CN101538108B - Microbial purifying ecological treatment system of landscape water body - Google Patents

Abstract

The invention discloses a microbial purifying ecological treatment system of a landscape water body, which comprises a first-stage filter tank (1), a second-stage biochemical pool (2), a third-stage biochemical pool (3), a fourth-stage reduction pool (4), a fifth-stage clean water pool (5), and a pollution discharge pool (6). The invention adopts micro-power circulation, filtration and sedimentation, utilizes a microbial contact oxidation method, via a multi-stage artificial beneficial microbial culture bed, by a technical proposal that an aerobic beneficial microorganism takes in and degrades the organic pollutant, nitrogen and phosphorus plant nutrient, and then a ultraviolet ray implements sterilization and disinfection for purifying and restoring the clear water, and thus solving the problems and shortcomings of high cost, water source restriction, drug contamination, and lower removal rate which exist in the prior art. The microbial purifying ecological treatment system of the landscape water body can lead the purifying treatment of the landscape water body to achieve the purposes of easy control, high removal, low cost, non-needing water change, and non-drug pollution by the way of artificially cultivating aerobic beneficial microbial ecological circular automatic purification.

Description

The microbial purifying ecological treatment system of landscape water body

Technical field

The present invention relates to the water body purification treatment technology, specifically be meant at relative closure in gardens, residential quarters, the urban look or semiclosed property water system water body, by the microkinetic auxiliary circulation, adopt the useful pollutent of having a liking in the oxygen animalcule degraded water body, strengthen the microbial purifying ecological treatment system of a kind of landscape water body of water body self-purification ability.

Background technology

The organic pollutant of landscape water body comes from the sanitary sewage in the district, and rain drop erosion is pooled to rubbish, fallen leaves, the dust in the water body, the movement of water fish class and the soil ulmin of waterplant etc.Contain a large amount of organism in the sanitary sewage, after organism enters the water scenery water body,, transfer the eutrophication of nitrogen, phosphorus plant nutrient acceleration water body to, make algal bloom in the water, cause the muddy blackening of water body to worsen and produce mould stench flavor through bacterial degradation.

The landscape water body purifying method of prior art has, and diversion is changed water, the husky filter of circulation, medicine algae removal, thrown in the beneficial microorganism purification, and wherein: water is changed in diversion, is subjected to cost, water source to limit 300m ³Above water body, cost is too high, 5000m ³Above water body, the feasibility at several no water sources; The husky filter method that circulates, can only elimination water in solids, nitrogen soluble in water, phosphorus plant nutrient and mould stench flavor are not had the filtering effect; The medicine algae removal, effect is of short duration, and nitrogen soluble in water, phosphorus plant nutrient and mould stench flavor are not had the effect of dispeling, and also water body is caused the medicine secondary pollution, and algae still can overgrow once more afterwards; The input beneficial microorganism purifies, and quickens organic decomposition in the water, can play the effect of purification of water quality, and prior art is taked to add a large amount of mud at the bottom, throws in mud then and cultivates beneficial microorganism; The cleaning action that this extensive style is thrown in cultural method is difficult to control, to nitrogen phosphorus plant nutrient to dispel rate lower.Therefore, prior art have the restriction of cost height, water source, can't dispel nitrogen, phosphorus plant nutrient, drug contamination, problems and shortcomings that the rate of dispeling is lower.

Summary of the invention

Problems and shortcomings at above-mentioned prior art existence, the present invention takes the microkinetic circulation, filter, precipitation, adopt the microorganism contact oxidation method, manually have a liking for the oxygen beneficial microorganism and cultivate bed through multistage, by having a liking for the oxygen beneficial microorganism with the organic pollutant in the water, nitrogen phosphorus plant nutrient picked-up degraded, again by ultraviolet radiation for sterilizing and disinfecting, purify the technical scheme of reduction clear water, a kind of microbial purifying ecological treatment system of landscape water body is provided, be intended to have a liking for the self-clearing mode of oxygen beneficial microorganism ecological circulation, the purifying treatment of water scenery water body reached be easy to control by artificial culture, dispel the rate height, cost is low, need not to change water, the purpose of medicine-less pollution.

