Sökning: "retention basin"

Visar resultat 1 - 5 av 13 uppsatser innehållade orden retention basin.

1. 1. Identifying factors that correlate with Enhanced Biological Phosphorus Removal upsets at Lundåkraverket

   Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

   Författare :Rounak Niranjan; [2021]
   Nyckelord :Enhanced biological phosphorus removal; polyphosphate accumulating organisms; glycogen accumulating organisms; sludge content in aeration basin; nitrates in aeration basin; pH of incoming water; principal component analysis; pairwise correlations; inhibition factors;

   Sammanfattning : The Enhanced Biological Phosphorus Removal (EBPR) process is characterized as the most sustainable process to remove phosphorus from wastewater albeit with high variability in performance efficiency. Thus, unpredictable upsets in the EBPR system is the norm across several wastewater treatment plants throughout Sweden, forcing the hand of the operators to dose higher volume of chemicals to reach the effluent requirements. LÄS MER

3. 2. Skumproblematik i avloppsreningen vid Holmen Bravikens pappersbruk : Orsak och lösningsförslag

   Master-uppsats,

   Författare :Isabelle Björklund; [2021]
   Nyckelord :massa- och pappersbruk; slamsvällning; COD:N:P; Extracellulära polymera ämnen; LSP; PCA; vedkomponenter;

   Sammanfattning : The treatment of industrial wastewater is an important measure to prohibit eutrophication and intoxication of lakes and oceans. Major industries often have location-basedwastewater treatment and to avoid undesired effluents it is essential to make it robust. LÄS MER

4. 3. Styrning av biologisk kväverening anpassat efter tidsvarierande elpris

   Uppsats för yrkesexamina på avancerad nivå,

   Författare :Johan Sund; [2019]
   Nyckelord :biological nutrient removal; optimization; aeration; retention basin; equalization; demand response; biologisk kväverening; optimering; luftning; magasin; utjämning; efterfrågerespons;

   Sammanfattning : The electricity demand of a waste water treatment plants follows the diurnal pattern of society, and this generally leads to higher demand when the market price is high. The possibility to adapt the operation after price variation has been known since long, but few studies have been published. LÄS MER

5. 4. Påverkan på kantzoner i Fylleåns avrinningsområde efter föryngrings-avverkning och återbeskogning

   Kandidat-uppsats, Lunds universitet/Examensarbeten i biologi

   Författare :Percy Adolfsson; [2017]
   Nyckelord :Biology and Life Sciences;

   Sammanfattning : Riparian buffer zones have become an established concept in the forestry industry, meant to preserve species richness, stabilize the shoreline, and prevent leakage of nutrients and sediments to forest streams and lakes. It is a common perception in the Swedish Forest Agency in Halland that the handling of buffer zones in the forestry industry is insufficient to protect the freshwater streams and lakes in the forest. LÄS MER

7. 5. A hydrochemical investigation and socioeconomic assessment in Rio Zapomeca river basin focusing on arsenic contamination

   Master-uppsats, Lunds universitet/Avdelningen för Riskhantering och Samhällssäkerhet; Lunds universitet/Riskhantering (CI)

   Författare :Axel Hagström; Anton Rydstedt; [2015]
   Nyckelord :geology; groundwater; drinking water; water contamination; water treatment; value of statistical life; cost-benefit-analysis; Resistivity; Arsenic; Risk; Technology and Engineering;

   Sammanfattning : The awareness of problems concerning arsenic contaminated drinking water sources has during recent years increased. WHO (World Health Organization) decided in 1993 to lower the recommended limit of arsenic in drinking water from 50 μg/l to 10 μg/l, mainly due to observations of its carcinogenicity. LÄS MER