浅析不同性质垃圾渗滤液对处理工艺的影响

本文主要针对垃圾渗滤液的水质水量特点，结合福州市红庙岭垃圾综合处理场污水厂处理工艺以及污水厂十几年运行经验，总结出不同性质垃圾渗滤液对处理工艺的影响，探讨垃圾渗滤液处理的新途径     

城市垃圾填埋场渗滤液处理工程技术探讨

城市垃圾填埋场渗滤液是一种成分复杂的高浓度有机废水,垃圾渗滤液若不妥善处理而直接排放,将会对周边环境造成严重污染。本文通过对福建省南平市文田垃圾处理场渗滤液处理站提升改造工程的技术分析,探讨总结了该垃圾渗滤液处理站的处理工艺。     

天井洼垃圾渗滤液处理场调试方案研究

介绍了天井洼垃圾渗滤液处理场设计概况,并对处理场的调试和试运行进行了系统介绍,主要包括调试和试运行的前期准备工作,系统调试方案及过程、协调管理工作等方面。     

轿子山垃圾渗滤液处理场调试方案研究

文章介绍了轿子山垃圾渗滤液处理场设计概况,并对处理场的调试和试运行进行了系统介绍,主要包括调试和试运行的前期准备工作,系统调试方案及过程、协调管理工作等方面。     

MBR-NF工艺处理垃圾渗滤液中试研究

随着渗滤液新的排放标准生活垃圾填埋场污染控制标准(GB 16889-2008)的颁布,渗滤液的处理变得更加严格.为了达到相应排放标准,进行了MBR-NF工艺处理渗滤液的中试研究.研究结果表明,MBR-NF工艺可以有效处理渗滤液,出水COD、氨氮和总氮质量浓度分别低于100、25、40 mg·L-1.其去除效率分别可达98%、99%和95%以上.总氮的处理是整个工艺的关键,必须通过二级反硝化和外加碳源的方式加以去除.纳滤系统对COD处理效果非常有效,但对氨氮和总氮的去除效率较为有限,同时纳滤系统将产生20%的浓缩液,需要进一步处理.     

福州市红庙岭垃圾填埋场渗滤液的处理工艺简介

福州市红庙岭垃圾综合处理场垃圾渗滤液的处理主要采用好氧和厌氧相结合的生物处理法。本文主要介绍该方法的处理效果及存在的问题，并对处理技术的进一步改进提出一些建议。     

高效MBR+膜深度技术处理生活垃圾渗滤液研究

我国目前垃圾综合处理场主要采用堆肥、焚烧、填埋等生产工艺,针对其生成的垃圾渗滤液的水质特性,采用高效膜生物反应器+深度处理作为污水处理系统主要工艺,并对其进行了分析和探讨。     

金华市垃圾填埋场渗滤液处理中心工程设计

金华市垃圾填埋场渗滤液处理中心工程,设计处理规模为250 m³/d,采用“预处理+二级AO+超滤+纳滤+反渗透”组合工艺,出水水质执行《生活垃圾填埋场污染控制标准》(GB 16889—2008)中表2规定的水污染排放浓度限值。本工程于2017年11月投入运营,多年运营期内,系统稳定运行。结合2021年度各处理系统水质情况,结果表明二级AO工艺段对COD_Cr的平均去除率>90%,对氨氮的平均去除率>99%,纳滤膜对超滤产水总氮(TN)的去除率为34.7%～47.1%,反渗透膜对纳滤产水TN的去除率为55.3%～65.9%,各项出水指标均满足设计标准,证明了工艺的可行性和稳定性。文章介绍了金华市垃圾填埋场渗滤液处理中心采用的处理工艺技术,各处理系统和构筑物的组成和设计参数,以及设计层面和运营期间的主要工艺参数的控制,并分析总结了渗滤液处理中心工程设计的特点。     

UASB/SBR/脱氮/Fenton组合工艺处理垃圾渗滤液实例

该文采用UASB/SBR/脱氮/Fenton组合工艺处理垃圾渗滤液。结果表明废水CODCr从1 140 mg/L左右降至100 mg/L以下,去除率达到91%;氨氮从430 mg/L左右降至25 mg/L以下,去除率达到94%。排放水质完全达到《生活垃圾填埋场污染物控制标准》(GB 16889—2008)中规定的排放标准。     

