ZHANG Hua-jun,LI Yao-jie,LI Sen,et al.Comprehensive Treatment of a Lake with Input of Severe Pollution Source[J].China Water & Wastewater,2020,36(21):28-34.
重度污染源匯入湖泊綜合治理工程的實踐
- Title:
- Comprehensive Treatment of a Lake with Input of Severe Pollution Source
- 關(guān)鍵詞:
- 富營養(yǎng)化; 污染負荷; 綜合治理; 水質(zhì)提升
摘要:- 為探索出一套有效的重度污染源匯入湖泊治理技術(shù)體系，創(chuàng)新性應(yīng)用“污染源前處理+湖體水生態(tài)系統(tǒng)構(gòu)建”綜合技術(shù)體系于工程實
踐，采用修建初期雨水調(diào)蓄池、生活污水截流進污水廠、污水廠尾水人工濕地提標(biāo)、湖體構(gòu)建水生態(tài)系統(tǒng)等措施對海口市某湖泊進行綜合治理，并從化學(xué)及生物指標(biāo)等方面進行全面評價。實踐結(jié)果表明，前處理工程使外源污染負荷得到極大降低，可為后續(xù)生態(tài)修復(fù)創(chuàng)造條件，直排污水通過污水廠處理后，氨氮和總磷濃度分別降低了63.55%和84.2%，尾水經(jīng)過人工濕地處理后氨氮濃度降低了59.5%，CODMn濃度降低了74.5%。水生態(tài)系統(tǒng)構(gòu)建2個月后，水體清澈見底，主要水質(zhì)指標(biāo)明顯優(yōu)于治理前，3個月后水生態(tài)系統(tǒng)持續(xù)穩(wěn)定，水體溶解氧濃度逐漸上升，氨氮濃度持續(xù)下降，總磷濃度也有一定程度的降低，浮游動物生物量及種類顯著增加，實現(xiàn)了污染湖泊治理的目標(biāo)。此外，配合應(yīng)急措施構(gòu)建的水生態(tài)系統(tǒng)能在雨季一定雨污溢流后保持較穩(wěn)定狀態(tài)，具備一定抵抗外界干擾的能力。
Abstract:- Comprehensive technical system of “contamination source pretreatment and lake water ecosystem construction” was innovatively applied in engineering practice to explore a set of effective heavy polluted lake governance technology system. A series of comprehensive treatment measures such as construction of initial rainwater storage tank, sewage interception into wastewater treatment plant, treatment of tail water by constructed wetland and construction of water ecosystem were used in a lake in Haikou City, and the treatment effect was comprehensively evaluated from chemical and biological indicators. The pretreatment projects greatly reduced the external pollution load and created conditions for the subsequent ecological restoration. After the direct discharged wastewater was treated by the wastewater treatment plant, the concentration of NH3-N and TP was reduced by 63.55% and 84.2%, respectively. The concentration of NH3-N and CODMn in tail water decreased by 59.5% and 74.5% after treated by constructed wetland. After 2 months of water ecosystem construction, the water was clear, and the main water quality indicators were significantly better than those before treatment. After three months, the water ecosystem continued to be stable, DO gradually increased, NH3-N concentration continued to decrease, TP concentration also decreased to a certain extent, and the zooplankton biomass and species increased significantly, indicating that the lake governance goal was achieved. In addition, the water ecosystem built with emergency measures could maintain a relatively stable state after receiving a certain amount of rainwater and sewage overflow in wet season, and had a certain ability to resist external disturbances.
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