Start-up of anaerobic reactors for slaughterhouse wastewater treatment

Abstract

This study aimed to evaluate the start-up of a horizontal anaerobic fixed bed reactor (HAFBR) followed by an upflow anaerobic sludge blanket (UASB) for the slaughterhouse wastewater treatment. HAFBR was filled with bamboo rings and had 1.2 m in length, 0.10 m in diameter and volume of 7.5 L. The UASB had the volume of 15 L. The HAFBR and UASB operated at organic loading rate and hydraulic retention time average of 8.46 and 3.77 kg m -3 d -1 of COD and 0.53 and 0.98 days, respectively. During 150 days of monitoring system it was found pH 6.8, relatively high values of bicarbonate alkalinity (> 1000 mg L -1 ) and reduced values of volatile acids (70 to 150 mg L -1 ), which afforded average removal efficiencies of COD total and total suspended solids of the order of 31 and 23% in HAFBR and 79% and 63% in UASB. It can be concluded that the generation and consumption of bicarbonate alkalinity and total volatile acids, thereby maintaining the pH during the study indicated stable operation of the reactors. The COD removal in the reactors was satisfactory especially when it considers that the assessment was conducted in a period of adaptation of organisms to the effluent and also the high organic load applied during this period.KEYWORDS: UASB, anaerobic filter, slaughterhouse, organic matter. , o que proporcionou eficiências médias de remoção de DQO total e sólidos suspensos da ordem de 31 e 23% no RAHLF e de 79 e 63% no UASB. Pode-se concluir que a geração de alcalinidade bicarbonato e consumo de ácidos voláteis totais e consequente manutenção do pH durante o estudo indicaram operação estável dos reatores. A remoção de DQO nos reatores foi satisfatória, principalmente quando se considera que a avaliação foi realizada em per íodo de adaptação dos microrganismos ao efluente e também à elevada carga orgânica aplicada durante este período. PARTIDA DE REATORES ANAERÓBIOS PARA TRATAMENTO DE EFLUENTES PALAVRAS-CHAVE:UASB, filtro anaeróbio, matadouro, matéria orgânica.

Study on Brazilian agribusiness wastewaters: composition, physical‑chemical characterization, volumetric production and resource recovery

“…SHWs are generally composed of blood, manure and viscera and contain a high proportion of proteins and lipids, thus having a high amount of biodegradable organic matter (Fia et al, 2015). Furthermore, SHWs have a high concentration of pathogenic and non-pathogenic microorganisms and can promote ecotoxicity at acute and chronic levels, which makes the treatment of this effluent indispensable before it is disposed of in water bodies (Pereira et al, 2016).…”

Simultaneous Organic Matter and Nitrogen Removal from Piggery Slaughterhouse Wastewater Using Bioaugmented Gaslift Membrane Bioreactor

“…[2] Blood contains high levels of protein, nitrogen, and organic matter. [3] Biological technologies have been widely performed for the treatment of organicrich wastewater such as anaerobic baffled reactor, [4] horizontal anaerobic fixedbed reactor, [5] anaerobic fixed-bed reactor, [6] anaerobic sequencing batch reactor, [7] selector tank, [8] moving bed bioreactor, [9] and aerobic granular sludge. [10] However, high chemical oxygen demand (COD) and total nitrogen (TN) in the PSW may affect the removal performance of anaerobicaerobic systems.…”