KR100473539B1 - Method and apparatus for the removal of total nitrogen(T-N) from wastewaters - Google Patents
Method and apparatus for the removal of total nitrogen(T-N) from wastewaters Download PDFInfo
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- KR100473539B1 KR100473539B1 KR10-2002-0018156A KR20020018156A KR100473539B1 KR 100473539 B1 KR100473539 B1 KR 100473539B1 KR 20020018156 A KR20020018156 A KR 20020018156A KR 100473539 B1 KR100473539 B1 KR 100473539B1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
Abstract
본 발명은 각종 산업체에서 발생되는 폐수 중 현재국내에서 보유하고 있는 기존설비로는 총질소(T-N)량 배출허용기준치(60 mg/L 이하)의 범위를 만족시키기 어려운 고농도 폐수를 저렴한 시설비와 간단한 처리장치 및 공정으로도 처리 가능토록 하는 폐수처리방법과 그 장치에 관한 것이다.The present invention is a wastewater generated by various industries, the existing facilities currently owned in the country, the high concentration wastewater difficult to meet the range of the total nitrogen (TN) emission allowance standard value (60 mg / L or less) of low cost and simple treatment The present invention relates to a wastewater treatment method and an apparatus for treating the same by an apparatus and a process.
즉, "여과공정 → 탈기공정"으로 하는 기본처리공정으로 하되, 처리코자 하는 폐수의 농도에 따라서 선택공정인 "여과공정 → 화학분해공정 → 탈기공정"으로 선택 처리될 수 있도록 하는 것과; 상기 여과공정을 통하여 여과된 폐수에 대하여 pH 12로 조절하고, 탈기공정에서 온도 60℃로 설정한 후 상기 기본처리공정 또는 선택처리공정을 각 수행토록 함과 동시에 상기 화학분해공정에서는 Decoage C의 화학분해제를 첨가하여 유입되는 폐수중의 총질소(T-N)량을 최소량으로 제거할 수 있음에 따라서 수질오염방지 및 수질환경개선은 물론 각종 산업체에서 저렴한 비용으로 보다 쉽게 고농도 폐수를 처리 가능토록 하는 것이다.That is, a basic treatment step of "filtration process → degassing process", but the selective process "filtering process → chemical decomposition process → degassing process" according to the concentration of waste water to be treated so as to be selectively treated; The wastewater filtered through the filtration process was adjusted to pH 12, the temperature was set to 60 ° C. in the degassing process, and the basic treatment or selective treatment was performed. By adding a decomposing agent, the total amount of nitrogen (TN) in the incoming wastewater can be removed to a minimum amount, thereby preventing water pollution and improving the water environment, and making it easier to treat high concentration wastewater at low cost in various industries. .
Description
본 발명은 고농도 폐수의 총질소 제거방법 및 그 장치에 관한 것으로서, 더욱 상세히는 각종 산업체에서 발생되는 폐수 중 현재국내에서 보유하고 있는 기존 설비로는 총질소(T-N)량 배출허용기준치(60 mg/L 이하)의 범위를 만족시키기 어려운 고농도 폐수를 저렴한 시설비와 간단한 처리장치 및 공정으로도 처리 가능토록 하는 폐수처리방법과 그 장치에 관한 것이다.The present invention relates to a method for removing total nitrogen of high concentration wastewater and its apparatus, and more specifically, to existing facilities currently owned in Korea among wastewater generated by various industries, the total nitrogen (TN) emission allowance threshold (60 mg / The present invention relates to a wastewater treatment method and apparatus for treating high concentration wastewater, which is difficult to satisfy the range of L or less), with a low facility cost and a simple treatment apparatus and process.
현재 국내에서 고농도의 총질소를 효과적으로 제거하기 위한 수처리 장치의 개발은 거의 없는 상태로 총질소를 배출하는 산업체에서는 그 처리에 고심을 하고 있고, 국외에서 기술 및 처리공법을 수입을 할 경우에는 장치가 고가이므로 경제적으로 어려움이 많다. At present, there is almost no development of water treatment apparatus to effectively remove high concentration of total nitrogen in Korea, and the industry that discharges total nitrogen is striving for the treatment, and when importing technology and treatment method from abroad, Because of the high price, there are many economic difficulties.
