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首頁> 中文期刊> 《環(huán)境科學(xué)研究》 >SBR反應(yīng)器內(nèi)碳基好氧顆粒污泥的培養(yǎng)及其穩(wěn)定運(yùn)行特性

SBR反應(yīng)器內(nèi)碳基好氧顆粒污泥的培養(yǎng)及其穩(wěn)定運(yùn)行特性

     
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A new method to accelerate the granulation process by inoculating 1.0 g/L powder activated carbon (PAC) with particle size 75 μm together with 35 mg/L of Ca2+ in sequencing batch reactor (SBR) was studied,as well as the pilot scale cultivation and stable operation performance of carbon-based aerobic granular sludge (AGS).The results showed that aerobic granular sludge with a good settling performance was formed within 14 days in the reactor,and the degree of sludge granulation reached 80.0％ in 18 days at normal temperature.During the stabilization phase of 100 d,AGS could mainly remain in complete forms.At the same time,the mixed liquor suspended solids (MLSS) ranged from 3300 mg/L to 4050 mg/L,and the slugged volume index (SVI) changed from 120 mL/g to 35 mL/g.In addition,polysaccharides (PS) content was low and changed little,but the proteins (PN) concentration kept improving in the cultivation period and stable operation phases,finally reaching 240 mg/g MLVSS,andthe PN/PS remained at approximately 15.00.Meanwhile,during the whole stable operation phase,the average removal rate of chemical oxygen demand,total nitrogen and total phosphorus reached 82.0％,76.5％ and 96.0％,respectively.The results showed that the adsorption and shear force between ordinary flocculent sludge and PAC accelerated the granulation process;meanwhile,the PAC acted as an inner core which kept the AGS stable and prevented it from being disintegrated.%為探究粉末活性炭和鈣離子的投加對污泥顆?；M(jìn)程的影響,在300 L SBR(序批式反應(yīng)器)中接種普通絮狀污泥,投加1.0 g/L粒徑約75 μm的PAC(粉末活性炭)及35 mg/L的Ca2+以促進(jìn)污泥顆?；M(jìn)程,并研究其穩(wěn)定運(yùn)行特性.結(jié)果表明:常溫下反應(yīng)器在14 d內(nèi)開始形成具有良好沉降性能的AGS(好氧顆粒污泥),至第18天污泥顆?；潭冗_(dá)到80.O％左右;在此后運(yùn)行的100 d內(nèi),AGS基本能保持其結(jié)構(gòu)完整性.同時,反應(yīng)器內(nèi)ρ(MLSS)(污泥濃度)由接種時的3 300 mg/L升至4 050 mg/L,污泥SVI(體積指數(shù))由接種時的120 mL/g變?yōu)?5 mL/g.w(PS)(PS為胞外多糖)較少且變化量小;w(PN)(PN為胞外蛋白)在反應(yīng)器啟動及穩(wěn)定運(yùn)行階段內(nèi)都在提高,最終達(dá)到240 mg/g(以每g MLVSS中含PS的質(zhì)量計(jì)),PN/PS(質(zhì)量比)最終穩(wěn)定在15.00左右.穩(wěn)定運(yùn)行期間,反應(yīng)器對污水中CODCr、TN、TP的平均去除率分別達(dá)到82.0％、76.5％和96.0％.研究顯示,投加的PAC與普通絮狀污泥間的吸附作用,促進(jìn)了污泥的顆?；M(jìn)程;同時,PAC作為AGS的惰性成核物質(zhì),避免了AGS因內(nèi)源呼吸從顆粒內(nèi)部解體,提高了AGS的穩(wěn)定性.

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