The object of the present invention is achieved like this: the ecological microbially decontaminate treatment system of water scenery water body, comprise the one-level filtering basin, the secondary biochemical pond, three grades of biochemistry pools, level Four reduction pond, the Pyatyi clean water basin, pollution discharge pond, wherein: described one-level filtering basin are pressed current forward approach for adjacent with the view streams, Chi Kou and upper strata, view streams are contour, be deeper than the underground Reinforced Concrete Structure pond of view streams bottom at the bottom of the pond, be equipped with the desirable pocketed filter screen that goes out to put in the pond, on the pool wall adjacent, be respectively equipped with upper strata with the view streams with the view streams, the middle level, the flowing water passage that lower floor's water body communicates, in the pool wall adjacent, be provided with " ∫ " shape and be embedded into pipeline with secondary biochemical pond, downstream, the end mouth that is embedded into pipeline is positioned at the bottom in pond, the top pool wall that passes suitable for reading communicates with the topmost surface in adjacent secondary biochemical pond, and the bottom in pond is provided with blow-off line; Described secondary biochemical pond, press current forward approach for adjacent with the one-level filtering basin, dark at the bottom of the contour pond of pond mouth etc., underground Reinforced Concrete Structure pond, dark at the bottom of the contour pond of pond mouth etc., be provided with in the pond and constitute by the Stainless Steel Wire that twines the polymer fiber corrugation, the microorganism of paliform cage is cultivated bed, go deep into being inserted with in the pond some gas rods in the cage vertically downward, plug into by interface and external air source in gas rod upper end, microorganism is cultivated to inoculate on the bed corrugation the oxygen of having a liking for probiotics, in the pool wall adjacent, be provided with " ∫ " shape and be embedded into pipeline with the three grades of biochemistry pools in downstream, the end mouth that is embedded into pipeline is positioned at the bottom in pond, and the top pool wall that passes suitable for reading communicates with the topmost surface of three grades of biochemistry pools in downstream, and the bottom in pond is provided with blow-off line; Described three grades of biochemistry pools are pressed current forward approach for adjacent with the secondary biochemical pond, and its structure, configuration are identical with the secondary biochemical pond, but do not establish the gas rod; Described level Four reduction pond, press current forward approach for adjacent with three grades of biochemistry pools, dark at the bottom of the contour pond of pond mouth etc., underground Reinforced Concrete Structure pond, the center in pond is provided with the diving ultraviolet sterilizing lamp, is provided with " ∫ " shape and is embedded into pipeline in the pool wall adjacent with downstream Pyatyi clean water basin, and the end mouth that is embedded into pipeline is positioned at the bottom in pond, the top pool wall that passes suitable for reading communicates with the topmost surface of the Pyatyi clean water basin in downstream, and the bottom in pond is provided with blow-off line; Described Pyatyi clean water basin are pressed current forward approach for adjacent with level Four reduction pond, and dark at the bottom of the contour pond of pond mouth etc., underground Reinforced Concrete Structure pond is provided with submersible pump in the pond, and the bottom in pond is provided with blow-off line; Described pollution discharge pond is underground Reinforced Concrete Structure open caisson, the shaft bottom face is lower than each Chi Chi bottom surface, and the borehole wall is provided with the blow-off line of the main blow-off pipe that is lower than each Chi Chi bottom surface and bottom, each pond and plugs into, and well head is provided with residual sea water pump, the suction nozzle of residual sea water pump places the shaft bottom, and pumping hole and municipal drainage are plugged into.

Each facility interconnected relationship of system

The one-level filtering basin link to each other with the view streams by upper strata, middle level, the underflow aquaporin on the adjacent pool wall; One-level filtering basin, secondary biochemical pond, three grades of biochemistry pools, level Four reduction pond, Pyatyi clean water basin are contacted by the pipeline that is embedded in the adjacent pool wall; The Pyatyi clean water basin link to each other with the view streams by submersible pump and water pipe thereof; The blow-off line parallel connection of each bottom, pond links to each other with pollution discharge pond through main blow-off pipe; Pollution discharge pond links to each other with municipal drainage by residual sea water pump.

