38 results about "Carbon pool" patented technology

The invention discloses a method for preparing lanthanum-loaded charcoal used for purifying phosphorus polluted water. The method comprises the following steps: adding maize straws which pass through a 60-100-mesh sieve into a lanthanum solution, regulating the pH of the solution to be not less than 10 by using 4-6M of NaOH or ammonium hydroxide, centrifuging, removing supernatant, and cleaning by using 95% ethanol; drying and mashing cleaned solids, and performing pyrolysis in a muffle furnace; cooling a pyrolysis product to room temperature, grinding the materials which pass through the 60-100-mesh sieve, repeatedly cleaning the materials to be pH of below 8 by using distilled water, and drying to obtain products, wherein the product which passes through the 60-100-mesh sieve is the lanthanum-loaded charcoal. The prepared lanthanum-loaded charcoal has the high phosphorus removal efficiency, the preparation process is simple and feasible, the preparation cost is low, straw wastes are fully utilized, the environmental pollution caused by straw incineration is reduced, the lanthanum-loaded charcoal is reutilized for returning to field, and the carbon pool and the phosphorus pool of soil are increased.

The invention relates to the field of fertilizers for acidic soil and particularly relates to a special biochar-based organic and inorganic composite fertilizer for acidic soil and a preparation method thereof. The special biochar-based organic and inorganic composite fertilizer for the acidic soil is prepared from the following raw materials: biochar, an acidity regulating substance, a nitrogen-containing substance, a phosphorus-containing substance, a potassium-containing substance, mineral powder and a granulation binder, wherein the granulation binder comprises attapulgite powder and sodium silicate. The composite fertilizer is prepared by mixing the biochar as a controlled-release material and an adsorption material with other components according to a certain proportion, the matching of the components is reasonable, and the nutritional requirements of growth of crops can be well met; the sustained-release effect is good, and the composite fertilizer only needs to be applied once; the composite fertilizer has the effects of improving the pH value of the soil, improving the content of a carbon pool in soil, improving the aggregate structure and the porosity of the soil and reducing toxicity of heavy metals and organic pollutants and can achieve the effects of saving labor, saving the fertilizer and improving the yield and the quality of agricultural products. The invention further provides the preparation method of the composite fertilizer. The preparation method is simple and feasible.

A method for rapid improvement of soil nutrient storage capacity and soil fertility in saline-alkali farmland in irrigated areas. After autumn harvest, straw and lignin fiber are evenly spread on the surface of saline-alkali farmland, deep plowing and burial to form a biomass interlayer, and sun-dried for overwintering; spring irrigation Salt, spread a mixture of modified zeolite, medical stone, nano-zero-valent iron (nZVI), AM bacterial agent and water-soluble polymer polyacrylamide (PAM), and apply base fertilizer according to the soil texture, and mulch by rotary tillage; Single cropping of green manure, intercropping of green manure or multiple planting of green manure, overturning and returning to the field, the above steps are used in a regular cycle. The invention can reduce the saline-alkali barrier in a long-term manner, accelerate the process of soil agglomeration, increase soil nutrient storage, promote the accumulation of soil carbon pool, and multi-process mutual feedback and synergistic promotion.

The invention provides a device for treating waste water of chemical fiber by adopting an anaerobic method, which relates to a device for treating waste water of industrial production.The invention provides the device for treating waste water of chemical fiber by adopting the anaerobic method, which has economical operation cost and remarkable treating effect.The invention comprise a grid, a water collecting well, a floating oil absorber, a regulating reservoir, an anaerobic pool, a triphase separator, a flow water pulser, a first level biological contact oxidization pond, a first level sedimentation pond, a secondary level biological contact oxidization pond, a secondary level sedimentation pond, a biological carbon pool, a clean water tank, a diving pump, a sludge pool, a submersible sewage pump, a sludge thickener, a dosing tank, a flocculating agent tank, a coagulating tank, a pressure filter, a sludge pump, a first lift pump, a second lift pump, a valve, pipes, etc.

The invention relates to an optimal environment variable screening method for time-space dynamic prediction of a soil organic carbon pool. Soil databases in different periods, and dynamic and static environment variable sets are collected and sorted; and according to the timeliness of soil data, an effective time period, namely, "a time slice" for simulating the soil carbon pool is stipulated. Various attribute information of various dynamic and static environment variables is analyzed according to soil organic carbon density information in different landscape areas, so that an analytic hierarchy process and expert knowledge are used for constructing an effective optimal environment variable set in the specific time slice.

The invention discloses a special fertilizer for carbon-based and selenium-rich tea. The fertilizer is composed of the following raw materials by weight parts: 22-25 parts of biological black carbon, 35-40 parts of urea, 14-16 parts of ammonium dihydrogen phosphate, 16-20 parts of potassium chloride, 4-6 parts of a binder, 1-2 parts of bone meal, 0.2-0.4 parts of ammonium sulfate, and 0.1-0.2 parts of attapulgite. According to the invention, increasing of soil carbon sequestration and organic carbon are obvious, wherein carbon-based carbon sequestration effects are obvious; due to chemical and microbiological inertia of the biological black carbon and physical protection of soil aggregates, the biological black carbon becomes inert carbon pool of the soil, only 5 % of the carbon are re-released into the atmosphere through effects of soil microbe, and 95 % of the carbon are fixed by the soil, thereby generating net carbon absorption; and a fixed time of the biological black carbon in the soil can be hundreds years. A content of soil organic matters can be increased in a short period through turning over of green manure for tea garden soil and application of organic manure, however, a decomposition period is only a few months, and an improvement for the content of the soil organic matters is far lower than the improvement by the biological black carbon. The tea special fertilizer applied with the biological black carbon as an adsorbent can substantially improve the content of soil organic matters and nutrient accumulation.