Linnaeus Eco-Tech最新文献

{"title":"Wastewater and leachate treatment in tartu waste water treatment plant","authors":"H. Terase, Juri Haller","doi":"10.15626/eco-tech.2001.028","DOIUrl":"https://doi.org/10.15626/eco-tech.2001.028","url":null,"abstract":"HistoryLegislationTechnical datasNitrogen removing problemsTartu landfill leachate treatment possibilities","PeriodicalId":321575,"journal":{"name":"Linnaeus Eco-Tech","volume":"07 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131995870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New elements for leakage water treatment in rural areas","authors":"R. Bendere","doi":"10.15626/eco-tech.2001.026","DOIUrl":"https://doi.org/10.15626/eco-tech.2001.026","url":null,"abstract":"","PeriodicalId":321575,"journal":{"name":"Linnaeus Eco-Tech","volume":"639 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116212840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Willow coppice plantations as wastewater treatment systems","authors":"S. Larsson","doi":"10.15626/eco-tech.2001.027","DOIUrl":"https://doi.org/10.15626/eco-tech.2001.027","url":null,"abstract":"Short rotation willow coppice (Salix) can be used as vegetation filter to treat industrialand municipal wastewater. In May 1998 a EU-FAIR project, \"Biomass short rotationwillow coppice fertilized with nutrient from municipal wastewater (BWCW)\" wasstarted to investigate the consequences to establish willow plantations to treatwastewater in some European countries with varying climatic conditions. The aims ofthis research project were to evaluate the positive effects of irrigation of willow-toenergy plantations with wastewater, but also to find the negative consequences and todevelop strategies to deal with them. The project comprises comparable pilot plantationslocated in four different climatic regions in the four European countries: France, Greece,Unite Kingdom and Sweden. In this paper the experiences from this EU research projectBWCW, which will be finished off in 2002, are briefly described.","PeriodicalId":321575,"journal":{"name":"Linnaeus Eco-Tech","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132826038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effectiveness of pollutant removal from municipal wastewater in vertical flow constructed wetlands","authors":"P. Kowalik, M. Mierzejewski, P. Randerson, H. Williams","doi":"10.15626/eco-tech.2001.024","DOIUrl":"https://doi.org/10.15626/eco-tech.2001.024","url":null,"abstract":"The efficiency of pollution removal from municipal sewage in two vertical flow constructedwetlands consisting of gravel filters with surface area 4 x 5 m, depth 60 cm, covered by reedwas evaluated over a period of two years. The flow of wastewater was about 50 mm per day.Wastewater underwent only mechanical treatment before reed bed B, but reed bed A wassupplied with wastewater after biological treatment with activated sludge. Sewage wassampled before and after filtration every IO days. Measurements were made of sewage supplyand discharge, precipitation and wastewater temperatures. The main indicator of efficiencywas the elimination of suspended solids, carbon, nitrogen and phosphorus from thewastewater during filtration. The elimination of the pollution load was 2-25 g per squaremeter per day for the BOD5 and 0--3.5 g per square meter per day for total nitrogen. Rates ofpollution removal were between 2 and 4 times as high in bed Bas in bed A. The rate ofBOD5 removal and the coefficient k for BOD5 were strongly dependent on temperature for reed bedB; less so far for bed A. The difference between summer and winter indicates that the surfacearea of constructed wetland B should be 3 times bigger during winter to obtain the summerrate ofBOD5 pollution removal in the climatic conditions ofNorth Poland (54a° N).","PeriodicalId":321575,"journal":{"name":"Linnaeus Eco-Tech","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115194895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recirculation of nutrients from MSW with a biocell reactor technique","authors":"Toreif Bramryd","doi":"10.15626/eco-tech.2001.025","DOIUrl":"https://doi.org/10.15626/eco-tech.2001.025","url":null,"abstract":"Biological treatment of wastes is an important part of a sustainable waste managementsystem, and can be used for the extraction of nutrients, humus and energy, but also for longterm stabilization or detoxification of wastes. New biological techniques, like some types ofreactor cells, constructed in landfill areas, also function as bio-filters, where nutrients areseparated in a liquid form while heavy metals and other pollutants are fixed in