즉, 선진국에서는 총질소를 제거할 수 있는 수처리 공법으로 A2O, Five-stage, Bardenpho, VIP, UCT 등이 개발되고 있는데, (대한환경공학회지, Vol. 20, No. 2, pp. 161-170, 1998)In other words, A2O, Five-stage, Bardenpho, VIP, UCT, etc. are being developed in developed countries to remove total nitrogen. (Korean Journal of Environmental Engineering, Vol. 20, No. 2, pp. 161-170, 1998)
이 또한 고농도가 아닌 중 - 저 농도의 총질소 제거에 중점을 두고 있기 때문에 고농도의 총질소 제거에 이들 공법을 적용하기는 부족함이 많아 실제 적용하지 못하고 있는 실정이다.In addition, since the emphasis is placed on the removal of high and low concentrations of medium and low concentrations of total nitrogen, these methods cannot be applied to the removal of high concentrations of total nitrogen.
이러한 문제로 인하여 고농도의 폐수가 지속적으로 발생하는 각 업체에서는 적절한 처리방안을 찾지 못한 나머지 고심 끝에 급기야는 하천 등에 불법으로 배출한다거나 매립하는 등 수질환경을 오염시키는 주요원인이 되었던 것이다.Due to these problems, each company that continuously generates high concentrations of wastewater did not find a proper treatment method, and after a long time of deliberation, air supply was a major cause of polluting the water environment, such as illegally discharging or reclaiming it into a river.
이에 본 발명에서는 상기와 같은 문제점을 일소하기 위해 발명한 것으로서, 물리적, 화학적 처리공법인 급속 여과, 화학분해 및 탈기공법과 아울러 그 공법수행 중 회분식, 연속식 공정을 통하여 폐수중의 고농도 충질소를 보다 신속하고도 효과적으로 제거할 수 있도록 하는데, 주안점을 두고 그 기술적 과제로서 완성한 것이다. Therefore, the present invention was invented to solve the above problems, and the high concentration of the filling nitrogen in the wastewater through the batch filtration, continuous process as well as the rapid filtration, chemical decomposition and degassing method of physical and chemical treatment methods It can be removed quickly and effectively, with the main focus on completing the technical task.
상기의 목적을 달성하기 위하여 본 발명은 첨부된 각 도면과 실험결과 도표 등에 의거하여 보다 상세히 설명하면 하기와 같다.In order to achieve the above object, the present invention will be described in detail with reference to the accompanying drawings and experimental results.
즉, 본 발명에서는 고농도의 충질소를 가지는 폐수를 폐수 배출허용기준치인 60㎎/ℓ이하로 제거하는 폐수처리방법과 그 방법에 사용될 수 있는 처리장치를 제공하는 바, 그 장치로는 도 1에 도시된 바와 같이 유입되는 폐수를 저장하는 원수탱크(10)를 구비하고, 그 원수탱크(10)의 일측에 모래(21)가 충진된 급속모래 여과탑(20)을 구성함과 동시에 그 일측으로 교반기를 가진 pH조절조(30), 탈기탑(40), 처리수조로 각각 배관연결 구비하되, 상기 pH조절조(30)와 급속모래 여과탑(20) 사이의 다른 배관으로 연결된 조정조(50), 화학분해탑(60)이 각각 배관으로 연결 구성된다.That is, the present invention provides a wastewater treatment method for removing wastewater having a high concentration of filling nitrogen to 60 mg / l or less, which is an allowable discharge standard of wastewater, and a treatment apparatus that can be used in the method. As shown in the drawing, a raw water tank (10) for storing the inflow of wastewater is provided, and at one side of the raw water tank (10), the sand sand is filled with the rapid sand filtration tower (20). PH control tank 30 having a stirrer, degassing tower 40, the treatment tank is provided with a pipe connection, respectively, the adjustment tank 50 connected to the other pipe between the pH control tank 30 and the rapid sand filtration tower (20) , The chemical decomposition tower 60 is configured to be connected to each pipe.
상기한 급속모래여과탑(20)은 모래(21)가 충진되어 있어 공급되는 폐수를 1차 여과하여주는 역할을 하며, 상기 pH조절조(30)에서는 상기 급속모래여과탑(20)에서 여과된 폐수에 대하여 교반기를 이용해 교반하면서 NaOH액으로 pH를 조절하기 위한 것이다.The rapid sand filtration tower 20 is filled with sand (21) serves to primary filter the wastewater supplied, the pH control tank 30 is filtered in the rapid sand filtration tower (20) It is for adjusting pH with NaOH liquid while stirring with a stirrer with respect to waste water.
