EURO-ECO 2010 Hanover 2 - 3 Dezember 2010	Environmental, Engineering - Economic and Legal Aspects for Sustainable Living
	European Academy of Natural Sciences, Hanover European Scientific Society, Hanover University of Bremen, Bremen

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Nowadays the issue of improvement of flow processes and systems for conditioning of not provided with a system of sewers industrial enterprises and public utilities liquid effluent with the purpose of these facilities technotronic security upgrade is getting more and more urgent all over the world.

This problem appears to be a real challenge in the process of stockbreeding complexes, dealing with hog battening, industrial sewage purification, treatment and conditioning.

Privately owned enterprise POTENTIAL-4 worked out the technology of conditioning of liquid manure which is generated if pigs are bred on the slatted floor without bedding and battened with the help of mixed fodder.

Sewage drainage and purification process scheme involves three systems of sewers on the territory of the complex: K1 – for drainage of industrial and domestic effluents (shower, washstands, tidying up) to the local purification installations like sewerage pumping unit with built-in full-scale biological treatment and disinfection block; K2 – for drainage of the polluted aerial water to the sediment ponds; K3 – for the drainage of liquid manure (industrial sewage) – through the grating to the inleak chamber of the sewerage pumping unit. According to the Ukrainian regulations sanitary-hygienic zone (SHZ) length of the local purification installations (LPI) of the industrial sewage and polluted aerial water purification shall comprise 60 m to the industrial facilities of the stockbreeding complex, settlement zone of the residential areas shall be determined by the SHZ of the stockbreeding complex if they are situated on the territory of the complex. Provided the complex and residential areas are situated separately, SHZ shall be determined according to the Ukrainian Settlement Housing System Sanitary Rules and comprise 150-300 m depending on the power and structure of the local purification installations.

For biological treatment of industrial and domestic effluents local purification installations of the ASTRA unit (model line UNILOS), which are installed below ground level, and bioplat for purified return water drainage to the topsoil for the all-year-round soil irrigation of the decorative landscaping perennial plantings are used; SHZ – 8m.

Aerial water LPI involve construction of the grit removal dome with biosorption slick bar for floating oil-product biodeterioration, sediment pond and purified aerial water inleak chamber fitted with drowned pump for purified water supply for landscaping plantings wetting; SHZ – 20m.

Industrial sewage LPI involve construction of the inleak chamber fitted with the grating, electric mixer and drowned pump for supply of liquid manure to the engine house of the sewerage pumping unit with the built-in treatment block (SPU with BTB), where reagent preparation and dosage unit and spiral separator for physicochemical sewage treatment and phase distribution are installed.

To provide the disinfection of industrial sewage which contains phenols, hydrogen sulphide, urea, ammonium salts, ammonia, phosphates etc. it should be conditioned by the coagulant with pH guidance.

Coagulant is treated while the electric mixer is switched on, mixing lasts until hydroxide of the coagulated metal ion and sorption of phenols on its surface, insoluble residue of phosphates and ammonium salts from ammonia after the fall of pH to 6.5-7.0 units are formed.

After the coagulation process is over, sewage is supplied to spiral separator for phase distribution. Precipitation of 80 % of dampness is inladed to the motor transport and is removed to composting ground, turbidity-free sewage reaches fermenting box, fitted with mechanical aerator by gravity, fermenting box capacity provides for 7 days of turbidity-free sewage holding.

For cultivation in fermenting box of microorganisms biomass – nitrifiers and denitrifiers, which are treated to sewage in the period of commissioning to provide the biological treatment process of return water biological treatment, biological product BIOMIX can be used.

Termination process of stockbreeding complex industrial sewage conditioning takes place in bioponds.

Bioponds are usually 3 m deep and consist of 4 sections where biological advanced treatment – return water conditioning for its use for fertilizing wetting of grain and fodder crops during non-vegetative spring-autumn period in the agricultural fields - takes place.

Biologically purified industrial sewage of the hog enterprise is aged in bioponds 6 months, after this it can be used for wetting. Return water which reaches bioponds in the period from June,1 till November, 30 is used in spring of the next year, return water which reaches bioponds in the period from December,1 till May,30 is used in autumn.

Mechanically dehydrated sediments are brought by the motor transport to composting ground in storage pits, each of the pits is 2 meter high, width on the mark of the hard ground surface is 3 m, width on the top of the pit is 1 m, length of the storage pit is determined by calculation.

While aging in storage pit under the soil layer of 20cm with biological product BIOMIX for the period of 6 months, dehelminthization of sediments and biodeterioration of sediments into biohumus is taking place. In six month foliar feed is ready to be added to soil with the aim of improvement of its fertilizing and structural-mechanical properties, storage pit is opened and removed soil is used to form a new storage pit. So, one storage pit is formed from the soil which covers foliar feed. Storage pits filled with sediments, refined into foliar feed, in summer, are carried to the fields in spring, those filled in winter and spring – are carried to the fields in autumn. Polluted aerial water from the composting ground is drained to the nearly located bioponds.

Technology suggested by the privately owned enterprise POTENTIAL-4 allows over the longer term to complement it with the blocks for biomethanation before the use of water for fertilizing wetting and production of sediments for soil fertilization after sewage gas utilization. The worked-out technology is implemented in the hog stockbreeding complexes with capacity from 5 till 100 thousand head per year in Kiev, Cherkassy and Donets’k regions of Ukraine. Decisions taken ensure ecological security of facilities which are in operation from year 2008.

 

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