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常州污泥干化焚烧项目技术应用 预览
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作者 郑凯 《净水技术》 CAS 2019年第A01期163-166,共4页
近年来市政污水污泥处理处置越来越受到重视,污泥干化焚烧工艺作为最终处置路线之一,在国内开始尝试工程应用。文中介绍了核心技术引进日本的污泥搅拌筒直接干化+回旋焚烧炉工艺技术路线在常州污泥干化焚烧项目的应用;这也是该工艺国内... 近年来市政污水污泥处理处置越来越受到重视,污泥干化焚烧工艺作为最终处置路线之一,在国内开始尝试工程应用。文中介绍了核心技术引进日本的污泥搅拌筒直接干化+回旋焚烧炉工艺技术路线在常州污泥干化焚烧项目的应用;这也是该工艺国内首个应用案例。 展开更多
关键词 污泥 污泥处理处置 污泥干化焚烧
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污泥智能多段回转高温好氧发酵技术应用案例 预览
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作者 吕树梅 《净水技术》 CAS 2019年第8期99-105,共7页
污泥智能多段回转高温好氧发酵技术是在传统堆肥技术的基础上,将有机物与污泥按照一定比例搅拌混合后,在封闭设备内经强制通风供氧进行好氧发酵。该技术研制出的多段回转发酵舱可满足不同微生物的生长需求;舱体从进料口向出料口设置一... 污泥智能多段回转高温好氧发酵技术是在传统堆肥技术的基础上,将有机物与污泥按照一定比例搅拌混合后,在封闭设备内经强制通风供氧进行好氧发酵。该技术研制出的多段回转发酵舱可满足不同微生物的生长需求;舱体从进料口向出料口设置一定的倾角,物料从进口进入后做螺旋式回转运动,具有发酵周期短、发酵完全、无臭味、节省土地资源等优点。文中以内蒙古自治区赤峰市阿鲁科尔沁旗天山镇污水处理厂日处理污泥20 t项目为例,应用智能多段回转高温好氧发酵技术,从物料储存、计量、输送、混合、发酵、筛分等环节进行全程监控,实现全自动化控制。成品污泥含水率为30%,虫卵死亡率>95%,有机物含量达到69%,污泥处理取得了良好的效果。 展开更多
关键词 污泥 污泥处理 污泥智能多段回转高温好氧发酵技术 多段回转发酵舱
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The key role of inoculated sludge in fast start-up of sequencing batch reactor for the domestication of aerobic granular sludge
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作者 Xiao-chun Wang Zhong-lin Chen +3 位作者 Jing Kang Xia Zhao Ji-min Shen Liu Yang 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第4期127-136,共10页
Two types of inoculated sludges, granular sludge that had been stored at-20°C and activated sludge, were investigated for the domestication of aerobic granular sludges(AGSs in sequencing batch reactors(SBRs). The... Two types of inoculated sludges, granular sludge that had been stored at-20°C and activated sludge, were investigated for the domestication of aerobic granular sludges(AGSs in sequencing batch reactors(SBRs). The results showed that using the stored granular sludge as inoculation sludge could effectively shorten the domestication time of AGS and yielded mature granular sludge after 22 days of operation. The AGS domesticated by stored granular sludge had better biomass and sedimentation properties;its MLSS and SVI reached8.55 g/L and 35.27 mL/g, respectively. The removal efficiencies for chemical oxygen demand(COD), ammonium nitrogen(NH4+-N) and total phosphorus(TP) reached 90.76%, 97.39% and 96.40%, respectively. By contrast, 54 days were needed to obtain mature granules using activated sludge. The microbial community structure was probed by using scanning electron microscopy(SEM) and high-throughput sequencing. The results showed that the diversity of the microbial community in mature granules was reduced when stored granular sludge rather than activated sludge was employed as inoculation sludge, and the dominant microbes were changed. The dominant species in mature granules domesticated using stored granular sludge were Zoogloea, Acidovorax and Tolumonas at the genus classification level, while the dominant species were Zoogloea and TM7-genera in granules developed from activated sludge. 展开更多
关键词 AEROBIC GRANULAR SLUDGE Microbial community Sequencing batch reactor Stored GRANULAR SLUDGE