Principle of work

The dirt water in view streams enters in the one-level filtering basin by the flowing water passage that is located at upper strata on the one-level filtering basin pool wall, middle level, lower floor, filter screen in being located at the pond, foreign material that will be bigger such as floating matter eliminations such as branches and leaves, rubbish, the small particle that proportion is bigger then is deposited at the bottom of the pond;

Filter back water is by being located at the pipeline that is embedded in the pool wall adjacent with the secondary biochemical pond, flow into the topmost surface in secondary biochemical pond by the bottom in the pond, in the water in the one-level filtering basin still unprecipitated small-particle silt, make to have a liking for the cultivation base of oxygen probiotics on the corrugation of a part attached to microorganism cultivation bed, a part then is deposited at the bottom of the pond, the gas rod injects water with air, increase the dissolved oxygen amount in the water, cultivate and promote to cultivate and have a liking for the oxygen probiotics on the bed and quicken organic pollutant and nitrogen phosphorus plant nutrient in the picked-up degradation of sewage, become primary purification water;

Primary purification water is by being located at the pipeline that is embedded in the pool wall adjacent with three grades of biochemistry pools, flow into the topmost surface of three grades of biochemistry pools by the bottom in the secondary biochemical pond, still unprecipitated suspension small-particle silt in the secondary biochemical pond on a small quantity in the water, make to have a liking for the cultivation base of oxygen probiotics on the corrugation of a part attached to microorganism cultivation bed, a part then is deposited at the bottom of the pond, primary purification water slowly flows through microorganism cultivates bed, residual organic pollutant and nitrogen phosphorus plant nutrient are had a liking for the oxygen beneficial microorganism and are absorbed degraded once more in the water, become secondary-cleaned water;

Secondary-cleaned water is by being located at the pipeline that is embedded in the pool wall adjacent with level Four reduction pond, flow into the topmost surface in level Four reduction pond by the bottom in three grades of biochemistry pools, in the water on a small quantity in three grades of biochemistry pools still unprecipitated suspension small-particle silt continue precipitation at the bottom of the pond, by being located at the diving ultraviolet sterilizing lamp sterilization and disinfection in the pond, become reductive water;

Reductive water is by being located at the pipeline that is embedded in the pool wall adjacent with the Pyatyi clean water basin, flow into the topmost surface of Pyatyi clean water basin by the bottom in the level Four reduction pond, regularly adjust the pH value of Chi Shui, Xiang Shuizhong throws in flocculation agent and promotes outstanding absurd creature to precipitate at the bottom of the pond, obtain the reduction clear water, will reduce the upstream recycle in clear water blowback view streams by submersible pump in the pond;

Each pond bottom settlings can't decompose mud impurity, by separately the bottom blow-off line compile in the pollution discharge pond through main blow-off pipe, through harmless treatment, pump into municipal drainage by residual sea water pump.

So-called microkinetic circulation is meant the power wheel drive by submersible pump, current are trickled to the Pyatyi clean water basin by view streams, upstream, return the ecological microbially decontaminate processing closed circulation system that view streams, upstream is constituted, since consume power than other prior art systems to lack many, so difference.

The mechanism of biological contact oxidation process

The microfauna of the microorganism of bacterium class and Mycophyta and protozoon, metazoan one class forms biological bag attached to growth reproduction on filler or some carrier, when sewage contacts with biological bag, organic pollutant in the sewage, plant nutrient nitrogen, phosphorus etc., as nutritive substance, by biological Institute of Micro-biology's picked-up of wrapping, micro-polluted water is purified, and microorganism self also obtains breeding.Bio-contact oxidation can reach 20-30% and 80-90% respectively to the clearance of COD, the NH3-N of micropollutant water.Benefit that native system adopted biology slightly is a composite flora from the seed selection of ecological boundary, in " clear water " after purification for want of " nutrition " and wither away the anxiety of non-secondary pollution automatically.

In sum, the present invention takes the microkinetic circulation, filter, precipitation, adopt the microorganism contact oxidation method, through the multistage artificial useful oxygen animalcule cultivation bed of having a liking for, by having a liking for the oxygen beneficial microorganism with the organic pollutant in the water, nitrogen, phosphorus plant nutrient picked-up degraded, again by ultraviolet radiation for sterilizing and disinfecting, purify the technical scheme of reduction clear water, overcome prior art and had the cost height, the water source restriction, drug contamination, the problems and shortcomings that the rate of dispeling is lower, the microbial purifying ecological treatment system of a kind of landscape water body that is provided, have a liking for the self-clearing mode of oxygen beneficial microorganism ecological circulation by artificial culture, the purifying treatment of water scenery water body is reached be easy to control, dispel the rate height, cost is low, need not to change water, the purpose of medicine-less pollution.