그리고 상기 탈기탑(40)은 내통(42)과 외통(41)이 2중 원통으로 구성되는데, 그 외통(41)에는 온도조절장치(43)가 설치되어 있어 유입된 폐수가 일정온도를 설정 조절될 수 있도록 하고, 상기 내통(42)의 내부에는 raschig ring(45)을 채워 기체와 액체의 접촉면을 극대화하여 유입되는 폐수의 하향흐름으로 상부에서 분사되게 함과 동시에 하부에는 송풍기(44)가 구비되어 있어 공기를 주입시키면서 폭기토록 함으로 처리코자하는 고농도 폐수를 1차 처리될 수 있도록 하는 것이다.And the degassing tower 40 is composed of a double cylinder of the inner cylinder 42 and the outer cylinder 41, the outer cylinder 41 is provided with a temperature control device 43 is installed wastewater to adjust the set temperature The inner cylinder 42 is filled with a raschig ring 45 to maximize the contact surface between the gas and the liquid to be injected from the upper side of the flow of the incoming wastewater and the blower 44 is provided at the bottom. By aeration while injecting air, the high concentration of wastewater to be treated can be treated first.
한편, 상기 급속여과탑(20)의 일측 pH조절조(30)와 탈기탑(40) 사이에 는 PUMP가 설치된 조정조(50)와 교반기를 가지는 화학분해탑(50)이 다른 배관으로 연결케 하여 추가 구성함으로서, 상기 급속모래여과탑(20)에서 바로 탈기탑(40)을 거치는 1차 처리공정만으로는 처리가 어려운 고농도 폐수를 상기 추가설비인 화학분해탑(50)으로 유입시켜 교반과 함께 화학분해제(Decoage C)와 반응하게 하여 보다 높은 효율로 분해제거 될 수 있도록 하였다. 화학분해제는 통상의 폐수를 분해하기 위해 사용되어지고 있는 성분인 K2SO4, Al2O3, CuSO4를 적절히 혼합하여 사용할 수가 있는데, 본발명에서는 2:1:1의 비율을 적용하여 실시하였다. On the other hand, between the pH control tank 30 and the degassing tower 40 of the rapid filtration tower 20, the chemical decomposition tower 50 having a control tank 50 and a stirrer with a PUMP is connected to another pipe By further configuring, the high-density wastewater difficult to be treated only by the first treatment process directly passing through the degassing column 40 directly from the rapid sand filtration tower 20 is introduced into the chemical decomposition tower 50 as the additional facility, and the chemical powder is stirred. It was reacted with Decoage C so that it could be decomposed with higher efficiency. Chemical decomposers can be used by appropriately mixing K 2 SO 4 , Al 2 O 3 , CuSO 4 , which are components used to decompose ordinary wastewater, and in the present invention, a ratio of 2: 1: 1 is applied. Was carried out.
상기와 같은 폐수처리장치를 통한 본 발명의 폐수처리공정은 처리코자하는 폐수를 총질소량에 따라서 선택 처리될 수 있도록 하기와 같이 기본공정과 선택공정으로 이루어진다.Wastewater treatment process of the present invention through the wastewater treatment device as described above consists of a basic process and a selection process as described below to be selectively treated according to the total nitrogen amount of wastewater to be treated.
즉, 급속모래여과탑(20)을 거치는 "여과공정" 과 → pH조절조 (30)및 탈기탑(40)을 거치는 "탈기공정" 을 거처 폐수를 처리하는 것을 기본공정(여과공정-탈기공정)으로 하되,That is, the " filtration process" through the rapid sand filtration tower 20 and → Treatment of wastewater through a "degassing process" through a pH control tank (30) and a degassing column (40) is a basic process ( filtration process-degassing process ),
위 기본공정만으로는 처리가 불가능한 고농도 폐수를 처리하고자 하는 경우는 상기 "여과공정"과 "탈기공정" 사이에 "화학분해공정"을 포함하는 선택공정(여과공정-화학분해공정, 탈기공정)을 수행하게 되면 폐수에 함유된 총질소량에 대하여 보다 높은 제거율을 얻을 수 있어 총질소량이 높은 고농도의 폐수까지도 처리 가능하다.If you want to treat high concentration wastewater that cannot be treated with the above basic process alone, the above "filtration process" and "degassing process" If the selective process including " chemical decomposition process" ( filtration process, chemical decomposition process, degassing process ) is carried out between them, a higher removal rate can be obtained with respect to the total nitrogen contained in the wastewater, so that even high concentration wastewater with high total nitrogen content can be obtained. It can be processed.
