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          行業資訊 公司動態

          污水處理技術發展趨勢

          2019-10-24

          具有脫氮除磷功能的污水處理工藝仍是今后發展的重點
           
          Wastewater treatment process with nitrogen and phosphorus removal function is still the focus of future development
           
           
           
          《城鎮污水處理廠污染物排放標準》(GB18918-2002)對出水氮磷有明確的要求,因此已建城鎮污水處理廠需要改建,增加設施去除污水中的氮、磷污染物,達到國家規定的排放標準,新建污水處理廠則須按照標準GB18918-2002來進行建設。
           
          The discharge standard for pollutants of urban sewage treatment plant (GB18918-2002) has clear requirements for nitrogen and phosphorus in the effluent. Therefore, the existing urban sewage treatment plant needs to be rebuilt, and facilities should be added to remove nitrogen and phosphorus pollutants in the sewage, so as to meet the national discharge standard. The new sewage treatment plant must be constructed according to the standard GB18918-2002.
           
           
           
          目前,對污水生物脫氮除磷的機理、影響因素及工藝等的研究已是一個熱點,并已提出一些新工藝及改革工藝。如MSBR、倒置A2/O、UCT等,并且積極引進國外新工藝。對于脫氮除磷工藝,今后的發展要求不僅僅局限于較高的氮磷去除率,而且也要求處理效果穩定、可靠、工藝控制調節靈活、投資運行費用節省。目前,生物除磷脫氮工藝正是向著這一簡潔、高效、經濟的方向發展。
           
          At present, the research on the mechanism, influencing factors and process of biological nitrogen and phosphorus removal from sewage has become a hot spot, and some new processes and reform processes have been put forward. Such as MSBR, inverted A2 / O, uct, etc., and actively introduce new technology from abroad. For nitrogen and phosphorus removal process, the future development requirements are not only limited to high nitrogen and phosphorus removal rate, but also require stable and reliable treatment effect, flexible process control and adjustment, and saving investment and operation costs. At present, biological phosphorus and nitrogen removal technology is developing towards this simple, efficient and economic direction.
           
           
           
          高效率、低投入、低運行成本、成熟可靠的污水處理工藝是今后污水處理廠的首選工藝
           
          High efficiency, low input, low operation cost, mature and reliable sewage treatment process is the preferred process of sewage treatment plant in the future
           
           
           
          我國是一個發展中國家,經濟發展水平相對落后,而面對我國日益嚴重的環境污染,國家正加大力度來進行污水的治理,而解決城市污水污染的根本措施是建設以生物處理為主體工藝的二級城市污水處理廠。
           
          China is a developing country with a relatively backward level of economic development. In the face of increasingly serious environmental pollution in China, the country is stepping up efforts to carry out sewage treatment. The fundamental measure to solve the urban sewage pollution is to build a secondary urban sewage treatment plant with biological treatment as the main process.
           
           
           
          但是,建設大批二級城市污水處理廠需要大量的投資和高額運行費,這對我國來說是一個沉重的負擔。而目前我國的污水處理廠建設工作,則因為資金的缺乏很難開展,部分已建成的污水處理廠由于運行費用高昂或者缺乏專業的運行管理人員等原因而一直不能正常運行,因此對高效率、低投入、低運行成本、成熟可靠的污水處理工藝的研究是今后的一個重點研究方向。
           
          However, the construction of a large number of secondary urban sewage treatment plants requires a lot of investment and high operating costs, which is a heavy burden for China. At present, the construction of sewage treatment plants in China is difficult to carry out due to the lack of funds. Some of the completed sewage treatment plants have been unable to operate normally due to high operating costs or lack of professional operation management personnel. Therefore, the research on high efficiency, low investment, low operating cost, mature and reliable sewage treatment process is a key research party in the future. Xiang.
           
           
           
          對適用于小城鎮污水處理廠工藝的研究
           
          Study on the technology of sewage treatment plant in small town
           
           
           
          發展小城鎮是我國城市化過程的必由之路,是具有中國特色的城市化道路的戰略性選擇。1978~2000年我國建制鎮由2178個增至20312個,目前各種規模和性質的小城鎮已近48000個。如果只注重大中城市的污水處理工程的建設,而忽視如此數量多的小城鎮的污水治理,則我國的污水治理也不能達到預定目標。
           
          The development of small towns is the only way in the process of urbanization in China, and it is the strategic choice of urbanization with Chinese characteristics. From 1978 to 2000, the number of towns in China increased from 2178 to 20312. At present, there are nearly 48000 small towns of various scales and natures. If we only pay attention to the construction of sewage treatment projects in large and medium-sized cities, but ignore the sewage treatment in such a large number of small towns, then the sewage treatment in China can not achieve the intended goal.
           