thefermentation residue. Energy is extracted as biogas. Thus not only source separated, nonpolluted organic wastes, but also slightly polluted residual municipal, commercial or lightindustrial wastes can be treated and stabilized with biological techniques.","PeriodicalId":321575,"journal":{"name":"Linnaeus Eco-Tech","volume":"472 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125014601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New elements of water management","authors":"J. Niemczynowicz","doi":"10.15626/eco-tech.2001.021","DOIUrl":"https://doi.org/10.15626/eco-tech.2001.021","url":null,"abstract":"Modern water management goes presently through difficult processes of adaptation to new tatgetsstipulated by the needs of sustainable development. The process of change requires constantwidening of necessary knowledge and activitiy of engineers and scientists dealing with watermanagement. New targets require more itegrated actions, involving also new subject areas that areonly indirectly connected with traditional water management issues. To these belongs, forexample, management of raw materials, products and residuals, problems of soil pollution andresulting chemical contamination of agricultural products, presence of contaminants in food,influencing helth of population. Simultaneously, traditional goals of water management must bealso be fulfilled while costs of maintenance and renovation of oldering water supply and sanitarysystems increase parallel with age of constructions.Sustainable develpment postulates require actions towards preservation and gradual improvementof water quality in local and regional surface- and groundwater reservoirs in all regions,protection of agricultural soils, forests and other ecological systems such as weltands, medows,rivers and lakes that constitute a base for maintaining biological diversity and, simultaneously, forfood production and recreation of population in villages and cities. It may be notted that there is ageneral trend to widen the role of scientists and engineers dealing with water management toadress other, less typical areas, such as management of residuals, protection of rawmaterials andhealth protection of population. New understanding is growing among scientists and populationthat residuals, often classified as Agarbage=, Apollution:or Asolid weaste= may also constitutenew valuable resnources, it may be visualized by following symmetrical equation:Pollution = lost resources = pollutionBeginning with consideration of pollution problems one will arrive to the problem oflost naturalresources. Starting with a problem of inefective use and lost natural resources, one will arrve tothe problem of environmental pollution.","PeriodicalId":321575,"journal":{"name":"Linnaeus Eco-Tech","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131098478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk for increased metal leakage due to ageing of landfills?","authors":"A. Mårtensson, M. Östman, C. Våg, O. Wahlberg, S. Ågren","doi":"10.15626/eco-tech.2001.020","DOIUrl":"https://doi.org/10.15626/eco-tech.2001.020","url":null,"abstract":"As landfill ages, oxygen will start to penetrate, We investigated whether aeration of a landfillaffected metal leaching, We found that aeration increased cation exchange capacity, butdecreased the buffering capacity and the metal-binding capacity. Leachates from an aeratedlandfill contained less than half the amount of aluminium and iron and more than double theamount of calcium, sulphur and zinc than leachates derived from an identical, but anaerobic,landfill. The leachate from the aerated landfill was capable of extracting metals from theoriginal landfill when recirculated. Leachate from the original landfill treated with leachatefrom the aerated landfill contained more than twice as much cadmium, copper, iron, sulphurand zinc than leachate from the identical anerobic landfill. We conclude that precautionsshould be taken considering the fate of deposited metals when extrapolating results derivedfrom studies on landfills at earlier degradation stages to landfills in more progressed phases.","PeriodicalId":321575,"journal":{"name":"Linnaeus Eco-Tech","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125550529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The use of wetland for stormwater pollution control","authors":"M. Rimeika","doi":"10.15626/eco-tech.2001.022","DOIUrl":"https://doi.org/10.15626/eco-tech.2001.022","url":null,"abstract":"Developing and implementing a stonnwater management strategy requires several keycomponents. Research must be undertaken to develop local rainfall