Description of drawings

Fig. 1 is the synoptic diagram of the ecological microbially decontaminate treatment system of water scenery water body of the present invention;

Fig. 2 is that enlarged view is drawn in the part of the A portion among Fig. 1.

Below in conjunction with the embodiment in the accompanying drawing the present invention is described in further detail, but should not be construed as any limitation of the invention.

Among the figure: one-level filtering basin 1, filter screen 11, flowing water passage 12, secondary biochemical pond 2, microorganism are cultivated bed 21, gas rod 22, corrugation 23, three grades of biochemistry pools 3, level Four reduction pond 4, diving ultraviolet sterilizing lamp 41, Pyatyi clean water basin 5, submersible pump 51, pollution discharge pond 6, residual sea water pump 61, blow-off line 62, main blow-off pipe 63, higher level's view streams 01, subordinate view streams 02, throw out 03, small particle 04 that proportion is bigger, are embedded into pipeline 05; A-draws amplifier section in the part.

Embodiment

Consult Fig. 1, Fig. 2, the ecological microbially decontaminate treatment system of a kind of water scenery water body of the present invention, comprise one-level filtering basin 1, secondary biochemical pond 2, three grades of biochemistry pools 3, level Four reduction pond 4, Pyatyi clean water basin 5, pollution discharge pond 6, wherein: described one-level filtering basin 1 are pressed current forward approach for adjacent with the view streams, Chi Kou and upper strata, view streams are contour, be deeper than the underground Reinforced Concrete Structure pond of view streams bottom at the bottom of the pond, be equipped with the desirable pocketed filter screen 11 that goes out to put in the pond, on the pool wall adjacent, be respectively equipped with upper strata with the view streams with the view streams, the middle level, the flowing water passage 12 that lower floor's water body communicates, in the pool wall adjacent, be provided with " ∫ " shape and be embedded into pipeline 05 with secondary biochemical pond, downstream 2, the end mouth that is embedded into pipeline 05 is positioned at the bottom in pond, the top pool wall that passes suitable for reading communicates with the topmost surface in adjacent secondary biochemical pond 2, and the bottom in pond is provided with blow-off line 62; Described secondary biochemical pond 2, press current forward approach for adjacent with one-level filtering basin 1, dark at the bottom of the contour pond of pond mouth etc., underground Reinforced Concrete Structure pond, dark at the bottom of the contour pond of pond mouth etc., be provided with in the pond and constitute by the Stainless Steel Wire that twines polymer fiber corrugation 23, the microorganism of paliform cage is cultivated bed 21, go deep into being inserted with in the pond some gas rods 22 in the cage vertically downward, plug into by interface and external air source in gas rod 22 upper ends, microorganism is cultivated to inoculate on bed 21 corrugations 23 oxygen of having a liking for probiotics, in the pool wall adjacent, be provided with " ∫ " shape and be embedded into pipeline 05 with three grades of biochemistry pools in downstream 3, the end mouth that is embedded into pipeline 05 is positioned at the bottom in pond, and the top pool wall that passes suitable for reading communicates with the topmost surface of three grades of biochemistry pools 3 in downstream, and the bottom in pond is provided with blow-off line 62; Described three grades of biochemistry pools 3 are pressed current forward approach for adjacent with secondary biochemical pond 2, and its structure, configuration are identical with secondary biochemical pond 2, but do not establish gas rod 22; Described level Four reduction pond 4, press current forward approach for adjacent with three grades of biochemistry pools 3, dark at the bottom of the contour pond of pond mouth etc., underground Reinforced Concrete Structure pond, the center in pond is provided with diving ultraviolet sterilizing lamp 41, is provided with " ∫ " shape and is embedded into pipeline 05 in the pool wall adjacent with downstream Pyatyi clean water basin 5, and the end mouth that is embedded into pipeline 05 is positioned at the bottom in pond, the top pool wall that passes suitable for reading communicates with the topmost surface of the Pyatyi clean water basin 5 in downstream, and the bottom in pond is provided with blow-off line 62; Described Pyatyi clean water basin 5 are pressed current forward approach for adjacent with level Four reduction pond 4, and dark at the bottom of the contour pond of pond mouth etc., underground Reinforced Concrete Structure pond is provided with submersible pump 51 in the pond, and the bottom in pond is provided with blow-off line 62; Described pollution discharge pond 6 is underground Reinforced Concrete Structure open caisson, the shaft bottom face is lower than each Chi Chi bottom surface, and the borehole wall is provided with the main blow-off pipe 63 that is lower than each Chi Chi bottom surface and plugs into the blow-off line 62 of each bottom, pond, and well head is provided with residual sea water pump 61, the suction nozzle of residual sea water pump 61 places the shaft bottom, and pumping hole and municipal drainage are plugged into.

