CAILu,CHENJun,FENGHao.Discussion on Key Design Parameter of Municipal Sludge Aerobic Fermentation Project: Fermentation Cycle[J].China Water & Wastewater,2022,38(18):72-77.
城市污泥好氧發(fā)酵工程關(guān)鍵設計參數(shù)發(fā)酵周期探討
- Title:
- Discussion on Key Design Parameter of Municipal Sludge Aerobic Fermentation Project: Fermentation Cycle
- Keywords:
- sludge; aerobic fermentation; composting; drying; fermentation cycle; maturity
- 摘要:
- 發(fā)酵周期是決定城市污泥好氧發(fā)酵工程能否達到預期運行效果的關(guān)鍵設計參數(shù)，也是影響工程占地面積和工程造價的重要參數(shù)。從脫水減量化、高溫無害化、穩(wěn)定腐熟化等角度，結(jié)合發(fā)酵產(chǎn)物用途、標準要求和工程實踐，探討適宜的好氧發(fā)酵周期，為工程設計提供借鑒。研究表明，至少15 d的主發(fā)酵周期才能達到脫水減量化和無害化部分指標要求。若產(chǎn)物用于焚燒，主發(fā)酵周期可設為15 d；若用于土地改良，主發(fā)酵周期至少設為20 d；若進行農(nóng)林地利用，建議主發(fā)酵后接續(xù)后腐熟，全周期至少設為30 d。因此，在工程實踐中，主發(fā)酵周期至少設為15 d，后腐熟時間可根據(jù)產(chǎn)物用途設為5~15 d或更長。
Abstract:- Fermentation cycle is a key design parameter that determines whether the municipal sludge aerobic fermentation project can achieve the expected performance, and also an important parameter that affects the project footprint area and construction investment. From the aspects of dehydration reduction, microbial inactivation and maturity, the suitable aerobic fermentation cycle was discussed based on the product applications, standard requirements and engineering practices, which aimed to provide reference for engineering design. The main fermentation cycle to meet part of the dehydration reduction and microbial inactivation index requirements should be at least 15 days. If the product was used for incineration, the main fermentation cycle could be set to 15 days, and at least 20 days for soil conditioner. If the product was used as fertilizer in farmland or forestland, it was recommended that the whole cycle of main fermentation and subsequent maturity should be at least 30 days. In engineering practice, the main fermentation cycle should be at least 15 days, and the maturity cycle could be set to 5-15 days or longer depending on the use of the product.
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