A kind of villages and towns in rural areas decentralized sewage treatment method
Technical field
The present invention relates to a kind of villages and towns in rural areas decentralized sewage treatment method, belong to the water treatment field in environment protection.
Background technology
Magnetic field itself is a kind of field with special energy, physical property through its chemical property of the aqueous solution, specific conductivity, dielectric constant, viscosity, chemical reaction and the aspect such as surface tension and absorption, cohesion and electrochemical reaction that magnetic field treatment is crossed all produces very large reaction, and there is memory effect, can a few hours be kept.Therefore sewage can be carried out magnetic field treatment, utilize magnetic kind inoculation technique, make non magnetic in water or sub magnetic debris all have magnetic, ferromagnetism macrobead, weak magnetic or non-magnetic impurity can be removed, reach the object of idetified separation.
Loading coagulation magnetic separation technique is utilize additional magnetic to add loading to carry out enhanced flocculation to reach high-efficiency sedimentation and filtration, namely in sewage, flocculation agent, magnetic kind etc. is added, add big flocculating body density, enhanced flocculation effect, again by High-rate sedimentation and Magnetic filter (externally-applied magnetic field, magnetic medium surface produces high-gradient magnetic field, and supplementary set is through its magnetic-particle) by the pollutant removal in water, magnetic kind is by the recycle and reuse of magnetic drum separator.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of villages and towns in rural areas decentralized sewage treatment method, the sanitary sewage of villages and small towns discharge enters wastewater collection pond by discharge channel, air stirrer and Pyatyi waste water collection tank are set in wastewater collection pond, waste water is formed turbulent flow also successively through Pyatyi waste water collection tank by air agitation wherein, then the water outlet of waste water through wastewater collection pond enters the water inlet of grid equipment, stepped grid selected by grid, grid grid gap 4mm, after particulate matter in waste water and bulky objects are tackled by grid, the water inlet of channeltype horizontal-flow grit chamber is entered from the water outlet of grid equipment, sand hopper is established bottom settling pit, after the precipitation of 2-4 hour, supernatant liquor enters the water inlet in turbine air flotation pond from the water outlet of settling pit, slag scraper is installed to remove the scum silica frost on air flotation pool liquid level in the rear end in turbine air flotation pond, clear liquid enters the water inlet of mixing pit by the water outlet in turbine air flotation pond, mixing pit arranges automatic drug feeding machine, Xiang Shuizhong adds the magnetic powder Fe of surface parcel one deck ironic hydroxide glue-line
3o
4particle, dosage is 1g-4g/L, through mixing agitator stir about after 0.5-4 hour, water enters the water inlet of settling pond from the water outlet of mixing pit, automatic drug feeding machine is provided with in settling pond, add flocculation agent and magnetic, flocculation agent aluminium alloy and slag powder, mass ratio is 1:1, after the clarification of about 4-8 hour, clear liquor enters the water inlet of adsorption tank from the water outlet of settling pond, magnet coil group 20 groups is set in adsorption tank, often group height 1m, the number of turn 4000, fill 50 μm of stainless steel wools, filling ratio is 30%, magneticstrength is set to 80mT, in adsorption tank, add catalyzer and sterilizing agent simultaneously, after the absorption of 2-5 hour, water enters the water inlet of recoil wash pool from the water outlet of adsorption tank, the back flushing water port of recoil wash pool connects the back flushing water inlet of adsorption tank by pipeline, 4 pieces, magnet is established in recoil wash pool, two, water pump, a back flushing was carried out to adsorption tank in every 12 hours, after the process of recoil wash pool, water outlet enters the water inlet of Buffer Pool by pipeline, the accident water port of Buffer Pool connects the accident water inlet in wastewater collection pond by pipeline, after the process of Buffer Pool, water outlet enters the water inlet observing well by pipeline, water quality online analyzer device is provided with a set of in observation well, the water outlet observing well connects discharge channel by pipeline, water after process enters surface water body by discharge channel.