磁性树脂去除垃圾渗滤液生化出水中的COD和UV_(254)

垃圾渗滤液生化出水COD_(Cr)为924.2 mg/L,MIEX~树脂对垃圾渗滤液生化出水最优投加量为1.725 g∶50.0 m L,COD去除率为56.51%,UV_(254)去除率77.44%。pH为8.72时,MIEX~树脂对垃圾渗滤液生化出水COD和UV_(254)的去除率最高。随着电解质的加入,MIEX~树脂对垃圾渗滤液生化出水中COD和UV_(254)的去除率降低。升高温度有利于MIEX~树脂对垃圾渗滤液生化出水中COD和UV_(254)的去除。MIEX~树脂可用2 mol/L Na OH溶液再生。机理研究表明:MIEX~树脂可通过阴离子交换和疏水作用去除垃圾渗滤液生化出水中的COD和UV_(254)。     

Addition of activated carbon to batch activated sludge reactors in the treatment of landfill leachate and domestic wastewater

Leachate from a municipal landfill was combined with domestic wastewater and was treated in batch activated sludge systems. The effectiveness and applicability of the addition of Powdered Activated Carbon (PAC) to activated sludge reactors was investigated. Isotherm tests were carried out with PAC in order to estimate the extent of adsorption of organic matter onto PAC. Then, in activated sludge reactors COD (Chemical Oxygen Demand) removal and nitrification were studied both in the absence and presence of PAC for comparison purposes. In both cases, Oxygen Uptake Rates (OUR) were measured with respect to time in order to investigate substrate removal and change in microbial activity. Addition of PAC to activated sludge increased COD removal by removing mainly the non‐biodegradable fraction in leachate. The COD decreases in batch reactors were best expressed by a first‐order kinetic model that incorporated this non‐biodegradable leachate fraction. With added PAC, nitrification was also enhanced. But in all of the batch runs a significant accumulation of NO₂ ‐N took place, indicating that the second step of nitrification was still inhibited. © 2001 Society of Chemical Industry     

CODCr催化快速测定法与标准方法对比试验

国家标准中重铬酸盐法测定化学需氧量,操作时间长,占用空间大,采用催化快速法测定COD大大缩短了测定时间,同时耗能低,占用空间小。该方法的精密度及准确能达到要求。     

制药工业废水中CODCr与BOD5的相关性及应用研究

建立一种只需测定工业废水中化学需氧量（简称CODcr），就可推算出生化需氧量（BOD5）的方法，对21个样品进行分析测定CODcr和BOD5，经线性回归找出两者的相关性；试验表明CODcr和BOD5间具有良好的线性相关性，其中r=0.9958，该方法应用于制药工业废水的处理和控制，具有简便、适应性好、省时省力等优点。     

基于便携式高光谱成像的BOD实时检测研究

针对现有污水生化需氧量(BOD)测量中存在的问题,本文提出了一种基于高光谱成像技术的污水检测方法.该方法通过对指定水域进行实时高光谱成像,同时提供所检测区域水体图谱两方面的信息,配合相应的识别方法,即可以实现对污水BOD的定性、定量和定位分析,且检测方法快速简洁,为BOD的实时检测提供了一种新的途径.     

接枝二茂铁介体微生物传感器对污水BOD的快速测定

采用接枝二茂铁为介体的微生物传感器测量污水的BOD。将二茂铁(ferrocene,Fc)通过缩合反应接枝到大分子介孔材料SBA-15的表面用作微生物生化反应传递电子的介体,与活性污泥提取的微生物混合,并用聚乙烯醇(PVA)进行固定化,以此制备成微生物敏感膜,并与玻碳电极耦合,构建三电极传感系统,用于快速测量污水水样的BOD。结果表明,传感器的线性范围为2～300 mg/L,连续测量20个样品的精密度为4.2%,能连续工作35 d。并讨论了pH,温度和重金属对传感器响应的影响。通过对实际水样的测试表明,测得的BOD与BOD5的具有良好的相关性。     