Each facility interconnected relationship of system

One-level filtering basin 1 link to each other with the view streams by upper strata, middle level, the underflow aquaporin 12 on the adjacent pool wall; One-level filtering basin 1, secondary biochemical pond 2, three grades of biochemistry pools 3, level Four reduction pond 4, Pyatyi clean water basin 5 are by being embedded into pipeline 05 polyphone in the adjacent pool wall; Pyatyi clean water basin 5 link to each other with the view streams by submersible pump 51 and water pipe thereof; Blow-off line 62 parallel connections of each bottom, pond link to each other with pollution discharge pond 6 through main blow-off pipe 63; Pollution discharge pond 6 links to each other with municipal drainage by residual sea water pump 61.

Principle of work

The dirt water in view streams enters in the one-level filtering basin 1 by the flowing water passage 12 that is located at upper strata on one-level filtering basin 1 pool wall, middle level, lower floor, filter screen 11 in being located at the pond, foreign material that will be bigger such as floating matter eliminations such as branches and leaves, rubbish, 04 of the small particle that proportion is bigger is deposited at the bottom of the pond;

Filter back water is embedded into pipeline 05 by being located in the pool wall adjacent with secondary biochemical pond 2, flow into the topmost surface in secondary biochemical pond 2 by the bottom in the pond, in the water in one-level filtering basin 1 still unprecipitated small-particle silt, make to have a liking for the cultivation base of oxygen probiotics on the corrugation 23 of a part attached to microorganism cultivation bed 21, a part then is deposited at the bottom of the pond, gas rod 22 injects water with air, increase the dissolved oxygen amount in the water, cultivate and promote to cultivate and have a liking for the oxygen probiotics on the bed 21 and quicken organic pollutant and nitrogen phosphorus plant nutrient in the picked-up degradation of sewage, become primary purification water;

Primary purification water is embedded into pipeline 05 by being located in the pool wall adjacent with three grades of biochemistry pools 3, flow into the topmost surface of three grades of biochemistry pools 3 by the bottom in the secondary biochemical pond 2, still unprecipitated suspension small-particle silt in secondary biochemical pond 2 on a small quantity in the water, make to have a liking for the cultivation base of oxygen probiotics on the corrugation 23 of a part attached to microorganism cultivation bed 21, a part then is deposited at the bottom of the pond, primary purification water slowly flows through microorganism cultivates bed 21, residual organic pollutant and nitrogen phosphorus plant nutrient are had a liking for the oxygen beneficial microorganism and are absorbed degraded once more in the water, become secondary-cleaned water;

Secondary-cleaned water is embedded into pipeline 05 by being located in the pool wall adjacent with level Four reduction pond 4, flow into the topmost surface in level Four reduction pond 4 by the bottom in three grades of biochemistry pools 3, in the water on a small quantity in three grades of biochemistry pools 3 still unprecipitated suspension small-particle silt continue precipitation at the bottom of the pond, by being located at diving ultraviolet sterilizing lamp 41 sterilization and disinfection in the pond, become reductive water;

Reductive water is embedded into pipeline 05 by being located in the pool wall adjacent with Pyatyi clean water basin 5, flow into the topmost surface of Pyatyi clean water basin 5 by the bottom in the level Four reduction pond 4, regularly adjust the pH value of Chi Shui, Xiang Shuizhong throws in flocculation agent and promotes outstanding absurd creature to precipitate at the bottom of the pond, obtain the reduction clear water, will reduce the upstream recycle in clear water blowback view streams by submersible pump in the pond 51;

Each pond bottom settlings can't decompose mud impurity, by separately the bottom blow-off line 62 be pooled in the pollution discharge pond 6 through main blow-off pipe 63, through harmless treatment, pump into municipal drainage by residual sea water pump 61.