Upgrading VFAs bioproduction from waste activated sludge via co-fermentation with soy sauce residue
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作者 Yanqing Duan Aijuan Zhou +4 位作者 Kaili Wen Zhihong Liu Wenzong Liu Aijie Wang Xiuping Yue 《中国环境科学与工程前沿:英文版》 SCIE EI CAS CSCD 2019年第1期53-62,共10页
Conditioning of extra carbon sources has been widely reported to facilitate fermentation of waste activated sludge (WAS). Soy sauce residue (SSR) was a relatively untapped carbon source for sludge conditioning. This b... Conditioning of extra carbon sources has been widely reported to facilitate fermentation of waste activated sludge (WAS). Soy sauce residue (SSR) was a relatively untapped carbon source for sludge conditioning. This batch study aimed to evaluate the possible implementation of SSR for volatile fatty acids (VFAs) production from WAS. To upgrade the bioavailability of feedstock, three typical pretreatment methods were conducted, i.e., ammonium hydroxide (AH), sulfuric acids (SA) and thermal assisted alkaline (TA). AH pretreated test (AH-PT) outperformed due to a relatively strong structure decomposition of cellulosic materials as revealed by infrared spectroscopic analysis and crystal index. As a result, performed a high hydrolysis rate of 4449 mg COD/d, 1.12-1.23-fold higher than that in TA and SA pretreated tests (TA-PT and SA-PT), and 7.8-fold higher than that in the Control test. Meanwhile, a volatile fatty acids (VFAs) contribution of 401.2 mg COD/g SSR L and a maximum acidification rate of 3.59 d was recorded, with a high sum proportion of mall molecular acetic and propionic 82.2%, 11%-70% increase over the other three tests. Besides, speciation process characterized with functional genus differentiation was identified by microbial diversity and distribution investigation and canonical correspondence analysis (CCA). Finally, a potential market value of 0.49-0.65 Billion €/year was preliminary estimated, showing promise of resource recovery from both WAS and SSR instead of extensive disposal. 展开更多
关键词 Waste activated SLUDGE (WAS) SOY SAUCE residue (SSR) SLUDGE conditioning VOLATILE fatty acids (VFAs) Microbial diversity
Research Progress on Resource Utilization of Municipal Sludge 预览
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作者 Hu Yanyan Xu Fuyin +1 位作者 Chen Xiang Bao Bing 《气象与环境研究:英文版》 CAS 2019年第2期64-66,共3页
The production of municipal sludge is huge,and the sludge contains a large quantity of organic matter and nutrient elements. In this study,the development status of sludge compost at home and abroad was briefly descri... The production of municipal sludge is huge,and the sludge contains a large quantity of organic matter and nutrient elements. In this study,the development status of sludge compost at home and abroad was briefly described,and the environmental risk of land use of sludge compost was summarized. Meanwhile,the utilization direction of sludge compost was proposed. The use of sludge compost in urban green soil and forestry soil is one of effective ways to solve the problem of municipal sludge. It also provides ideas for the disposal of domestic sludge. 展开更多
关键词 MUNICIPAL SLUDGE SLUDGE COMPOST RESOURCE UTILIZATION Research PROGRESS