이와 같이 기본공정과 선택공정으로 구분하는 것은 상기 원수탱크(10)에서 유입되는 폐수 중에서 총질소량이 다소 낮은 폐수일 경우는 상기 기본처리공정만으로 처리가 가능하지만 농도가 극히 높은 고농도 폐수일 경우는 그 기본공정에 화학분해공정을 포함시킨 선택공정으로 수행하는 것이 보다 높은 처리 효과를 기대할 수 있다.In this way, the basic process and selection process can be divided into the wastewater flowing in the raw water tank 10, if the total nitrogen is somewhat low wastewater can be treated only by the basic treatment process, but in the case of high concentration wastewater with a very high concentration Higher treatment effects can be expected if the process is carried out with an optional process that includes a chemical decomposition process in the basic process.
그리고 상기한 폐수처리장치와 처리공정을 통한 pH, 반응온도 및 탈기시간 등의 변화가 총질소 제거효율에 중요한 반응변수 등을 하기의 실시예와 첨부된 도면의 실험결과표를 각 참고하여 상세히 살펴보면,And the reaction variables such as pH, the reaction temperature and the degassing time through the wastewater treatment apparatus and the treatment process is important to the total nitrogen removal efficiency, etc. Looking at each of the following examples and the experimental results table of the accompanying drawings in detail,
실시예)Example
상기 원수탱크를 통과한 폐수는 유속 60 ml/min 으로 유지되어 급속모래여과탑(20)에 도달시켜 여과하며, 상기 탈기탑(40)에서 시료수 탈기시 공기 주입량을 폐수 유량 1 L 당 500 ml/min 로 하였다. Waste water passing through the raw water tank is maintained at a flow rate of 60 ml / min to reach the rapid sand filtration tower 20 and filtered, 500 ml per 1 L of waste water flow rate when the sample water is degassed in the degassing tower 40 It was / min.
그리고 도 2는 도시된 바와 같이 급속모래여과탑(20)을 거친 시료수의 수온 20℃, 탈기시간 60 min 실험조건에서 pH 를 일정범위로 변화시켰을 경우의 총질소 제거효율 및 pH 변화를 나타낸 것이다.(pH 변화에 따른 처리수의 총질소 농도 및 pH 변화를 나타낸 것임.)And Figure 2 shows the total nitrogen removal efficiency and pH change when the pH is changed to a certain range in the water temperature 20 ℃, degassing time 60 min experimental conditions of the sample water passed through the rapid sand filtration tower 20 as shown in FIG. (Shows total nitrogen concentration and pH change of treated water according to pH change.)
그 결과 총질소 초기농도 1,014 mg/L 인 시료수는 pH 를 11 로 증가시켰을 경우 약 62 % 의 제거효율을 보이다가, pH 를 12, 12.5 및 13 로 더욱 증가하게 되면 제거효율은 완만한 증가추세를 보여 65%, 68%정도 범위에서 정상상태(steady-state)를 유지하게 됨을 알 수 있었다.As a result, the sample number with the initial total concentration of 1,014 mg / L showed a removal efficiency of about 62% when the pH was increased to 11, and the removal efficiency gradually increased as the pH was further increased to 12, 12.5 and 13. It showed that the steady-state was maintained in the range of 65% and 68%.