Claims (1)

1. the ecological microbially decontaminate treatment system of water scenery water body, comprise one-level filtering basin (1), secondary biochemical pond (2), three grades of biochemistry pools (3), level Four reduction pond (4), Pyatyi clean water basin (5), pollution discharge pond (6), it is characterized in that: described one-level filtering basin (1) are pressed current forward approach for adjacent with the view streams, Chi Kou and upper strata, view streams are contour, be deeper than the underground Reinforced Concrete Structure pond of view streams bottom at the bottom of the pond, be equipped with the desirable pocketed filter screen (11) that goes out to put in the pond, on the pool wall adjacent, be respectively equipped with upper strata with the view streams with the view streams, the middle level, the flowing water passage (12) that lower floor's water body communicates, in the pool wall adjacent, be provided with " ∫ " shape and be embedded into pipeline with secondary biochemical pond, downstream (2), the end mouth that is embedded into pipeline is positioned at the bottom in pond, the top pool wall that passes suitable for reading communicates with the topmost surface in adjacent secondary biochemical pond (2), and the bottom in pond is provided with blow-off line (62); Described secondary biochemical pond (2), press current forward approach for adjacent with one-level filtering basin (1), dark at the bottom of the contour pond of pond mouth etc., underground Reinforced Concrete Structure pond, dark at the bottom of the contour pond of pond mouth etc., be provided with in the pond and constitute by the Stainless Steel Wire that twines polymer fiber corrugation (23), the microorganism of paliform cage is cultivated bed (21), go deep into being inserted with in the pond some gas rods (22) in the cage vertically downward, plug into by interface and external air source in gas rod (22) upper end, microorganism cultivation bed (a 21) corrugation (23) is gone up inoculation the oxygen of having a liking for probiotics, in the pool wall adjacent, be provided with " ∫ " shape and be embedded into pipeline with the three grades of biochemistry pools in downstream (3), the end mouth that is embedded into pipeline is positioned at the bottom in pond, and the top pool wall that passes suitable for reading communicates with the topmost surface of three grades of biochemistry pools (3) in downstream, and the bottom in pond is provided with blow-off line (62); Described three grades of biochemistry pools (3) are pressed current forward approach for adjacent with secondary biochemical pond (2), and its structure, configuration are identical with secondary biochemical pond (2), but do not establish gas rod (22); Described level Four reduction pond (4), press current forward approach for adjacent with three grades of biochemistry pools (3), dark at the bottom of the contour pond of pond mouth etc., underground Reinforced Concrete Structure pond, the center in pond is provided with diving ultraviolet sterilizing lamp (41), is provided with " ∫ " shape and is embedded into pipeline in the pool wall adjacent with downstream Pyatyi clean water basin (5), and the end mouth that is embedded into pipeline is positioned at the bottom in pond, the top pool wall that passes suitable for reading communicates with the topmost surface of the Pyatyi clean water basin (5) in downstream, and the bottom in pond is provided with blow-off line (62); Described Pyatyi clean water basin (5) are pressed current forward approach for adjacent with level Four reduction pond (4), and dark at the bottom of the contour pond of pond mouth etc., underground Reinforced Concrete Structure pond is provided with submersible pump (51) in the pond, and the bottom in pond is provided with blow-off line (62); Described pollution discharge pond (6) is underground Reinforced Concrete Structure open caisson, the shaft bottom face is lower than each Chi Chi bottom surface, the borehole wall is provided with the main blow-off pipe (63) that is lower than each Chi Chi bottom surface and plugs into the blow-off line (62) of each bottom, pond, well head is provided with residual sea water pump (61), the suction nozzle of residual sea water pump (61) places the shaft bottom, and pumping hole and municipal drainage are plugged into;

Each facility interconnected relationship of system is that one-level filtering basin (1) link to each other with the view streams by upper strata, middle level, the underflow aquaporin (12) on the adjacent pool wall; One-level filtering basin (1), secondary biochemical pond (2), three grades of biochemistry pools (3), level Four reduction pond (4), Pyatyi clean water basin (5) are contacted by the pipeline that is embedded in the adjacent pool wall; Pyatyi clean water basin (5) link to each other with the view streams by submersible pump (51) and water pipe thereof; The blow-off line (62) of each bottom, pond is in parallel to link to each other with pollution discharge pond (6) through main blow-off pipe (63); Pollution discharge pond (6) links to each other with municipal drainage by residual sea water pump (61).

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