distribution statistics,determine stonnwater pollutant loading characteristics, determine the effectiveness of variousstonnwater treatment practices and identify design criteria for each type of the bestmanagement practice. The practice of urban stonnwater management has until recentlyfocused only on drainage and flood control. But now days more and more concern are takento reduce pollution's wash out loads to water recipients by implementing source controlmanagement, on-site treatment and building stonnwater pollution control facilities. In thearticle overview and basic principals of stonnwater quality management are presented.General stonnwater treatment and pollutant removal mechanisms are explained. Swnmaryresults of study of the pollution removal in constructed wetlands for stonnwater treatment aredescribed.","PeriodicalId":321575,"journal":{"name":"Linnaeus Eco-Tech","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121647721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Constructed wetland systems in Poland","authors":"H. Obarska-Pempkowiak, M. Gajewska, P. Kowalik","doi":"10.15626/eco-tech.2001.017","DOIUrl":"https://doi.org/10.15626/eco-tech.2001.017","url":null,"abstract":"Efficiency of removal of contaminants in individual and local constructed wetland systemsoperating in 1995-2000 in Poland was analysed. Individual plants were composed of filterbeds of horizontal subsurface flow planted with willow (Salix viminalis) or reed (Phragmitesaustra/is).The local systems were hybrid constructed wetland systems consisting of horizontal andvertical flow filters. All systems were fed with septic tank effluent.Removal of organic matter and suspended solids was found to be very efficient. However theremoval of nitrogen (especially ammonia nitrogen) in one stage systems was insufficient. Itwas proved that hybrid systems ensure higher efficiencies of nitrogen removal than horizontalflow systems.","PeriodicalId":321575,"journal":{"name":"Linnaeus Eco-Tech","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130067680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reed rootfelt for constructed wetlands","authors":"I. Plume","doi":"10.15626/eco-tech.2001.019","DOIUrl":"https://doi.org/10.15626/eco-tech.2001.019","url":null,"abstract":"The resources of lakes' overgrowth biomass increases in result of eutrofication process inmore than 2000 lakes in Latvia. Usage of lake reed rootfelt for filling of constructed wetlandscan improve leachate treatment at a beginning period of operation and especially applicable intreatment plants with limited area. Physical and chemical properties of Reed rootfelt of lakeZebras were investigated to evaluate possibilities for rootfelt usage in constructed wetlands.The Reed rootfelt coalesces with the ground in coastal zone and is floating in the deeper areasof lake. Thickness of floating reed rootfelt layer varies from 0.25 to 0.8 m. Density (withoutgravitational water) of reed rootfelt varies from 550 kg/ml at a surface to 1058 kg/m' indeeper layers if the rootfelt coalesces with ground. Investigated average density is 505 kg/mland 814 kg/ml for floated overgrowth and rootfelt coalesced with ground respectively. Themoisture content (without gravitational water, dry basis) of freshly removed floated rootfeltchanges from 523 % at a surface to 706 % in deeper layer. If rootfelt was dried and moistenedonce more, moisture content remain practically same at a surface (498 %) and decreases 3times in deeper layer (226 %). Investigated average organic matter content were 77 % forfloating rootfelt and 49 % for rootfelt coalescing with ground. The specific energy of rootfeltcutting is 8,6 kJ/m2 for oscillating saw, 18.1 kJ/m2 for vertical blade and IO kJ/m2 for bladesloped in 45°. Acceptable technology for rootfelt removal includes partitioning of overgrowthin pieces and/or layers by manually operated or powered cutters and floating of pieces ofrootfelt to coastal stockpile. Pre-treatment of rootfelt includes washing out of inorganicsediments, draining of the excess (gravitational) water and drying slightly only, to preservegrowing ability of rootfelt. Thickness of rootfelt pieces can be increased for filling of areaclose to inlets in constructed wetlands to provide additional structure for enchancedflocculation and sedimentation. Methods of rootfelt pieces removal, handling andtransportation avoid destruction of removed biomass and ensure high initial growing ability.","PeriodicalId":321575,"journal":{"name":"Linnaeus Eco-Tech","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130125962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}