Waste Treatment and Recovery最新文献

Treatment of Pharmaceutical Process Wastewater with Hybrid Separation Method: Distillation and Hydrophilic Pervaporation 蒸馏和亲水渗透汽化混合分离法处理制药废水

Waste Treatment and Recovery Pub Date : 2018-08-25 DOI: 10.1515/wtr-2018-0002

A. Tóth, Enikő Haáz, T. Nagy, Ariella Janka Tarjáni, D. Fozer, A. Andre, N. Valentínyi, Szabolcs Solti, P. Mizsey

引用次数: 5

COD reduction of process wastewater with vacuum evaporation 真空蒸发法降低工艺废水COD

Waste Treatment and Recovery Pub Date : 2018-07-26 DOI: 10.1515/wtr-2018-0001

A. Tóth, Enikő Haáz, Botond Szilágyi, T. Nagy, Ariella Janka Tarjáni, D. Fozer, A. Andre, N. Valentínyi, Szabolcs Solti, P. Mizsey

引用次数: 8

Complex whey utilization: the propionic acid alternative 复合乳清利用:丙酸替代品

Waste Treatment and Recovery Pub Date : 2017-12-20 DOI: 10.1515/lwr-2017-0002

Aladár Vidra, A. Tóth, Á. Németh

{"title":"Complex whey utilization: the propionic acid alternative","authors":"Aladár Vidra, A. Tóth, Á. Németh","doi":"10.1515/lwr-2017-0002","DOIUrl":"https://doi.org/10.1515/lwr-2017-0002","url":null,"abstract":"Abstract Whey is the complex waste of the dairy industry. Despite the fact, that it has numerous applications (like different form of food supplements), its major amount is still handled as waste. The carbohydrate, protein and lactic acid content, as well as the COD and BOD, are sufficiently high warranting disposal as waste resulting in high costs; however, their levels are insufficient for the cost-effective isolation and purification. Most of the numerous reports on whey utilisation focus on lactose utilization, while lactic acid removal is complex, but necessary, particularly in case of sour whey decontamination. According to our best knowledge among the microbial fermentation, the only lactic acid (as carbon source) utilization process is propionic acid fermentation. Propionic acid is an attractive product with a wide application range. In this study, two propionic acid producing microorganisms were investigated in terms of industrial applicability. The propionic acid producing bacteria are generally characterized by anaerobic metabolism (except the pathogenic P. acne); but, for application in a biorefinery, facultative anaerobe behavior is the most appropriate and cost-effective. In this study, the aero-tolerances of Propionibacterium freudenreichii subsp. shermanii and Propionibacterium acidipropionici were examined; their propionic acid-producing properties (yield, concentration, substrate preference, productivity) were compared.","PeriodicalId":398965,"journal":{"name":"Waste Treatment and Recovery","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121229586","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}

