A kind of method for treating organic material of cultivating spirulina waste water
Technical field
The present invention relates to a kind of method for treating organic material of cultivating spirulina waste water.
Background technology
1.5 ten thousand tons of former algaes of dry product of the spirulina annual production of China, during spirulina breeding is produced, according to 1 ton of spirulina dry product of 200 cubic metres of substratum breeding production, be equivalent to the substratum of annual needs 3000 ten thousand steres, this substratum overwhelming majority is water, generally processes as waste water.
The waste of cultivating spirulina contains the nutritive substances such as rich in protein, if directly discharging affects environment, particularly improves the Eutrophic Extent of receiving water body.As by recycling, can improve the utilization ratio of the nutritive substances such as protein, as feed and additive, fertilizer etc., increase economic benefit.In addition, remove organic SPIRULINA CULTIVATION waste water, the main chemical compositions of this waste water has EDTA-2Na complexing agent, nutritious carbon sourc, nutrition nitrogenous source and mineral nutrition (comprising iron, calcium, sodium, potassium, manganese plasma), can further replenish the nutritive substance that growth of spirulina platensis needs, thereby can be used as again the required substratum of cultivating spirulina.
Present spirulina breeding production unit is often away from the waste water treatment plant in cities and towns, and SPIRULINA CULTIVATION production and the method that gathers algae are dispersion culture, the respectively rinsing of gathering, and production efficiency is low, and extensive management, waste water are difficult to focus on.Therefore, many manufacturers directly discharge, and perhaps pass through simple process as the irrigation water of agricultural, and this is not only the significant wastage of raw materials for production, and has caused water pollution, ecotope constantly to worsen.
At present waste water and sewage treatment process mainly are that filtration method is combined microorganism active mud method and is processed, and equipment requirements is high, have high input operation and maintenance cost height; Changeable because waste water mixes often, therefore, very difficult protein organism of inciting somebody to action wherein effectively utilizes, and protein organism wherein can only be processed by nitrobacteria, change nitric nitrogen into from organic, and then change free state nitrogen into, reach the purpose that reduces the nitrogen content in the water body.Cultivating spirulina waste water usually adopts and is similar to the pattern that chemical industry is processed, and such as CN1903751, name is called the application for a patent for invention of " treatment technology of spirulina waste water ", discloses the treatment process of the high-salt wastewater that produces in a kind of spirulina production process.According to such production model, the production cost of per kilogram spirulina dry product need to increase by 10~30 yuan.In addition, use the cultivating spirulina waste water that this art breading contains the nutritive substances such as protein, this is also inconsistent with present low-carbon economy pattern, the a large amount of energy and the equipment of one side ammonia synthesizing industry consumption, make free state nitrogen change ammonia-state nitrogen into, reoxidize and be nitric nitrogen, the processing of waste water is just in time opposite.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method for treating organic material of cultivating spirulina waste water.
The present invention solves the problems of the technologies described above the step that adopts:
A kind of method for treating organic material of cultivating spirulina waste water, step is as follows:
A), first adopt the macrobead thing in the physical filtering method removing waste water, and in time removal sticks to the screen surface particulate matter, the method for physical filtering is removed large impurity with 80 mesh filter screens, removes small impurities with 360 purpose filter screens again;
B), carry out continuously the inflation of microbubble generating technique and bottom, make the little particulate matter of the inter-adhesive formation of organism of solubilised state, and efficiently be condensed into sheet or large-scale particulate matter, described microbubble generating technique and bottom inflation are to lay the gas-filled valve that produces micro-nano bubble in the treating pond bottom, the production well of gas-filled valve is towards the treating pond bottom or closely, solved the particulate matter deposition and stopped up production well, with the problem upwards of giving vent to anger; Downward inflation, bump becomes less microbubble at the bottom of some bubble and the pond.Utilize the cell of spirulina and the characteristics that fragment has good adhesion thereof, the chance that microbubble can provide small-particle to be in contact with one another more progressively is bonded as larger visible particle.Condense by the method for oxygenation (gas) again.
C), control treating pond degree of depth water level at 1.5~2.5 meters, by the method in obscure shallow lake, organism is further precipitated, discharge the water purification on top;
D), the organism that will be deposited to treating pond bottom transfers to Filter-screen bag, extracts moisture, dry or dry.
Described steps A) filter bag of usefulness collection of spirulina when filtering.Perhaps
Filter with a "T"-shaped pipeline, vertical pipeline is water-in, pipeline one end that is parallel to ground is water outlet, an other end arranges a valve, is conducive to take out particulate matter, connects a rolling hairbrush on the valve, under hydrodynamic effect, make the particulate matter close to filter membrane, drop on the opposite side of filter membrane, solved and filtered and the contradiction of stopping up.
The invention has the advantages that it mainly is the method that adopts machinery and physics, power consumption is few, does not adopt medicament, and water can be reused.Utilization ratio is higher, and the particulate matter of collection has further utility value, has good economic benefit, social value and ecological significance.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment 1
1. coarse filtration: remove large impurity with 80 mesh filter screens.
2. ultrafiltration: remove small impurities with 360 purpose filter screens, can adopt the filter bag of collection of spirulina to filter.
3. carry out continuously the inflation of microbubble generating technique and bottom: in treating pond, use microbubble technology and bottom inflation technology.Described microbubble generating technique and bottom inflation are to be equipped with in the treating pond bottom to produce micro-nano gas-filled valve, the production well of gas-filled valve is towards the bottom or bottom near, solve the particulate matter deposition and stopped up production well, with the problem upwards of giving vent to anger, downward inflation, bump becomes less bubble at the bottom of the bubble of some and the pond.The control water level is at 2 meters.
4. the method in obscure shallow lake is controlled water level at 2.5 meters, and organism is further precipitated, and discharges the water purification on top.
5. the organism of bottom is transferred to Filter-screen bag, extract moisture, or dry, dry.
The particulate matter of 6. collecting is as feed and fodder additives, and water can be recycled and reused for the cultivation of spirulina.
Embodiment 2
1. coarse filtration: remove large impurity with 80 mesh filter screens.
2. ultrafiltration: remove small impurities with 360 purpose filter screens.Or utilize a "T"-shaped pipeline, and vertical pipeline is water-in, and being parallel to the end that the pipeline on ground makes progress is water outlet, and an other end arranges a valve, is conducive to take out particulate matter.Connect a rolling hairbrush on the valve, under hydrodynamic effect, make the particulate matter close to filter membrane, drop on the opposite side of filter membrane, solved and filtered and the contradiction of stopping up.
3. carry out continuously the inflation of microbubble generating technique and bottom: in pipeline or treating pond, use microbubble technology and bottom inflation technology.Described microbubble generating technique and bottom inflation are to be equipped with in the treating pond bottom to produce micro-nano gas-filled valve, the production well of gas-filled valve is towards the bottom or bottom near, solve the particulate matter deposition and stopped up production well, with the problem upwards of giving vent to anger, downward inflation, bump becomes less bubble at the bottom of the bubble of some and the pond.The control water level carries out continuously the method for microbubble generating technique and bottom inflation and condenses rapidly at 1.5 meters.
4. obscure shallow lake: the control water level is further precipitated organism at 1.5 meters, discharges the water purification on top.
5. the organism of bottom is transferred to Filter-screen bag, extract moisture, or dry, dry.
The particulate matter of 6. collecting is as feed and fodder additives, and water can be recycled and reused for the cultivation of spirulina.