한편, 처리수의 pH 는 시료수 pH 11 에서는 9.1, 12 에서는 9.9 로 크게 감소하고 있으나, 12.5, 13 에서는 감소폭이 크게 줄어든 12.2, 12.7 로 비슷한 범위를 나타나고 있는데, 이것은 시료수중의 암모니아성 질소 (NH3-N) 가 pH 12.5 이전의 영역에서는 거의 다 제거되기 때문이다. 따라서 총질소 제거를 위한 탈기공정의 적당한 pH 범위는 12 ~ 12.5, 탈기시간은 40 ~ 100 min 범위에서 60 min 의 최적값을 제공한다. On the other hand, the pH of the treated water was greatly decreased to 9.1 and 12 at 9.9 in sample water, but it was similarly reduced to 12.2 and 12.7 at 12.5 and 13, indicating that ammonia nitrogen (NH3) in the sample water was reduced. -N) is almost eliminated in the region before pH 12.5. Therefore, the optimum pH range of the degassing process for total nitrogen removal is 12 to 12.5, and the degassing time is 60 min in the range of 40 to 100 min.
도 3 은 급속모래여과탑(20)을 거친 시료수를 탈기공정에서 수온 20℃, pH 12.5, 탈기시간 60min에서 온도를 일정하게 변화시켰을 경우의 실시예를 나타낸 것이다.(온도변화에 따른 처리수의 총질소 농도변화를 나타낸 것임.)Figure 3 shows an example of changing the temperature of the sample water passed through the rapid sand filtration tower 20 at a constant temperature at 20 ° C, pH 12.5, 60 min degassing time in the degassing process. Shows total nitrogen concentration change.)
그 실험조건은 총질소 초기농도 1,039 mg/L 인 시료수가 온도 30℃ 에서 355.7 mg/L 로 크게 감소하고 있으며, 온도를 40, 50, 60℃ 로 더욱 증가함에 따라 총질소 농도도 285.6 mg/L, 197 mg/L, 134 mg/L (약 87% 제거효율)로 각각 감소하는 뚜렷한 제거효과를 보여주고 있다. 따라서, 총질소 제거에 대한 온도의 영향은 증가함에 따라 비례하여 증가하는 상관관계를 보여주고 있으나, 온도상승에 필요한 에너지 비용과 배출 허용 기준 40℃ 를 만족시키기 위해 적합한 온도는 60℃ 로 제시된다.Under the experimental conditions, the number of samples with initial concentration of 1,039 mg / L of total nitrogen was greatly reduced to 355.7 mg / L at 30 ℃, and the total nitrogen concentration was 285.6 mg / L as temperature increased further to 40, 50, and 60 ℃. , 197 mg / L and 134 mg / L (approximately 87% removal efficiency), respectively, showing a clear removal effect. Therefore, although the effect of temperature on total nitrogen removal is increasing in proportion to the increase in temperature, a suitable temperature is suggested as 60 ° C to satisfy the energy cost required for temperature rise and the emission limit of 40 ° C.
도 4 는 급속모레 여과탑(여과)과 pH조절조(pH조절), 탈기탑(탈기)의 순서로 된 처리순서와 장치의 위치를 달리하였을 경우 그 위치변화에 따른 총질소 제거효과를 나타낸 것으로서,Figure 4 shows the effect of total nitrogen removal according to the position change when the position of the apparatus and the order of treatment in the order of rapid day filtration tower (filtration), pH control tank (pH control), degassing tower (degassing) ,
이는 총질소 초기농도 518 mg/L 인 시료수 A 를, B(pH조절 - 여과 - 탈기) 공정으로 처리하면 잔류 농도는 46 mg/L 이며, 이에 반하여 C(여과 - pH조절 - 탈기) 공정으로 처리하면 8.7 mg/L이고, D(pH조절 - 탈기 - 여과) 공정으로 처리하면 26 mg/L 으로 나타났다.The sample concentration A, the initial concentration of 518 mg / L of total nitrogen, was treated with B (pH control-filtration-degassing) and the residual concentration was 46 mg / L, while C (filtration-pH control-degassing) was performed. Treatment was 8.7 mg / L and treatment with D (pH-degassing-filtration) showed 26 mg / L.
