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  • 生活污水处理的工艺介绍
  • 本站编辑:浙江金鸣环境科技有限公司发布日期:2020-01-05 19:18 浏览次数:

一、污水处理站设备一级强化处理工艺:

一级强化处理,应根据城市污水处理设施建设的规划要求和建设规模,选用物化强化处理法、AB法前段工艺、水解好氧法前段工艺、高负荷活性污泥法等技术。

二、污水处理站设备二级处理工艺:

1、日处理能力在二十万立方米以上(不包括20立方米/日)的污水处理设施,一般采用常规活性污泥法,也可采用其他成熟技术。

2、日处理能力在10~20万立方米的污水处理设施,可选用常规活性污泥法、氧化沟法、SBR法和AB法等成熟工艺。

3、日处理能力在十立方米一下的污水处理设施,可选用氧化沟法、SBR法、水解好氧法、AB法和生物滤池等技术,也可选用常规活性污泥法。

三、污水处理站设备二级强化处理:

1、二级强化处理工艺是指除有效去除碳源污染物外,且具备较强的除磷脱氮功能的处理工艺。

2、在对氮、磷污染物有控制要求的地区,日处理能力在十万立方米以上的污水处理设施,一般选用A/O法、A/A/O法等技术,也可审慎选用其他的同效技术。

3、日处理能力在十万立方米以下的污水处理设施,除采用A/O法、A/A/O法外,也可选用具有除磷脱氮效果的氧化沟法、ABR法、水解好氧法和生物滤池法等。

4、必要时也可选用物化方法强化除磷效果。

四、污水处理站设备自然净化处理工艺:

1、在严格进行环境影响评价、满足国家有关标准要求和水体自净能力要求的条件下,可审慎采用城市污水排入大江或深海的处置方法。

2、在有条件的地区,可利用荒地、闲地等可利用的条件,采用各种类型的土地处理和稳定塘等自然净化技术。

3、城市污水二级处理出水不能满足水环境要求时,在条件许可的情况下,可采用土地处理系统和稳定塘等自然净化技术进一步处理。

4、采用土地处理技术,应严格防止地下水污染。

五、污水处理站设备污泥处理:

1、城市污水处理产生的污泥,应采用厌氧、好氧和堆肥等方法进行稳定处理。也可采用卫生填埋方法予以妥善处置。

2、日处理能力在十万立方米以上的污水二级处理设施产生的污泥,宜采取厌氧消化工艺进行处理,产生的沼气应综合利用。

3、日处理能力在十万立方米以下的污水处理设施产生的污泥,可进行堆肥处理和综合利用。

4、采用延时曝气的氧化沟法、SBR法等技术的污水处理设施,污泥需达到稳定化。采用物化一级强化处理的污水处理设施,产生的污泥须进行妥善的处理和处置。

5、经过处理后的污泥,达到稳定化合无害化要求的,可农田利用;不能农田利用的污泥,应按有标准和要求进行卫生填埋处置。

1. The first-level enhanced treatment process of sewage treatment plant equipment: the first-level enhanced treatment shall be carried out in accordance with the planning requirements and construction scale of urban sewage treatment facilities, physical and chemical strengthening treatment, AB process, hydrolytic aerobic process, high load activated sludge and so on are selected. Sewage Treatment Plant Equipment Secondary Treatment Process: 1, daily treatment capacity of more than two hundred thousand cubic meters, excluding 20 cubic meters per day of sewage treatment facilities, generally using conventional activated sludge, but also can use other mature technology. 2. For wastewater treatment facilities with a daily capacity of 100,000 ~ 200,000 cubic meters, mature processes such as conventional activated sludge, oxidation ditch, SBR and AB processes can be selected. 3. Wastewater treatment facilities with a capacity of less than 10 cubic metres per day may use oxidation ditch, SBR, hydrolytic aerobic, AB and biofilter technologies, or conventional activated sludge. Secondary enhanced treatment of sewage treatment plant equipment: 1. The secondary enhanced treatment process is a process which can effectively remove carbon source pollutants and has strong function of phosphorus and nitrogen removal. 2. In areas where nitrogen and phosphorus pollutants are required to be controlled, a / O method, a / A / O method and other similar technologies are generally chosen for wastewater treatment facilities with a daily capacity of more than 100,000 cubic meters. 3. Except a / O method, a / A / O method, oxidation ditch method, Abr method, hydrolytic aerobic method and biofilter method can be used to treat wastewater with a capacity of less than 100,000 cubic meters per day. 4. If necessary, physical and chemical methods can be used to enhance the effect of phosphorus removal. 1. Under the conditions of strict environmental impact assessment, meeting the requirements of relevant national standards and the requirements of the self-purification capacity of water bodies, disposal of municipal sewage into large rivers or deep sea can be used judiciously. 2. In areas where conditions permit, natural purification techniques such as land treatment and stabilization ponds can be used to make use of wasteland, idle land and other available conditions. 3. If the effluent from secondary treatment of municipal sewage can not meet the requirements of water environment, the natural purification technology such as land treatment system and stabilization pond can be used to further treat it if the conditions permit. 4. The use of Land Treatment Technology should strictly prevent groundwater pollution. Sewage Treatment Plant Equipment Sludge Treatment: 1. Sludge from municipal sewage treatment should be stabilized by ANAEROBIC, aerobic and composting methods. It can also be disposed of properly by sanitary landfill. 2. The sludge from secondary treatment facilities with a daily capacity of 100,000 cubic meters or more should be treated by anaerobic digestion process, and the biogas should be comprehensively utilized. 3. Sludge from sewage treatment facilities with a capacity of less than 100,000 cubic metres per day can be composted for treatment and comprehensive utilization. 4. The sludge should be stabilized by using oxidation ditch and SBR with time-delay aeration. Sewage treatment facilities with physico-chemical enhanced treatment I, the resulting sludge shall be properly treated and disposed of. 5. The treated sludge can be used on farmland if it meets the requirements of stabilization, chemical and innocuity; the sludge that can not be used on farmland shall be disposed of by sanitary landfill according to the standards and requirements.

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