Waste permeate treatment
With the economic development and the improvement of the quality of life, the amount of garbage generated is increasing, which has become a problem of widespread concern at home and abroad. At present, the landfill method is used, with asphalt as the bottom, a layer of garbage and a layer of soil, and pipelines are embedded in the garbage layer in order to export harmful gases and exudate. Because the composition of the garbage is complex, chemical and enzymatic reactions are performed after filling, so the composition of the exudate is also quite complicated. 高、可生化性差、重金属离子浓度高等污染因子产生。 The existing pollution factors such as high ammonia nitrogen concentration, high COD , poor biodegradability, and high heavy metal ion concentration are shown. With the increase of garbage accumulation time, the pollution factors in the permeate also change, so it is difficult to handle.
I. Current governance status and options:
、化学法：采用加药（氧化还原）——气浮——絮凝三段处理法，虽有一定效果，但占地面积大，基建投资高，运行成本高（吨费用为30 － 50元），维修量大，对渗透液中部份污染因子难以去除，不能确保稳定达标。 1. Chemical method: The three-stage method of dosing (oxidation reduction)-air flotation-flocculation is used. Although it has certain effects, it has a large area, high capital investment, and high operating costs ( 30 to 50 yuan per ton). ), The maintenance amount is large, it is difficult to remove some pollution factors in the permeate, and it cannot ensure the stability to meet the standards.
、生化法：采用活性污泥法、延时曝气法、生物膜法，对于COD ＞ 50000mg/L的高浓度有机废水首先采用厌氧生物法，然后再采用好氧生物法，将其降解。 2. Biochemical method: Activated sludge method, extended aeration method, and biofilm method are adopted. For high-concentration organic wastewater with COD > 50000mg / L , the anaerobic biological method is adopted first, and then the aerobic biological method is used to degrade it. . However, bacterial enzyme conversion requires specific conditions, such as air temperature, types and concentrations of pollution factors. － 600 ）生化法就难以进行。 Special permeate contains sulfides, cyanides, heavy metals, linear aliphatic hydrocarbon compounds, alcohols, monophenols, fatty acids, amino acids, heterobenzenes, and high molecular compounds (molecular weight> 250-600 ). Difficult.
、超强氧化还原废水处理装置（ CYH法）：该技术是由我公司独立研制开发的新技术，已获国家专利（专利号201020104226.3 ）。 3. Super-redox wastewater treatment device ( CYH method): This technology is a new technology independently developed by our company and has obtained national patent (patent number 201020104226.3 ). 去除率>70% ，一般经电化学去除率>30% ，然后进入生化系统，皆能保证稳定达标。 This technology overcomes the shortcomings of biochemical and chemical methods, and has outstanding degradation effects on various inorganic substances, organic substances and heavy metals. , Organic wastewater and other treatments can reach the standard stably (level 1). The treatment of garbage permeate shows that the COD removal rate is > 70% , generally the electrochemical removal rate is > 30% , and then enter the biochemical system to ensure stable compliance. .
Second, the new technology of garbage permeate treatment:
(1) Low operating cost
Electric energy is used as the pulse energy source. The source is convenient and cheap. The intermediate uses non-toxic and stable substances. The source is rich and cheap, which greatly reduces the operating cost (8-10 yuan per ton).
(2) High degradation efficiency: Pollution factors in the permeate are rapidly degraded due to the four functions co-existing (oxidation, reduction, decolorization, deodorization, and flocculation) after the system is turned on. The effect is very significant. Because MYS uses pulsed excitation energy, it has the ability to cut and decompose macromolecules, and can be adjusted freely according to the state of the permeate to achieve the best effect, so the COD degradation rate can reach more than 90%. Because the application of this technology uses an excitation zone --- a reaction zone --- a deep filtration adsorption zone, the permeate treatment is completed in one step, continuously and automatically.
(3) Scope of application:
If the depth filtration adsorption zone is not used, the electroplating wastewater, circuit board wastewater, leather wastewater, and emulsion wastewater can be directly up to the standard at one time (level 1).
If a deep filtration adsorption zone is used: As the activity of wastewater and pollution factors is increased by MYS technology, the adsorption effect of the deep filtration is increased by a factor of 100, and the biochemical effect of the filter material in the adsorption zone greatly improves the ability to degrade COD. Degradation effect of high concentration, heterobenzenes, phenols, difficult-to-degrade organic matter and soluble organic matter is significantly improved.
(4) Small footprint, easy to manage and maintain, and long service life.
3. Waste permeate treatment process: