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A method for treating cassava alcohol wastewater by filling anaerobic reactor with graphite felt material

An anaerobic reactor, cassava alcohol technology, applied in anaerobic digestion treatment, chemical instruments and methods, natural water treatment and other directions, can solve the problems of complex experimental equipment, large pH influence, limited application conditions, etc., and achieve COD removal. High rate, economical cost saving, and the effect of being beneficial to recycling

Active Publication Date: 2018-10-12
NANJING TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The graphite felt catalytic electrode electrochemical system reported by Li Guixia treated oxytetracycline wastewater, the COD removal rate only reached about 50%, and the acidic condition was not conducive to the degradation of the organic matter by the cathode, and the alkaline condition was not conducive to the degradation of the organic matter by the anode. Application conditions limited range
The graphite felt cathodic electro-Fenton method reported by Chu Biwang degrades benzoic acid in water, and the COD removal rate reaches 89.7%.

Method used

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  • A method for treating cassava alcohol wastewater by filling anaerobic reactor with graphite felt material
  • A method for treating cassava alcohol wastewater by filling anaerobic reactor with graphite felt material
  • A method for treating cassava alcohol wastewater by filling anaerobic reactor with graphite felt material

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Embodiment 1

[0038] Weigh 195g of graphite felt and cut it into small pieces according to the size of L×D×H of 20×20×5mm and put them in the support. Measure 1000mL of anaerobic sludge and inoculate it on the graphite felt carrier in the reactor. During the cultivation and domestication stage of the sludge, artificial wastewater is used for cultivation. The formula is sodium acetate 0.25 g / L, sodium propionate 0.25 g / L, butyric acid Sodium 0.25 g / L, urea 0.5 g / L, glucose 0.25 g / L, dipotassium hydrogen phosphate 0.1 g / L, use NaHCO 3 Adjust the influent pH to 7.2. Among them, in order to adapt the sludge to higher COD in subsequent experiments, the glucose concentration was increased from 0.25 g / L to 3.5 g / L, and the COD of the artificial wastewater configured was 1024 mg / L~4596 mg / L, and the organic loading rate (OLR) is 1.46 kg COD / (m 3 d)~10.58 kg COD / (m 3 d), the culture temperature is 35°C, at this stage static culture is used to better immobilize the sludge on the graphite felt ca...

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Abstract

The invention discloses a method using a graphite felt material to fill an anaerobic reactor to treat cassava alcohol wastewater. The method includes: filling the graphite felt material in the anaerobic reactor to serve as a sludge carrier, wherein volume of the graphite felt material accounts for 30-45% of working volume of the reactor; inoculating anaerobic sludge on the graphite felt carrier, and standing for culture to enable the anaerobic sludge to be adsorbed on the graphite felt carrier; performing load improving domestication culture on the anaerobic sludge, leading the cassava alcohol wastewater which is diluted step by step into the reactor for backflow, enabling fixed sludge to fully contact with the cassava alcohol wastewater, and finishing domestication when COD removal rate and methane yield are stable; enabling the cassava alcohol wastewater to be treated to flow into the anaerobic reactor for treatment, wherein hydraulic retention time is 0.3-0.5 h. The COD removal rate can reach higher than 95%, running period is short, occupied space is small, and economic cost can be saved.

Description

technical field [0001] The invention relates to a method for treating cassava alcohol wastewater, in particular to a method for treating cassava alcohol wastewater by filling an anaerobic reactor with a graphite felt material. Background technique [0002] Cassava has the characteristics of large yield, high starch content, drought tolerance, barren tolerance, labor-saving planting, and low investment. The production of alcohol with cassava as raw material has a relatively broad market in my country, and 1 / 3 of my country's alcohol production is based on cassava as raw material. In the conventional production process, about 7-15 tons of waste water is produced for every 1 ton of cassava alcohol produced, and this type of waste water contains a large amount of organic compounds and suspended solids, which is an acidic high-concentration organic waste water. In recent years, the state has paid more and more attention to the treatment of alcohol waste liquid that seriously pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F103/32
CPCC02F3/28C02F2103/325C02F2305/06Y02E50/30
Inventor 贾红华雍晓雨陈非儿韩周周华姜岷韦萍
Owner NANJING TECH UNIV
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