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蚯蚓生物滤池处理剩余污泥时填料是影响污泥减量化效果的关键因素之一。为进一步提高蚯蚓生物滤池工艺的效能,在有机负荷为1.30和1.73 kgVSS/(m3·d)条件下比较了瓷球、拉西环、陶粒三种不同填料的蚯蚓生物滤池处理剩余污泥的减量化及稳定化效果,并从滤池持泥量变化以及蚯蚓的生理生态适应性探讨了三种填料的优缺点。结果表明,以拉西环为填料的蚯蚓生物滤池运行最为稳定高效,VSS减量率平均为56%,满足《城镇污水处理厂污染物排放标准》(GB 18918—2002)中污泥有机物降解率40%的要求;其微生物的附着和对污泥的截留确保蚯蚓的食料充足,通过显微镜观察蚯蚓切片发现,拉西环对蚯蚓体壁的损伤较小,且拉西环较大的空隙率为蚯蚓与微生物的生长繁殖提供了连通性好、透气性强的环境条件,有利于发挥蚯蚓与微生物的协同降解作用。 相似文献
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《中国给水排水》2016,(3)
蚯蚓生物滤池基于蚯蚓与微生物的协同作用,可有效实现剩余污泥的减量化和稳定化,其中由于蚯蚓的摄食、咀嚼和消化等作用及蚓粪的团聚作用可有效改善污泥的脱水性能。在有机负荷为2.43 kg VSS/(m~3·d)的条件下,结合持泥量变化情况,比较了木珠、鲍尔环、瓷球三种不同填料的蚯蚓生物滤池处理剩余污泥的减量化和稳定化效果,并选取运行最稳定高效的木珠填料生物滤池进行脱水性能试验。以污泥比阻、毛细吸水时间、Zeta电位、污泥颗粒粒径、絮体结构、EPS为指标,考察了处理前后污泥脱水性能的变化。结果表明,经蚯蚓生物滤池处理后的污泥比阻和毛细吸水时间减少,Zeta电位升高,污泥颗粒粒径增大,絮体结构更为紧密,脱水性能大大改善。最后结合蚯蚓与微生物的相互作用关系,分析了蚯蚓生物滤池改善污泥脱水性能的机制。 相似文献
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石英砂和陶粒蚯蚓生物滤池的污泥减量化效果比较 总被引:2,自引:0,他引:2
比较了石英砂和陶粒滤料蚯蚓生物滤池的污泥减量化效果.结果表明,当水力负荷为2.4~6.7 m3/(m2·d)时两种滤池均可实现污泥的减量化和稳定化.陶粒蚯蚓生物滤池的污泥减量率和VSS减量率分别达到了40.5%-48.2%和52.9%~65.6%,其污泥减量化和稳定化效果均优于石英砂蚯蚓生物滤池.蚯蚓生物滤池处理污泥的过程也是蚯蚓在滤料中活动生长的过程,滤料为蚯蚓提供的生长环境直接影响滤池对污泥处理效果的优劣.扫描电镜分析表明,在陶粒滤料中蚯蚓体壁的角质层、表皮层及环肌层所受到的损伤程度都要比在石英砂中的小.对蚯蚓超氧化物歧化酶(SOD)活性的测定结果显示:在各工况下,生长在陶粒滤层中蚯蚓的SOD活性均显著低于石英砂滤层中蚯蚓的SOD活性.因此陶粒的物化性质更能满足蚯蚓生长活动的需要,使蚯蚓发挥更大功效. 相似文献
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蚯蚓生物滤池的化学除磷可行性研究 总被引:2,自引:1,他引:1
摘要:通过比较未投加聚合氯化铝(PAC)和投加PAC进行化学除磷的两组蚯蚓生物滤池在不同温度条件下的处理效果和蚯蚓适应性,考察了投加PAC进行化学除磷的可行性。结果表明:投加PAC后蚯蚓生物滤池对TP的去除效果显著提高,出水COD降低,氨氮增加,而TN基本没有变化;投加PAC后产生的化学污泥是导致SS减量率和VSS减量率降低的主要原因,但出泥的VSS/SS与未投加PAC的非常接近;污泥的稳定化程度仍较高;投加PAC对蚯蚓有一定的毒害作用,导致生物量和摄食消化能力有所下降,但随着时间的延长,蚯蚓抵御PAC胁迫的能力增强;虽然滤池具有一定的保温效果,但低温仍然较大程度地影响了蚯蚓生物滤池的处理效果,故蚯蚓生物滤池宜建在温暖地区或对其采取适当的保温措施。 相似文献
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改进型蚯蚓生态滤池处理生活污水研究 总被引:7,自引:2,他引:7
蚯蚓生态滤池是一种利用微生物、蚯蚓和基质等组成的人工生态系统处理生活污水的绿色新技术.以土壤、砂、碎青石、鹅卵石为滤料,在水力负荷为0.53 m3/(m2·d)、蚯蚓负荷为4.63 g蚯蚓/L土壤、湿干比为1:5的条件下,进行了单级蚯蚓生态滤池处理生活污水的研究.结果表明,该滤池处理效果良好,进水COD、NH+4-N及TP负荷与相应的去除负荷之间均呈较好的线性关系;在稳定运行阶段,对COD的去除率为72.92%~93.33%,对NH+4-N的去除率为72.66%~99.03%,对TP的去除率为59.79%~96.49%.该技术具有工艺简单、处理效果好、操作方便、无剩余污泥产生等优点. 相似文献
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有机磷农药废水处理工程 总被引:1,自引:0,他引:1
有机磷农药废水的舍盐量、氨氮、有机物浓度均很高,且具有生物毒性,属于难处理废水.嘉化集团的有机磷废水处理工程中,乙酰废水通过预处理回收醋酸钠,异稻瘟净废水和胺化废水通过预处理回收氨水.中试研究表明有机磷综合废水采用生物处理是可行的.有机磷废水(300 m3)与热电厂膜反冲水(2 700 m3)混合后CI-浓度为9 000 mg,/L,COD为2 100 mg/L,经过水解/缺氧/好氧处理后COD为450 mg/L,氨氮为34.2 ms/L,出水水质达到<污水综合排放标准>(GB 8978-1996)的三级标准. 相似文献
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A novel process termed as bioevaporation was established to completely evaporate wastewater by metabolic heat released from the aerobic microbial degradation of the organic matters contained in the highly concentrated organic wastewater itself. By adding the glucose solution and ground food waste (FW) into the biodried sludge bed, the activity of the microorganisms in the biodried sludge was stimulated and the water in the glucose solution and FW was evaporated. As the biodegradable volatile solids (BVS) concentration in wastewater increased, more heat was produced and the water removal ratio increased. When the volatile solids (VS) concentrations of both glucose and ground FW were 120 g L−1, 101.7% and 104.3% of the added water was removed, respectively, by completely consuming the glucose and FW BVS. Therefore, the complete removal of water and biodegradable organic contents was achieved simultaneously in the bioevaporation process, which accomplished zero-discharge treatment of highly concentrated organic wastewater. 相似文献