引用次数: 1

Lactic acid production from cane molasses 从甘蔗糖蜜生产乳酸

Waste Treatment and Recovery Pub Date : 2017-12-20 DOI: 10.1515/lwr-2017-0003

Aladár Vidra, A. Tóth, Á. Németh

引用次数: 24

Whey utilization in a two-stage fermentation process 乳清在两阶段发酵过程中的利用

Waste Treatment and Recovery Pub Date : 2017-12-20 DOI: 10.1515/lwr-2017-0004

Aladár Vidra, Á. Németh

{"title":"Whey utilization in a two-stage fermentation process","authors":"Aladár Vidra, Á. Németh","doi":"10.1515/lwr-2017-0004","DOIUrl":"https://doi.org/10.1515/lwr-2017-0004","url":null,"abstract":"Abstract Whey is a major by-product of the cheese and dairy industry and has valuable nutritional constituents, however poses a major environmental risk if disposed of without prior treatment. The main components of whey except of water are lactose, lactic acid, soluble proteins, lipids, vitamins and mineral salts which give a very high biochemical oxygen demand (BOD) and chemical oxygen demand (COD) load (30,000 - 50,000 ppm and 60.000 - 80,000 ppm, respectively) to the whey. This composition provides adequate nitrogen and carbon source to be utilized by microorganisms. The aim of this study was to examine the whey utilization in a two-stage fermentation process using Lactobacillus species and Propionibacterium acidipropionici. In the first stage Lactobacillus species utilise the main part of the nitrogen source while covert lactose content to lactic acid. In the second stage Propionibacterium acidipropionici utilize lactic acid and produce propionic acid. This two-stage fermentation process can be a feasible option, both for bioremediation of whey and production of propionic acid from waste sources. High lactose conversion (>90%) to lactic acid was achieved at the first stage, but its conversion to propionic acid during the second stage was insufficient (~30%). The COD was successfully decreased during the fermentations.","PeriodicalId":398965,"journal":{"name":"Waste Treatment and Recovery","volume":"457 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116565544","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}

引用次数: 4

Methanogenesis inhibition by phosphorus in anaerobic liquid waste treatment 厌氧废液处理中磷对甲烷生成的抑制作用

Waste Treatment and Recovery Pub Date : 2017-04-01 DOI: 10.1515/lwr-2017-0001

D. C. Mancipe-Jiménez, C. Costa, M. C. Márquez

引用次数: 5

Optimisation of the emulsion liquid membrane composition and demulsification for rhodium extraction 萃取铑的乳状液膜组成及破乳工艺的优化

Waste Treatment and Recovery Pub Date : 2015-09-03 DOI: 10.1515/lwr-2015-0002

F. Moyo, R. Tandlich

{"title":"Optimisation of the emulsion liquid membrane composition and demulsification for rhodium extraction","authors":"F. Moyo, R. Tandlich","doi":"10.1515/lwr-2015-0002","DOIUrl":"https://doi.org/10.1515/lwr-2015-0002","url":null,"abstract":"Abstract: This study was aimed at designing an optimised emulsion liquid membrane (ELM) for the extraction of rhodium from precious metal refinery wastewaters. The demulsification process and the structure of the optimised ELM are reported on. Two optimised ELMs were prepared. The first one contained a 30 % solution of toluene in kerosene as diluent with the following concentrations of the ELM components: 30.000 g/L (w/v) polyisobutylene, 10.870 g/L (m/v) of trioctyl amine and 51.001 g/L (m/v) of SPAN 80. The second ELM contained the same diluent, but the concentrations of the other ELM components in it were as follows: 20.000 g/l of polyisobutylene, 10.268 g/l trioctyl amine and 50.024 g/l of SPAN 80. The stripping phase was the same in both optimised ELMs, namely a 2 M solution of HNO3. The stripping phase and the diluent solution were mixed together in ratios of 1:1 and 2:1, respectively. Two methods were used to characterise the microdroplet diameters, i.e. optical microscopy and the Zeta-sizer. For the t-test, the p-value of 0.3018 at 5 % level of significance showed that there was statistically no significant difference in the mean micro-droplet size for 1:2 ELMs containing 20 g/l and 30 g/l of polyisobutylene after 40 minutes of emulsification. The best demulsification results were obtained using the chemical demulsification with polyethylene glycol with molecular weight of 400 g/mol (PEG 400) at 50 ± 1 °C for 24 hours. However, significant carryover of toluene, trioctyl amine and polyethylene glycol into the aqueous phase was observed.","PeriodicalId":398965,"journal":{"name":"Waste Treatment and Recovery","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122073903","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}

引用次数: 6

Survival of Bifidobacteria and their usefulness in Faecal Source Tracking 双歧杆菌的存活及其在粪便源追踪中的应用

Waste Treatment and Recovery Pub Date : 2015-07-16 DOI: 10.1515/lwr-2015-0001

C. Luyt, S. Khamanga, W. J. Muller, R. Tandlich

引用次数: 3