Essays about: "alkaline dehydration"

Showing result 1 - 5 of 6 essays containing the words alkaline dehydration.

  1. 1. Sustainability assessment of urine concentration technologies

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Matilda Gunnarsson; [2021]
    Keywords : Wastewater treatment; urine concentration; alkaline dehydration; nitrification-distillation; ion-exchange; struvite precipitation; MCA; Avloppsvattenrening; urinkoncentrering; alkalisk urintorkning; nitrifikations-destillering; jonbyte; struvitfällning; MKA;

    Abstract : The majority of the nutrients in household wastewater are found in the urine and in order to facilitate the use the nutrients in the urine as fertilizer, the urine can be can be concentrated. To extract the nutrients from the urine, various technologies for urine concentration are being developed today. READ MORE

  3. 2. Fertiliser derived from human urine : novel media for alkaline urine dehydration

    University essay from SLU/Dept. of Energy and Technology

    Author : Christopher Friedrich; [2021]
    Keywords : nutrient recovery; fertiliser; urine drying; source separation; magnesium oxide; calcium hydroxide;

    Abstract : Every year, each human excretes approximately 4 kg of nitrogen, 1 kg of potassium and 0.3 kg of phosphorus through their urine. In conventional wastewater treatment, these nutrients are usually not recovered for agricultural production, although they can enhance plant growth. READ MORE

  4. 3. Kalkning på alkalina jordar : utan stallgödsel med sockerbetor i växtföljden

    University essay from SLU/Dept. of People and Society

    Author : Jacob Larsson; [2018]
    Keywords : kalk; alkalina jordar; strukturkalk; kalkstensmjöl; lönsamhet; fältförsök;

    Abstract : Fram till och med kampanjen 2016 så fanns det en reglerad marknad på odling av sockerbetor, men nu har man släppt på denna reglering vilket har bidragit till ett överskott på socker i världen. Detta har gjort att ekonomin i sockerbetsodlingar har sjunkit drastiskt de senaste åren. READ MORE

  5. 4. Inactivation of the urease enzyme by heat and alkaline pH treatment : retaining urea-nitrogen in urine for fertilizer use

    University essay from SLU/Dept. of Energy and Technology

    Author : Magdalena Geinzer; [2017]
    Keywords : fertilizer; nutrient recycling; source separated urine; urea; urease; urine drying;

    Abstract : Urine, containing nitrogen (N) in the valuable form of urea, has a high fertilizer potential if it is dehydrated and the nutrients are concentrated. However, urea is not only a valuable N source for plants but also for microbiota which possess a highly efficient urease enzyme to degrade urea into volatile ammonia (NH3). READ MORE

  6. 5. Developing Formaldehyde Free Flame Retardant for Cellulose

    University essay from Högskolan i Borås/Institutionen Textilhögskolan

    Author : MD.Abdul Hannan; [2011]
    Keywords : cotton cellulose; organophosphorus flame retardant; acetal linkage; low temperature pyrolysis; THC; HRR; char residue; LOI;

    Abstract : Two organophosphorus compounds, namely diethyloxymethyl-9-oxa-10- phosphaphenanthrene-10-oxide (DOPAC) and diethyl (2,2-diethoxyethyl) phosphonate (DPAC) were applied on cotton cellulose to impart non-carcinogenic and durable (in alkaline washing) flame retardant property to it. Some acidic catalysts, sodium dihydrogen phosphate (NaH2PO4), ammonium dihydrogen phosphate (NH4H2PO4) and phosphoric acid (H3PO4), were successfully used to settle acetal linkage between cellulose and flame retardant (FR) compound. READ MORE