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唐山污泥处理项目群与污泥农用实践 预览
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作者 王涛 《中国环保产业》 2019年第4期38-41,共4页
唐山西郊污水处理厂污泥堆肥工程是中国第一座市政污泥堆肥工程,其与之后陆续建造的唐山西郊污水处理二厂污泥堆肥工程和唐山市城市污泥无害化处置工程,形成了目前我国唯一完全采用国产技术的污泥堆肥项目群,代表了各个时期我国的污泥... 唐山西郊污水处理厂污泥堆肥工程是中国第一座市政污泥堆肥工程,其与之后陆续建造的唐山西郊污水处理二厂污泥堆肥工程和唐山市城市污泥无害化处置工程,形成了目前我国唯一完全采用国产技术的污泥堆肥项目群,代表了各个时期我国的污泥堆肥发展水平,为行业纵向对比研究提供了范例。文章介绍了上述项目的背景、概况和技术特点,并对主要技术数据进行了对比分析;介绍了污泥有机肥农地实验应用情况及跟踪监测数据;指出该项目群对我国污泥堆肥事业的重要贡献。 展开更多
关键词 污泥堆肥 污水处理厂 土地利用 农用
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A strategy for enhancing anaerobic digestion of waste activated sludge: Driving anodic oxidation by adding nitrate into microbial electrolysis cell
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作者 Hong Peng Zhiqiang Zhao +3 位作者 Hong Xiao Yafei Yang Huimin Zhao Yaobin Zhang 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第7期34-42,共9页
Cathodic reduction of CO2 and anodic oxidation of organic matters are crucial to methaneproducing microbial electrolysis cell(MEC) applied in anaerobic digestion of waste activated sludge. However, cathodic CO2 reduct... Cathodic reduction of CO2 and anodic oxidation of organic matters are crucial to methaneproducing microbial electrolysis cell(MEC) applied in anaerobic digestion of waste activated sludge. However, cathodic CO2 reduction is usually restrained by slow metabolism rates of H2-utilizing methanogens and low electron-capturing capacity of CO2, which consequently slows down the anodic oxidation that participates to sludge disintegration. Herein, a strategy with adding nitrate as electron acceptor to foster electronic transfer between the anode and cathode was proposed to improve anodic oxidation. Results showed that the average efficiency of anodic oxidation in the nitrate-added MEC increased by 55.9%. Accordingly,volatile suspended solid removal efficiency in the nitrate-added MEC was 21.9% higher than that of control MEC. Although the initial cumulative methane production in the nitrateadded MEC was lower than that of control MEC, the cumulative methane production in 24 days was 8.9% higher. Fourier transform infrared spectroscopy analysis indicated that anodic oxidation of MEC with nitrate accelerated the disintegration of sludge flocs and cell walls. Calculation on current signal further revealed that anodic oxidation driven by cathodic nitrate reduction was the main mechanism responsible for the improved sludge digestion. 展开更多
关键词 Waste ACTIVATED SLUDGE MICROBIAL ELECTROLYSIS cell NITRATE Anodic oxidation SLUDGE reduction
不同调理方法强化污水厂污泥脱水性能的对比 被引量:1
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作者 陈静涵 何岩 +2 位作者 乔赵超 黄民生 盛宸 《环境工程》 CAS CSCD 北大核心 2019年第2期84-89,共6页
以上海某生活污水厂浓缩污泥为研究对象,以泥饼含水率和毛细吸水时间(CST)为评价指标,系统对比研究了芬顿(Fenton)、超声波-聚合硫酸铁(PFS)、十二烷基磺酸钠(SDS)-氢氧化钠(NaOH)、溶菌酶和蛋白酶K共5种污泥调理方法对污泥脱水性能的... 以上海某生活污水厂浓缩污泥为研究对象,以泥饼含水率和毛细吸水时间(CST)为评价指标,系统对比研究了芬顿(Fenton)、超声波-聚合硫酸铁(PFS)、十二烷基磺酸钠(SDS)-氢氧化钠(NaOH)、溶菌酶和蛋白酶K共5种污泥调理方法对污泥脱水性能的强化效果。研究结果表明:5种调理方式中Fenton调理的脱水效果最好,调理后污泥泥饼含水率和CST分别为64.8%、43.3 s,但其产生的强酸性废水和污泥可能会影响后续的处理处置;技术经济综合分析发现,超声波-PFS联合调理是相对最优的污泥调理方式,超声波作用时间为30 s,PFS投加量为15.0 mg/g时,污泥的泥饼含水率可达到70.51%;蛋白酶K的调理效果明显优于溶菌酶;然而,研究发现SDS-NaOH联合调理会导致污泥脱水性能恶化。 展开更多