           
           
          而對于小城鎮的污水處理又面對著一系列的問題:小城鎮污水的特點不同于大城市;小城鎮資金短缺;運行管理人員缺乏等。因此,小城鎮的污水處理工藝應該是基建投資低、運行成本低、運行管理相對容易、運行可靠性高的工藝。目前對適用于小城鎮污水處理廠工藝的研究方向是:從現有工藝中比選出適合小城鎮污水處理廠的工藝,同時開發出適用于小城鎮污水處理廠的新工藝。
           
          And for the small town sewage treatment is facing a series of problems: the characteristics of small town sewage is different from the big city; the small town capital shortage; the lack of operation and management personnel. Therefore, the sewage treatment process in small towns should be a process with low capital construction investment, low operation cost, relatively easy operation management and high operation reliability. At present, the research direction of the process suitable for small town sewage treatment plant is: select the process suitable for small town sewage treatment plant from the existing process, and develop a new process suitable for small town sewage treatment plant.
           
           
           
          對產泥量少、且污泥達到穩定的污水處理工藝的研究
           
          Study on sewage treatment process with low sludge production and stable sludge
           
           
           
          目前,污水處理廠所產生的污泥的處理也是我國污水處理事業中的一個重點和難點,2003年中國城市污水廠的總污水處理量約為95.9562×108/a,城市平均污水含固率為0.02%,則濕污泥產量為965.562×104t/a,并且污泥的成份很復雜,含有多種有害有毒成分,如此產量大而且含有大量有毒有害物質的污泥如果不進行有效處理而排放到環境中去,則會給環境帶來很大的破壞。
           
          At present, the treatment of sludge produced by sewage treatment plants is also a key and difficult point in China's sewage treatment industry. In 2003, the total sewage treatment capacity of China's urban sewage plants was about 95.9562 × 108 / A, the average solid content of urban sewage was 0.02%, the wet sludge output was 965.562 × 104t / A, and the composition of sludge is very complex, containing a variety of harmful and toxic components, so the output is large and If sludge containing a lot of toxic and harmful substances is discharged into the environment without effective treatment, it will bring great damage to the environment.
           
           
           
          目前我國污泥處理處置的現狀不容樂觀:據統計,我國已建成運行的城市污水處理廠,污泥經過濃縮、消化穩定和干化脫水處理的污水廠僅占25.68%,不具有污泥穩定處理的污水廠占55.70%,不具有污泥干化脫水處理的污水廠約占48.65%。
           
          At present, the current situation of sludge treatment and disposal in China is not optimistic: according to statistics, only 25.68% of the urban sewage treatment plants that have been built and operated in China have been treated by sludge thickening, digestion and drying dehydration, 55.70% of the sewage plants that do not have sludge stabilization treatment, and 48.65% of the sewage plants that do not have sludge drying and dehydration treatment.
           
           
           
          這說明我國70%以上的污水廠中不具有完整的污泥處理工藝而對此問題進行解決的一個有效辦法是:污水處理廠采用產泥量少、且污泥達到穩定的污水處理工藝控制工程網版權所有,這樣就可以在源頭上減少污泥的產生量,并且可以得到已經穩定的剩余污泥,從而減輕了后續污泥處理的負擔。
           
          This shows that more than 70% of the sewage plants in our country do not have complete sludge treatment process, and an effective way to solve this problem is: the sewage treatment plant adopts a sewage treatment process with low sludge production and stable sludge to control the copyright of the engineering network, so that the sludge production can be reduced at the source, and the stable residual sludge can be obtained, so as to reduce the sludge production. It lightens the burden of subsequent sludge treatment.
           
           
           
          目前,我國已有部分工藝可做到這一點,如生物接觸氧化法工藝、BIOLAK工藝、水解-好氧工藝等,但是對產泥量少、且污泥達到穩定的污水處理工藝的系統研究還沒有開始。
           
          At present, some processes in our country can achieve this, such as biological contact oxidation process, BIOLAK process, hydrolysis aerobic process, etc., but the systematic research on sewage treatment process with low sludge production and stable sludge has not yet begun.
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