A new type of feeding process of activated sludge treatment of coking wastewater, which comprises the following steps: pretreatment of coking wastewater before preliminary sedimentation in the sedimentation tank, filter water impurities in larger solid particles; adding magnesium salt and phosphate salt water with flocculation pool, magnesium salt and phosphate and ammonia nitrogen in water the chemical reaction of sediment removal from waste water; flocculation pool into the reaction tank, the ozone in the reaction tank, improve water biodegradability and reduce the toxicity of wastewater, ozone dosage of 0.2 ~ 1g / liter wastewater; air flotation oil, further improve the biodegradability of wastewater; biochemical treatment. After pretreatment of coking wastewater into the biochemical treatment process of coking wastewater, first into a biochemical pool, as denitrification carbon source, and then Enter the 0 stage biochemical tank, oxidation and nitrification in the aerobic environment, in the 0 grade in the biochemical pool of activated sludge and flocculant reaction, condensation due to sludge group Baotuan, large volume, internal to the anoxic condition, the sludge group external aerobic nitrification reaction layer using death as the carbon source for biological denitrification the nitration reaction, removing part of the ammonia; 0 stage biochemical pool mixed liquid return to a biochemical pool, the reflux ratio is 200 ~ 500%, further denitrification in 0 grade 0 class in the biochemical pool; biochemical pool of water into the sedimentation tank two; processing system from the supernatant of two clarifier out after entering a sludge a part of backflow into the biochemical pool and 0 biochemical pool, to reduce the loss of nitrifying bacteria, ensure stable microbial flora and biochemical pool; the other part into the sludge thickening tank; A biochemical pool and 0 biochemical pool temperature control 20 ~ 35 DEG C, pH value of 7 ~ 8.5, the dosage of flocculant was 10 ~ 40mg / L; after treatment: supernatant in the level of processing system in which the ozone oxidation reaction, and catalytic with ultraviolet rays, ultraviolet dosage is 0.1 ~ 1KW / per ton of wastewater, ozone dosage of 0.2 ~ 1g / liter wastewater, further degradation of refractory material, and has decoloration effect; oxide impurity into the biofilter, to meet emission standards.
【技术实现步骤摘要】
本专利技术发涉及一种新型投料活性污泥法处理焦化废水工艺,属于环境保护与 废水处理
技术介绍
焦化废水是一种很难处理的废水,它含有酚类、氰化物、氨氮以及苯系物等 很多种有毒有害物质,约占焦化废水含量的60%。目前的焦化废水处理方法很多, 但处理后的COD和氨氮等有害物质很难达标,特别是氨氮浓度很高。氨氮是水体 中危害较大的污染因子,它会导致河流、湖泊的富营养化,使水体自净能力减弱。 污染水体的氨氮通常指以氨形态存在的氮,相对其他有机污染物来说,污染水体 中氨氮的去除难度大得多。现有去除氨氮的工艺组成侧重点有物化法、生物法。物化法工艺主要是焦化废水首先经过物化处理,去除大部分的C0D、氨氮、 酚等物质,然后出水再经生物处理,此种方法效果好,处理出水水质稳定,抗冲 击能力强、设备占地面积小等优点,但存在运行费用大(8 15元/吨.水),多 数用于小型焦化厂废水处理。生物法工艺主要是焦化废水首先经过气浮等物理手段预处理后,再经缺 氧反硝化反应、好氧硝化反应等生物处理手段,缺氧反硝化反应是指硝酸盐和亚 硝酸盐氮被还原为气态氮的过程,即在缺氧条件下,利用有机物作为电子供体, 反硝化细菌将硝酸盐和亚硝酸盐氮被还原为气态氮;好氧硝化反应是在好氧条件 下,氨氮在硝化菌的作用下氧化为硝酸盐或亚硝酸盐氮。经过缺氧、好氧反应后 一般最终出水水质氨氮、C0D很不稳定,达标率比较低,且系统占地面积巨大。
技术实现思路
专利技术目的本专利技术的目的在于克服现有技术的不足,提供一种经处理后废水 达到排放标准的新型投料活性污泥法处理焦化废水工艺。技术方案 一种新型投料活性污泥 ...
【技术保护点】
一种新型投料活性污泥法处理焦化废水工艺,其特征在于包括如下步骤: 预处理:焦化废水先在沉淀池内进行初步沉淀,滤去水中较大的固体颗粒杂质;在絮凝沉淀池的配水区加入镁盐-磷酸盐,镁盐-磷酸盐与水中氨氮进行化学反应生成沉淀物去除;从絮凝沉淀池出来的废水原液进入转化反应池,在转化反应池内通入臭氧,提高水的可生化性及降低废水毒性,臭氧用量0.2~1g/每升废水;气浮去油,进一步提高废水的可生化性; 生化处理:经过预处理的焦化废水进入生化处理工序,焦化废水首先进入A级生化池,为反硝化提供碳源,然后进入0级生化池,在好氧环境下进行氧化及硝化反应,在0级生化池内活性污泥与加入的絮凝剂反应,凝聚抱团,由于污泥团体积较大,内部为缺氧状态,污泥团外部进行好氧硝化反应,内层利用死亡生物作为碳源进行缺氧反硝化反应,脱除部分氨氮;0级生化池混合液回流至A级生化池,回流比为200~500%,在0级生化池内进一步进行反硝化反应;0级生化池出水进入二沉池;从二沉池出来的上清液进入后级处理系统,沉淀污泥一部分回流进入A级生化池和0级生化池,减少硝化菌流失,确保生化池中微生物菌群稳定;另一部分进入污泥浓缩池; 其中A级生化 ...
【技术特征摘要】
【专利技术属性】
技术研发人员:洪树虎,洪树平,吴建强,鲁舜峰,王盘云,王培,
申请(专利权)人:江苏百纳环境工程有限公司,
类型:发明
国别省市:32
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