关键词 污水处理厂 污泥 脱水性能 污泥调理方法
城市污水处理厂剩余污泥处置的资源化利用效果研究 预览
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作者 黄申斌 《环境科学与管理》 CAS 2019年第10期87-91,共5页
城市污水处理厂剩余污泥处置的资源化利用过程效果分析比较繁琐,传统分析过程比较片面缺乏综合性,因此提出城市污水处理厂剩余污泥处置的资源化利用效果分析。构建剩余污泥资源利用效果分析模型,使用模型对剩余污泥厌氧水解酸化效果进... 城市污水处理厂剩余污泥处置的资源化利用过程效果分析比较繁琐,传统分析过程比较片面缺乏综合性,因此提出城市污水处理厂剩余污泥处置的资源化利用效果分析。构建剩余污泥资源利用效果分析模型,使用模型对剩余污泥厌氧水解酸化效果进行判定,并对定性指标赋值以及利用化定性指标赋值进行评价,以此实现剩余污泥资源化利用效果分析。以传统方法为对照组设计对比实现,分别针对ASSD值以及生物吸纳程度进行实验。 展开更多
关键词 污水 处理厂 污泥处置 资源化 利用效果
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Distribution and removal of antibiotic resistance genes during anaerobic sludge digestion with alkaline, thermal hydrolysis and ultrasonic pretreatments
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作者 Mengli Wang Ruying Li Qing Zhao 《环境科学与工程前沿(英文)》 SCIE EI CAS CSCD 2019年第3期163-172,共10页
Sewage sludge in the wastewater treatment plants contains considerable amount of antibiotic resistance genes (ARGs). A few studies have reported that anaerobic digestion (AD) could successfully remove some ARGs from s... Sewage sludge in the wastewater treatment plants contains considerable amount of antibiotic resistance genes (ARGs). A few studies have reported that anaerobic digestion (AD) could successfully remove some ARGs from sewage sludge, but information on the fate of ARGs in sludge pretreatment-AD process is still very limited. In this study, three sludge pretreatment methods, including alkaline, thermal hydrolysis and ultrasonic pretreatments, were compared to investigate the distribution and removal of ARGs in the sludge pretreatment-AD process. Results showed that the ARGs removal efficiency of AD itself was approximately 50.77%, and if these three sludge pretreatments were applied, the total ARGs removal efficiency of the whole pretreatment-AD process could be improved up to 52.50%-75.07%. The ultrasonic pretreatment was more efficient than alkaline and thermal hydrolysis pretreatments. Although thermal hydrolysis reduced ARGs obviously, the total ARGs rebounded considerably after inoculation and were only removed slightly in the subsequent AD process. Furthermore, it was found that the total ARGs concentration significantly correlated with the amount of 16S rRNA gene during the pretreatment and AD processes, and the bacteria carrying ARGs could be mainly affiliated with Proteobacteria. 展开更多
关键词 TETRACYCLINE RESISTANCE GENES SULFONAMIDE RESISTANCE GENES 16S rRNA gene SLUDGE pretreatment ANAEROBIC SLUDGE digestion
硝酸铁对不同类型污泥自热高温微好氧消化的强化效果
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作者 金宁奔 冯凯丽 +3 位作者 邰俊 张瑞娜 陈善平 朱南文 《环境工程》 CAS CSCD 北大核心 2019年第2期79-83,113共6页
在污泥自热高温微好氧消化(ATMAD)工艺耦合硝酸铁去酸抑制作用过程中,研究了进料不同配比的初沉池污泥和二沉池污泥对硝酸铁强化污泥消化效果的影响。结果表明:硝酸铁对二沉池污泥的强化效果优于初沉池污泥,进料污泥中二沉池污泥比例越... 在污泥自热高温微好氧消化(ATMAD)工艺耦合硝酸铁去酸抑制作用过程中,研究了进料不同配比的初沉池污泥和二沉池污泥对硝酸铁强化污泥消化效果的影响。结果表明:硝酸铁对二沉池污泥的强化效果优于初沉池污泥,进料污泥中二沉池污泥比例越高,消化效果越好。进料污泥中二沉池污泥比例越高,硝酸铁对污泥上清液中VFA、SCOD和氮磷等去除的强化效果也越强,但消化污泥的脱水性能越差,消化污泥CST值随之增长的幅度也越小。 展开更多
关键词 自热高温微好氧消化 污泥 硝酸铁 污泥类型 脱水性能
铜系催化剂对市政污泥热解特性的影响
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作者 刘雯雯 郑永杰 +2 位作者 田景芝 荆涛 秦海洋 《现代化工》 CAS CSCD 北大核心 2019年第7期133-137,139共6页
