Deep slag removing method for biogas slurry with high solid content

A technology with high solid content and biogas slurry, applied in chemical instruments and methods, multi-stage water/sewage treatment, water pollutants, etc., can solve the problems of long biochemical treatment cycle, difficult to meet discharge standards, pH buffer enhancement, etc., to achieve Reduce the difficulty of biochemical treatment, promote the precipitation of pollutants, and reduce the effect of pollutant load

CN109574398AInactive Publication Date: 2019-04-05南京贝克特环保科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-04-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a deep slag removing method for biogas slurry with high solid content, and belongs to the field of environment protection. The deep slag removing method includes: cultivating and acclimating compound microorganisms; applying the acclimated compound microorganisms to condition fresh biogas slurry with high solid content; subjecting the conditioned biogas slurry to solid-liquid separation through deep slag removing equipment so as to realize deep slag removing. The deep slag removing method for the biogas slurry with high solid content has the advantages that the difficulty in treatment of the biogas slurry with high solid content is solved, extracellular polymeric substances among particles of the biogas slurry can be peeled off by means of a microorganism method, inert pollutants are enabled to be destabilized, deep slag removal and biogas slurry pollution load reduction are realized by a mechanical dehydration technology, and then the biogas slurry can be conveniently subjected to subsequent simple biochemical treatment before standardized discharging.
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Description

technical field

[0001] The invention belongs to the field of environmental protection, and more specifically relates to a deep slag removal method for biogas liquid with high solid content. Background technique

[0002] With the rapid development of my country's economy, various types of organic wastewater with high concentration and high solid content are produced, such as large-scale livestock and poultry breeding wastewater produced by large-scale breeding, and wastewater produced by kitchen waste treatment. Usually, high-concentration organic wastewater is first processed by anaerobic digestion to produce biogas. The biogas slurry produced is rich in nutrients such as nitrogen, phosphorus, and potassium and trace elements beneficial to plant growth and development. Therefore, biogas slurry has been widely used as an organic fertilizer. agriculture and forestry. However, due to the strong seasonality of agricultural and forestry production, the demand for fertilizers als...

Examples

Embodiment 1

[0040] Anaerobic digestion and fermentation biogas slurry advanced slag removal treatment of kitchen waste wastewater

[0041] The relevant water quality indicators of the biogas slurry produced by the anaerobic digestion treatment of the waste water obtained from pre-treatment processes such as filtration, sorting, crushing, pulping, and three-phase separation of food waste are: COD 18500mg / L, SS 40000mg / L , ammonia nitrogen 2580mg / L, total phosphorus 350mg / L. Its deep slag removal treatment such as figure 1 shown, including the following steps:

[0042] (1) Cultivation and domestication of complex microorganisms: inoculate Bacillus F7 and acidophilus JZ6 isolated from sludge into their respective culture media (g / L of Bacillus F7 medium: glucose 20, peptone 0.5, yeast Paste 0.5, (NH 4 ) 2 SO 4 0.2,K 2 HPO 4 5. KH 2 PO 4 2. MgSO 4 0.2, NaCl 0.1, sterilized at 115°C for 30 minutes; medium for acidophilus JZ6: (NH 4 ) 2 SO 4 3.5, KCl 0.119, K 2 HPO 4 0.58, C...

Embodiment 2

[0064] Advanced slag removal treatment of pig farm manure wastewater by anaerobic digestion biogas slurry

[0065] The pig farm waste water enters the biogas digester after primary solid-liquid separation, and the physicochemical properties of the biogas slurry produced after 3 days of anaerobic fermentation are as follows: COD 11500mg / L, SS 60000mg / L, ammonia nitrogen 850mg / L, total phosphorus 150mg / L . Its deep slag removal treatment such as figure 2 shown, including the following steps:

[0066] (1) Cultivation and domestication of complex microorganisms: inoculate Bacillus F7 and acidophilus JZ6 isolated from sludge into their respective culture media (g / L of Bacillus F7 medium: glucose 20, peptone 0.5, yeast Paste 0.5, (NH 4 ) 2 SO 4 0.2,K 2 HPO 4 5. KH 2 PO 4 2. MgSO 4 0.2, NaCl 0.1, sterilized at 115°C for 30 minutes; medium for acidophilus JZ6: (NH 4 ) 2 SO 4 3.5, KCl 0.119, K 2 HPO 4 0.58, Ca(NO 3 ) 2 4H 2 O 0.168, FeSO 4 ·7H 2 O 4.42, CaCl ...

Embodiment 3

[0070] Anaerobic digestion biogas slurry advanced slag removal treatment of dairy farm manure wastewater

[0071] The manure wastewater from the dairy farm enters the biogas digester after primary solid-liquid separation, and the physicochemical properties of the biogas slurry produced after 5 days of anaerobic fermentation are as follows: COD 45500mg / L, SS 90000mg / L, ammonia nitrogen 1000mg / L, total phosphorus 300mg / L . Its deep slag removal treatment such as image 3 shown, including the following steps:

[0072] (1) Cultivation and domestication of complex microorganisms: inoculate Bacillus F7 and acidophilus JZ6 isolated from sludge into their respective culture media (g / L of Bacillus F7 medium: glucose 20, peptone 0.5, yeast Paste 0.5, (NH 4 ) 2 SO 4 0.2,K 2 HPO 4 5. KH 2 PO 4 2. MgSO 4 0.2, NaCl 0.1, sterilized at 115°C for 30 minutes; medium for acidophilus JZ6: (NH 4 ) 2 SO 4 3.5, KCl 0.119, K 2 HPO 4 0.58, Ca(NO 3 ) 2 4H 2 O 0.168, FeSO 4 ·7H ...