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A method for co-processing refractory animal bones and domestic sewage in rural kitchen waste
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A technology for domestic sewage and kitchen waste, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve problems such as no one has done it, resource consumption, environmental damage, etc., to achieve Low cost, stable effluent quality, and efficient on-site treatment
Inactive Publication Date: 2018-02-09
TONGJI UNIV
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But in general, although these methods can achieve better results, on the one hand, most of them use non-renewable resources, which not only consumes resources, but also may cause damage to the environment; Suitable for application in rural decentralized sewage treatment projects
At present, there are few reports on the use of refractory dry waste from rural domestic waste to prepare fillers for rural domestic sewage treatment. In particular, animal bones in kitchen waste generally need to be sorted out and crushed due to their refractory characteristics. Reduces stress on the environment, causing many inconveniences
Although, the refractory animal bones in rural kitchen waste and domestic sewage are co-disposed, and the refractory characteristics of animal bones are used to prepare them into carriers that are easy to attach to microorganisms. The treatment and disposal of animal bones after the source classification of domestic waste is beneficial to saving the economic cost of domestic sewage treatment in rural areas. However, no one has done so far
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Embodiment 1
[0026] A, remove the superficial flesh and impurities from the pig bones in the collected rural domestic waste food residues, and then rinse them with tap water;
[0027] B, soak the animal bones in step A for 48 hours with a NaOH solution with a mass percentage concentration of 0.5%, remove surface grease and degumming, then wash with tap water repeatedly, and dry at 80°C to remove moisture;
[0028] C, move the animal bone obtained in step B into the muffle furnace, keep it warm at 400°C for 60min at a heating rate of 5°C / min, and then remove it from the muffle furnace after cooling naturally;
[0029] D, crushing the animal bones obtained in step C to a particle size ranging from 0.6 to 2 cm, washing with tap water to neutrality, and obtaining the microbial carrier filler for domestic sewage treatment in rural areas;
[0030] E, using the preferred upflow biological aerated filter reactor, the filler prepared by step D is packed into the biofilter reactor pool body; the act...
Embodiment 2
[0033] A, remove the superficial flesh and impurities from the pig bones in the collected rural domestic waste food residues, and then rinse them with tap water;
[0034] B, soak the animal bones in step A for 24 hours with a NaOH solution with a mass percentage concentration of 1%, remove surface grease and degumming, then wash with tap water repeatedly, and dry at 60°C to remove water;
[0035] C, move the animal bone obtained in step B into a muffle furnace, keep it warm at 500°C for 45min at a heating rate of 5°C / min, and then remove it from the muffle furnace after cooling naturally;
[0036] D, crushing the animal bones obtained in step C to a particle size ranging from 1 to 2 cm, washing with tap water to neutrality, and obtaining the microbial carrier filler for rural domestic sewage treatment;
[0037] E, using the preferred upflow biological aerated filter reactor, take the activated sludge (MLSS is 6100mg / L) from the secondary sedimentation tank of the domestic sewa...
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Abstract
The invention relates to a method for co-processing refractory animal bones and domestic sewage in rural kitchen waste. The invention belongs to the technical field of solid waste resource utilization and sewage treatment. Soak the animal bones in the cleaned rural kitchen waste with NaOH solution, then clean them with tap water and dry them; transfer them to a muffle furnace for burning, cool down, crush them to a suitable particle size, and wash them to obtain the animal bones used for microbial attachment. Carrier filler; put the prepared filler into the upflow bio-filter bed reactor, use activated sludge to inoculate and coat the membrane, and then carry out rural domestic sewage treatment, so as to realize the co-disposal of animal bones and domestic sewage. The process of the invention is simple, and under the condition of short hydraulic retention time (6-10 hours), the effluent water quality is stable and the concentration of pollutants CODCr and NH3-N is lower than the "Pollutant Discharge Standard for Urban Sewage Treatment Plants (GB18918-2002)" At the same time, TP also has a good removal effect, and it has broad prospects for rural domestic sewage treatment.
Description
technical field [0001] The invention relates to a method for co-processing refractory animal bones and domestic sewage in rural kitchen waste. The invention belongs to the technical field of solid waste resource utilization and sewage treatment. Background technique [0002] Rural domestic sewage in my country has the characteristics of wide discharge area, scattered discharge points, rapid increase in discharge volume, high concentration of organic matter, and uneven discharge, making it difficult to centralize treatment. Therefore, the treatment rate of rural domestic sewage in my country is still very low at present, and according to statistics, the treatment rate of sewage in villages is only 7%. Among various rural domestic sewage treatment technologies, the biofilm method is more and more popular due to its advantages of low investment cost, convenient management and maintenance, high treatment efficiency, small footprint, good effluent quality and no sludge bulking p...
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