利用催化热解技术提取污泥中的有机质,考察了热解温度、热解时间以及金属盐催化剂和CuO/剩余污泥复合催化剂对有机质产率的影响,同时对污泥热解产物的成分进行检测。结果表明,3种铜盐及CuO/剩余污泥复合催化剂均能使污泥热解温度降低,4... 利用催化热解技术提取污泥中的有机质,考察了热解温度、热解时间以及金属盐催化剂和CuO/剩余污泥复合催化剂对有机质产率的影响,同时对污泥热解产物的成分进行检测。结果表明,3种铜盐及CuO/剩余污泥复合催化剂均能使污泥热解温度降低,4种催化剂的催化作用大小依次为:CuO/剩余污泥复合催化剂>CuCO3>Cu(NO3)2>CuCl2。CuO/剩余污泥复合催化剂质量分数为2%时,产油率为27.72%。CuO/剩余污泥复合催化剂扫描电镜图和XPS测定结果显示污泥灰份表面不光滑,其形貌呈不规则孔道结构,表面载有不规则的CuO,偶有团聚现象,而且颗粒与颗粒之间存在不规则的空隙,该形貌结构特点为热解过程提供了有效的传质空间,有效增加了催化剂活性。 展开更多
关键词 剩余污泥 复合催化剂 低温热解 有机质产率
Performance and microbial community analysis of an algal-activated sludge symbiotic system: Effect of activated sludge concentration
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作者 Li Sun Wei Zuo +4 位作者 Yu Tian Jun Zhang Jia Liu Ni Sun Jianzheng Li 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第2期121-132,共12页
It was focused on the effect of different sludge concentrations on the performances of an algal-activated sludge symbiotic system in terms of wastewater treatment, algal-activated sludge characteristics and community ... It was focused on the effect of different sludge concentrations on the performances of an algal-activated sludge symbiotic system in terms of wastewater treatment, algal-activated sludge characteristics and community structure. The results showed that the highest nutrient removal efficiencies were obtained in the reactor R2 with soluble chemical oxygen demand (sCOD), ammonia nitrogen (NH4^+-N) and phosphate (PO4^3- -P) removal efficiencies of (90.6±2.3)%, (97.69±2.6)% and (83.81±2.3)%, respectively. Further investigation exhibited that sludge concentration has a great effect on the dissolved oxygen (DO) concentration, the pH, the growth of algae and the extracellular polymeric substance (EPS) production, which resulted in influencing the settleability and the performance of symbiotic system. The denaturing gradient gel electrophoresis (DGGE) analysis demonstrated that the sludge concentration had a selective power for particular members of algae. Meantime, the stimulated algal population would selectively excite the members of bacteria benefited for the formation of algal-bacterial consortia. The variation of microbial compositions, which was influenced by the different sludge concentrations, might be ultimately responsible for the different treatment performances. 展开更多
关键词 Algal-activated SLUDGE SYMBIOTIC system SLUDGE concentration Wastewater treatment ALGAL and BACTERIAL COMMUNITIES
Assessment of Cadmium and Lead in Dried Sewage Sludge from Lubigi Feacal Sludge and Wastewater Treatment Plant in Uganda 预览
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作者 Juliet Kyayesimira Abbey Ssemaganda +1 位作者 Godfrey Muhwezi Morgan Andama 《水资源与保护(英文)》 2019年第6期690-699,共10页
Sludge contains organic and inorganic compounds including traces of heavy metals such as lead (Pb), cadmium (Cd), copper (Cu), nickel (Ni), chromium (Cr) and others. These metals restrict the use of sludge in agricult... Sludge contains organic and inorganic compounds including traces of heavy metals such as lead (Pb), cadmium (Cd), copper (Cu), nickel (Ni), chromium (Cr) and others. These metals restrict the use of sludge in agriculture because their accumulation is harmful to the environment and particularly the food chain. Cadmium