本文關(guān)鍵詞： 赤霉素菌渣 餐廚垃圾 混合厭氧消化　出處：《南昌大學》2016年碩士論文　論文類型：學位論文

【摘要】：赤霉素作為一種農(nóng)用抗生素因其具有植物生長促進作用而被廣泛用于農(nóng)業(yè)生產(chǎn)。赤霉素生產(chǎn)過程中會產(chǎn)生赤霉素菌渣,赤霉素菌渣中含有豐富的有機物以及少量的赤霉素殘留。赤霉素菌渣對周邊環(huán)境造成了潛在的環(huán)境風險,已經(jīng)成為藥品生產(chǎn)企業(yè)的重要難題。本課題通過對赤霉素菌渣預處理及其可厭氧生化性能進行研究并進一步研究菌渣和餐廚垃圾的混合厭氧消化特性,以期為生產(chǎn)應用提供一定的理論研究基礎和技術(shù)支撐。本研究的主要內(nèi)容及結(jié)論如下:(1)采用堿熱聯(lián)合工藝對菌渣進行預處理,正交實驗設計結(jié)果表明:堿熱預處理能有效地提高菌渣的水解效果,SCOD的溶解率最高可達65.26%,產(chǎn)氣量也得到提高。影響菌渣預處理的主要因素為加堿量、預處理時間和溫度,綜合考慮確定后續(xù)實驗預處理條件為預處理溫度65℃、加堿量6%、預處理時間30 min。(2)在中溫條件下進行不同混合比例的靜態(tài)發(fā)酵試驗。實驗結(jié)果表明:提高餐廚垃圾混合比例,可以有效地提高系統(tǒng)產(chǎn)氣量及有機物去除率,但系統(tǒng)的穩(wěn)定性指標會降低。赤霉素菌渣和餐廚垃圾的混合比2:1時最高產(chǎn)氣率、有機物去除率分別為103.2 mL/d、45.2%,相對于赤霉素菌渣單獨厭氧發(fā)酵分別提高339.14%、34.12%,且系統(tǒng)穩(wěn)定性指標VFA/堿度穩(wěn)定在0.5左右,綜合考慮系統(tǒng)效率和穩(wěn)定性比較確定2:1為最佳混合比例。(3)在35℃、45℃、55℃三個CSTR設備以最佳混合比例2:1分別以1gVS/(L·d)作為啟動負荷進行為期158天厭氧發(fā)酵動態(tài)試驗。實驗結(jié)果表明:35℃、45℃、55℃系統(tǒng)最大可容忍負荷分別為5 gVS/(L·d)、6 gVS/(L·d)、7gVS/(L·d),系統(tǒng)穩(wěn)定期平均最大產(chǎn)氣量分別為670 mL/d、720 mL/d、760 mL/d。高溫系統(tǒng)日產(chǎn)氣量最大,系統(tǒng)穩(wěn)定性較差。中溫35℃系統(tǒng),在可容忍范圍內(nèi),增大有機負荷可以提高系統(tǒng)產(chǎn)氣率,有機物去除率。綜合得出35℃,4 gVS/(L·d),赤霉素菌渣與餐廚垃圾混合比例為2:1為厭氧發(fā)酵性能最佳狀態(tài)。
[Abstract]:As an agricultural antibiotic, gibberellin is widely used in agricultural production because of its plant growth promoting effect. Gibberellin bacteria residue is produced in the process of gibberellin production. Gibberellin residue is rich in organic matter and a small amount of gibberellin residue. Gibberellin residue poses a potential environmental risk to the surrounding environment. Through the pretreatment of gibberellin bacteria residue and its anaerobic biochemical properties of the study and further study of the mixed anaerobic digestion characteristics of bacteria residue and kitchen waste. The main contents and conclusions of this study are as follows: 1. Pretreatment of bacteria residue by alkali heat combined process. The results of orthogonal experiment showed that alkali thermal pretreatment could effectively improve the hydrolysis effect of bacteria residue and the highest solubility of Scod could be up to 65.26%. The main factors affecting the pretreatment of bacteria residue were alkali addition, pretreatment time and temperature. The following experimental pretreatment conditions were determined comprehensively: pretreatment temperature 65 鈩，

本文編號：1453509