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摘要
本設(shè)計(jì)為某啤酒廠啤酒廢水處理工藝設(shè)計(jì)。啤酒廢水水質(zhì)的主要特點(diǎn)是含有大量的有機(jī)物，屬高濃度有機(jī)廢水，故其生化需氧量也較大。該啤酒廢水處理廠的處理水量為5000 m3/d。原污水中各項(xiàng)指標(biāo)為：BOD濃度為1200 mg/L,COD濃度為2000 mg/L，SS濃度為700 mg/L。因該廢水BOD值和COD值較大,不經(jīng)處理會(huì)對(duì)環(huán)境造成巨大污染，故要求處理后的排放水要嚴(yán)格達(dá)到國(guó)家二級(jí)排放標(biāo)準(zhǔn),即：BOD≤20 mg/ L，COD≤100 mg/ L，SS≤70 mg/ L。
經(jīng)分析知該處理水質(zhì)屬易生物降解又無(wú)明顯毒性的廢水，可采用兩級(jí)生物處理以使出水達(dá)標(biāo)。一級(jí)處理主要采用物理法，用來(lái)去除污水中的懸浮物質(zhì)和無(wú)機(jī)物。二級(jí)處理主要采用生物法,包括厭氧生物處理法中的UASB法和好氧生物處理法中的SBR法，可有效去除污水中的BOD、COD。本設(shè)計(jì)工藝流程為：
啤酒廢水 → 格柵 → 污水提升泵房 → 調(diào)節(jié)沉淀池 → UASB反應(yīng)器→預(yù)曝氣沉淀池→ SBR池 →處理水（污泥）
整個(gè)工藝具有總投資少，處理效果好，工藝簡(jiǎn)單，占地面積省，運(yùn)行穩(wěn)定，能耗少的優(yōu)點(diǎn)。
關(guān)鍵詞：啤酒廢水處理，高濃度有機(jī)廢水，UASB法，SBR法
Abstract
This design is the brewery water treatment of a Beer Company. The main distinguishing feature of the brewery water is that it contains massive organic matters and it belongs to the high concentration organic wastewater, so its biochemical oxygen demand is also high. The water which needs to be treated in the beer wastewater is 5000 . The concentrations of BOD, COD and SS are 1200 mg/L, 2000mg/L and 700 mg/L, respectively. For the high value of BOD and COD for the brewery water, it can pollute the environment if it is discharged without disposal. So it is required to be strictly meet the secondary discharge standard of National Wastewater Discharge Standards which requests BOD≤20 mg/ L, COD≤100 mg/ L, SS≤70 mg/ L.
After the analysis, the brewery water can biodegrade easily and has no obvious toxicity, so we use two levels of biological treatment to treat the drained water meet the designated standard. The first level of processing mainly uses the physical methods, which remove the suspended matter and the inorganic substance in the wastewater. The second level of processing is the biological methods, contains UASB (Up flow anaerobic sluge blanket) of anaerobic oxygen biology methods and SBR (Sequencing Batch Reactor) of demand oxygen biology methods, which could reduce BOD and COD in the waste water. The technological process of this design is:
Beer wastewater → Screens →Swage lift pump house → Regulates sendimatation tank →Tank of UASB →pre-aeration sedimentation tank → Tank of SBR →Treatment water (sludge) .
The technology has many advantages such as low investment, high efficiency, simple process, less occupied area, steady running and energy saving.
Keyword: Brewery Water，High Concentration of Organic Wastewater，UASB Process，SBR Process
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