology of the environment, especially in humid climates where evaporation is difficult.

The purpose of the invention is to increase the degree of purification of waste from livestock farms.

The aim is to achieve that after the separation of coarse mechanical impurities, the wastewater of livestock complexes is subjected to electroprocessing in a uniform electric field, followed by purification in biological ponds, into which Bacillus micilaginosus bacteria are first introduced in a volume ratio to cold water 5: 100-10: 100, and then the Black Sea microalga Platimonus V i g idi S in the same volumetric ratio of wastewater.

At the same time, wastewater is subjected to electrotreatment with a floor strength of 70-30 V / cm.

As a result of treatment with an electric field, detoxification of wastewaters occurs, due to the occurrence of a series of chemical reactions, electromechanical oxidation, amination of organic compounds, the complex formation of ammonia proteins, which are ether soluble with metal hydroxide ions. The selected material of the electrode pair and the electrotreatment mode allows the process to be carried out without precipitation of a solid phase. Treated effluent is a sub & waste for the symbiosis of Platimonus vtr.idis microalgae with Bacillus micilaqinosus microalgae we offer. At the same time, the electric treatment of wastewaters allows to achieve a reduction in the terms of their processing by microorganisms and to increase the degree of purification in terms of: transparency, suspended substances, COD.

The choice of ratios 5: 100-10: 100 was made according to the technical and economic efficiency indicator, determined by the ratio of the cost of growing the crop to the operating costs of the sewage treatment plant. The microalga Platimonus V I g I d i S is isolated from the Black Sea water and cultured on Goldberg medium in the Kabanova modification. The microalgae concentration is 2.685 3.35-10 cells per ml. Bacillus micilaginosus strain E19 is cultured on solid nutrient media. The bacterial washes with saline were adjusted to a concentration of 10 units. turbidity, which corresponds to 2.6-3.5-10® cells to 1 ml.

The Black Sea Algae Platimonus V i g i d i S has the ability to multiply in wastes containing significant amounts of hydrogen sulfide and adapt to low salinity. When using algae bacillus with soil bacterium Bacil-. lus micilaginosus increases the hydrolyzing effect on waste of the powerful enzymatic system of bacteria. The biocenosis of marine microalgae and soil bacteria is formed in biological ponds, in which waste and wastewater that has undergone preliminary electrochemical purification is concentrated. Wastewaters treated in this way enter the freshwater reservoir. At the same time, the temporary biocenosis of algae and bacteria disintegrates. Algae in fresh water, upon dying off, form detritus, which is naturally mineralized by biosystems that purify this body of water. 1 Soil bacteria Ba5 oil lus micilaginosus form spores in fresh water under adverse conditions that germinate only when they enter the soil.

The use of other algae and bacteria for the treatment of wastewater that has undergone electrotreatment does not lead to a positive effect, since the hydrogen sulfide contained in the effluent is an inhibitor of the cell division of most microorganisms. Testing microalgae and bacteria for their ability

multiplication was carried out in tanks in the light at t. The growth of bacteria is judged by the formation of a film and the turbidity of the liquid, and the cleaning by clarification of the liquid and the formation of a precipitate at the bottom of the tank. Algae growth is judged by increasing the intensity of green color. Effect

cleaning is determined by the transparency of the water column above the precipitate and the formation of a clear interface. The content of suspended substances of oxygen, transparency, COD is determined in the supernatant.

Example. Wastewater of livestock complexes in a volume of 1 l, which have passed the separation of coarse mechanical impurities, containing, mg / l: organic matter on COD 16540, weighing

Claims (2)

Claim 1. A method of treating wastewater of livestock complexes, including the separation of coarse mechanical impurities and biological treatment, characterized in that, in order to increase the degree of purification, the wastewater is electrically treated in a uniform electric field, followed by treatment in biological ponds, which are first introduced by Bacillus bacteria miсi1aginosus in a volume ratio of 5: 100-10: 100 to waste iodine, and then the Black Sea microalga Platimonus viridis in the same volume ratio to waste water. 2. The method of pop. 1, characterized in that the wastewater is subjected to electrical treatment at a field strength of 7-30 V / cm.