and lead are among the most common heavy metals found in municipal wastewater treatment plant sludge. They are capable of bioaccumulation in plant tissues like roots and leaves and are non-biodegradable and therefore they remain in the sludge which is disposed on land or used as fertilizers on farms. The presence of heavy metal pollutants serves as a great threat to soils and also makes plants grown on such soils unfit for animal and human consumption as they may have detrimental effects to animal and human life. For instance, Pb and Cd are known to be human carcinogens. This study therefore aimed to investigate the levels of Cd and Pb in the treated dry sludge from Lubigi Feacal Sludge and Wastewater treatment plant located in Kawempe division, Kampala city, Uganda so as to ascertain its safety for use on agricultural lands. Two batches of samples were collected and analyzed at Government Analytical laboratory in Wandegeya, Uganda. The acid digested sludge samples were analyzed using Atomic Absorption Spectroscopy (AAS) method. The average concentrations of Pb found in collected sludge samples, batch 1 (11.912 mg/kg dm) and batch 2 (5.304 mg/kg dm) were far below the Environment Protection Agency (EPA) maximum permissible concentration (840 mg/kg) for any land application. Cadmium was not detected in all the sludge samples collected;there is an implication that it is either completely absent in the sludge generated by the plant or present but far below detectable levels. The sludge generated from Lubigi fecal sludge and wastewater treatment plant is therefore safe for application on agricultural lands as far as Pb and Cd concentrations are concerned. 展开更多
关键词 LEAD CADMIUM SLUDGE WASTEWATER Treatment Uganda
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粉煤灰和城镇污水处理厂污泥单组分地聚物合成及耐酸性试验 预览
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作者 胡跃芬 黄灿克 《化学工程师》 CAS 2019年第7期39-42,共4页
从工业废弃物或副产品中开发地聚合物生态材料取代普通硅酸盐水泥混凝土,创建了一种低温室气体排放量可持续发展的地聚物生产方法。基于安全性方面考虑,传统地聚物限制了其产品的工业大规模应用。在此背景下,从粉煤灰和城镇生活污水处... 从工业废弃物或副产品中开发地聚合物生态材料取代普通硅酸盐水泥混凝土,创建了一种低温室气体排放量可持续发展的地聚物生产方法。基于安全性方面考虑,传统地聚物限制了其产品的工业大规模应用。在此背景下,从粉煤灰和城镇生活污水处理厂排放的污泥中提取了一种新型的单组分地聚合物。借助于傅利叶红外光谱(FTIR)、扫描电镜(SEM)和X射线衍射仪(XRD)等分析仪器,考察了原料向地聚物的转化过程。耐酸试验表明,该粘结剂具有良好的耐酸蚀性能。在5%H2SO4溶液中浸泡28d,样品重量几乎不改变。与在水中固化的对照样进行了比较,强酸浸泡对粉煤灰和水处理污泥组成的单组分地聚物体系的质量和强度没有明显影响。拓宽了煤粉灰和污水处理厂污泥在地聚物合成中的潜在应用范围。 展开更多
关键词 粉煤灰 污水处理厂 污泥 地聚物 表征
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Hydrolysis and acidification of activated sludge from a petroleum refinery
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作者 Jiahao Liang Chunmao Chen +4 位作者 Brandon A. Yoza Ying Liang Jin Li Ming Ke Qinghong Wang 《石油科学:英文版》 SCIE CAS CSCD 2019年第2期428-438,共11页
The cost-effective treatment of activated sludge that is generated by refining petroleum is a challenging industrial problem.In this study, semi-continuous stirred tank reactors(CSTRs) containing petroleum refinery ex... The cost-effective treatment of activated sludge that is generated by refining petroleum is a challenging industrial problem.In this study, semi-continuous stirred tank reactors(CSTRs) containing petroleum refinery excess activated sludge(PREAS)were used to comparatively