摘要:
文章介紹了顆粒污泥結(jié)合厭氧反應(yīng)器處理蛋白加工廢水的工程實(shí)例,考察了反應(yīng)器的啟動(dòng)條件及穩(wěn)定運(yùn)行時(shí)的最佳處理?xiàng)l件。通過反應(yīng)器運(yùn)行期間COD_(Cr)、氨氮、SS的變化情況評價(jià)反應(yīng)器的處理效能。結(jié)果表明,該反應(yīng)器在水力停留時(shí)間(HRT)為5 d、容積負(fù)荷為1.5-3.0 kg COD_(Cr)/(m^(3)·d)時(shí),在20 d內(nèi)即使pH值很低(2-4),也可成功啟動(dòng)。在穩(wěn)定運(yùn)行期間最佳運(yùn)行條件為:容積負(fù)荷保持在10.0 kg COD_(Cr)/(m^(3)·d),HRT為3 d。反應(yīng)器對COD_(Cr)的去除率穩(wěn)定在80%以上,對SS的去除率穩(wěn)定在35%左右,運(yùn)行過程中會(huì)將有機(jī)氮轉(zhuǎn)化為氨氮導(dǎo)致出水氨氮濃度增加。綜合來看,該厭氧反應(yīng)器結(jié)合厭氧污泥顆粒能夠?qū)Υ祟惖蚿H、高濃度的蛋白加工廢水進(jìn)行很好的預(yù)處理,啟動(dòng)簡單,效能穩(wěn)定,具有良好的應(yīng)用前景。
摘要:
采用PVA生物處理工藝對印染-生活混合廢水進(jìn)行處理,研究PVA工藝處理該廢水的可行性.試驗(yàn)結(jié)果表明:經(jīng)過45 d運(yùn)行,PVA工藝容積負(fù)荷提高至3.0 kg [CODcr]/(m3·d),廢水CODcr降低至120 mg/L以下,NH3-N降低至3 mg/L以下,色度降低至30倍以下.運(yùn)行期間污泥產(chǎn)率僅為0.02 MLSS/CODremoved,系統(tǒng)基本無污泥外排.SEM研究發(fā)現(xiàn)PVA凝膠小球表面和內(nèi)部的微生物通過自我氧化抑制污泥產(chǎn)量是此工藝具有良好污泥減量效果的根本原因.%PVA biological process was used to treat dyeing and living mixed wastewater, and the feasibility of PVA process for treating the dyeing and living mixed wastewater was studied. Experimental results showed that after running for 45 d, PVA process volume load increased to 3.0 kg [CODcr]/(m3·d), effluent CODcr reduced to less than 120 mg/L, NH3- N reduced to less than 3 mg/L, the chromaticity reduced to less than 30 times. The sludge yield was only 0.02 MLSS/CODremoved,basically without sludge discharge. Microscope (SEM) research showed that the self oxidation of abundant microorganisms gathering at surface and inside of the PVA ball inhibited sludge production, which was the root cause of sludge reduction in the process.
摘要:
采用半干法厭氧生物反應(yīng)器對分類后生活垃圾預(yù)處理產(chǎn)生的高濃度固體廢棄物有機(jī)滲濾液進(jìn)行厭氧消化處理,結(jié)果表明:通過接種厭氧微生物,可實(shí)現(xiàn)半干法厭氧反應(yīng)器的快速啟動(dòng).厭氧反應(yīng)器pH值維持在7.4左右,ORP維持在-459mV,無酸化現(xiàn)象.隨著反應(yīng)器容積負(fù)荷提高,可能產(chǎn)生游離氨氮抑制,游離氨質(zhì)量濃度宜控制在28~73 mg/L.半干法厭氧反應(yīng)器最大容積負(fù)荷為13.44 g VS/(L·d),反應(yīng)器底部殘?jiān)枰ㄆ谂懦?防止厭氧反應(yīng)器堵塞.