opravdanost i iskustva
Mario Panjicko (Author), Gregor Drago Zupančič (Author), Gordana Šelo (Author), Mladen Franjo (Author)

Abstract

U radu je prikazana opravdanost primjene anaerobne obrade otpadnih voda iz prehrambene industrije na primjeru pivarske i mljekarske industrije. Otpadne vode prehrambene industrije većinom se ispuštaju u javni kanalizacijski sustav ili obrađuju aerobnim biološkim metodama. Porastom cijena energije i popularizacijom obnovljivih izvora, sve se više razmatra anaerobna obrada otpadnih voda prehrambene industrije, obzirom na visok sadržaj organskih tvari u njima. Te vode u pravilu imaju visoko organsko opterećenje (vrijednosti kemijske potrošnje kisika (KPK) otpadne vode pivarske industrije se kreću od 2500-4000 mg/L, a mljekarske industrije od 1500-3000 mg/L), koje je primjenom anaerobne obrade moguće sniziti do 90 %. Tako obrađene vode su, prema KPK vrijednostima, sličnije komunalnim otpadnim vodama te stoga i prihvatljivije za ispuštanje u javni kanalizacijski sustav. Uz snižavanje vrijednosti KPK, anaerobnom obradom proizvodi se bioplin, čijim je iskorištavanjem moguće supstituirati do 20 % prirodnog plina koji se koristi u proizvodnom procesu. Također, otpadnoj vodi moguće je dodavati i drugi tekući otpad (npr. kvasac, sirutka, proizvodi s isteklim rokom trajanja), koji može dodatno povećati proizvodnju bioplina do 60 %, bez negativnih posljedica na provedbu procesa. Uzimajući u obzir snižavanje pristojbi na otpadne vode i smanjenje potrošnje prirodnog plina, period povrata investicije u ovakve sustave iznosi od 3 do 5 godina što njihovu primjenu čini ekonomski opravdanom.

Keywords

anaerobna digestija;bioplin;energetska oporaba;otpadna voda;

Data

Language: Croatian
Year of publishing:
Typology: 1.08 - Published Scientific Conference Contribution
Organization: UNG - University of Nova Gorica
UDC: 628.1
COBISS: 4564475 Link will open in a new window
Views: 4734
Downloads: 0
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary title: Anaerobic treatment of industrial waste water from food and beverage industry
Secondary abstract: In this paper the feasibility of anaerobic treatment of wastewater from brewery and dairy industry is presented. In most cases such wastewaters are discharged into the public sewer system or treated by aerobic biological methods. With increasing energy prices and popularization of renewable energy sources, the anaerobic treatment is increasingly being considered due to wastewaters high organic matter content. These wastewaters generally have high organic load (COD values between 2,500-4,000 mg/L and 1,500-3,000 mg/L for brewery and dairy wastewater respectively), which can be reduced up to 90% with the application of anaerobic treatment. According to COD values the treated wastewater are more similar to the municipal wastewater and are more suitable for discharge in the public sewer system. In addition to COD reduction, biogas produced during anaerobic treatment can substitute up to 20% of natural gas in the production process. Moreover, other liquid waste (e.g. yeast, whey and spoiled liquid products) can be added to the wastewater, which can further increase the biogas production up to 60%, without adverse effects to the anaerobic process. Considering the reduction in environmental taxation and natural gas use the payback period of such systems is 3 to 5 years, which makes such application feasible.
Secondary keywords: anaerobic digestion;biogas;energy recovery;wastewater;
URN: URN:SI:UNG
Type (COBISS): Not categorized
Pages: Str. 206-219
ID: 9222690