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在对某油田采油废水水质进行监测的基础上,开展了利用复合工程菌B350降解采油废水中有机物的试验研究,并与活性污泥的降解结果进行了对比。经12h的降解,B350对TOC的去除率为75.3%,而对比的活性污泥仅为55.5%;4h为必要的反应时间。用Monod反应动力学方程进行拟合计算,B350和活性污泥的降解平衡常数Ks、最大基质比去除速度vmax、难降解TOC含量、反应级数b、反应系数a分别为:5.22mg/L与3.53mg/L,14.83h^-1与7.71h^-1,8.43mg/L与16.15mg/L.0.48与0.48,4.59与3.98。B350处理采油废水的反应程度和速度均优于活性污泥;活性污泥与B350的反应级数相同,说明在低有机物浓度范围内反应速度受浓度的影响较小。 相似文献
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IC反应器在抗生素废水处理中的调试运行研究 总被引:1,自引:0,他引:1
抗生素废水是一种难降解的高浓度有机废水,传统的厌氧工艺通常对其处理效率不高.将新型高效的厌氧反应器--IC反应器用于处理抗生素废水,并通过接种颗粒污泥、控制进水浓度和水量、调控pH值和温度等一系列措施后成功启动了该反应器.两年多的实际运行效果表明:采用IC反应器处理抗生素废水,不仅处理效率高而且运行稳定,对COD的平均去除率可达到78%,大大减轻了后续好氧和气浮工艺的处理负荷,确保了整个废水处理系统出水的达标排放. 相似文献
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Earthworm-microorganism interactions: A strategy to stabilize domestic wastewater sludge 总被引:4,自引:0,他引:4
Limin Zhao Jian Yang Meiyan Xing Xiaowei Li Danghao Yi Dehan Deng 《Water research》2010,44(8):2572-2582
The performance of a conventional biofilter (BF) and a vermifilter containing the earthworm, Eisenia foetida, (VF) for the treatment of domestic wastewater sludge were compared with the earthworm-microorganism interaction mechanisms involved in sludge stabilization. The results revealed that the presence of earthworms in the VF led to significant stabilization of the sludge by enhancing the reduction in volatile suspended solids (VSS) by 25.1%. Digestion by earthworms and the earthworm-microorganism interactions were responsible for 54% and 46% of this increase, respectively. Specifically, earthworms in the VF were capable of transforming insoluble organic materials to a soluble form and then selectively digesting the sludge particles of 10-200 μm to finer particles of 0-2 μm, which led to the further degradation of organic materials by the microorganisms in the reactor. Additionally, denaturing gradient gel electrophoresis (DGGE) profiles showed that there was an intensified bacterial diversity in the vermifilter due to the presence of earthworms, especially in response to the nutrients in their casts. 相似文献
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Excessive water consumption in pulp and paper industry results in high amount of wastewater. Pollutant characteristics of the wastewater vary depending on the processes used in production and the quality of paper produced. However, in general, high organic material and suspended solid contents are considered as major pollutants of pulp and paper industry effluents. The major pollutant characteristics of pulp and paper industry effluents in Turkey were surveyed and means of major pollutant concentrations, which were grouped in three different pollution grades (low, moderate and high strength effluents), and flow rates within 3000 to 10,000 m3/day range with 1000 m3/day steps were used as design parameters. Ninety-six treatment plants were designed using twelve flow schemes which were combinations of physical treatment, chemical treatment, aerobic and anaerobic biological processes. Detailed comparative cost analysis which includes investment, operation, maintenance and rehabilitation costs was prepared to determine optimum treatment processes for each pollution grade. The most economic and technically optimal treatment processes were found as extended aeration activated sludge process for low strength effluents, extended aeration activated sludge process or UASB followed by an aeration basin for medium strength effluents, and UASB followed by an aeration basin or UASB followed by the conventional activated sludge process for high strength effluents. 相似文献