따라서, 시료수를 먼저 여과하고 pH 조절후 탈기시키는 것이 가장 효과적임을 알 수 있으며, 총질소 제거를 위한 정량적 최적조건은 급속모래 여과후 pH 12, 온도 40 ℃, 탈기시간 60 min 을 가지는 기술이다. 처리중에 NH3-N 의 탈기에 따라 시료수의 pH 가 감소하는 경향을 나타내므로 총질소 제거효율 향상과 탈기시간 단축 (예, 30 min) 을 위해서 pH 12 를 계속 유지하는 방법을 포함한다. Therefore, it can be seen that it is most effective to filter the sample water first and degassing after adjusting the pH, and the quantitative optimum condition for total nitrogen removal is a technique having a pH of 12, a temperature of 40 ° C., and a degassing time of 60 min after rapid sand filtration. Since the pH of the sample water tends to decrease due to the degassing of NH3-N during the treatment, the method includes maintaining a pH of 12 to improve the total nitrogen removal efficiency and shorten the degassing time (eg, 30 min).
도 5 는 화학분해탑(60)에서 화학분해제를 첨가하였을 경우의 총질소 제거효율에 미치는 일 예를 나타낸 것으로서,Figure 5 shows an example of the effect on the total nitrogen removal efficiency when the chemical decomposition agent is added in the chemical decomposition tower 60,
이는 탈기공정만으로 고농도(>1,000 mg/L)의 총질소를 60 mg/L 이하로 제거하기는 어려우므로, NH3-N 과 달리 org-N 을 분해시킬 수 있는 화학분해제 Decoage C 가 합성, 개발되었다. 총질소 초기농도 1,023 mg/L 를 탈기공정에 의해 254 mg/L 까지 감소시킨 후 전술한 Decoage C 를 10 g/L 첨가후 30 min 분해반응을 시킨 경우 잔류 총질소 농도는 49 mg/L (95% 이상 제거효율) 까지 감소하였다.It is difficult to remove high concentration (> 1,000 mg / L) of total nitrogen below 60 mg / L only by degassing process. Therefore, unlike NH3-N, Decoage C, a chemical decomposer that can decompose org-N, is synthesized and developed. It became. When the total nitrogen initial concentration of 1,023 mg / L was reduced to 254 mg / L by the degassing process, and then 30 min decomposition after adding 10 g / L of Decoage C described above, the residual total nitrogen concentration was 49 mg / L (95 Removal efficiency (% or more).
이와 같은 실시예를 통하여 상기 급속모래여과탑(20)을 통과한(여과공정) 시료수를 pH 조절조(30)에서 pH 12로 조절한 다음, 상기 탈기탑(40)의 온도조절장치(43)에서 온도 60℃로 설정하게되면,(탈기공정) 500 mg/ℓ정도의 총질소(T-N)량을 가지는 고농도 폐수를 배출허용기준 60 mg/ℓ이하로 제거 처리할 수 있다는 것을 알 수 있었고,(즉, 여과공정-탈기공정, 2개의 공정수행만으로 가능) ---- 기본처리공정 Through such an embodiment, the sample water passing through the rapid sand filtration tower 20 (filtration process) is adjusted to pH 12 in the pH control tank 30, and then the temperature control device 43 of the degassing tower 40 is provided. In the case of setting the temperature to 60 ° C, it can be seen that the high concentration wastewater having a total nitrogen (TN) amount of about 500 mg / ℓ can be removed below the emission limit of 60 mg / ℓ. (I.e., filtration process, degassing process, only two processes can be performed) ---- Basic treatment process
또, 상기 탈기공정에 의하여 처리된 처리수에서 잔류하는 충질소에 대해서는 그 충질소의 대부분이 org-N임에 따라서 상기 org-N을 분해하는데 탁월한 기능을 가진 Decoage C의 화학 분해제를 상기 화학분해탑(60)에서 반응시킴(화학분해공정)과 1000 mg/ℓ정도의 총질소(T-N)량을 가지는 잔류 충질소를 배출허용기준 60 mg/ℓ이하로 제거 처리할 수 있다는 것을 알 수 있었다.(즉, 여과 - 화학분해- 탈기, 중간에 화학분해공정이 포함됨.) → 선택처리공정 In addition, as for most of the filling nitrogen remaining in the treated water treated by the degassing step, the chemical decomposing agent of Decoage C having an excellent function of decomposing the org-N, since most of the filling nitrogen is org-N, Reaction column (chemical decomposition process) and the residual nitrogen having a total nitrogen (TN) amount of about 1000 mg / ℓ in the decomposition tower 60 was found to be able to remove less than 60 mg / ℓ to the emission limit. (that is, for filtering chemical decomposition-stripping is included, chemical decomposition in the middle of the process) → selection process
상기한 결과를 볼 때 처리코자 하는 고농도 폐수의 총질소 농도가 500 mg/ℓ정도일 경우는 상기 기본공정만으로 배출허용기준치를 달성할 수 있었지만 1000 mg/ℓ이상일 경우는 상기 중간에 화학공정을 포함한 선택처리공정으로 처리되어야만 가능하다는 것을 알 수 있었다.In view of the above results, when the total nitrogen concentration of the high concentration wastewater to be treated is about 500 mg / l, the emission standard could be achieved only by the above basic process, but when it was more than 1000 mg / l, the selection including the chemical process was performed. It can be seen that it can only be processed by the treatment process.