investigate hydrolysis and acidification rates, after the addition of heneicosane(C21H44)(R1)and 1-phenylnaphthalene(C16 H12)(R2) to different and individual reactors. Operation of the reactors using a sludge retention time(SRT) of 6 days and a pH of 5.0, resulted in the maintenance of stable biological activity as determined by soluble chemical oxygen demand(SCOD), volatile fatty acids(VFAs) production and oil removal efficiency. The optimum conditions for hydrogen production include a SRT of 8 days, at pH 6.5. Under these conditions, hydrogen production rates in the control containing only PREAS were 1567 mL/L(R0), compared with 1365 mL/L in Rl and 1454 mL/L-PREAS in R2.Coprothermobacter, Fervidobacterium, Caldisericum and Tepidiphilus were the dominant bacterial genera that have the potential to degrade petroleum compounds and generate VFAs. This study has shown that high concentrations of heneicosane and 1-phenylnaphthalene did not inhibit the hydrolytic acidification of PREAS. 展开更多
关键词 Hydrolysis ACIDIFICATION Petroleum REFINERY EXCESS activated sludge (PREAS) VFA PRODUCTION Hydrogen PRODUCTION Microbial community
污泥-生活垃圾混合填埋体抗剪强度特性研究 预览
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作者 王佩 周文渊 +1 位作者 闫坤 廖丹 《人民长江》 北大核心 2019年第7期169-173,共5页
污泥送入生活垃圾填埋场进行混合填埋是国内外常用的处置途径之一。混合填埋体强度参数对填埋场稳定性有重要影响,为此在实验室开展了不同击实功、不同污泥添加量以及不同生化降解时间条件下污泥-生活垃圾混合试样的强度试验,对其强度... 污泥送入生活垃圾填埋场进行混合填埋是国内外常用的处置途径之一。混合填埋体强度参数对填埋场稳定性有重要影响,为此在实验室开展了不同击实功、不同污泥添加量以及不同生化降解时间条件下污泥-生活垃圾混合试样的强度试验,对其强度特性进行研究。结果表明:①随着击实功的增加,混合试样的抗剪强度整体上逐渐增大,当其密度超过1050kg/m^3时,混合试样的内摩擦角和凝聚力增加不明显甚至有减小现象,其抗剪强度增加幅度很小甚至减小。②随着污泥添加量的增加,混合试样的内摩擦角逐渐减小,凝聚力逐渐增加,但是当污泥添加量超过40%时,其凝聚力反而减小。③随着生化降解的进行,混合试样抗剪强度整体趋势在增加,凝聚力和内摩擦角的整体趋势也在增加。 展开更多
关键词 污泥 生活垃圾 垃圾填埋 抗剪强度 生活垃圾降解
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罐头加工厂加压水箱和供水管路的清洗工艺化学清洗现场事例7 预览
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作者 伊藤日出生 《中国洗涤用品工业》 2019年第7期69-72,共4页
本文介绍了罐头加工厂的加压水箱和供水管路的清洗事件。由于准确认定了造成罐头食品污染的元凶,因而,采取过氧化氢清洗剂缓慢清洗的方法,有效去除了给水系统内的污染物,为食品加工提供了一个良好的生产环境。
关键词 加压水箱 供水管路 淤泥 过氧化氢清洗剂
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基于连续式热态实验平台的污泥湿式氧化实验
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作者 杨欢 陈阳 +4 位作者 覃小刚 王焕 文路 房慧 孙登科 《动力工程学报》 CAS CSCD 北大核心 2019年第7期576-584,共9页
为了验证污泥湿式氧化技术的工业可行性、稳定性和安全性,通过建立连续式热态实验台研究典型条件下的污泥湿式处理效果,分别检测了氧化产物中的三相成分和性质并进行反应动力学计算。结果表明:典型条件下实验装置稳定运行超过100 h,反... 为了验证污泥湿式氧化技术的工业可行性、稳定性和安全性,通过建立连续式热态实验台研究典型条件下的污泥湿式处理效果,分别检测了氧化产物中的三相成分和性质并进行反应动力学计算。结果表明:典型条件下实验装置稳定运行超过100 h,反应后固相残渣有机物降解率达78.62%,重金属含量及浸出重金属含量均达标;液相中COD、总氮、氨氮和总磷超标,可返回污水处理厂进一步处理;气相中无SO2和NOx;污泥湿式氧化过程分为快速反应阶段和慢速反应阶段,且2个阶段均属于化学动力学控制。 展开更多
关键词 污泥 湿式氧化 降解 反应动力学
污泥基生物质炭的制备及其对水中铜的吸附研究 预览
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作者 郭家骏 魏东宁 +3 位作者 郑永昕 黄刘辉 江诚毅 黄红丽 《湖南农业科学》 2019年第5期30-33,共4页
以城市污泥为原料,采用热解法制备生物质炭,以水体中Cu2+为吸附目标,探究了活化剂浓度、浸渍比、浸渍时间、炭化温度及炭化时间对污泥基生物质炭制备的影响,并对最佳条件下制备的污泥基生物质炭进行了吸附等温线及吸附动力学分析。结果... 以城市污泥为原料,采用热解法制备生物质炭,以水体中Cu2+为吸附目标,探究了活化剂浓度、浸渍比、浸渍时间、炭化温度及炭化时间对污泥基生物质炭制备的影响,并对最佳条件下制备的污泥基生物质炭进行了吸附等温线及吸附动力学分析。结果表明:污泥基生物质炭的最佳制备条件是活化剂浓度为15%,浸渍比为1∶1,浸渍时间为4 h,炭化温度为750℃,炭化时间为40 min。吸附过程符合准二级反应动力学模型,等温吸附曲线遵循Freundlich等温线模型,说明污泥基生物质炭对Cu2+的吸附为多层吸附。 展开更多
关键词 污泥 生物质炭 重金属 吸附动力学 吸附等温线
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