Ecotype coprocessing technique for country sewage and organic solid castoff

A technology for organic solids and rural sewage, applied in biological water/sewage treatment, biological organic part treatment, biological sludge treatment, etc., can solve problems such as breeding mosquitoes and flies, affecting landscape effects, destroying soil structure and ecological balance, and achieving The effect of increasing ventilation and improving economy

Inactive Publication Date: 2008-07-09
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The incineration of organic solid waste not only wastes resources in vain, but also causes air pollution during the incineration process, which significantly increases the prevalence of people, especially those suffering from respiratory diseases.
At the same time, when straw is burned in farmland, it will also destroy the soil structure and ecological balance, resulting in a decline in soil quality.
The open-air stacking of organic solid waste will breed mosquitoes and flies in summer, increasing the chance of disease transmission and affecting the overall rural landscape

Method used

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  • Ecotype coprocessing technique for country sewage and organic solid castoff

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Experimental program
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Effect test

Embodiment 1

[0020] The supernatant of the septic tank and various sewage discharged from the kitchen and laundry are collected by the pipeline and discharged into the regulating tank for adjustment and mixing. Chemical oxygen demand (COD) in sewage after 4 hours of filter Cr ) and total nitrogen (TN) removal rate of more than 80%, total phosphorus (TP) removal rate of more than 75%. The effluent from the filter can reach the first-level standard of the National Comprehensive Wastewater Discharge Standard (GB8978-1996). The lower sediment collected from the septic tank and the rice straw were mixed evenly at a ratio of 1:6 (mass ratio, the C / N ratio was 26:1), and then put into a fully mixed biogas reactor for anaerobic biological treatment. The fermentation temperature was 55°C, ferment for 40 days with a feeding interval of 15 days, the gas production rate of raw materials can reach up to 380L / kg total solid content (TS), the methane content in biogas is about 55%, and the reactor volum...

Embodiment 2

[0022] The septic tank supernatant and food processing wastewater are collected by the pipeline and discharged into the adjustment tank for adjustment and mixing. The adjusted sewage is pumped into the tower type earthworm ecological filter for treatment, and after 5 hours through the tower type earthworm ecological filter, the sewage in the sewage Chemical Oxygen Demand (COD Cr ) and total nitrogen (TN) removal rate of more than 80%, total phosphorus (TP) removal rate of more than 78%. The effluent of the tower earthworm ecological filter can reach the first-level standard of the national comprehensive sewage discharge standard (GB8978-1996). The lower layer of sediment collected from the septic tank and corn stalks were mixed evenly in a ratio of 3:5 (mass ratio, the C / N ratio was 28:1), and then put into the acid-producing phase of the two-phase biogas reactor. The effluent sewage rich in dissolved organic matter is pumped into the methanogenic phase to complete the methan...

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Abstract

The invention discloses a technique of co-processing ecological type rural sewage water and rural organic solid waste. The process comprises that first adjusting supernatant fluid of an anaerobic tank and other sewage water, treating the adjusted sewage water through a tower earthworm ecological filtering tank to reach the national emission standard and blend and anaerobic ferment the lower deposits of the anaerobic tank and the rural organic solid waste in an anaerobic biogas reactor to produce biogas. The produced biogas is utilized as energy resource, the discharged methane residue is utilized as organic fertilizer or fertilizer of breeding earthworm, the obtained earthworm can also be used to adjust the purity of the post-sewage. The invention proceeds ecological and low cost treatment of the rural sewage water and rural organic solid waste via the combined action of the animal and the microorganism, simultaneously, the produced clean biogas and organic fertilizer have multiple functions of improving rural environmental quality, obtaining clean energy resource and simultaneously treating rural sewage water and rural organic solid waste.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a process for synergistic treatment of ecological rural sewage and organic solid waste. Background technique [0002] With the rapid development of the economy in rural areas of our country and the rapid improvement of people's living standards, the way of life of farmers has undergone great changes. The non-point source pollution caused by the arbitrary discharge of rural sewage and organic solid waste has already caused a huge threat to the rural water environment. Therefore, in order to strengthen the protection of water resources, improve the rural ecological environment, and improve the quality of life of farmers, it is urgent to develop a process for the combined treatment of sewage and solid waste that is suitable for the characteristics of rural areas in our country. Driven by this urgent need, domestic and foreign rural domestic sewage treatment techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F11/04C05F3/04C05F17/00
CPCY02A40/20Y02E50/30Y02W10/20Y02W30/40
Inventor 郑正张继彪罗兴章杨世关李军状黄星发陈广银王卫平邹星星赵国华李坤权孟卓聂耳
Owner NANJING UNIV
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