山東億達環保技術工程有限公司是始創于1994年的環保企業。本公司經過三十年的不懈進取，在工業廢水、市政污水、水生態修復及自來水地表水源脫氮等領域創建完成了多項交鑰匙工程。贏得了用戶和環保部門的信賴，并于1999年8月就獲得國家環境保護總局頒發的《環境工程設計證書》。

2005-2009年，公司轉型曝氣設備的創新研發。先后獲得以潛浮式曝氣機和潛浮式推流攪拌機為核心的污水處理系列裝備；先后取得中華人民共和國國家知識產權局和美利堅合眾國專利與商標局頒發的共8項發明專利證書（1.潛浮式曝氣機,專利號200610168196.0；2.由導氣筒直接進氣的潛浮式曝氣機，專利號200710165152.7；3.回轉潛浮式曝氣機，專利號200810089642.8；4.多向潛浮式曝氣機，專利號200910160936.X；5.Submersible Hollow Shaft Motor and Submersible Floating Aerator Comprising the Same，專利號7661658；6.Swing-Type Submersible Floating Aerator，專利號7661659；7.Multi-directional Submersible Floating Aerator，專利號7934705；8.Aeration Ship, 專利號8998179）。

2010-2015年，在中國濟南與環保界學者專家共同形成“中層曝氣”新概念，與傳統之底層曝氣、表層曝氣、雙壓噴射射流曝氣三大體系并列其中。底曝、表曝、中曝、噴射射流曝氣形成污水處理廠四種曝氣裝備并存階段。

2016-2020年，中曝機與三大傳統體系并列混裝實踐。在不停產插裝混合運行多家用戶后，全部產生了出水質量上升，噸水處理成本下降的效果。與業主形成老污水廠提標改造采用“多曝合一，提標降耗”共識。

2021-2024年，在智慧水務提改背景推動下，升級的全數控回轉噴射推流曝氣機系列，使老污水廠系統強化了同池硝化/反硝化功能;把氨氮、總氮降到一級A到四類地表水質標準 。在回轉、推流、攪拌綜合作用下，將各種曝氣系統混裝A/O釋放在活性污泥中的氮氣吹脫干凈。有厭氧選擇池的各類氧化溝、A2O池中插裝后，不僅能脫氨氮、總氮，同時又能深度生物脫除總磷。除此之外，提改之后的噸水成本降低30%-50%左右。污泥減量30%以上，提改費用大幅下降。

全數控回轉噴射推流曝氣、攪拌系列插裝升級后，用戶確立了下列三個創新點。

（1）確立“中曝插裝”老污水廠改造不新建水池，不排水排泥。

（2）確立“多曝合一” 老污水廠改造池頂插裝設備，原設備自動清理復原。

（3）確立“精 確曝氣” 老污水廠改造升級為準中水處理廠。避開老污水廠反復改造。

       Shandong Yida Environmental Technology & Engineering Co., Ltd. is a company established in 1994. During the past three decades, the company has been dedicated in innovation, application and continuous improvement in industrial and municipal sewage treatment, ecological restoration and nitrogen removal of surface water. The company has successfully completed a range of sewage treatment turnkey projects for many customers by implementing state-of-the-art technologies. We used highly efficient technologies in various industrial sewage projects to achieve the goal of low investment, low operating costs and high effluent quality. Since the after-sale service was excellent, the company has won great reputation from the customers and the environmental protection agencies. In August 1999, the company received the Certificate of Environmental Engineering Design issued by the State Environmental Protection Administration.

From the year of 2005 to 2009, the company shifted to the innovation of new aeration devices and has successfully developed the submersible floating aerator and mixer as core equipments for wastewater treatment plants. The company has successively obtained eight patent certificates issued by China National Intellectual Property Administration and United States Patent and Trademark Office (1. Submersible Floating Aerator, patent number 200610168196.0; 2. Submersible Floating Aerator With Direct Air Intake From the Air Tube, patent number 200710165152.7; 3. Swing-type Submersible Floating Aerator, patent number 200810089642.8; 4. Multi-directional Submersible Floating Aerator, patent number 200910160936.X; 5. Submersible Hollow Shaft Motor and Submersible Floating Aerator Comprising the Same, patent number 7661658; 6. Swing-type Submersible Floating Aerator, patent number 7661659; 7. Multi-directional Submersible Floating Aerator, patent number 7934705; 8. Aeration Ship, patent number 8998179).

From the year 2010 to 2015, the concept of "middle layer aeration" was jointly developed by environmental scholars and experts in Jinan, China. The concept of middle-layer aeration co-exists with the other three major aeration systems, namely, bottom aeration, surface aeration and dual pressure jet aeration.

From the year 2016 to 2020, the company started the mashup phase by inserting its middle-layer aerators into the basins consisting of bottom and surface aeration systems. After implementing middle-layer aeration with no production suspension, the effluent quality rised and treatment cost declined dramatically. We have reached a consensus with the plant owners to adopt the "multiple aeration modes in one basin" approach for the retrofit of the WWTP.

From the year 2021 to 2024, in the background of smart water management, digital controlled submersible floating aerator and mixer strengthened simultaneous nitrification and denitrification (SND) function in the old sewage treatment plant system. Furthermore, the ammonia nitrogen and total nitrogen level of the effluent was reduced to Class A/Class IV surface water quality standards. Under the combined action of rotation, pushing flow, and stirring, various aeration systems are mixed to activate A/O, and the nitrogen released in the activated sludge is blown off completely. After being inserted into various oxidation ditches and A2O tanks with anaerobic selective tanks, not only can ammonia nitrogen and total nitrogen be efficiently removed, but also total phosphorus can be biologically removed thoroughly. In addition, the cost per ton of water after the improvement has been reduced by about 30% -50%. The sludge reduction is more than 30% and the cost of retrofit is reduced significantly.

There are three innovative points for the retrofit of digital controlled submersible floating aerator and mixer.

(1) The renovation of old sewage treatment plants with the insertion of middle-layer aerators does not require addition of new basin or sludge discharge.

(2) Establish "multi exposure integration" for the renovation of old sewage treatment plants, install equipment at the top of the tank, and automatically clean and restore the original equipment.

(3) Establish the transformation and upgrading of "precise aeration" old sewage treatment plants as standard intermediate water treatment plants. Avoid the repeated renovation of old sewage treatment plants.