이상 본 발명의 바람직한 실시 예에 대하여 설명하였지만, 본 발명은 이에 한정되는 것이 아니고 특허 청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위안에서 여러 가지로 변형하여 실시하는 것이 가능하고, 이 또한 본 발명의 범위에 속하는 것은 당연하다.As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to this, It can be variously modified and implemented in a claim, the detailed description of an invention, and the range of an accompanying drawing, and also this invention Naturally, it belongs to the range of.
상기 설명한 바와 같이 본 발명은 폐수중의 총질소(T-N)의 효과적 제거방법에 있어서, 급속모래여과, 화학분해 및 탈기공정이 복합적으로 구성된 물리, 화학적 처리방법을 제공함과 동시에 각 처리공정에서 여과 유속, pH 조절범위, 시료수 온도, 탈기시간 및 화학분해제 주입량 등에 대한 최적 반응조건을 제시함으로써, 고농도 폐수가 가지는 총질소량을 배출허용기준 60 mg/L을 만족시킬 수 있어 지금까지 각종 산업체에서 처리하는데 상당한 어려움 가지고 있었던 고농도의 폐수를 용이하게 처리할 수 있음은 물론 이로 인하여 수질오염 예방 및 수질환경개선에도 크게 도움을 줄 수 있는 등 그 기대되는 바가 다대한 발명이다. As described above, the present invention provides a physical and chemical treatment method comprising a combination of rapid sand filtration, chemical decomposition, and degassing in an effective removal method of total nitrogen (TN) in wastewater, and at the same time the filtration flow rate in each treatment process. By presenting the optimum reaction conditions for the pH control range, sample water temperature, degassing time, and chemical decomposer injection amount, the total nitrogen content of high concentration wastewater can satisfy the emission limit of 60 mg / L. In addition, it is possible to easily treat high concentrations of wastewater, which has had considerable difficulty, and this can greatly help in preventing water pollution and improving the water environment.
도 1은 본 발명의 T-N 제거 폐수처리장치 및 그 공정 개략도1 is a schematic view of the T-N removal wastewater treatment apparatus and its process of the present invention
도 2는 pH 변화에 따른 처리수의 총질소 농도 및 pH 변화를 나타낸 도표2 is a graph showing the total nitrogen concentration and pH change of the treated water according to the pH change
도 3은 온도변화에 따른 처리수의 총질소 농도를 나타낸 도표3 is a chart showing the total nitrogen concentration of the treated water according to the temperature change
도 4는 일부 처리공정의 순서를 변화시킴에 따른 총질소 제거효과를 나타낸 도표Figure 4 is a diagram showing the effect of removing total nitrogen according to the order of some treatment process
도 5는 화학분해탑에 유입된 시료수에 화학 분해제를 첨가하여 반응시켰을 경우의 총질소 제거효율에 미치는 영향을 나타낸 도표5 is a diagram showing the effect on the total nitrogen removal efficiency when the reaction by adding a chemical decomposition agent to the sample water introduced into the chemical decomposition tower
□ 도면의 주요부분에 대한 부호의 설명 □□ Explanation of symbols for main parts of drawing □
10:원수탱크 20:급속모래여과탑10: raw water tank 20: rapid sand filtration tower
21:모래 30:pH조절조21: sand 30: pH adjustment tank
40:탈기탑 41:외통40: deaeration tower 41: outer cylinder
42:내통 43:온도조절장치42: inner cylinder 43: temperature controller
44:송풍기 45: RASCHIG RING44: blower 45: RASCHIG RING
50:조정조 60:화학분해탑50: adjustment tank 60: chemical decomposition tower
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