The catalyzer that adsorption tank is selected and sterilizing agent are clorox.
The magnetic powder Fe of surface parcel one deck ironic hydroxide glue-line
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4the dosage of particle is 2g-3g/L.
The invention has the advantages that:
(1) processing efficiency is high, and processing speed is fast, and processing power is large, and the residence time is short, and effluent quality is good, and sludge concentration is high.Whole system adopts programmable logic controller to operate, and realizes the automatic control of pump switch.
(2) sanitary sewage nitrogenous and phosphorous in a large number can be processed.In sanitary wastewater by present method process, the clearance of chemical oxygen demand (COD) reaches 98.0%, the clearance of ammonia nitrogen reaches 97.7%, the clearance of petroleum class and zoology and botany oil reaches 99.3%, the clearance of five-day BOD reaches 96.9%, and the clearance of suspended substance reaches 97.1%, and the clearance of total phosphorus reaches 99.0%, the clearance of anionic detergent reaches 96.2%, delivery turbidity <10NTU.
(3) running cost is low, and the iron powder rate of recovery of input can reach 85%, resource reclaim, safe and reliable.
(4) anti impulsion load ability is strong, and when the high water yield or high-pollution load, still Absorbable organic halogens runs.
Accompanying drawing explanation
Fig. 1 is the equipment schematic diagram of villages and towns in rural areas decentralized type sewage treatment system.
1-grid, 2-channeltype horizontal-flow grit chamber, 3-turbine air flotation pond, 4-mixing pit, 5-settling pond, 6-adsorption tank, 7-recoil wash pool, 8-Buffer Pool, 9-observe well, 10-wastewater collection pond, 21-air stirrer, 22-sand hopper, 23-slag scraper.
Embodiment
Embodiment 1
The sanitary sewage of villages and small towns discharge enters wastewater collection pond by discharge channel, air stirrer and Pyatyi waste water collection tank are set in wastewater collection pond, waste water is formed turbulent flow also successively through Pyatyi waste water collection tank by air agitation wherein, then the water outlet of waste water through wastewater collection pond enters the water inlet of grid equipment, stepped grid selected by grid, grid grid gap 4mm, after particulate matter in waste water and bulky objects are tackled by grid, the water inlet of channeltype horizontal-flow grit chamber is entered from the water outlet of grid equipment, sand hopper is established bottom settling pit, after the precipitation of 2-4 hour, supernatant liquor enters the water inlet in turbine air flotation pond from the water outlet of settling pit, slag scraper is installed to remove the scum silica frost on air flotation pool liquid level in the rear end in turbine air flotation pond, clear liquid enters the water inlet of mixing pit by the water outlet in turbine air flotation pond, mixing pit arranges automatic drug feeding machine, Xiang Shuizhong adds the magnetic powder Fe of surface parcel one deck ironic hydroxide glue-line
3o
4particle, dosage is 1gL, through mixing agitator stir about after 0.5 hour, water enters the water inlet of settling pond from the water outlet of mixing pit, automatic drug feeding machine is provided with in settling pond, add flocculation agent and magnetic, flocculation agent aluminium alloy and slag powder, mass ratio is 1:1, after the clarification of about 4-8 hour, clear liquor enters the water inlet of adsorption tank from the water outlet of settling pond, magnet coil group 20 groups is set in adsorption tank, often group height 1m, the number of turn 4000, fill 50 μm of stainless steel wools, filling ratio is 30%, magneticstrength is set to 80mT, in adsorption tank, add clorox simultaneously, after the absorption of 2-5 hour, water enters the water inlet of recoil wash pool from the water outlet of adsorption tank, the back flushing water port of recoil wash pool connects the back flushing water inlet of adsorption tank by pipeline, 4 pieces, magnet is established in recoil wash pool, two, water pump, a back flushing was carried out to adsorption tank in every 12 hours, after the process of recoil wash pool, water outlet enters the water inlet of Buffer Pool by pipeline, the accident water port of Buffer Pool connects the accident water inlet in wastewater collection pond by pipeline, after the process of Buffer Pool, water outlet enters the water inlet observing well by pipeline, water quality online analyzer device is provided with a set of in observation well, the water outlet observing well connects discharge channel by pipeline, water after process enters surface water body by discharge channel.
After process, discharge water is through water quality monitoring (WQM), the clearance of chemical oxygen demand (COD) reaches 97.0%, the clearance of ammonia nitrogen reaches 97.2%, the clearance of petroleum class and zoology and botany oil reaches 99.0%, the clearance of five-day BOD reaches 96.3%, and the clearance of suspended substance reaches 97.0%, and the clearance of total phosphorus reaches 99.0%, the clearance of anionic detergent reaches 96.0%, delivery turbidity <10NTU.
Embodiment 2
The sanitary sewage of villages and small towns discharge enters wastewater collection pond by discharge channel, air stirrer and Pyatyi waste water collection tank are set in wastewater collection pond, waste water is formed turbulent flow also successively through Pyatyi waste water collection tank by air agitation wherein, then the water outlet of waste water through wastewater collection pond enters the water inlet of grid equipment, stepped grid selected by grid, grid grid gap 4mm, after particulate matter in waste water and bulky objects are tackled by grid, the water inlet of channeltype horizontal-flow grit chamber is entered from the water outlet of grid equipment, sand hopper is established bottom settling pit, after the precipitation of 2-4 hour, supernatant liquor enters the water inlet in turbine air flotation pond from the water outlet of settling pit, slag scraper is installed to remove the scum silica frost on air flotation pool liquid level in the rear end in turbine air flotation pond, clear liquid enters the water inlet of mixing pit by the water outlet in turbine air flotation pond, mixing pit arranges automatic drug feeding machine, Xiang Shuizhong adds the magnetic powder Fe of surface parcel one deck ironic hydroxide glue-line
3o
4particle, dosage is 4gL, through mixing agitator stir about after 4 hours, water enters the water inlet of settling pond from the water outlet of mixing pit, automatic drug feeding machine is provided with in settling pond, add flocculation agent and magnetic, flocculation agent aluminium alloy and slag powder, mass ratio is 1:1, after the clarification of about 4-8 hour, clear liquor enters the water inlet of adsorption tank from the water outlet of settling pond, magnet coil group 20 groups is set in adsorption tank, often group height 1m, the number of turn 4000, fill 50 μm of stainless steel wools, filling ratio is 30%, magneticstrength is set to 80mT, in adsorption tank, add clorox simultaneously, after the absorption of 2-5 hour, water enters the water inlet of recoil wash pool from the water outlet of adsorption tank, the back flushing water port of recoil wash pool connects the back flushing water inlet of adsorption tank by pipeline, 4 pieces, magnet is established in recoil wash pool, two, water pump, a back flushing was carried out to adsorption tank in every 12 hours, after the process of recoil wash pool, water outlet enters the water inlet of Buffer Pool by pipeline, the accident water port of Buffer Pool connects the accident water inlet in wastewater collection pond by pipeline, after the process of Buffer Pool, water outlet enters the water inlet observing well by pipeline, water quality online analyzer device is provided with a set of in observation well, the water outlet observing well connects discharge channel by pipeline, water after process enters surface water body by discharge channel.
After process, discharge water is through water quality monitoring (WQM), the clearance of chemical oxygen demand (COD) reaches 98.0%, the clearance of ammonia nitrogen reaches 97.7%, the clearance of petroleum class and zoology and botany oil reaches 99.3%, the clearance of five-day BOD reaches 96.9%, and the clearance of suspended substance reaches 97.1%, and the clearance of total phosphorus reaches 99.0%, the clearance of anionic detergent reaches 96.2%, delivery turbidity <10NTU.