本文選題：豬場(chǎng)廢水　切入點(diǎn)：生化處理　出處：《農(nóng)業(yè)環(huán)境科學(xué)學(xué)報(bào)》2017年05期 　論文類型：期刊論文

【摘要】：通過連續(xù)4個(gè)多月現(xiàn)場(chǎng)采樣測(cè)定并分析湖南某水沖糞豬場(chǎng)典型廢水處理工藝各階段水質(zhì),包括p H、懸浮固體(SS)、化學(xué)需氧量(COD)、氨氮(NH_3-N)、總氮(TN)和總磷(TP)的變化情況,探究規(guī)�；i場(chǎng)廢水常規(guī)生化處理的實(shí)際效果,并分析存在的問題與可能的原因。結(jié)果表明,豬場(chǎng)常規(guī)固液分離后廢水SS、COD、NH_3-N、TN、TP含量依然較高,分別為3040~4900、6440~11 290、652.3~1044、721.3~1187、55.5~148.1 mg·L~(-1),厭氧消化大部分去除的是廢水中可溶性有機(jī)物,COD去除較少,進(jìn)入后續(xù)生化處理負(fù)荷高。常規(guī)二級(jí)生化處理后二沉池出水水質(zhì)指標(biāo)中NH_3-N為37.9~108.7 mg·L~(-1),TN為179.1~203.4 mg·L~(-1),TP為20.1~41.6 mg·L~(-1),不能穩(wěn)定達(dá)標(biāo);后接CASS工藝進(jìn)一步處理后,NH_3-N濃度可大幅降低到0.54~3.2 mg·L~(-1),但TN和TP去除率低,表明該階段以硝化反應(yīng)為主,而反硝化脫氮過程受阻。CASS池出水TP濃度超標(biāo)且色度較深,通過增加化學(xué)混凝沉淀工藝脫色、除磷,最終出水達(dá)標(biāo),但由此產(chǎn)生大量化學(xué)污泥并消耗化學(xué)藥劑,延長(zhǎng)了工藝路線,處理成本高達(dá)近10元·t-1。豬場(chǎng)糞污傳統(tǒng)固液分離-厭氧產(chǎn)沼-多級(jí)生化處理工藝水質(zhì)達(dá)標(biāo)困難的主要原因在于進(jìn)入水處理系統(tǒng)的依附于SS中的"惰性"COD、氮和磷濃度較高,妨礙了其降解或轉(zhuǎn)化。因此,改進(jìn)并研發(fā)在前端快速高效去除SS和"惰性"污染物再進(jìn)行生化處理的工藝,是有效提高處理效果、縮短處理周期和降低處理成本的可行途徑。
[Abstract]:The changes of water quality in various stages of typical wastewater treatment process of a water flushing pig farm in Hunan Province for more than 4 months were determined and analyzed, including pH, SS, COD, NH _ 3-N, TNN and TP _ (TP). The practical effect of conventional biochemical treatment of wastewater from large-scale pig farm was investigated, and the existing problems and possible reasons were analyzed. The results showed that the content of NH3-NTNTTP in wastewater was still high after conventional solid-liquid separation. The results showed that the removal rate of COD in the wastewater was less than that in anaerobic digestion, which was 3040,4900N 644000N 11 290N 652.3C104U 721.387U 55.5N 148.1 mg 路L ~ (-1) mg 路L ~ (-1), and most of the removal of COD in wastewater by anaerobic digestion was less than that by anaerobic digestion. The effluent water quality index of secondary sedimentation tank after conventional secondary biochemical treatment was high. The NH_3-N of secondary sedimentation tank was 37.9 ~ 108.7 mg 路L ~ (-1) 路L ~ (-1) N ~ (TN) was 179.1g 路L ~ (-1) mg 路L ~ (-1) mg 路L ~ (-1) and TP was 20.1N ~ 41.6 mg 路L ~ (-1) ~ (-1), which could not reach the standard stably. After further treatment with CASS process, the concentration of NH _ 3-N decreased significantly to 0.54 ~ (3. 2) mg 路L ~ (-1) 路L ~ (-1), but the removal rates of TN and TP were low, which indicated that nitrification was the main process in this stage, while the denitrification process was blocked. The effluent TP concentration of Cass was higher than the standard and the chroma was deeper. By adding chemical coagulation and precipitation process to decolorize and remove phosphorus, the final effluent reaches the standard, but a large amount of chemical sludge is produced and chemical agents are consumed, thus prolonging the process route. The main reason why the traditional solid-liquid separation, anaerobic production marsh and multistage biochemical treatment process is difficult to reach the standard of water quality is that the inert COD, which is attached to SS, and the higher concentration of nitrogen and phosphorus, which are attached to the water treatment system, are the main reasons for the difficulty in reaching the standard of water quality in the traditional solid-liquid separation, anaerobic production marsh and multistage biochemical treatment process. Therefore, it is a feasible way to improve the treatment effect, shorten the treatment period and reduce the treatment cost by improving and developing the rapid and efficient removal process of SS and "inert" pollutants in the front end.
【作者單位】： 南京農(nóng)業(yè)大學(xué)資源與環(huán)境科學(xué)學(xué)院環(huán)境工程系;南京貝克特環(huán)保科技有限公司;
【基金】：國家自然科學(xué)基金項(xiàng)目(21637003)~~
【分類號(hào)】：X713

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