硅藻土顆粒在處理煤氣廢水活性污泥系統(tǒng)中的作用(英文)

【摘要】：Diatomite is a kind of natural low-cost mineral material.It has a number of unique physical properties and has been widely used as an adsorbent in wastewater treatment.This study was conducted to investigate the aerobic biodegradation of coal gasification wastewater with and without diatomite addition.Experimental results indicated that diatomite added in the activated sludge system could promote the biomass and also enhance the performance of the sludge settling.The average mixed-liquor volatile suspended solids(MLVSS) is increased from 4055 mg·L-1 to 4518 mg·L-1 and the average settling volume(SV) are changed only from 45.9% to 47.1%.Diatomite additive could enhance the efficiency of chemical oxygen demand(COD) and total phenols removal from the wastewater.The COD removal increased from 73.3% to near 80% and the total phenols removal increased from 81.4% to 85.8%.The mechanisms of the increase of biomass and pollutants removal may correlates to the improvement of bioavailability and sludge settlement characteristics by diatomite added.Micrograph of the sludge in the diatomite-activated sludge system indicated that the diatomite added could be the carrier of the microbe and also affect the biomass and pollutant removal. 【作者單位】： School
【關(guān)鍵詞】： diatomite phenols coal gasification wastewater activated sludge
【基金】：Supported by the Shanghai Committee of Education (07ZZ158)
【分類號(hào)】：X784
【正文快照】： 1 INTRODUCTION Coal gasification wastewater is generated in coal gas purification. The composition of this kind of wastewater is very complex and varies from one fac-tory to another. Phenols are primarily and constitute 60% to 80% of the organic content

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