Insight into spent caustic treatment: on wet oxidation of thiosulfate to sulfate

Oxidation of thiosulfate to sulfate is often the rate controlling step during wet air oxidation (WAO) of spent caustic from the refinery and petrochemical industry and exhibits high Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD). The kinetics of WAO of thiosulfate was studied in the absence and presence of a heterogeneous copper catalyst. Wet oxidation of thiosulfate to sulfate is a free radical reaction exhibiting an induction period. In non‐catalytic oxidation, almost complete conversion of thiosulfate to sulfate was observed in 12 min at 150 °C and in 8 min at 120 °C in the presence of a heterogeneous copper catalyst at 0.69 MPa oxygen partial pressure. The presence of phenol accelerated thiosulfate oxidation. © 1999 Society of Chemical Industry     

Toxic effect of coloured olive compounds on the anaerobic digestion of olive oil mill effluent in UASB-like reactors

Anaerobic sludge digestion of olive oil mill effluent (OOME) in Upflow Anaerobic Sludge Blanket (UASB) reactors was shown to be unstable as a result of both chemical and biological parameters. The study was complicated by the fact that Chemical Oxygen Demand (COD) was removed by growth and maintenance of active biomass and by adsorption in and on the sludge. Coloured compounds caused an inhibition effect on the anaerobic digestion of the wastewater. This inhibition, shown at low COD concentrations of diluted OOME, was due to accumulation of recalcitrant coloured compounds in the sludge, inducing irreversible inhibition of bacterial growth. Partial decolourization of OOME through resin (Duolite XAD 761) treatment reduced the toxic effect.     

A novel microbial BOD biosensor developed by the immobilization of P. Syringae in micro‐cellular polymers

BACKGROUND: A biochemical oxygen demand (BOD) sensor, based on an immobilized Pseudomonas syringae in highly porous micro‐cellular polymer (MCP) in combination with a dissolved oxygen electrode, has been developed for the analysis of biodegradable organic compounds in aqueous samples. Microorganisms were immobilized in a molded MCP disk and a wastewater sample was injected into the biocomposite disk by a flow injection system. Dissolved oxygen (DO) changes as a measure of soluble BOD was read with a DO probe placed into a flow cell carrying biocatalytically activated disk. RESULTS: Optimal response of the MCP BOD sensor was obtained at pH 6.8 and 25 °C with a typical response time of 3–5 min for a 2 mm thick molded polymeric disk. The sensor showed detection linearity over the range 5–100 mg L^?1 BOD₅ (r² > 0.99) at a flow rate of 0.6 mL min^?1. The repeatability and reproducibility of the sensor response were found to be 3.08% and 7.77%, respectively. BOD values produced with this biosensor for various municipal and industrial wastewaters correlated well with those determined by the conventional 5‐day BOD test. CONCLUSION: This new biosensor was different from present amperometric BOD biosensor configurations in which the biocatalyst (microbial/enzymatic) is placed between cellulose and Teflon membranes installed on a DO probe. The use of a molded MCP disk coniainng microbial activity offers better stability and lifetime for commercial use in environmental monitoring. Copyright © 2008 Society of Chemical Industry     

Studies on internal and external water treatment at a paper and cardboard factory

The treatment of effluent from a paper/board factory that produced 280 tons of cardboard and consumed 1200 m³ of water per day was carried out. Wastewater analysis showed that the mill effluent contained 3000 mg dm^?3 suspended solids, 1400 mg dm^?3 COD (chemical oxygen demand) and 500 mg dm^?3 BOD (biochemical oxygen demand). An internal treatment cycle is suggested that involves recirculation of paper‐machine wastewater (white‐water) and may be accomplished by installing a flotation saveall (fiber recovery) unit. This arrangement reduced fresh water use by about 90%, reduced fiber loss by 80–90%, and increased board production by 13%. An external treatment process for the effluent was assessed by conducting laboratory coagulation tests (alum, ferric chloride, ferrous sulfate, and polyelectrolyte) on the whole mill effluent. Oxidation of the mill effluent using calcium hypochlorite before discharging the effluent to a lagoon offers the benefits of killing the harmful bacteria and reducing the pollution load. Copyright © 2003 Society of Chemical Industry     

一种新型的生化需氧量分析装置

介绍一种新型的生化需氧量分析装置，不但能准确地测定环境水质的生化需氧量值，且测定过程更是一种与实际微生物生化降解过程相似的供氧“呼吸”过程。根据这个过程绘制的反应整个生化过程中每个时刻生化降解情况的曲线，能给环境工作者提供更为直观、详细、可靠、有效的数据。